{"id":304,"date":"2013-07-19T21:30:59","date_gmt":"2013-07-19T13:30:59","guid":{"rendered":"http:\/\/coderbee.net\/?p=304"},"modified":"2014-11-28T20:31:46","modified_gmt":"2014-11-28T12:31:46","slug":"struts2-%e6%bc%8f%e6%b4%9e-%e5%92%8c-%e7%bc%93%e5%ad%98%e6%94%bb%e5%87%bb","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/java\/20130719\/304","title":{"rendered":"struts2 \u6f0f\u6d1e \u548c \u7f13\u5b58\u653b\u51fb"},"content":{"rendered":"<p>\u672c\u6587\u4e3b\u8981\u8bb2\u6211\u5bf9\u6f0f\u6d1e\u7684\u63a2\u7d22\u548c\u63a2\u7d22\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u7684\u4e00\u4e2a\u53ef\u4ee5\u8fdb\u884c\u7f13\u5b58\u653b\u51fb\u7684\u5751\u3002<\/p>\n<h3>\u95ee\u9898<\/h3>\n<p>struts2 \u7684\u6f0f\u6d1e\u5728\u7f51\u4e0a\u5df2\u7ecf\u591f\u70ed\u95f9\u4e86\uff0c\u5404\u4e2a\u6280\u672f\u7ad9\u70b9\u90fd\u662f\u5934\u6761\u663e\u793a\uff0c\u5fae\u535a\u4e0a\u4e5f\u6709\u5927\u4f6c\u8f6c\u53d1\u3002<\/p>\n<p>\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u5371\u5bb3\u884c\u5728\u4e8e\u5141\u8bb8\u6267\u884c\u8fdc\u7a0b\u547d\u4ee4\uff0c\u76f4\u63a5\u653b\u51fb\u670d\u52a1\u5668\uff0c\u5371\u5bb3\u65e0\u7a77\uff1b\u6839\u6e90\u5728\u4e8estruts2\u6846\u67b6\u628a\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u5f53\u4f5c\u547d\u4ee4\u6267\u884c\u4e86\uff0c\u8fd9\u4e5f\u662f\u4e00\u5207\u6ce8\u5165\u4f30\u8ba1\u7684\u6839\u6e90\u3002<\/p>\n<p>\u4eca\u5929\u65c1\u8fb9\u7684\u540c\u4e8bsoul\u5728\u8c03\u8bd5\u5b98\u65b9\u7ed9\u51fa\u7684\u53ef\u653b\u51fb\u7684demo\uff0c\u60f3\u770b\u770b\u5230\u5e95\u662f\u600e\u4e48\u653b\u51fb\uff1b\u6211\u597d\u5947\u7684\u662f\u65e2\u7136\u653b\u51fb\u53ef\u4ee5\u8fdc\u7a0b\u542f\u52a8\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u7684\u8bdd\uff0c\u90a3\u4e48\u90a3\u4e9b\u8f93\u5165\u7684java\u4ee3\u7801\u5e94\u8be5\u4f1a\u88ab\u7f16\u8bd1\uff0c\u7136\u540e\u518d\u6267\u884c\uff0c\u5982\u679c\u662f\u8fd9\u6837\u7684\u8bdd\uff0c\u8fd9\u6846\u67b6\u4e0d\u4f1a\u662f\u5bf9\u6bcf\u4e2a\u8f93\u5165\u90fd\u8fdb\u884c\u52a8\u6001\u7f16\u8bd1\u5427\uff0c\u8fd9\u4f1a\u5f88\u5f71\u54cd\u6027\u80fd\u7684\uff0c\u6240\u4ee5\u6211\u60f3\u770b\u770bstruts2\u5230\u5e95\u662f\u600e\u4e48\u5904\u7406\u7684\uff0c\u5c31\u770b\u6211\u540c\u4e8b\u8c03\u8bd5\u3002<br \/>\n<!