{"id":582,"date":"2023-02-18T01:40:03","date_gmt":"2023-05-12T18:37:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e9%ab%98%e7%ba%a7scala%e9%9d%a2%e8%af%95%e9%a2%98%e4%b8%8e%e7%ad%94%e6%a1%88\/"},"modified":"2025-08-02T20:11:51","modified_gmt":"2025-08-02T12:11:51","slug":"%e9%ab%98%e7%ba%a7scala%e9%9d%a2%e8%af%95%e9%a2%98%e4%b8%8e%e7%ad%94%e6%a1%88","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%ab%98%e7%ba%a7scala%e9%9d%a2%e8%af%95%e9%a2%98%e4%b8%8e%e7%ad%94%e6%a1%88\/","title":{"rendered":"2023\u5e74\u5fc5\u5907\u9ad8\u7ea7Scala\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\u5927\u5168"},"content":{"rendered":"<p>\u5728\u9605\u8bfb\u672c\u6587\u4e4b\u524d\uff0c\u8bf7\u5148\u67e5\u770b\u6211\u4e4b\u524d\u4e24\u7bc7\u6587\u7ae0\u300aScala\u57fa\u7840\u300b\u548c\u300aScala\u4e2d\u7ea7\u300b\u9762\u8bd5\u95ee\u9898\u4e0e\u7b54\u6848\uff0c\u4ee5\u83b7\u53d6\u5173\u4e8eScala\u8bed\u8a00\u7684\u4e00\u4e9b\u57fa\u672c\u77e5\u8bc6\u3002<\/p>\n<h2>Scala\u8fdb\u9636\u9762\u8bd5\u95ee\u9898\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u4e00\u4e9b\u4e0eScala\u9ad8\u7ea7\u6982\u5ff5\u548c\u4e00\u4e9b\u5b9e\u65f6\u9879\u76ee\u76f8\u5173\u6982\u5ff5\u76f8\u5173\u7684\u9ad8\u7ea7Scala\u9762\u8bd5\u95ee\u9898\u3002\u6ce8\u610f\uff1a\u7531\u4e8e\u8fd9\u4e2a\u5217\u8868\u5df2\u7ecf\u53d8\u5f97\u975e\u5e38\u5927\uff0c\u6211\u5c06\u53d1\u5e03\u53e6\u4e00\u7bc7\u5305\u542b\u5269\u4f59\u95ee\u9898\u548c\u7b54\u6848\u7684\u6587\u7ae0\uff0c\u8bf7\u53c2\u8003\u8be5\u6587\u7ae0\uff1a\u201cScala\u4e2d\u7ea7\u548c\u9ad8\u7ea7\u9762\u8bd5\u95ee\u9898\u53ca\u7b54\u6848\u201d\u3002\u6211\u4eec\u8fd8\u5c06\u8ba8\u8bbaScala\/Java\u5e76\u53d1\u548c\u5e76\u884c\u9762\u8bd5\u95ee\u9898\u548c\u7b54\u6848\uff0c\u8fd9\u5bf9\u4e8e\u8d44\u6df1\u6216\u6709\u7ecf\u9a8c\u7684Scala\/Java\u5f00\u53d1\u4eba\u5458\u5f88\u6709\u7528\u3002<\/p>\n<h3>Scala\u9ad8\u7ea7\u9762\u8bd5\u95ee\u9898\u5728\u8fd9\u4e00\u90e8\u5206\u4e2d\uff0c\u6211\u4eec\u5c06\u5217\u4e3e\u6240\u6709\u7684Scala\u4e2d\u7ea7\u9762\u8bd5\u95ee\u9898\uff0c\u4e0b\u4e00\u90e8\u5206\u6211\u4eec\u5c06\u8be6\u7ec6\u8ba8\u8bba\u5b83\u4eec\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5f53\u524d\u6700\u65b0\u7248\u672c\u7684Scala\u662f\u4ec0\u4e48\uff1fScala 2.12\u6709\u54ea\u4e9b\u91cd\u5927\u6539\u53d8\u6216\u66f4\u65b0\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Scala\u4e2d\u7684Option\u662f\u4ec0\u4e48\uff1fSome\u548cNone\u662f\u4ec0\u4e48\uff1fScala\u4e2d\u7684Option\/Some\/None\u8bbe\u8ba1\u6a21\u5f0f\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Scala\u4e2d\u7684Either\u662f\u4ec0\u4e48\uff1fLeft\u548cRight\u662f\u4ec0\u4e48\uff1fScala\u4e2d\u7684Either\/Left\/Right\u8bbe\u8ba1\u6a21\u5f0f\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Java SE 8\u4e2d\u4e0eScala\u7684Option\u7b49\u6548\u7684\u7ed3\u6784\u662f\u4ec0\u4e48\uff1fOption\u5728Scala\u4e2d\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u51fd\u6570\u5f0f\u7f16\u7a0b\uff08FP\uff09\u6709\u54ea\u4e9b\u4f18\u52bf\u6216\u7eaf\u51fd\u6570\u7684\u4f18\u52bf\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5f00\u53d1RESTful Web Services\u6216REST API\u7684\u6d41\u884c\u7684\u57fa\u4e8eScala\u7684\u6846\u67b6\u6709\u54ea\u4e9b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u751f\u6210\u57fa\u4e8eScala\u5e94\u7528\u7a0b\u5e8f\u7684REST API\u6587\u6863\u7684\u6700\u4f73\u6846\u67b6\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7c7b\u4f3c\u4e8eHibernate\u7528\u4e8e\u57fa\u4e8eJava\u7684\u5e94\u7528\u7a0b\u5e8f\uff0cPlay\/Scala\u5e94\u7528\u7a0b\u5e8f\u4e2d\u53ef\u7528\u7684\u6d41\u884cORM\u6846\u67b6\u6709\u54ea\u4e9b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728MongoDB 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none;\">\n<ol>\u5f00\u53d1Play\u548cScala\u5e94\u7528\u7a0b\u5e8f\u7684\u53ef\u7528\u6784\u5efa\u5de5\u5177\u6709\u54ea\u4e9b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4ec0\u4e48\u662fSBT\uff1f\u5f00\u53d1Play\u548cScala\u5e94\u7528\u7a0b\u5e8f\u7684\u6700\u4f73\u6784\u5efa\u5de5\u5177\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4e3aPlay\u548cScala\u57fa\u4e8e\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u54ea\u4e9b\u53ef\u7528\u7684\u5355\u5143\u6d4b\u8bd5\u3001\u529f\u80fd\u6d4b\u8bd5\u548c\/\u6216BDD\u6846\u67b6\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7528\u4e8ePlay\u548cScala\u57fa\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u54ea\u4e2a\u662f\u6700\u4f73\u7684\u4ee3\u7801\u8986\u76d6\u5de5\u5177\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7528\u4e8ePlay\u548cScala\u57fa\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u54ea\u4e2a\u662f\u6700\u4f73\u7684Scala\u98ce\u683c\u68c0\u67e5\u5668\u5de5\u5177\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u54ea\u4e9bIDE\u652f\u6301Play\u548cScala\u57fa\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u5f00\u53d1\uff0c\u4ee5\u53ca\u5982\u4f55\u652f\u6301\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Play\u7684\u9ed8\u8ba4\u5355\u5143\u6d4b\u8bd5\u548c\u529f\u80fd\u6d4b\u8bd5\u6846\u67b6\u662f\u4ec0\u4e48\uff1fPlay\u7684\u9ed8\u8ba4\u6784\u5efa\u5de5\u5177\u662f\u4ec0\u4e48\uff1fPlay\u7684\u9ed8\u8ba4\u6a21\u677f\u5f15\u64ce\u662f\u4ec0\u4e48\uff1fPlay\u6846\u67b6\u4e2d\u53ef\u7528\u7684\u5185\u7f6eWeb\u670d\u52a1\u5668\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Scala\u76f8\u5bf9\u4e8eJava\u6709\u4ec0\u4e48\u4f18\u52bf\uff1f\u4e0eJava\u76f8\u6bd4\uff0cScala\u7684\u4e3b\u8981\u4f18\u52bf\u6216\u597d\u5904\u6709\u54ea\u4e9b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4ec0\u4e48\u662fScala\u4e2d\u7684\u533f\u540d\u51fd\u6570\uff1f\u4ec0\u4e48\u662fScala\u4e2d\u7684\u51fd\u6570\u5b57\u9762\u91cf\uff1f\u533f\u540d\u51fd\u6570\/\u51fd\u6570\u5b57\u9762\u91cf\u5728Scala\u4e2d\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