{"id":30992,"date":"2023-03-01T02:43:11","date_gmt":"2023-12-19T06:11:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8java%e8%a7%a3%e6%9e%90%e5%b9%b6%e6%89%a7%e8%a1%8cjava%e6%ba%90%e4%bb%a3%e7%a0%81%e3%80%82-2\/"},"modified":"2025-08-12T21:46:11","modified_gmt":"2025-08-12T13:46:11","slug":"%e7%94%a8java%e8%a7%a3%e6%9e%90%e5%b9%b6%e6%89%a7%e8%a1%8cjava%e6%ba%90%e4%bb%a3%e7%a0%81%e3%80%82-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e7%94%a8java%e8%a7%a3%e6%9e%90%e5%b9%b6%e6%89%a7%e8%a1%8cjava%e6%ba%90%e4%bb%a3%e7%a0%81%e3%80%82-2\/","title":{"rendered":"\u7528Java\u89e3\u6790\u5e76\u6267\u884cJava\u6e90\u4ee3\u7801"},"content":{"rendered":"

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\u8bf7\u67e5\u9605 tanzaku\/eval-java-code \u6765\u83b7\u53d6\u6211\u4eec\u5728\u5b9e\u9a8c\u4e2d\u4f7f\u7528\u7684\u6e90\u4ee3\u7801\u3002
\n\u5728 master \u5206\u652f\u4e2d\u5b58\u6709 JDK10 \u7684\u6d4b\u8bd5\u4ee3\u7801\uff0c\u800c\u5728 eval_jdk8 \u5206\u652f\u4e2d\u5b58\u6709 JDK8 \u7684\u6d4b\u8bd5\u4ee3\u7801\u3002<\/p>\n

\u4f7f\u7528Java\u7f16\u8bd1\u5668API\u7684\u65b9\u6cd5<\/h1>\n

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\nJava\u7f16\u8bd1\u5668\u7c7b\u5907\u5fd8\u5f55\uff08Hishidama\u7684Java\u7f16\u8bd1\u5668\u5907\u5fd8\u5f55\uff09<\/p>\n

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\nOpenHFT\/Java-Runtime-Compiler\uff1aJava\u8fd0\u884c\u65f6\u7f16\u8bd1\u5668\u3002<\/p>\n

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\u53ea\u9700\u8981\u8c03\u7528ScriptEngine#eval\u5373\u53ef\u8fdb\u884c\u8bc4\u4f30\uff0c\u9700\u8981\u5c06groovy-all\u6dfb\u52a0\u5230\u7c7b\u8def\u5f84\u4e2d\u3002<\/p>\n

