{"id":36929,"date":"2023-09-05T07:33:58","date_gmt":"2023-05-27T08:43:39","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/apache-velocity-%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e6%80%bb%e7%bb%93apache-velocity%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e7%9a%84%e6%a6%82%e8%a6%81\/"},"modified":"2024-04-30T21:35:53","modified_gmt":"2024-04-30T13:35:53","slug":"apache-velocity-%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e6%80%bb%e7%bb%93apache-velocity%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e7%9a%84%e6%a6%82%e8%a6%81","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/apache-velocity-%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e6%80%bb%e7%bb%93apache-velocity%e5%9f%ba%e7%a1%80%e7%9f%a5%e8%af%86%e7%9a%84%e6%a6%82%e8%a6%81\/","title":{"rendered":"Apache Velocity \u57fa\u7840\u77e5\u8bc6\u603b\u7ed3Apache Velocity\u57fa\u7840\u77e5\u8bc6\u7684\u6982\u8981"},"content":{"rendered":"

\u6211\u5728\u516c\u53f8\u5185\u505a\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u5907\u5fd8\u5f55\uff0c\u6240\u4ee5\u76f4\u63a5\u8f6c\u8f7d\u3002<\/p>\n

\u57fa\u672c\u4fe1\u606f<\/h2>\n

\u4e0d\u540c\u7248\u672c\u53ef\u80fd\u5b58\u5728\u64cd\u4f5c\u5dee\u5f02\uff0c\u4f46\u4ee5\u4e0b\u94fe\u63a5\u662f\u975e\u5e38\u6709\u53c2\u8003\u4ef7\u503c\u7684\uff1a
\nhttp:\/\/www.jajakarta.org\/velocity\/velocity-1.4\/docs-ja\/user-guide.html<\/p>\n

\u4ee5\u4e0b\u662f\u4ece\u4e0a\u8ff0\u94fe\u63a5\u4e2d\u63d0\u53d6\u51fa\u6765\u7684\u7279\u8272\u5185\u5bb9\u3002<\/p>\n

Getter\u7684\u7701\u7565<\/h2>\n

\u5728Velocity\u6a21\u677f\u4e2d\uff0c\u53ef\u4ee5\u50cf\u4f7f\u7528public\u5b57\u6bb5\u4e00\u6837\u4f7f\u7528getter\u65b9\u6cd5\u3002<\/p>\n