4ec0\u4e48\u662f\u9ad8\u9636\u51fd\u6570\uff08HOF\uff09\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Case\u7c7b\u548c\u666e\u901a\u7c7b\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4f7f\u7528Play\/Scala\u5806\u6808\u5f00\u53d1web\u5e94\u7528\u7a0b\u5e8f\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4ec0\u4e48\u662f\u540d\u4e3a\u8c03\u7528\uff1fScala\u548cJava\u662f\u5426\u652f\u6301\u540d\u4e3a\u8c03\u7528\uff1f\u6309\u503c\u8c03\u7528\u548c\u6309\u540d\u8c03\u7528\u51fd\u6570\u53c2\u6570\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Java\u4e2d\u4e0d\u652f\u6301\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6784\u9020\u548cScala\u4e2d\u4e0d\u652f\u6301\u7684\u6784\u9020\u6709\u54ea\u4e9b\uff1fScala\u5f15\u5165\u4e86\u54ea\u4e9b\u65b0\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u6784\u9020\uff0c\u4f46Java\u4e0d\u652f\u6301\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7528\u4e8e\u5f00\u53d1\u57fa\u4e8eScala\u8bed\u8a00\u7684Web\u5e94\u7528\u7a0b\u5e8f\u7684\u6d41\u884cMVC\u6846\u67b6\u6709\u54ea\u4e9b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Java\u57fa\u4e8e\u548cScala\u57fa\u4e8e\u7684Maven\u9879\u76ee\u7ed3\u6784\u4e4b\u95f4\u7684\u4e3b\u8981\u5dee\u5f02\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Scala\u4e2d\u7684Extractor\u662f\u4ec0\u4e48\uff1f\u6784\u9020\u51fd\u6570\u548cExtractor\u5728Scala\u4e2d\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1fExtractor\u5728Scala\u4e2d\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684&#8217;???&#8217;\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u89e3\u91caScala Collection API\u4e2dList\u548cStream\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\uff1f\u6211\u4eec\u5982\u4f55\u8bc1\u660e\u8fd9\u4e2a\u5dee\u5f02\uff1f\u4f55\u65f6\u9009\u62e9\u4f7f\u7528Stream\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728Scala\u4e2d\uff0c::\u548c#::\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f:::\u548c#:::\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u5982\u679c\u6211\u60f3\u6210\u4e3a\u4e00\u4e2a\u5168\u6808Scala\u5f00\u53d1\u4eba\u5458\uff0c\u6211\u5e94\u8be5\u5b66\u4e60\u54ea\u4e9b\u6280\u672f\u6808\uff1f<\/ol>\n<h3>Scala\u9ad8\u7ea7\u9762\u8bd5\u95ee\u9898\u4e0e\u7b54\u6848\u5728\u8fd9\u4e2a\u90e8\u5206\uff0c\u6211\u4eec\u5c06\u4ed4\u7ec6\u8ba8\u8bba\u4ee5\u4e0a\u5217\u8868\u4e2d\u7684\u6bcf\u4e00\u4e2a\u95ee\u9898\uff0c\u5e76\u4e3e\u51fa\u9002\u5f53\u7684\u4f8b\u5b50\uff08\u5982\u679c\u9700\u8981\u7684\u8bdd\uff09\u3002\u5982\u679c\u60a8\u60f3\u6df1\u5165\u4e86\u89e3\u8fd9\u4e9b\u6982\u5ff5\u5e76\u5e26\u6709\u4f8b\u5b50\uff0c\u8bf7\u67e5\u770b\u6211\u5728Scala\u6559\u7a0b\u90e8\u5206\u4e4b\u524d\u7684\u5e16\u5b50\u3002<\/p>\n<h3>\u5f53\u524d\u6700\u65b0\u7248\u672c\u7684Scala\u662f\u4ec0\u4e48\uff1fScala 2.12\u6709\u54ea\u4e9b\u91cd\u5927\u53d8\u5316\u6216\u66f4\u65b0\uff1f\u5f53\u524dScala\u7684\u7a33\u5b9a\u7248\u672c\u662f2.11.7\uff0c\u5b83\u652f\u6301Java SE 7\u3002Scala 2.12\u7248\u672c\u7684\u4e3b\u8981\u53d8\u5316\u6216\u66f4\u65b0\u662f\u5b83\u53ea\u652f\u6301Java SE 8\u6216\u66f4\u9ad8\u7248\u672c\u3002Scala 2.12\u4e0e2.11.x\u7cfb\u5217\u4e0d\u5177\u5907\u4e8c\u8fdb\u5236\u517c\u5bb9\u6027\u3002\u76ee\u524d\u5b83\u4ecd\u5904\u4e8e\u91cc\u7a0b\u7891\u6784\u5efa\u9636\u6bb5\u3002<\/p>\n<h3>\u5728Scala\u4e2d\uff0cOption\u662f\u4ec0\u4e48\uff1fSome\u548cNone\u53c8\u662f\u4ec0\u4e48\uff1f\u5728Scala\u4e2d\uff0cOption\/Some\/None\u662f\u4ec0\u4e48\u8bbe\u8ba1\u6a21\u5f0f\uff1f\u5728Scala\u4e2d\uff0c\u4f7f\u7528Option\u6765\u8868\u793a\u53ef\u9009\u7684\u503c\uff0c\u53ef\u4ee5\u5b58\u5728\u6216\u4e0d\u5b58\u5728\u3002Option\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\u3002Option\u6709\u4e24\u4e2a\u5b50\u7c7b\uff1aSome\u548cNone\u3002\u8fd9\u4e09\u4e2a\uff08Option\uff0cSome\u548cNone\uff09\u90fd\u5728\u201cscala\u201d\u5305\u4e2d\u5b9a\u4e49\uff0c\u6bd4\u5982\u201cscala.Option\u201d\u3002Option\u662fScala\u4e2d\u7684\u6709\u754c\u96c6\u5408\uff0c\u53ef\u4ee5\u5305\u542b\u96f6\u4e2a\u6216\u4e00\u4e2a\u5143\u7d20\u3002\u5982\u679cOption\u5305\u542b\u96f6\u4e2a\u5143\u7d20\uff0c\u5219\u4e3aNone\u3002\u5982\u679cOption\u5305\u542b\u4e00\u4e2a\u5143\u7d20\uff0c\u5219\u4e3aSome\u3002Some\u7528\u4e8e\u8868\u793a\u5b58\u5728\u7684\u503c\u3002None\u7528\u4e8e\u8868\u793a\u4e0d\u5b58\u5728\u7684\u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre class=\"post-pre\"><code>def get(val index: Int): Option[String]\r\n<\/code><\/pre>\n<p>\u5047\u8bbe\u8fd9\u4e2a\u65b9\u6cd5\u6765\u81eaList\u3002\u8fd9\u4e2a\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u662fOption[String]\u3002\u5982\u679cList\u5305\u542b\u5143\u7d20\uff0c\u8fd9\u4e2aget\u65b9\u6cd5\u5c06\u8fd4\u56de\u5728\u90a3\u4e2a\u7d22\u5f15\u4f4d\u7f6e\u4e0a\u53ef\u7528\u7684&#8221;Some[String]&#8221;\u5143\u7d20\u3002\u5426\u5219\uff0c\u5b83\u8fd4\u56de&#8221;None&#8221;\uff08\u5373\u6ca1\u6709\u5143\u7d20\uff09\u3002Some\u662f\u4e00\u4e2acase\u7c7b\uff0cNone\u662f\u4e00\u4e2a\u5bf9\u8c61\u3002\u7531\u4e8e\u5b83\u4eec\u90fd\u662fcase\u7c7b\/\u5bf9\u8c61\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u597d\u5730\u5728\u6a21\u5f0f\u5339\u914d\u4e2d\u4f7f\u7528\u5b83\u4eec\u3002\u6240\u6709\u8fd9\u4e09\u4e2a\u5b9a\u4e49\u7684\u7ec4\u5408\u88ab\u79f0\u4e3aScala\u4e2d\u7684Option\/Some\/None\u8bbe\u8ba1\u6a21\u5f0f\u3002<\/p>\n<h3>\u5728Scala\u4e2d\uff0cEither\u662f\u4ec0\u4e48\u610f\u601d\uff1fLeft\u548cRight\u53c8\u662f\u4ec0\u4e48\u610f\u601d\uff1f\u8bf7\u89e3\u91ca\u4e00\u4e0bScala\u4e2d\u7684Either\/Left\/Right\u8bbe\u8ba1\u6a21\u5f0f\u3002<br \/>\n\u5728Scala\u4e2d\uff0cEither\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\u3002\u5b83\u7528\u4e8e\u8868\u793a\u4e24\u79cd\u53ef\u80fd\u7c7b\u578b\u4e2d\u7684\u4e00\u4e2a\u503c\u3002\u5b83\u6709\u4e24\u4e2a\u7c7b\u578b\u53c2\u6570\uff1aEither[A,B]\u3002\u5b83\u786e\u5207\u5730\u5177\u6709\u4e24\u4e2a\u5b50\u7c7b\u578b\uff1aLeft\u548cRight\u3002\u5982\u679cEither[A,B]\u8868\u793a\u4e00\u4e2aA\u5b9e\u4f8b\uff0c\u90a3\u4e48\u5b83\u662fLeft\u3002\u5982\u679c\u5b83\u8868\u793a\u4e00\u4e2aB\u5b9e\u4f8b\uff0c\u90a3\u4e48\u5b83\u662fRight\u3002\u8fd9\u88ab\u79f0\u4e3aScala\u4e2d\u7684Either\/Left\/Right\u8bbe\u8ba1\u6a21\u5f0f\u3002<\/p>\n<h3>\u5728Java SE 8\u4e2d\uff0c\u4ec0\u4e48\u662fScala\u4e2dOption\u7684\u7b49\u6548\u7ed3\u6784\uff1fScala\u4e2d\u7684Option\u6709\u4ec0\u4e48\u7528\u9014\uff1fScala\u7684Option\u7c7b\u4f3c\u4e8eJava SE 8\u7684Optional\u7c7b\u3002Java SE 8\u5f15\u5165\u4e86\u4e00\u4e2a\u65b0\u7684\u5b9e\u7528\u7c7bOptional\uff0c\u7528\u4e8e\u8868\u793a\u67d0\u4e2a\u503c\u7684\u5b58\u5728\u6216\u4e0d\u5b58\u5728\u3002Optional\u53ef\u4ee5\u5728java.util\u5305\u4e2d\u627e\u5230\u3002Scala\u7684Option\u548cJava SE 8\u7684Optional\u90fd\u7528\u4e8e\u8868\u793a\u53ef\u9009\u503c\u3002\u4e24\u8005\u90fd\u7528\u4e8e\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7a7a\u68c0\u67e5\u548cNullPointerException\u3002<\/p>\n<h3>\u51fd\u6570\u5f0f\u7f16\u7a0b\uff08FP\uff09\u6216\u7eaf\u51fd\u6570\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\uff1f\u4ee5\u4e0b\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\uff08FP\uff09\u6216\u7eaf\u51fd\u6570\u7684\u4f18\u52bf\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>More Modular<\/li>\n<li>Easier to understand Or Easier reason about<\/li>\n<li>Easier to test<\/li>\n<li>Less prone to bugs<\/li>\n<li>Easier to reuse<\/li>\n<li>Easier to Parallelism and generalize<\/li>\n<\/ul>\n<h3>\u6709\u54ea\u4e9b\u4f7f\u7528Scala\u5f00\u53d1RESTful Web\u670d\u52a1\u6216REST API\u7684\u6d41\u884c\u6846\u67b6\uff1f\u5f00\u53d1RESTful Web\u670d\u52a1\u6709\u8bb8\u591a\u57fa\u4e8eScala\u7684\u6846\u67b6\u53ef\u4f9b\u9009\u62e9\u3002\u6700\u53d7\u6b22\u8fce\u7684\u6846\u67b6\u5305\u62ec\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Play Framework<br \/>\nIn Play, we call REST API URLs as routes. We place all routes at once place in Play framework. It is a stateless web framework to develop REST API easily.- Scalatra Framework<br \/>\nIt is very simple and easy Scala-based web framework to develop REST API- Spray Framework<br \/>\nIt is very concise and built on top of Akka framework so it\u2019s better to develop REST API using Actor Model.- Lift Framework<br \/>\nIt allows routing using Pattern Matching concept.<\/li>\n<\/ul>\n<h3>\u5728\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u751f\u6210REST API\u6587\u6863\u7684\u6700\u4f73\u6846\u67b6\u662f\u4ec0\u4e48\uff1fSwagger\u662f\u7528\u4e8e\u8fd9\u4e2a\u76ee\u7684\u7684\u6700\u4f73\u5de5\u5177\u3002\u5b83\u662f\u4e00\u4e2a\u975e\u5e38\u7b80\u5355\u4e14\u5f00\u6e90\u7684\u5de5\u5177\uff0c\u7528\u4e8e\u4e3a\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u751f\u6210\u5e26\u6709JSON\u7684REST API\u6587\u6863\u3002<\/p>\n<ul class=\"post-ul\">\n<li>If we use Play with Scala to develop your REST API, then use play-swagger module for REST API documentation.<\/li>\n<li>If we use Spray with Scala to develop your REST API, then use spray-swagger module for REST API documentation.<\/li>\n<\/ul>\n<h3>\u7c7b\u4f3c\u4e8eJava\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684Hibernate\uff0cPlay\/Scala\u5e94\u7528\u7a0b\u5e8f\u4e2d\u6709\u54ea\u4e9b\u53d7\u6b22\u8fce\u7684ORM\u6846\u67b6\u53ef\u4f9b\u4f7f\u7528\uff1f\u5c31\u50cfJPA\u3001Hibernate\u548cToplink\u7b49\u7528\u4e8e\u57fa\u4e8eJava\u7684\u5e94\u7528\u7a0b\u5e8f\u7684ORM\u6846\u67b6\u4e00\u6837\uff0c\u5728\u57fa\u4e8ePlay\/Scala\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4e5f\u6709\u8bb8\u591a\u53ef\u7528\u7684ORM\u6846\u67b6\u3002\u6d41\u884c\u7684\u57fa\u4e8ePlay\/Scala\u5e94\u7528\u7a0b\u5e8f\u7684ORM\u6846\u67b6\u6709\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Slick<\/li>\n<li>Anorm<\/li>\n<li>SORM(Scala ORM)<\/li>\n<li>Squeryl<\/li>\n<\/ul>\n<h3>\u5728\u5f00\u53d1Play\/Scala\u5e94\u7528\u7a0b\u5e8f\u4ee5\u5c06\u6570\u636e\u6301\u4e45\u5316\u5230MongoDB NoSQL\u6570\u636e\u5b58\u50a8\u65f6\uff0c\u6700\u597d\u7684\u5de5\u5177\u662f\u4ec0\u4e48\uff1fReactiveMongo\u662f\u5f00\u53d1Play\/Scala\u5e94\u7528\u7a0b\u5e8f\u5728MongoDB NoSQL\u6570\u636e\u5b58\u50a8\u4e2d\u6301\u4e45\u5316\u6570\u636e\u7684\u6700\u4f73Scala\u9a71\u52a8\u7a0b\u5e8f\u3002\u5b83\u5b8c\u5168\u652f\u6301\u975e\u963b\u585e\u548c\u5f02\u6b65I\/O\u64cd\u4f5c\u3002<\/p>\n<h3>\u76ee\u524d\u6709\u54ea\u4e9b\u53d7\u6b22\u8fce\u7684\u5ba2\u6237\u91c7\u7528Play\u548cScala\u5f00\u53d1\u5e94\u7528\u7a0b\u5e8f\uff1f\u6210\u5343\u4e0a\u4e07\u7684\u5ba2\u6237\u6b63\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u4f7f\u7528Play\u548cScala\u3002\u4ee5\u4e0b\u5217\u8868\u662f\u90a3\u4e9b\u79ef\u6781\u4f7f\u7528Play\u548cScala\u7684\u66f4\u53d7\u6b22\u8fce\u7684\u5ba2\u6237\u3002<\/p>\n<ul class=\"post-ul\">\n<li>LinkedIn<\/li>\n<li>The Guardian<\/li>\n<li>Ocado<\/li>\n<li>LuchidChart<\/li>\n<li>GOV.UK<\/li>\n<\/ul>\n<h3>\u5728\u4f7f\u7528Play\u6846\u67b6\u65f6\uff0c\u4f7f\u7528\u4ec0\u4e48\u8bed\u8a00\u66f4\u597d\uff1aScala\u8fd8\u662fJava\uff1fPlay 2\u662f\u5b8c\u5168\u7528Scala\u7f16\u5199\u7684\u3002\u5982\u679c\u6211\u4eec\u5728Play\u6846\u67b6\u4e2d\u4f7f\u7528Java\uff0c\u6211\u4eec\u9700\u9762\u5bf9\u5f88\u591a\u95ee\u9898\uff0c\u56e0\u4e3aJava\u4e0d\u652f\u6301\u5168\u9762\u7684FP\u7279\u6027\u3002Scala\u662f\u4e0ePlay\u6846\u67b6\u4e00\u8d77\u5f00\u53d1\u9ad8\u5ea6\u53ef\u6269\u5c55\u3001\u6027\u80fd\u66f4\u597d\u3001\u5177\u6709\u5e76\u53d1\/\u5e76\u884c\u6027\u548c\u4f4e\u5ef6\u8fdf\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u6700\u4f73\u9009\u62e9\uff0c\u539f\u56e0\u5982\u4e0b\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Play 2 is completely written in Scala.<\/li>\n<li>It supports full FP features.