--more--><\/p>\n<p>\u542c\u8fc7debug\u8ddf\u8e2a\uff0c\u53d1\u73b0struts2\u4e5f\u4e0d\u662f\u76f4\u63a5\u8c03\u7528Java \u7f16\u8bd1\u5668\u7684\uff08\u6bd5\u7adf\u6027\u80fd\u95ee\u9898\u5728\u90a3\u91cc\uff09\uff0c\u800c\u662f\u76f4\u63a5\u6839\u636e\u8f93\u5165\u547d\u4ee4\u89e3\u6790\u4e3a\u5bf9\u5e94\u7684\u547d\u4ee4\u5bf9\u8c61\uff08struts2\u79f0\u4e3aExpression\uff09\uff0c\u5728\u6267\u884c\u8fd9\u4e2a\u547d\u4ee4\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u547d\u4ee4\u5bf9\u8c61\u4f1a\u7f13\u5b58\u5728 <code>com.opensymphony.xwork2.ognl.OgnlUtil<\/code> \u5bf9\u8c61\u7684\u4e00\u4e2a <code>ConcurrentMap&lt;String, Object&gt;<\/code> \u5c5e\u6027\u91cc\uff0c\u952e\u662f\u8f93\u5165\u7684action \u540d\u79f0\uff0c\u503c\u662f\u547d\u4ee4\u5bf9\u8c61\uff0c\u8fd9\u6837\uff0c\u5bf9\u4e8e\u6bcf\u4e2a\u8f93\u5165\u53c2\u6570\uff0c\u90fd\u5148\u5728\u7f13\u5b58\u67e5\u627e\uff0c\u5982\u679c\u6ca1\u6709\u5219\u8fdb\u884c\u89e3\u6790\uff0c\u8fd9\u4e2a\u903b\u8f91\u5982\u4e0b\uff1a<\/p>\n<pre><code language=\"java\">\n    public Object compile(String expression, Map<String, Object> context) throws OgnlException {\n        Object tree;\n        if (enableExpressionCache) {\n            tree = expressions.get(expression);\n            if (tree == null) {\n                tree = Ognl.parseExpression(expression);\n                expressions.putIfAbsent(expression, tree);\n            }\n        } else {\n            tree = Ognl.parseExpression(expression);\n        }\n\n        if (!enableEvalExpression && isEvalExpression(tree, context)) {\n            throw new OgnlException(\"Eval expressions has been disabled\");\n        }\n\n        return tree;\n    }\n<\/code><\/pre>\n<p>\u5177\u4f53\u7684\u6839\u636e\u8f93\u5165action name\u89e3\u6790\u51fa\u76f8\u5e94\u547d\u4ee4\u5bf9\u8c61\u7684\u4ee3\u7801\u5728\uff1a<\/p>\n<h2>\u8fd9\u4e2a\u8fdc\u7a0b\u6f0f\u6d1e\u7684\u89e3\u51b3\u65b9\u6cd5<\/h2>\n<p>\u4ecd\u7136\u7528\u516c\u5f00\u7684\u653b\u51fb\u65b9\u6cd5\u8fdb\u884c\u653b\u51fb\uff0c\u6839\u636e\u629b\u51fa\u7684\u5f02\u5e38\u4fe1\u606f\uff0c\u53d1\u73b0\uff0c\u5bf9\u8f93\u5165\u53c2\u6570\u540d\u8fdb\u884c\u4e86\u68c0\u67e5\u3002<\/p>\n<p>\u5728 <code>com.opensymphony.xwork2.interceptor.ParametersInterceptor<\/code> \u7c7b\u91cc\u6709\u4e24\u4e2a\u5e38\u91cf\uff1a<\/p>\n<pre><code language=\"java\">\npublic static final String ACCEPTED_PARAM_NAMES = \"\\\\w+((\\\\.