\u8bf7\u5173\u6389\u7535\u89c6\u3002<\/p>\n

${user.userId}\r\n\u2193\r\n\r\nuser \u2192 User\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5834\u5408\u3001user.getUserId() \u3068\u540c\u7b49\u3067\u3059\u3002\r\n<\/code><\/pre>\n
{}\u548c!<\/h2>\n
{} : \u5909\u6570\u304c\u3069\u3053\u304b\u3089\u3069\u3053\u307e\u3067\u304b\u3092\u8868\u3057\u307e\u3059<\/p>\n
\u305f\u3068\u3048\u3070 $hoge \u3068\u3044\u3046\u5909\u6570\u306b “\u3042\u3044\u3046\u3048\u304a” \u3068\u3044\u3046\u5024\u304c\u5165\u3063\u3066\u3044\u305f\u3068\u3057\u3066\u3001
\n“\u3042\u3044\u3046\u3048\u304aaiueo” \u3068\u51fa\u529b\u3057\u305f\u3044\u5834\u5408\u306b\u3001
\n$hogeaiueo \u3068\u8a18\u8f09\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u5909\u6570 $hoge \u3067\u306f\u306a\u304f $hogeaiueo \u3068\u3044\u3046\u5909\u6570\u304c\u53c2\u7167\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u3053\u308c\u3092\u907f\u3051\u308b\u305f\u3081\u306b ${hoge}aiueo \u3068\u3069\u3053\u307e\u3067\u304c\u5909\u6570\u304b\u30de\u30fc\u30af\u3057\u307e\u3059\u3002<\/p>\n
! : \u5909\u6570\u304c\u7a7a\u306e\u5834\u5408\u306e\u51fa\u529b\u5236\u5fa1<\/p>\n
\u5909\u6570\u304c\u672a\u5b9a\u7fa9\u3084null\u306e\u5834\u5408\u306b\u51fa\u529b\u3092\u6291\u5236\u3057\u307e\u3059\u3002
\n$hoge \u304c\u672a\u5b9a\u7fa9\u306e\u5834\u5408\u306b\u51fa\u529b\u3057\u305f\u5834\u5408\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5dee\u7570\u304c\u3042\u308a\u307e\u3059<\/p>\n
${hoge} \u307e\u305f\u306f $hoge \u2026 “$hoge” \u3068\u3044\u3046\u6587\u5b57\u5217\u304c\u51fa\u529b<\/p>\n
$!{hoge} \u307e\u305f\u306f $!hoge \u2026 \u4f55\u3082\u51fa\u529b\u3055\u308c\u306a\u3044<\/p>\n
\u5982\u679c\u5728\u7f51\u7edc\u4e0a\u4f7f\u7528\u7684\u8bdd<\/h2>\n
\u6211\u8ba4\u4e3a\u60a8\u53ef\u80fd\u4e5f\u4f1a\u5728\u4f7f\u7528\u5404\u79cdWEB\u6846\u67b6\u65f6\u8fdb\u884c\u7ed3\u5408\u3002
\n\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u5c06\u4f7f\u7528\u540d\u4e3avelocity-tools\u7684\u5de5\u5177\u3002
\n\u60a8\u53ef\u4ee5\u5728https:\/\/velocity.apache.org\/tools\/devel\/\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n
\u4f7f\u7528velocity-struts\u53ef\u4ee5\u81ea\u52a8\u5316\u5bf9\u6bcf\u4e2a\u4f5c\u7528\u57df\u7684\u5f15\u7528\u3002<\/p>\n
\u4f8b\u5b50\uff1a<\/p>\n
\u539f\u53e5\uff1a\u8bf7\u628a\u8fd9\u672c\u4e66\u7ed9\u6211\u3002
\n\u4e2d\u6587\u7ffb\u8bd1\uff1a\u8bf7\u628a\u4e66\u9012\u7ed9\u6211\u3002<\/p>\n
    \n
  1. \n
      toolbox.xml\u4e2d\u662f\u5426\u5b9a\u4e49\u4e86\uff1f<\/ol>\n<\/li>\n<\/ol>\n
       <\/p>\n
        \n
      1. \n
          \u662f\u6bcf\u4e2aservlet\u7c7b\u7684\u5b9e\u4f8b\u5417\uff1f<\/ol>\n<\/li>\n<\/ol>\n
          $request
          \n$session
          \n$application<\/p>\n
          \u662f\u5426\u5b9a\u4e49\u4e86\u5c40\u90e8\u53d8\u91cf\uff1f
          \n\u662f\u5426\u5728request\u4f5c\u7528\u57df\u4e2d\u5b58\u5728attribute\uff1f
          \n\u662f\u5426\u5728session\u4f5c\u7528\u57df\u4e2d\u5b58\u5728attribute\uff1f
          \n\u662f\u5426\u5728application\u4f5c\u7528\u57df\u4e2d\u5b58\u5728attribute\uff1f<\/p>\n
          \u5982\u679c\u4f60\u5bf9\u201c\u4e3a\u4ec0\u4e48\u5b83\u80fd\u591f\u6267\u884c\uff1f\u201d\u8fd9\u6837\u601d\u8003\u7684\u8bdd\uff0c\u53ef\u80fd\u662f\u56e0\u4e3a\u5728toolbox.xml\u4e2d\u5b9a\u4e49\u4e86\u8bb8\u591a\u5185\u5bb9\u3002<\/p>\n
          \u5b8f<\/h2>\n
          \u53ef\u4ee5\u5728\u540d\u4e3a velocity-macro.vm \u7684\u6587\u4ef6\u4e2d\u5b9a\u4e49\uff0c\u5e76\u4e14\u53ef\u4ee5\u5c06\u5728\u89c6\u56fe\u4e2d\u9891\u7e41\u51fa\u73b0\u7684\u76f8\u4f3c\u64cd\u4f5c\u521b\u5efa\u4e3a\u7c7b\u4f3c\u51fd\u6570\u7684\u5f62\u5f0f\u3002<\/p>\n
          Velocity\u4e2d\u6709\u4e00\u4e2a\u89e3\u6790\u529f\u80fd\uff08\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6vm\u6587\u4ef6\u7684\u529f\u80fd\uff09\uff0c\u4f46\u4e0e\u5b8f\u4e0d\u540c\u7684\u662f\uff0c\u5b83\u65e0\u6cd5\u4f20\u9012\u53c2\u6570\u3002<\/p>\n
          \u5c31\u611f\u89c9\u6765\u8bf4\uff0c<\/p>\n
            \n
          • \n