<\/li>\n<li>It is more expression language than Java.<\/li>\n<li>It supports Akka Actor model very easily<\/li>\n<li>It supports some new OOP feature like Traits.<\/li>\n<li>Play\u2019s built-in templates are developed in Scala<\/li>\n<\/ul>\n<h3>Scala\u5982\u4f55\u540c\u65f6\u652f\u6301\u9ad8\u53ef\u6269\u5c55\u6027\u548c\u9ad8\u6027\u80fd\u5e94\u7528\uff1f\u7531\u4e8eScala\u652f\u6301\u591a\u8303\u5f0f\u7f16\u7a0b\uff08\u9762\u5411\u5bf9\u8c61\u548c\u51fd\u6570\u5f0f\uff09\u5e76\u4f7f\u7528Actor\u5e76\u53d1\u6a21\u578b\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u5f00\u53d1\u9ad8\u5ea6\u53ef\u6269\u5c55\u548c\u9ad8\u6027\u80fd\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<h3>\u5f00\u53d1Play\u548cScala\u5e94\u7528\u7a0b\u5e8f\u6709\u54ea\u4e9b\u53ef\u7528\u7684\u6784\u5efa\u5de5\u5177\uff1f\u4ee5\u4e0b\u662f\u5f00\u53d1Play\u548cScala\u5e94\u7528\u7a0b\u5e8f\u6700\u53d7\u6b22\u8fce\u7684\u4e09\u79cd\u53ef\u7528\u7684\u6784\u5efa\u5de5\u5177\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>SBT<\/li>\n<li>Maven<\/li>\n<li>Gradle<\/li>\n<\/ul>\n<h3>SBT\u662f\u4ec0\u4e48\uff1f\u5f00\u53d1Play\u548cScala\u5e94\u7528\u7a0b\u5e8f\u7684\u6700\u4f73\u6784\u5efa\u5de5\u5177\u662f\u4ec0\u4e48\uff1fSBT\u662fScala Build Tool\u7684\u7f29\u5199\u3002\u5b83\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u6784\u5efa\u5de5\u5177\uff0c\u7528\u4e8e\u5f00\u53d1\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u5927\u591a\u6570\u4eba\u5728Play\u548cScala\u5e94\u7528\u7a0b\u5e8f\u4e2d\u4f7f\u7528SBT\u6784\u5efa\u5de5\u5177\u3002\u4f8b\u5982\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cIntelliJ IDEA Scala\u63d2\u4ef6\u4f7f\u7528SBT\u4f5c\u4e3a\u6784\u5efa\u5de5\u5177\u6765\u5b9e\u73b0\u8fd9\u4e00\u76ee\u7684\u3002<\/p>\n<h3>Play\u548cScala\u57fa\u7840\u5e94\u7528\u7a0b\u5e8f\u6709\u54ea\u4e9b\u53ef\u7528\u7684\u5355\u5143\u6d4b\u8bd5\u3001\u529f\u80fd\u6d4b\u8bd5\u548c\/\u6216BDD\u6846\u67b6\uff1f\u4ee5\u4e0b\u662f\u7528\u4e8ePlay\/Scala\u5e94\u7528\u7684\u6700\u53d7\u6b22\u8fce\u7684\u5355\u5143\u6d4b\u8bd5\u3001\u529f\u80fd\u6d4b\u8bd5\u548c\/\u6216BDD\u6846\u67b6\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Spec2<\/li>\n<li>ScalaTest<\/li>\n<li>ScalaCheck<\/li>\n<li>Mokito<\/li>\n<\/ul>\n<h3>\u5bf9\u4e8e\u57fa\u4e8ePlay\u548cScala\u7684\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u6709\u54ea\u4e9b\u6700\u597d\u7684\u4ee3\u7801\u8986\u76d6\u5de5\u5177\u53ef\u4f9b\u9009\u62e9\uff1fSCoverage\u662f\u7528\u4e8ePlay\u548c\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u4ee3\u7801\u8986\u76d6\u5de5\u5177\u3002SCoverage\u4ee3\u8868Scala\u4ee3\u7801\u8986\u76d6\u5de5\u5177\u3002\u5b83\u6709\u4e09\u4e2a\u5355\u72ec\u7684\u63d2\u4ef6\uff0c\u7528\u4e8e\u652f\u6301\u4ee5\u4e0b\u6784\u5efa\u5de5\u5177\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>SBT<\/li>\n<li>Maven<\/li>\n<li>Gradle<\/li>\n<\/ul>\n<h3>\u5728 Play \u548c\u57fa\u4e8e Scala \u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6709\u54ea\u4e2a\u662f\u6700\u597d\u7684 Scala \u98ce\u683c\u68c0\u67e5\u5de5\u5177\uff1f\u4e0eJava\u5e94\u7528\u7684Checkstyle\u7c7b\u4f3c\uff0cScalastyle\u662f\u7528\u4e8ePlay\u548cScala\u5e94\u7528\u7684\u6700\u4f73Scala\u98ce\u683c\u68c0\u67e5\u5de5\u5177\u3002Scalastyle\u68c0\u67e5\u6211\u4eec\u7684Scala\u6e90\u4ee3\u7801\uff0c\u5e76\u6307\u51fa\u6f5c\u5728\u7684\u95ee\u9898\u3002\u5b83\u6709\u4e09\u4e2a\u72ec\u7acb\u7684\u63d2\u4ef6\uff0c\u7528\u4e8e\u652f\u6301\u4ee5\u4e0b\u6784\u5efa\u5de5\u5177\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>SBT<\/li>\n<li>Maven<\/li>\n<li>Gradle<\/li>\n<\/ul>\n<p>\u5b83\u6709\u4e24\u4e2a\u72ec\u7acb\u7684\u63d2\u4ef6\uff0c\u652f\u6301\u4ee5\u4e0b\u4e24\u4e2aIDE\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>IntelliJ IDEA<\/li>\n<li>Eclipse IDE<\/li>\n<\/ul>\n<h3>\u54ea\u4e9b\u96c6\u6210\u5f00\u53d1\u73af\u5883\uff08IDE\uff09\u652f\u6301Play\u548c\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\uff0c\u4ee5\u53ca\u5b83\u4eec\u7684\u5177\u4f53\u652f\u6301\u65b9\u5f0f\u662f\u4ec0\u4e48\uff1f\u4ee5\u4e0b\u4e24\u4e2a\u6d41\u884c\u7684\u96c6\u6210\u5f00\u53d1\u73af\u5883\u652f\u6301Play\u548c\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u5f00\u53d1\u3002<\/p>\n<ul class=\"post-ul\">\n<li>IntelliJ IDEA<\/li>\n<li>Eclipse IDE<\/li>\n<\/ul>\n<p>Play\u6846\u67b6\u7684\u9ed8\u8ba4\u5355\u5143\u548c\u529f\u80fd\u6d4b\u8bd5\u6846\u67b6\u662fSpec2\u3002\u4f7f\u7528Spec2\u6846\u67b6\u53ef\u4ee5\u8f7b\u677e\u6d4b\u8bd5\u57fa\u4e8ePlay\/Scala\u7684\u5e94\u7528\u7a0b\u5e8f\u3002Play\u6846\u67b6\u7684\u9ed8\u8ba4\u5185\u7f6e\u6a21\u677f\u662f\u201cTwirl\u201d\u3002\u5b83\u662f\u4f7f\u7528Scala\u5f00\u53d1\u7684\u3002\u901a\u8fc7\u4f7f\u7528\u8fd9\u4e9b\u6a21\u677f\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u5f00\u53d1\u57fa\u4e8ePlay\/Scala\u7684\u5e94\u7528\u7a0b\u5e8f\u3002Play\u6846\u67b6\u7684\u5185\u7f6e\u6216\u9ed8\u8ba4Web\u670d\u52a1\u5668\u662fNetty\u670d\u52a1\u5668\u3002<\/p>\n<h3>\u4e3a\u4ec0\u4e48Scala\u6bd4Java\u597d\uff1fScala\u76f8\u5bf9\u4e8eJava\uff08Java 8\uff09\u6709\u54ea\u4e9b\u4f18\u52bf\uff1f\u4e0eJava\u76f8\u6bd4\uff0cScala\u6709\u54ea\u4e9b\u4e3b\u8981\u4f18\u52bf\u6216\u597d\u5904\uff1f\u7531\u4e8eScala\u652f\u6301\u4ee5\u4e0b\u989d\u5916\u529f\u80fd\uff0c\u56e0\u6b64\u5b83\u6bd4Java 8\u66f4\u597d\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Full FP Features<\/li>\n<li>More Expression Language<\/li>\n<li>Pattern Matching<\/li>\n<li>Better support for Akka Actor Model<\/li>\n<li>Automatic resolution for Inheritance Diamond Problem with Traits<\/li>\n<li>Asynchronous and Non-blocking IO programming using Akka Framework<\/li>\n<li>Fully Reactive Streaming API<\/li>\n<\/ul>\n<h3>\u5728Scala\u4e2d\uff0c\u533f\u540d\u51fd\u6570\u662f\u4ec0\u4e48\uff1f\u5728Scala\u4e2d\uff0c\u51fd\u6570\u5b57\u9762\u91cf\u662f\u4ec0\u4e48\uff1f\u5728Scala\u4e2d\uff0c\u4f7f\u7528\u533f\u540d\u51fd\u6570\/\u51fd\u6570\u5b57\u9762\u91cf\u6709\u4ec0\u4e48\u4f18\u52bf\uff1f<br \/>\n\u8fd9\u662f\u6587\u7ae0\u300a\u9ad8\u7ea7Scala\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51714\u90e8\u5206\uff09\u3002<\/p>\n<p>\u533f\u540d\u51fd\u6570\u4e5f\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u4f46\u5b83\u6ca1\u6709\u4efb\u4f55\u51fd\u6570\u540d\u3002\u5b83\u4e5f\u88ab\u79f0\u4e3a\u51fd\u6570\u5b57\u9762\u503c\u3002Scala\u4e2d\u533f\u540d\u51fd\u6570\/\u51fd\u6570\u5b57\u9762\u503c\u7684\u4f18\u52bf\u662f\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u53ef\u4ee5\u5c06\u51fd\u6570\u5b57\u9762\u503c\u8d4b\u503c\u7ed9\u53d8\u91cf<\/li>\n<li>\u53ef\u4ee5\u5c06\u51fd\u6570\u5b57\u9762\u503c\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u51fd\u6570\/\u65b9\u6cd5<\/li>\n<li>\u53ef\u4ee5\u5c06\u51fd\u6570\u5b57\u9762\u503c\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u51fd\u6570\/\u65b9\u6cd5\u7684\u7ed3\u679c\/\u8fd4\u56de\u503c\u8fd4\u56de\u3002<\/li>\n<\/ul>\n<h3>\u4ec0\u4e48\u662f\u9ad8\u9636\u51fd\u6570\uff08HOF\uff09\uff1f<\/h3>\n<p>\u9ad8\u9636\u51fd\u6570\uff08HOF\uff09\u4e5f\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u4f46\u5b83\u53ef\u4ee5\u6267\u884c\u4ee5\u4e0b\u4e00\u9879\u3001\u4e24\u9879\u6216\u8005\u4e24\u8005\u90fd\u6267\u884c\u7684\u529f\u80fd\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u5c06\u5176\u4ed6\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570<\/li>\n<li>\u5c06\u51fd\u6570\u4f5c\u4e3a\u7ed3\u679c\u8fd4\u56de<\/li>\n<\/ul>\n<h3>Case\u7c7b\u548c\u666e\u901a\u7c7b\u4e4b\u95f4\u6709\u54ea\u4e9b\u533a\u522b\uff1f<\/h3>\n<p>\u6837\u4f8b\u7c7b\u4e5f\u662f\u4e00\u4e2a\u7c7b\uff0c\u4f46\u662f\u4e0e\u666e\u901a\u7c7b\u76f8\u6bd4\uff0c\u5b83\u5177\u6709\u4ee5\u4e0b\u989d\u5916\u7684\u7279\u70b9\u6216\u4f18\u52bf\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cCase\u7c7b\u7684\u6784\u9020\u53c2\u6570\u662f&#8217;val&#8217;\u3002\u6211\u4eec\u4e0d\u9700\u8981\u7528&#8217;val&#8217;\u58f0\u660e\u53c2\u6570\u3002<\/li>\n<li>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cCase\u7c7b\u7684\u6784\u9020\u53c2\u6570\u6210\u4e3a\u7c7b\u5b57\u6bb5\u3002<\/li>\n<li>\u8fd9\u4e9b\u65b9\u6cd5\u4f1a\u81ea\u52a8\u6dfb\u52a0\uff1atoString\u3001equals\u3001hashCode\u3001copy\u3001apply\u548cunapply\u3002<\/li>\n<li>\u5b83\u81ea\u52a8\u83b7\u5f97\u4f34\u751f\u5bf9\u8c61\u3002<\/li>\n<li>\u4e0d\u9700\u8981\u4f7f\u7528&#8217;new&#8217;\u5173\u952e\u5b57\u6765\u521b\u5efaCase\u7c7b\u7684\u5b9e\u4f8b\u3002<\/li>\n<li>\u5728\u6a21\u5f0f\u5339\u914d\u4e2d\u6613\u4e8e\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<p>\u6240\u6709\u8fd9\u4e9b\u529f\u80fd\u90fd\u662f\u7531Scala\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u65f6\u6dfb\u52a0\u7684\u3002\u666e\u901a\u7c7b\u65e0\u6cd5\u5b9e\u73b0\u8fd9\u4e9b\u529f\u80fd\u3002<\/p>\n<h3>\u4f7f\u7528Play\/Scala\u6280\u672f\u6808\u5f00\u53d1Web\u5e94\u7528\u7a0b\u5e8f\u6709\u54ea\u4e9b\u4f18\u52bf\uff1f<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528Play\/Scala\u6280\u672f\u6808\u5f00\u53d1Web\u5e94\u7528\u7684\u4e3b\u8981\u4f18\u52bf\uff1a<\/p>\n<ul class=\"post-ul\">\n<li><strong>\u5f00\u6e90<\/strong><br \/>\n\tPlay\u662f\u4e00\u4e2a\u5f00\u6e90\u514d\u8d39\u8f6f\u4ef6\u6846\u67b6\uff0c\u7528\u4e8e\u5f00\u53d1Web\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li><strong>\u66f4\u9ad8\u7684\u751f\u4ea7\u529b<\/strong><br \/>\n\tPlay\u6846\u67b6\u7684\u81ea\u52a8\u91cd\u8f7d\u529f\u80fd\u63d0\u9ad8\u4e86\u5f00\u53d1\u8005\u7684\u751f\u4ea7\u529b\u3002\u65e0\u9700\u6784\u5efa\u3001\u90e8\u7f72\u548c\u6d4b\u8bd5\u6211\u4eec\u7684\u66f4\u6539\u3002\u53ea\u9700\u8fdb\u884c\u66f4\u6539\u5e76\u5237\u65b0\u9875\u9762\u5373\u53ef\u770b\u5230\u66f4\u6539\u6548\u679c\u3002<\/li>\n<li><strong>\u65e0\u72b6\u6001\u548c\u6613\u4e8e\u5f00\u53d1REST API<\/strong><br \/>\n\tPlay\u662f\u57fa\u4e8eHTTP\u7684\u65e0\u72b6\u6001\u6a21\u578b\u6765\u670d\u52a1Web\u8bf7\u6c42\uff0c\u56e0\u6b64\u5f00\u53d1REST API\u6216RESTful Web\u670d\u52a1\u975e\u5e38\u5bb9\u6613\u3002<\/li>\n<li><strong>\u66f4\u597d\u7684\u9519\u8bef\u5904\u7406<\/strong><br \/>\n\t\u5982\u679c\u6211\u4eec\u4f7f\u7528Play\u6846\u67b6\u5f00\u53d1Web\u5e94\u7528\u7a0b\u5e8f\uff0c\u5b83\u4f1a\u4ee5\u975e\u5e38\u6709\u7528\u7684\u683c\u5f0f\u5728\u6d4f\u89c8\u5668\u4e2d\u901a\u77e5\u6240\u6709\u9519\u8bef\u3002\u5b83\u663e\u793a\u9519\u8bef\u6d88\u606f\u3001\u6587\u4ef6\u4f4d\u7f6e\u3001\u9519\u8bef\u53d1\u751f\u7684\u884c\u53f7\uff0c\u5e76\u9ad8\u4eae\u663e\u793a\u4ee3\u7801\u7247\u6bb5\uff0c\u4ee5\u4fbf\u975e\u5e38\u5bb9\u6613\u5730\u7406\u89e3\u9519\u8bef\u3002<\/li>\n<li><strong>\u901a\u8fc7\u54cd\u5e94\u5f0f\u7f16\u7a0b\u5b9e\u73b0\u9ad8\u6027\u80fd\u548c\u66f4\u597d\u7684\u53ef\u6269\u5c55\u6027<\/strong><br \/>\n\tPlay\u6846\u67b6\u662f\u6309\u7167\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u6a21\u5f0f\u5f00\u53d1\u7684\uff0c\u5b83\u6784\u5efa\u5728Netty\u670d\u52a1\u5668\u4e4b\u4e0a\uff0c\u5229\u7528\u975e\u963b\u585eIO\u7279\u6027\u3002\u7531\u4e8e\u8fd9\u4e2a\u7279\u6027\uff0c\u6211\u4eec\u53ef\u4ee5\u975e\u5e38\u5bb9\u6613\u5730\u5f00\u53d1\u9ad8\u53ef\u6269\u5c55\u6027\u548c\u9ad8\u6027\u80fd\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li><strong>\u6613\u4e8e\u6269\u5c55<\/strong><br \/>\n\tPlay\u662f\u975e\u5e38\u7075\u6d3b\u7684\u6846\u67b6\uff0c\u652f\u6301\u5f00\u53d1\u63d2\u4ef6\u4ee5\u975e\u5e38\u5bb9\u6613\u5730\u6269\u5c55\u5176\u529f\u80fd\u548c\u7279\u6027\u3002<\/li>\n<li><strong>\u9ad8\u5e76\u53d1\u6027\u548c\u66f4\u597d\u7684\u5e76\u884c\u6027<\/strong><br \/>\n\t\u7531\u4e8eScala\u548cPlay\u90fd\u652f\u6301\u51fd\u6570\u5f0f\u7f16\u7a0b\uff0c\u56e0\u6b64\u975e\u5e38\u5bb9\u6613\u5f00\u53d1\u9ad8\u5e76\u53d1\u6027\u548c\u66f4\u597d\u7684\u5e76\u884c\u6027\u5e94\u7528\u7a0b\u5e8f\uff0c\u56e0\u4e3aFP\u652f\u6301\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51fd\u6570\uff08\u65e0\u526f\u4f5c\u7528\u7684\u51fd\u6570\uff09\u3001\u6a21\u5f0f\u5339\u914d\u3001Actor\u6a21\u578b\u7b49\u3002<\/li>\n<li><strong>\u66f4\u597d\u7684\u53ef\u91cd\u7528\u6027\u3001\u6613\u4e8e\u6d4b\u8bd5\u548c\u66f4\u9ad8\u7684\u6a21\u5757\u5316<\/strong><br \/>\n\t\u7531\u4e8eScala\u548cPlay\u90fd\u652f\u6301\u51fd\u6570\u5f0f\u7f16\u7a0b\uff0c\u6211\u4eec\u53ef\u4ee5\u5f00\u53d1\u66f4\u52a0\u6a21\u5757\u5316\u548c\u53ef\u91cd\u7528\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u6d4b\u8bd5\u66f4\u52a0\u6a21\u5757\u5316\u7684\u5e94\u7528\u7a0b\u5e8f\u4e5f\u975e\u5e38\u5bb9\u6613\u3002<\/li>\n<\/ul>\n<h3>Java\u548cScala\u7684OOP\u7ed3\u6784\u6709\u54ea\u4e9b\u5dee\u5f02\uff1f<\/h3>\n<p>Java\u4e2d\u4e0d\u652f\u6301\u7684Scala OOP\u6784\u9020\u662f\u4ec0\u4e48\uff1fScala\u4e2d\u5f15\u5165\u7684\u65b0\u7684OOP\u6784\u9020\uff0c\u4f46Java\u4e0d\u652f\u6301\u7684\u662f\u4ec0\u4e48\uff1f<\/p>\n<p>Scala\u4e0d\u652f\u6301\u7684Java\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7279\u6027\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Scala\u4e2d\u6ca1\u6709\u63a5\u53e3\u6982\u5ff5<\/li>\n<li>Scala\u4e2d\u6ca1\u6709\u679a\u4e3e\u6982\u5ff5<\/li>\n<\/ul>\n<p>Scala\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u6784\u9020\u5728Java\u4e2d\u4e0d\u53d7\u652f\u6301\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Scala\u7279\u6027\uff08Traits\uff09<\/li>\n<li>\u81ea\u52a8\u89e3\u51b3\u7ee7\u627f\u83f1\u5f62\u95ee\u9898<\/li>\n<\/ul>\n<h3>\u4ec0\u4e48\u662f\u6309\u540d\u4f20\u9012\uff1fScala\u548cJava\u652f\u6301\u6309\u540d\u4f20\u9012\u5417\uff1f<\/h3>\n<p>\u6309\u503c\u4f20\u9012\u548c\u6309\u540d\u4f20\u9012\u51fd\u6570\u53c2\u6570\u6709\u4ec0\u4e48\u533a\u522b\uff1f\u6309\u540d\u79f0\u8c03\u7528\u610f\u5473\u7740\u4ec5\u5728\u9700\u8981\u6216\u8bbf\u95ee\u65b9\u6cd5\/\u51fd\u6570\u53c2\u6570\u65f6\u5bf9\u5176\u8fdb\u884c\u8bc4\u4f30\u3002\u5982\u679c\u6211\u4eec\u4e0d\u4f7f\u7528\u5b83\u4eec\uff0c\u5219\u4e0d\u4f1a\u8bc4\u4f30\u5b83\u4eec\u3002Scala\u652f\u6301\u6309\u503c\u8c03\u7528\u548c\u6309\u540d\u79f0\u8c03\u7528\u7684\u51fd\u6570\u53c2\u6570\u3002\u7136\u800c\uff0cJava\u53ea\u652f\u6301\u6309\u503c\u8c03\u7528\uff0c\u800c\u4e0d\u652f\u6301\u6309\u540d\u79f0\u8c03\u7528\u3002<\/p>\n<p>\u6309\u503c\u8c03\u7528\u548c\u6309\u540d\u79f0\u8c03\u7528\u7684\u533a\u522b\uff1a\u8fd9\u4e24\u8005\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\u5982\u4e0b\u6240\u8ff0\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u5728\u6309\u540d\u8c03\u7528\u4e2d\uff0c\u51fd\u6570\u53c2\u6570\u4ec5\u5728\u9700\u8981\u65f6\u8bc4\u4f30\uff0c\u800c\u4e0d\u662f\u5728\u8c03\u7528\u51fd\u6570\u65f6\u8bc4\u4f30\u3002<\/li>\n<li>\u5728\u6309\u503c\u8c03\u7528\u4e2d\uff0c\u51fd\u6570\u53c2\u6570\u5728\u8c03\u7528\u51fd\u6570\u65f6\u8bc4\u4f30\u3002<\/li>\n<li>\u5728\u6309\u503c\u8c03\u7528\u4e2d\uff0c\u53c2\u6570\u5728\u6267\u884c\u51fd\u6570\u4e4b\u524d\u8bc4\u4f30\uff0c\u5e76\u4e14\u65e0\u8bba\u6211\u4eec\u5728\u8be5\u51fd\u6570\u4e2d\u4f7f\u7528\u5b83\u4eec\u591a\u5c11\u6b21\uff0c\u5b83\u4eec\u53ea\u8bc4\u4f30\u4e00\u6b21\u3002<\/li>\n<li>\u5728\u6309\u540d\u8c03\u7528\u4e2d\uff0c\u53c2\u6570\u5728\u6211\u4eec\u8bbf\u95ee\u5b83\u4eec\u65f6\u8bc4\u4f30\uff0c\u5e76\u4e14\u6bcf\u6b21\u6211\u4eec\u5728\u8be5\u51fd\u6570\u4e2d\u4f7f\u7528\u5b83\u4eec\u65f6\u90fd\u4f1a\u8bc4\u4f30\u3002<\/li>\n<li><strong>Scala\u8bed\u6cd5\u5dee\u5f02<\/strong><br \/>\n\t\u6309\u503c\u8c03\u7528\uff1a<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>def myFunction(a: Int, b: Int) { }\r\n<\/code><\/pre>\n<p>\u8fd9\u91cca\u548cb\u90fd\u662f\u901a\u8fc7\u503c(call-by-value)\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9myFunction\u51fd\u6570\u3002\u901a\u8fc7\u540d\u79f0(call-by-name)\u7684\u65b9\u5f0f\uff1a<\/p>\n<pre class=\"post-pre\"><code>def myFunction(a: Int, b: =&gt; Int) { }\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0ca\u662f\u6309\u503c\u4f20\u9012\u7684\u53c2\u6570\uff0cb\u662f\u6309\u540d\u79f0\u4f20\u9012\u7ed9myFunction\u51fd\u6570\u3002<\/p>\n<h3>\u5728Scala\u8bed\u8a00\u4e2d\uff0c\u5f00\u53d1Web\u5e94\u7528\u7a0b\u5e8f\u7684\u6d41\u884cMVC\u6846\u67b6\u6709\u54ea\u4e9b\uff1f<\/h3>\n<p>\u4ee5\u4e0b\u662f\u7528\u4e8e\u5f00\u53d1Web\u5e94\u7528\u7a0b\u5e8f\u7684Scala\u8bed\u8a00\u4e2d\u6700\u53d7\u6b22\u8fce\u7684MVC\u6846\u67b6\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Play Framework\uff08Play\u6846\u67b6\uff09<\/li>\n<li>Scalatra Framework\uff08Scalatra\u6846\u67b6\uff09<\/li>\n<li>Spray Framework\uff08Spray\u6846\u67b6\uff09<\/li>\n<li>Lift Framework\uff08Lift\u6846\u67b6\uff09<\/li>\n<\/ul>\n<h3>Java-Based\u548cScala-Based\u7684Maven\u9879\u76ee\u7ed3\u6784\u4e4b\u95f4\u6709\u54ea\u4e9b\u4e3b\u8981\u533a\u522b\uff1f<\/h3>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/656478d1a4b2f92e6c72abc4\/92-1.png\" alt=\"scala\u9ad8\u7ea7\u9762\u8bd5\u9898\uff0cscala maven\u9879\u76ee\u7ed3\u6784\" \/><\/div>\n<h3>Scala\u4e2d\u7684Extractor\u662f\u4ec0\u4e48\uff1f\u6784\u9020\u5668\u548c\u63d0\u53d6\u5668\u5728Scala\u4e2d\u6709\u4ec0\u4e48\u533a\u522b\uff1f\u63d0\u53d6\u5668\u5728Scala\u4e2d\u6709\u4ec0\u4e48\u7528\u9014\uff1f<\/h3>\n<p>\u4e0d\u4ec5\u5728Java\u548cScala\u4e2d\uff0c\u51e0\u4e4e\u5728\u6240\u6709\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u6784\u9020\u51fd\u6570\u90fd\u7528\u4e8e\u4f7f\u7528\u53c2\u6570\uff08\u6216\u7ec4\u4ef6\uff09\u521b\u5efa\uff08\u6216\u7ec4\u88c5\uff09\u4e00\u4e2a\u5bf9\u8c61\u6216\u7c7b\u7684\u5b9e\u4f8b\u3002\u76f8\u53cd\u5730\uff0c\u63d0\u53d6\u5668\u4e0e\u6784\u9020\u51fd\u6570\u7684\u529f\u80fd\u5b8c\u5168\u76f8\u53cd\u3002\u5728Scala\u4e2d\uff0c\u63d0\u53d6\u5668\u7528\u4e8e\u5c06\u5bf9\u8c61\u5206\u89e3\u6216\u89e3\u6784\u6210\u5176\u53c2\u6570\uff08\u6216\u7ec4\u4ef6\uff09\u3002\u5728Scala\u4e2d\uff0capply\u65b9\u6cd5\u626e\u6f14\u7740\u6784\u9020\u51fd\u6570\u7684\u89d2\u8272\u3002\u5728\u5185\u90e8\uff0c\u63d0\u53d6\u5668\u4f7f\u7528unapply\u65b9\u6cd5\u5c06\u5bf9\u8c61\u5206\u89e3\u4e3a\u5176\u7ec4\u6210\u90e8\u5206\uff08\u6216\u53c2\u6570\uff09\u3002\u5728Scala\u4e2d\uff0c\u63d0\u53d6\u5668\u4e3b\u8981\u7528\u4e8e\u6a21\u5f0f\u5339\u914d\u6982\u5ff5\u3002\u6211\u4eec\u5c06\u5728\u540e\u7eed\u5185\u5bb9\u4e2d\u8be6\u7ec6\u8ba8\u8bba\u6a21\u5f0f\u5339\u914d\u6982\u5ff5\u3002<\/p>\n<h3>\u5728\u57fa\u4e8eScala\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c&#8217;???