package<\/span> experiments.eval.evaluator<\/span>;<\/span>\r\n\r\nimport<\/span> javax.script.ScriptEngine<\/span>;<\/span>\r\nimport<\/span> javax.script.ScriptEngineManager<\/span>;<\/span>\r\nimport<\/span> javax.script.ScriptException<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> GroovyEvaluator<\/span> {<\/span>\r\n    private<\/span> static<\/span> ScriptEngine<\/span> scriptEngine<\/span> =<\/span> new<\/span> ScriptEngineManager<\/span>().<\/span>getEngineByName<\/span>(<\/span>\"groovy\"<\/span>);<\/span>\r\n\r\n    public<\/span> String<\/span> eval<\/span>(<\/span>final<\/span> String<\/span> sourceCode<\/span>)<\/span> throws<\/span> ScriptException<\/span> {<\/span>\r\n        return<\/span> scriptEngine<\/span>.<\/span>eval<\/span>(<\/span>sourceCode<\/span>).<\/span>toString<\/span>();<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7136\u800c\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u867d\u7136Java\u6e90\u4ee3\u7801\u5728Groovy\u811a\u672c\u4e2d\u53ef\u80fd\u662f\u6709\u6548\u7684\uff0c\u4f46\u5e76\u975e\u603b\u662f\u6709\u6548\u7684\u3002\u4f8b\u5982\uff0c\u7c7b\u4f3c\u4e8enew String[]{“A”}\u7684\u8868\u8fbe\u5f0f\u5728Groovy\u4e2d\u65e0\u6548\uff0c\u9700\u8981\u4f7f\u7528[“A”] as String[]\u6765\u66ff\u4ee3\u3002<\/p>\n
\u203b \u6839\u636e Groovy 3.0 \u7684\u53d1\u5e03\u8bf4\u660e\uff0c\u4f3c\u4e4e\u5df2\u7ecf\u652f\u6301 Java \u98ce\u683c\u7684\u6570\u7ec4\u521d\u59cb\u5316\u3002\u867d\u7136\u8fd9\u662f alpha \u7248\u672c\uff0c\u4f46\u5728 groovy-all 3.0.0-alpha-4 \u53ef\u80fd\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u8bc4\u4f30\u3002
\n\u300aApache Groovy \u7f16\u7a0b\u8bed\u8a00 – Groovy 3.0 \u53d1\u5e03\u8bf4\u660e\u300b<\/p>\n
\u5982\u4f55\u901a\u8fc7JShell\u8fdb\u884c\u8bc4\u4f30<\/h1>\n
\u53ef\u4ee5\u4f7f\u7528Java 9\u4e2d\u65b0\u589e\u7684JShell API\u6765\u8fdb\u884ceval\u64cd\u4f5c\u3002
\nJShell\uff08Java SE 9\u548cJDK 9\uff09<\/p>\n
package<\/span> experiments.eval.evaluator<\/span>;<\/span>\r\n\r\nimport<\/span> java.util.Arrays<\/span>;<\/span>\r\nimport<\/span> java.util.stream.Stream<\/span>;<\/span>\r\n\r\nimport<\/span> jdk.jshell.JShell<\/span>;<\/span>\r\nimport<\/span> jdk.jshell.SnippetEvent<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> JShellEvaluator<\/span> {<\/span>\r\n    private<\/span> Stream<\/span><<\/span>String<\/span>><\/span> splitStatements<\/span>(<\/span>final<\/span> String<\/span> sourceCode<\/span>)<\/span> {<\/span>\r\n        return<\/span> Arrays<\/span>.<\/span>stream<\/span>(<\/span>sourceCode<\/span>.<\/span>split<\/span>(<\/span>\";\"<\/span>)).<\/span>map<\/span>(<\/span>stmt<\/span> -><\/span> stmt<\/span> +<\/span> \";\"<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> String<\/span> eval<\/span>(<\/span>final<\/span> String<\/span> sourceCode<\/span>)<\/span> {<\/span>\r\n        try<\/span> (<\/span>final<\/span> JShell<\/span> jshell<\/span> =<\/span> JShell<\/span>.<\/span>create<\/span>())<\/span> {<\/span>\r\n            \/\/ \u8907\u6570\u306estatement\u3092\u4e00\u5ea6\u306b\u8a55\u4fa1\u3067\u304d\u306a\u3044\u3088\u3046\u3060\u3063\u305f\u306e\u3067\u3001\u5206\u5272\u3057\u3066\u8a55\u4fa1\u3059\u308b<\/span>\r\n            return<\/span> splitStatements<\/span>(<\/span>sourceCode<\/span>)<\/span>\r\n                        .<\/span>flatMap<\/span>(<\/span>stmt<\/span> -><\/span> jshell<\/span>.<\/span>eval<\/span>(<\/span>stmt<\/span>).<\/span>stream<\/span>())<\/span>\r\n                        .<\/span>reduce<\/span>((<\/span>a<\/span>,<\/span>b<\/span>)-><\/span>b<\/span>)<\/span>\r\n                        .<\/span>map<\/span>(<\/span>SnippetEvent:<\/span>:<\/span>value<\/span>)<\/span>\r\n                        .<\/span>orElse<\/span>(<\/span>null<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6bd4\u8f83\u5904\u7406\u65f6\u95f4<\/h1>\n
\u6211\u4eec\u6d4b\u91cf\u4e86\u4f7f\u7528\u4e0d\u540c\u65b9\u6cd5\u8bc4\u4f30\u65f6\u7684\u5904\u7406\u65f6\u95f4\u3002\u6211\u4eec\u6b63\u5728\u6d4b\u91cf\u6267\u884c100\u6b21\u5c0f\u5904\u7406\u6240\u9700\u7684\u65f6\u95f4\u3002\u4e3a\u4e86\u907f\u514d\u7f13\u5b58\uff0c\u8fd9100\u6b21\u5904\u7406\u7565\u6709\u4e0d\u540c\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u8003\u6e90\u4ee3\u7801\u3002<\/p>\n
\n
\u624b\u6cd5JDK ver\u51e6\u7406\u6642\u9593 [sec]Java Compiler APIOracle JDK 814.732Java Compiler APIOracle JDK 1042.743groovyOracle JDK 83.578groovyOracle JDK 104.914JShell APIOracle JDK 10147.294<\/div>\n<\/div>\n
\u5f97\u51fa\u7ed3\u8bba<\/h1>\n
\u7531\u4e8e\u6e90\u4ee3\u7801\u7b80\u6d01\u4e14\u901f\u5ea6\u4e0a\u770b\u8d77\u6765\u5e76\u4e0d\u5dee\uff0c\u6240\u4ee5\u5728groovy\u4e2d\u5bf9\u5176\u8fdb\u884c\u8bc4\u4f30\u4f3c\u4e4e\u662f\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002\u7136\u800c\uff0c\u7531\u4e8e\u5b83\u65e0\u8bba\u5982\u4f55\u90fd\u4f1a\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u7684\u5904\u7406\uff0c\u56e0\u6b64\u5f88\u96be\u9891\u7e41\u4f7f\u7528\u3002
\n\u5f53\u7f16\u8bd1\u5668\u7248\u672c\u6539\u53d8\u65f6\uff0c\u6027\u80fd\u81ea\u7136\u4e5f\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u6b64\u5728\u5347\u7ea7\u7248\u672c\u65f6\u9700\u8981\u6ce8\u610f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\uff0c\u6211\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u7528\u4e8e\u89e3\u6790Java\u6e90\u4ee3\u7801\u7684Java\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u4e14\u5728\u4e1a\u52a1\u4e2d\uff0c\u6709\u65f6\u9700\u8981\u5bf9\u90e8\u5206\u6e90\u4ee3\u7801\u8fdb\u884ceval\u64cd […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30992","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u7528Java\u89e3\u6790\u5e76\u6267\u884cJava\u6e90\u4ee3\u7801 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u7528Java\u89e3\u6790\u5e76\u6267\u884cJava\u6e90\u4ee3\u7801\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7528java\u89e3\u6790\u5e76\u6267\u884cjava\u6e90\u4ee3\u7801\u3002-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u7528Java\u89e3\u6790\u5e76\u6267\u884cJava\u6e90\u4ee3\u7801\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u7528Java\u89e3\u6790\u5e76\u6267\u884cJava\u6e90\u4ee3\u7801\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u7528java\u89e3\u6790\u5e76\u6267\u884cjava\u6e90\u4ee3\u7801\u3002-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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