              \u3088\u308a\u30ed\u30b8\u30c3\u30af\u7684\u306a\u3082\u306e(if\/foreach\u306a\u3069\u3092\u4f7f\u3046\uff09\u306f\u30de\u30af\u30ed<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                HTML\u306e\u90e8\u54c1\u5316(meta\u30bf\u30b0\u3068\u304b)\u306fparse<\/ul>\n
                \u6211\u8ba4\u4e3a\u53ef\u80fd\u6027\u5f88\u9ad8\u3002<\/p>\n
                \u901f\u5ea6\u5728velocity\u4e2d\u6ca1\u6709\u6b63\u786e\u663e\u793a\uff01\uff01<\/h2>\n
                \u6211\u89c9\u5f9790%\u7684\u9519\u8bef\u57fa\u672c\u4e0a\u90fd\u662f\u7531\u4e8e\u57fa\u672c\u7684\u9519\u8bef\u3002\uff08\u5982\u679c\u8fd8\u6709\u5176\u4ed6\u56e0\u7d20\u7684\u8bdd\uff0c\u8bf7\u539f\u8c05\u2026\u2026\uff09<\/p>\n
                \u65e0\u8bba\u8c03\u7528\u591a\u5c11\u6b21form.content.userId\uff0c\u90fd\u65e0\u6cd5\u83b7\u53d6\u503c\u3002<\/p>\n
                \u786e\u8ba4\u4ee5\u4e0b\u5185\u5bb9\uff1a
                \n* \u68c0\u67e5\u8868\u5355\u7684\u503c\u662f\u5426\u5df2\u6b63\u786e\u586b\u5165\u3002
                \n* \u68c0\u67e5\u4e0e\u8868\u5355\u76f8\u5173\u7684\u7c7b\u4e2d\u662f\u5426\u5b58\u5728getContent\u65b9\u6cd5\uff08\u65e0\u53c2\u6570\uff09\u3002
                \n* \u68c0\u67e5\u4e0e\u5185\u5bb9\u76f8\u5173\u7684\u7c7b\u4e2d\u662f\u5426\u5b58\u5728getUserId\u65b9\u6cd5\uff08\u65e0\u53c2\u6570\uff09\u3002<\/p>\n
                \u5c06\u4ee5\u4e0b\u5185\u5bb9\u4ee5\u4e2d\u6587\u8fdb\u884c\u91ca\u4e49\uff0c<\/h2>\n
                HTML\u8f6c\u4e49\u7801<\/p>\n
                \u901a\u8fc7\u4f7f\u7528ReferenceInsertionEventHandler\uff0c\u53ef\u4ee5\u5728\u663e\u793a\u4e4b\u524d\u5e72\u9884\u6240\u6709\u503c\u7684\u663e\u793a\u3002<\/p>\n
                \u6211\u5728\u8fd9\u91cc\u627e\u5230\u4e86\u6709\u7528\u7684\u53c2\u8003\u8d44\u6599\uff1ahttp:\/\/blog.physalis.net\/2013\/05\/01\/velocity-escape.html<\/p>\n
                \u5bf9\u4e8e\u4e0a\u8ff0\u53c2\u8003\u7f51\u7ad9\u7684\u60c5\u51b5\uff0c\u5982\u679c\u5e0c\u671b\u907f\u514d\u8f6c\u4e49\uff0c\u5219\u5728\u53d8\u91cf\u540d\u79f0\u672b\u5c3e\u6dfb\u52a0\u7279\u5b9a\u5b57\u7b26\u4e32(NoEscape)\uff0c\u4ee5\u9632\u6b62\u8f6c\u4e49\u3002<\/p>\n
                \u8fd9\u6837\u4e5f\u5f53\u7136\u6ca1\u95ee\u9898\uff0c
                \n\u4f46\u662f\u4e4b\u540e\u5c31\u53d8\u5f97\u6709\u70b9\u770b\u4e0d\u61c2\u4e86\uff0c
                \n\u6240\u4ee5\u6700\u597d\u5728\u901a\u8fc7velocity-toolbox\u8c03\u7528\u7684\u51fd\u6570\u4e2d\u51c6\u5907\u4e00\u4e2a\u65e0\u64cd\u4f5c\u7684\u865a\u62df\u51fd\u6570\uff0c
                \n\u5982\u679c\u88ab\u5305\u88f9\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c\u4e2a\u4eba\u89c9\u5f97\u6700\u597d\u907f\u514d\u3002<\/p>\n
                public<\/span> String<\/span> noescape<\/span>(<\/span>String<\/span> org<\/span>)<\/span> {<\/span>\r\n  \/\/ \u30a8\u30b9\u30b1\u30fc\u30d7\u56de\u907f\u7528\u306e\u30c0\u30df\u30fc\u95a2\u6570\u3002<\/span>\r\n  \/\/ \u8a73\u7d30\u306fReferenceInsertionEventHandler\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u3092\u53c2\u7167<\/span>\r\n  return<\/span> org<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                ${<\/span>utils<\/span>.<\/span>noescape<\/span>(<\/span>hoge<\/span>)}<\/span>\r\n<\/code><\/pre>\n
                \u6211\u60f3\u8c03\u7528 enum\u3002<\/h2>\n
                \u5728FieldMethodizer\u4e2d\u4e5f\u4e0d\u662f\u5b8c\u5168\u4e0d\u80fd\u4f7f\u7528\u3002
                \n\u867d\u7136\u6709\u70b9\u5f3a\u884c\u7684\u65b9\u6cd5\u611f\u89c9\uff0c\u6240\u4ee5\u8bf7\u81ea\u884c\u627f\u62c5\u8d23\u4efb\u3002\u3002\u3002<\/p>\n
                public<\/span> enum<\/span> Hoge<\/span> {<\/span>\r\n  PIYO<\/span>,<\/span>\r\n  FUGA<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                request<\/span>.<\/span>setAttribute<\/span>(<\/span>\"hoge\"<\/span>,<\/span> new<\/span> FieldMethodizer<\/span>(<\/span>Hoge<\/span>.<\/span>class<\/span>.<\/span>getCanonicalName<\/span>()));<\/span>\r\n<\/code><\/pre>\n
                ${<\/span>hoge<\/span>.<\/span>PIYO<\/span>.<\/span>name<\/span>()}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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