&#8217; \u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u8fd9\u4e09\u4e2a\u95ee\u53f7\u4e0d\u662fScala\u4e2d\u7684\u4e00\u4e2a\u8fd0\u7b97\u7b26\u6216\u65b9\u6cd5\u3002\u5b83\u88ab\u7528\u6765\u6807\u8bb0\u4e00\u4e2a\u6b63\u5728\u8fdb\u884c\u4e2d\u7684\u65b9\u6cd5\uff0c\u610f\u5473\u7740\u5f00\u53d1\u8005\u5e94\u8be5\u4e3a\u8fd9\u4e2a\u65b9\u6cd5\u63d0\u4f9b\u5b9e\u73b0\u3002\u8fd9\u4e2a\u65b9\u6cd5\u88ab\u5b9a\u4e49\u5728scala.PreDef\u7c7b\u4e2d\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code>def ??? : Nothing = throw new NotImplementedError\r\n<\/code><\/pre>\n<p>\u5982\u679c\u6211\u4eec\u5728\u4e0d\u63d0\u4f9b\u5b9e\u73b0\u7684\u60c5\u51b5\u4e0b\u8fd0\u884c\u8be5\u65b9\u6cd5\uff0c\u90a3\u4e48\u5b83\u4f1a\u629b\u51fa\u5982\u4e0b\u6240\u793a\u7684&#8221;NotImplementedError&#8221;\u9519\u8bef\uff1a<\/p>\n<pre class=\"post-pre\"><code>scala&gt; def add(a:Int, b:Int) : Int = ???\r\nadd: (a: Int, b: Int)Int\r\n\r\nscala&gt; add(10,20)\r\nscala.NotImplementedError: an implementation is missing\r\n<\/code><\/pre>\n<h3>\u8bf7\u89e3\u91ca Scala Collection API \u4e2d List \u548c Stream \u7684\u4e3b\u8981\u533a\u522b\u662f\u4ec0\u4e48\uff1f\u6211\u4eec\u5982\u4f55\u8bc1\u660e\u8fd9\u4e00\u533a\u522b\uff1f\u4f55\u65f6\u9009\u62e9 Stream\uff1f<\/h3>\n<p>\u5728Scala\u4e2d\uff0c\u65e0\u8bba\u662fList\u8fd8\u662fStream\u90fd\u6765\u81ea\u4e8eCollection API\uff0c\u5e76\u4e14\u5b83\u4eec\u7684\u5de5\u4f5c\u65b9\u5f0f\u51e0\u4e4e\u76f8\u540c\u3002\u5b83\u4eec\u90fd\u662f\u4e0d\u53ef\u53d8\u7684\u96c6\u5408\u3002\u7136\u800c\uff0c\u5728Scala Collection API\u4e2d\uff0cList\u548cStream\u4e4b\u95f4\u6709\u4e00\u4e2a\u4e3b\u8981\u7684\u533a\u522b\uff1aList\u7684\u5143\u7d20\u88ab\u6025\u5207\u5730\u6c42\u503c\uff0c\u800cStream\u7684\u5143\u7d20\u88ab\u60f0\u6027\u5730\u6c42\u503c\uff0c\u4e5f\u5c31\u662f\u8bf4\u53ea\u6709\u5728\u8bbf\u95ee\u5b83\u4eec\u65f6\u624d\u4f1a\u88ab\u6c42\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code>scala&gt; var list1 = List(1,2,3,4)\r\nlist1: List[Int] = List(1, 2, 3, 4)\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u53ef\u4ee5\u89c2\u5bdf\u5230\u5728\u521b\u5efaList\u5bf9\u8c61\u65f6\uff0c\u6240\u6709\u7684List\u5143\u7d20\u90fd\u88ab\u6c42\u503c\u4e86\u3002\u7136\u800c\uff0c\u5982\u679c\u6211\u4eec\u5728Stream\u4e0a\u505a\u540c\u6837\u7684\u4e8b\u60c5\uff0c\u6211\u4eec\u65e0\u6cd5\u770b\u5230\u6240\u6709\u7684\u5143\u7d20\u3002\u6211\u4eec\u53ea\u80fd\u770b\u5230\u7b2c\u4e00\u4e2a\u88ab\u6c42\u503c\u7684\u5143\u7d20\uff0c\u5269\u4e0b\u7684\u5143\u7d20\u662f\u6309\u9700\u8fdb\u884c\u60f0\u6027\u6c42\u503c\u7684\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code>scala&gt; var s1 = Stream(1,2,3,4)\r\ns1: scala.collection.immutable.Stream[Int] = Stream(1, ?)\r\n<\/code><\/pre>\n<p>\u5f53\u6211\u4eec\u5e0c\u671b\u96c6\u5408\u5728\u8bbf\u95ee\u5143\u7d20\u65f6\u624d\u5bf9\u5176\u8fdb\u884c\u6c42\u503c\u65f6\uff0c\u4f7f\u7528Stream\u662f\u66f4\u597d\u7684\u9009\u62e9\u3002<\/p>\n<h3>\u5728Scala\u4e2d\uff0c&#8221;::&#8221;\u548c&#8221;#::&#8221;\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f&#8221;:::&#8221;\u548c&#8221;#:::&#8221;\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/h3>\n<p>\u5728Scala Collection API\u4e2d\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>:: \u548c ::: \u662fList\u7c7b\u4e2d\u53ef\u7528\u7684\u65b9\u6cd5\u3002<\/li>\n<li>#:: \u548c #::: \u662fStream\u7c7b\u4e2d\u53ef\u7528\u7684\u65b9\u6cd5\u3002<\/li>\n<li>\u5728List\u7c7b\u4e2d\uff0c:: \u65b9\u6cd5\u7528\u4e8e\u5728\u5217\u8868\u7684\u5f00\u5934\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>scala&gt; var list1 = List(1,2,3,4)\r\nlist1: List[Int] = List(1, 2, 3, 4)\r\n\r\nscala&gt; list1 = 0 :: list1\r\nlist1: List[Int] = List(0, 1, 2, 3, 4)\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li>\u5728List\u7c7b\u4e2d\uff0c::: \u65b9\u6cd5\u7528\u4e8e\u5c06\u7ed9\u5b9a\u5217\u8868\u7684\u5143\u7d20\u8fde\u63a5\u5230\u5f53\u524d\u5217\u8868\u7684\u524d\u9762\u3002<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>scala&gt; var list1 = List(3,4,5)\r\nlist1: List[Int] = List(3, 4, 5)\r\n\r\nscala&gt; val list2 = List(1,2) ::: list1\r\nlist2: List[Int] = List(1, 2, 3, 4, 5)\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li>\u5728Stream\u7c7b\u4e2d\uff0c#:: \u65b9\u6cd5\u7528\u4e8e\u5728\u6d41\u7684\u5f00\u5934\u6dfb\u52a0\u4e00\u4e2a\u5143\u7d20\u3002\u53ea\u6709\u8fd9\u4e2a\u65b0\u6dfb\u52a0\u7684\u5143\u7d20\u4f1a\u88ab\u6c42\u503c\uff0c\u540e\u9762\u8ddf\u7740\u7684\u662f\u60f0\u6027\u6c42\u503c\u7684\u6d41\u5143\u7d20\u3002<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>scala&gt; var s1 = Stream(1,2,3,4)\r\ns1: scala.collection.immutable.Stream[Int] = Stream(1, ?)\r\n\r\nscala&gt; s1 = 0 #:: s1\r\ns1: scala.collection.immutable.Stream[Int] = Stream(0, ?)\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li>\u5728Stream\u7c7b\u4e2d\uff0c#::: \u65b9\u6cd5\u7528\u4e8e\u5c06\u7ed9\u5b9a\u7684\u6d41\u8fde\u63a5\u5230\u5f53\u524d\u6d41\u7684\u524d\u9762\u3002\u53ea\u6709\u8fd9\u4e9b\u65b0\u6dfb\u52a0\u7684\u5143\u7d20\u4f1a\u88ab\u6c42\u503c\uff0c\u540e\u9762\u8ddf\u7740\u7684\u662f\u60f0\u6027\u6c42\u503c\u7684\u6d41\u5143\u7d20\u3002<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>scala&gt; var s1 = Stream(1,2,3,4)\r\ns1: scala.collection.immutable.Stream[Int] = Stream(1, ?)