\\\\w+)|(\\\\[\\\\d+\\\\])|(\\\\(\\\\d+\\\\))|(\\\\['\\\\w+'\\\\])|(\\\\('\\\\w+'\\\\)))*\";\n\nprotected static final int PARAM_NAME_MAX_LENGTH = 100;\n<\/code><\/pre>\n<p>\u5728\u6b64\u7c7b\u7684\u5176\u4ed6\u4ee3\u7801\u68c0\u67e5\u4e86\u53c2\u6570\u540d\u662f\u5426\u5339\u914d<code>ACCEPTED_PARAM_NAMES<\/code>\uff0c\u4e14\u957f\u5ea6\u4e0d\u8d85\u8fc7<code>PARAM_NAME_MAX_LENGTH<\/code>\u3002<\/p>\n<p>\u8fd9\u6837\u4e4b\u524d\u7684\u90a3\u4e9b\u653b\u51fb\u56e0\u4e3a\u7279\u6b8a\u5b57\u7b26\u90fd\u4e0d\u80fd\u901a\u8fc7\u4e86\uff0c\u4e5f\u5c31\u907f\u514d\u4e86\u8fd9\u4e2a\u6f0f\u6d1e\u3002<\/p>\n<p>\u8fd8\u6709\u4e00\u4e2a\u6539\u52a8\u662f\u5728\u5176\u4ed6\u5730\u65b9\uff0c\u662f\u89e3\u51b3<code>redirect<\/code>\u548c<code>redirectAction<\/code>\u7684\uff0c\u5177\u4f53\u53ef\u5bf9\u6bd4\u4ee3\u7801\u3002<\/p>\n<p>\u603b\u4e4b\uff0c\u8fd9\u4e2a\u8fdc\u7a0b\u6f0f\u6d1e\u653b\u51fb\u786e\u5b9e\u662f\u89e3\u51b3\u4e86\u3002<\/p>\n<h3>\u65b0\u7684\u95ee\u9898<\/h3>\n<p>\u5728\u8c03\u8bd5\u8fc7\u7a0b\u53d1\u73b0\u7684\u4e00\u4e2a\u73b0\u8c61\u662f\uff1a\u6bcf\u4e2a\u8bf7\u6c42\u53c2\u6570\u90fd\u6709\u4e00\u4e2a\u5bf9\u5e94\u7684\u7f13\u5b58\u5728 <code>com.opensymphony.xwork2.ognl.OgnlUtil<\/code> \u7684\u7f13\u5b58\u91cc\uff0c\u4ee5\u53c2\u6570\u540d\u4e3a\u952e\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u8fd9\u662f\u4e00\u4e2a\u5355\u4f8b\u5bf9\u8c61\uff0c\u4e14\u662f\u5168\u5c40\u5171\u4eab\u3002<\/p>\n<p>\u6700\u5927\u7684\u95ee\u9898\u662f\uff0c\u54ea\u6015\u6211\u8f93\u5165\u7684\u53c2\u6570\u540d\u4e0d\u662f\u5408\u6cd5\u7684Action\u7684\u5c5e\u6027\uff0c\u5b83\u4e5f\u4f1a\u7f13\u5b58\u5728\u90a3\u91cc\uff0c\u8fd9\u5c31\u662f\u8bf4\uff1a<strong>\u8fd9\u4e2a\u7f13\u5b58\u7684\u5185\u5bb9\u662f\u7528\u6237\u53ef\u4ee5\u51b3\u5b9a\u7684<\/strong>\u3002<\/p>\n<p>\u6240\u4ee5\u95ee\u9898\u5c31\u7b80\u5355\u4e86\uff0c\u6211\u53d1\u9001\u7684\u6bcf\u4e2a\u8bf7\u6c42\u7684\u53c2\u6570\u540d\u90fd\u662f\u4e0d\u4e00\u6837\u7684\uff0c\u62ffsoul\u672c\u5730\u90e8\u7f72\u7684struts-blank\u5b9e\u4f8b\u6765\u6d4b\u8bd5\uff0c\u6bcf\u4e2a\u8bf7\u6c42\u5c31\u4e00\u4e2a\u53c2\u6570\uff0c1\u4e07\u591a\u4e2a\u53c2\u6570\u5c31\u8ba9\u4ed6OOME\u4e86\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u7684\u53e6\u4e00\u4e2a\u526f\u4f5c\u7528\u5728\u4e8e\uff0c\u5373\u4f7f\u8fd8\u6ca1\u6709OOME\uff0c\u53ea\u8981\u7f13\u5b58\u7684\u6570\u91cf\u8db3\u591f\u591a\u65f6\uff0c\u4e5f\u4f1a\u5bfc\u81f4 <code>ConcurrentMap<\/code> \u9000\u5316\u6210\u4e00\u4e2a\u94fe\u8868\uff0c\u56e0\u4e3a\u6bcf\u4e2a\u4f4d\u6876\u7684\u94fe\u90fd\u4f1a\u5f88\u957f\uff0c\u8fd9\u4e2a\u5f71\u54cd\u5c31\u50cf\u4e4b\u524d\u7206\u51fa\u7684Java Hash \u6f0f\u6d1e\u653b\u51fb\u7684\u6548\u679c\u4e00\u6837\u3002<\/p>\n<p>\u6211\u89c9\u5f97\u8fd9\u662f\u4e00\u4e2abug\uff0c\u5c31\u5728strtus2\u5b98\u7f51\u6ce8\u518c\uff0c\u63d0\u4e86\u4e2aissue <a href=\"https:\/\/issues.apache.org\/jira\/browse\/WW-4146\">https:\/\/issues.apache.org\/jira\/browse\/WW-4146<\/a>\uff0cstruts2\u7684leader\u4e5f\u5f88\u5feb\u56de\u590d\u4e86\uff0c\u8bf4\u8fd9\u4e2a\u7f13\u5b58\u662f\u53ef\u4ee5\u7981\u7528\u7684\uff08\u4ece\u524d\u9762\u7684\u4ee3\u7801\u4e5f\u53ef\u4ee5\u770b\u51fa\uff0c\u53ea\u662f\u6211\u4e00\u6fc0\u52a8\u5c31\u63d0\u5355\u4e86\uff09\uff1a<br \/>\n<code>&lt;constant name=\"struts.ognl.enableExpressionCache\" value=\"false\"\/&gt;<\/code> \uff0c\u6240\u4ee5\u8fd9\u4e0d\u7b97\u662f\u4e2abug\u5427\uff0c\u4f46\u6211\u89c9\u5f97\u8fd9\u7edd\u5bf9\u4e00\u4e2a\u5751\u4e86\uff0c\u56e0\u4e3a<strong>\u9ed8\u8ba4\u662f\u5f00\u542f\u7f13\u5b58\u7684<\/strong>\uff0c\u4e5f\u5c31\u662f\u8bf4\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6211\u662f\u53ef\u4ee5\u8ba9\u7528\u4e86struts2\u7684\u5e94\u7528OOME\u7684\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u7684\u4e3a\u96be\u4e4b\u5904\u5728\u4e8e\uff0c\u867d\u7136\u53ef\u4ee5\u5173\u95ed\u7f13\u5b58\u6765\u907f\u514dOOME\uff0c\u4f46\u662f\u6ca1\u6709\u7f13\u5b58\u80af\u5b9a\u4f1a\u5bfc\u81f4\u6027\u80fd\u52a3\u5316\u3002\u5982\u679c\u7528\u4e86\u7f13\u5b58\uff0c\u4e0d\u7ba1\u7528\u4ec0\u4e48\u7f13\u5b58\u673a\u5236\uff0c\u90fd\u53ef\u80fd\u88ab\u653b\u51fb\u3002<\/p>\n<p>\u76ee\u524d\u4e5f\u6ca1\u6709\u597d\u7684\u89e3\u51b3\u65b9\u6cd5\uff0c\u6240\u4ee5\u8fd8\u662f\u5148\u628a\u7f13\u5b58\u7981\u7528\u4e86\uff0c\u6162\u603b\u6bd4\u65e0\u6cd5\u8bbf\u95ee\u597d\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u5728\u6700\u65b0\u7248\u672c 2.3.15.1 \u4ecd\u7136\u5b58\u5728\u3002<\/p>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u4e3b\u8981\u8bb2\u6211\u5bf9\u6f0f\u6d1e\u7684\u63a2\u7d22\u548c\u63a2\u7d22\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u7684\u4e00\u4e2a\u53ef\u4ee5\u8fdb\u884c\u7f13\u5b58\u653b\u51fb\u7684\u5751\u3002 \u95ee\u9898 st &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/java\/20130719\/304\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[69,70,71],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/304"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=304"}],"version-history":[{"count":6,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/304\/revisions"}],"predecessor-version":[{"id":1098,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/304\/revisions\/1098"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}