\r\n\r\nscala&gt; val s2 = Stream(-1,0) #::: s1\r\ns2: scala.collection.immutable.Stream[Int] = Stream(-1, ?)\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li>:: \u65b9\u6cd5\u4f5c\u4e3aList\u7c7b\u7684\u6784\u9020\u64cd\u4f5c\u7b26\uff08cons operator\uff09\uff0c#:: \u65b9\u6cd5\u4f5c\u4e3aStream\u7c7b\u7684\u6784\u9020\u64cd\u4f5c\u7b26\u3002\u8fd9\u91cc\u7684&#8217;cons&#8217;\u4ee3\u8868&#8217;construct&#8217;\uff08\u6784\u9020\uff09\u3002<\/li>\n<li>::: \u65b9\u6cd5\u4f5c\u4e3aList\u7c7b\u7684\u8fde\u63a5\u64cd\u4f5c\u7b26\uff0c#::: \u65b9\u6cd5\u4f5c\u4e3aStream\u7c7b\u7684\u8fde\u63a5\u64cd\u4f5c\u7b26\u3002<\/li>\n<\/ul>\n<h3>\u5982\u679c\u6211\u60f3\u6210\u4e3a\u4e00\u540d\u5168\u6808Scala\u5f00\u53d1\u8005\uff0c\u6211\u5e94\u8be5\u5b66\u4e60\u54ea\u4e2a\u6280\u672f\u6808\uff1f<\/h3>\n<p>\u5982\u679c\u4f60\u60f3\u6210\u4e3a\u4e00\u540d\u5168\u6808Scala\u5f00\u53d1\u8005\uff0c\u4f60\u5e94\u8be5\u5b66\u4e60\u4ee5\u4e0b\u6280\u672f\u6808\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Scala 2.11.7<\/li>\n<li>Play 2.4.6 \u6846\u67b6<\/li>\n<li>Akka 2.3 \u6846\u67b6<\/li>\n<li>\u6784\u5efa\u5de5\u5177\uff1aSBT\/Maven<\/li>\n<li>JS\u6846\u67b6\uff1aCoffeeScript\/JavaScript<\/li>\n<li>\u96c6\u6210\u5f00\u53d1\u73af\u5883\uff1aIntelliJ IDEA 15\/ Eclipse IDE 4.x<\/li>\n<li>TDD\u548cBDD\u6846\u67b6\uff1aScalaTest, Spec2, ScalaCheck, Mockito<\/li>\n<li>\u4f7f\u7528Play\u548cScala\u7684\u5fae\u670d\u52a1<\/li>\n<li>SCoverage\uff08\u4ee3\u7801\u8986\u76d6\u7387\u5de5\u5177\uff09<\/li>\n<li>Scalastyle\uff08\u4ee3\u7801\u98ce\u683c\u68c0\u67e5\u5de5\u5177\uff09<\/li>\n<li>\u51fd\u6570\u5f0f\u7f16\u7a0b\u8bbe\u8ba1\u6a21\u5f0f<\/li>\n<li>\u4f7f\u7528Scala\u8fdb\u884c\u673a\u5668\u5b66\u4e60<\/li>\n<\/ul>\n<p>\u8bf7\u6ce8\u610f\uff1a\u5728Scala\u4e2d\uff0c\u63d0\u53d6\u5668\u9075\u5faa\u63d0\u53d6\u5668\u8bbe\u8ba1\u6a21\u5f0f\u3002\u5982\u679c\u60a8\u60f3\u6df1\u5165\u5b66\u4e60\uff0c\u8bf7\u53c2\u8003\u6211\u7684Scala\u6559\u7a0b\uff08\u5927\u90e8\u5206\u6587\u7ae0\u90fd\u9075\u5faa\u8fd9\u79cd\u6a21\u5f0f\uff1aScala xxxx\u6df1\u5165\u5256\u6790\uff0c\u5176\u4e2dxxxx\u662f\u4e00\u4e2a\u6982\u5ff5\uff0c\u6bd4\u5982\u63d0\u53d6\u5668\uff09\u3002\u8fd9\u5c31\u662f\u5173\u4e8e&#8221;Scala\u9ad8\u7ea7\u9762\u8bd5\u95ee\u9898\u548c\u7b54\u6848&#8221;\u7684\u5168\u90e8\u5185\u5bb9\u3002\u5728\u6211\u63a5\u4e0b\u6765\u7684\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u66f4\u591aScala\u9762\u8bd5\u95ee\u9898\u548c\u7b54\u6848\u3002\u5982\u679c\u60a8\u559c\u6b22\u6211\u7684\u6587\u7ae0\u6216\u6709\u4efb\u4f55\u95ee\u9898\/\u5efa\u8bae\uff0c\u8bf7\u7ed9\u6211\u7559\u8a00\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u9605\u8bfb\u672c\u6587\u4e4b\u524d\uff0c\u8bf7\u5148\u67e5\u770b\u6211\u4e4b\u524d\u4e24\u7bc7\u6587\u7ae0\u300aScala\u57fa\u7840\u300b\u548c\u300aScala\u4e2d\u7ea7\u300b\u9762\u8bd5\u95ee\u9898\u4e0e\u7b54\u6848\uff0c\u4ee5\u83b7\u53d6\u5173\u4e8eScal [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1677,315,942],"class_list":["post-582","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-scala","tag-315","tag-942"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>2023\u5e74\u5fc5\u5907\u9ad8\u7ea7Scala\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\u5927\u5168 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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content=\"2023\u5e74\u5fc5\u5907\u9ad8\u7ea7Scala\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\u5927\u5168\" \/>\n<meta property=\"og:description\" content=\"\u672c\u6587\u6574\u7406\u4e862023\u5e74\u6700\u65b0\u9ad8\u7ea7Scala\u9762\u8bd5\u9898\u4e0e\u8be6\u7ec6\u7b54\u6848\uff0c\u6db5\u76d6Scala\u6838\u5fc3\u6982\u5ff5\u3001\u51fd\u6570\u5f0f\u7f16\u7a0b\u3001\u5e76\u53d1\u7f16\u7a0b\u7b49\u5173\u952e\u77e5\u8bc6\u70b9\u3002\u8fd9\u4e9b\u9762\u8bd5\u9898\u662f\u5404\u5927\u4e92\u8054\u7f51\u516c\u53f8Scala\u5f00\u53d1\u5c97\u4f4d\u5e38\u89c1\u95ee\u9898\uff0c\u5e2e\u52a9\u7a0b\u5e8f\u5458\u5168\u9762\u51c6\u5907Scala\u6280\u672f\u9762\u8bd5\uff0c\u63d0\u5347\u6c42\u804c\u6210\u529f\u7387\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u9ad8\u7ea7scala\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-05-12T18:37:23+00:00\" 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Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-05-12T18:37:23+00:00\",\"dateModified\":\"2025-08-02T12:11:51+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/f044a4b7fa4ee2701702942002419ca6\"},\"description\":\"\u672c\u6587\u6574\u7406\u4e862023\u5e74\u6700\u65b0\u9ad8\u7ea7Scala\u9762\u8bd5\u9898\u4e0e\u8be6\u7ec6\u7b54\u6848\uff0c\u6db5\u76d6Scala\u6838\u5fc3\u6982\u5ff5\u3001\u51fd\u6570\u5f0f\u7f16\u7a0b\u3001\u5e76\u53d1\u7f16\u7a0b\u7b49\u5173\u952e\u77e5\u8bc6\u70b9\u3002\u8fd9\u4e9b\u9762\u8bd5\u9898\u662f\u5404\u5927\u4e92\u8054\u7f51\u516c\u53f8Scala\u5f00\u53d1\u5c97\u4f4d\u5e38\u89c1\u95ee\u9898\uff0c\u5e2e\u52a9\u7a0b\u5e8f\u5458\u5168\u9762\u51c6\u5907Scala\u6280\u672f\u9762\u8bd5\uff0c\u63d0\u5347\u6c42\u804c\u6210\u529f\u7387\u3002\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e9%ab%98%e7%ba%a7scala%e9%9d%a2%e8%af%95%e9%a2%98%e4%b8%8e%e7%ad%94%e6%a1%88\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/%e9%ab%98%e7%ba%a7scala%e9%9d%a2%e8%af%95%e9%a2%98%e4%b8%8e%e7%ad%94%e6%a1%88\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e9%ab%98%e7%ba%a7scala%e9%9d%a2%e8%af%95%e9%a2%98%e4%b8%8e%e7%ad%94%e6%a1%88\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"2023\u5e74\u5fc5\u5907\u9ad8\u7ea7Scala\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\u5927\u5168\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog 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