{"id":1922,"date":"2017-02-15T19:39:39","date_gmt":"2017-02-15T11:39:39","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=1922"},"modified":"2020-04-15T22:19:46","modified_gmt":"2020-04-15T14:19:46","slug":"java%e5%b7%a5%e7%a8%8b%e5%b8%88%e9%9d%a2%e8%af%95web%e7%af%87%e4%ba%8c","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=1922","title":{"rendered":"Java\u5de5\u7a0b\u5e08\u9762\u8bd5Web\u7bc7(\u4e8c)"},"content":{"rendered":"

\"20140731144525904006\"<\/a><\/h1>\n

\u4e8c\u3001Web\u7bc7<\/h1>\n

JavaScript\u603b\u7ed3<\/a><\/h3>\n

JSP\uff1a<\/h3>\n
\"\"<\/p>\n
JSP\u9875\u9762\u751f\u547d\u5468\u671f.png<\/div>\n<\/div>\n

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\n\u2462\u6700\u540e\u89e3\u6790\u6267\u884c\u8fd9\u4e2aJava\u7c7b\u5f53\u4e2d\u7684jspService\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u5c31\u662f\u4e13\u95e8\u7528\u6765\u5904\u7406\u7528\u6237\u7684\u8bf7\u6c42\u3002<\/p>\n

JSP\u4e5d\u5927\u5185\u7f6e\u5bf9\u8c61\uff1a<\/h3>\n
\"\"<\/p>\n
JSP\u5185\u7f6e\u5bf9\u8c61\u7b80\u4ecb.png<\/div>\n<\/div>\n

out\u5bf9\u8c61<\/strong>\uff1a\u5b83\u662fJspWriter\u7c7b\u7684\u5b9e\u4f8b\uff0c\u662f\u5411\u5ba2\u6237\u7aef\u8f93\u51fa\u5185\u5bb9\u5e38\u7528\u7684\u5bf9\u8c61\u3002
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\n\u5e38\u7528\u65b9\u6cd5<\/em>\uff1a<\/p>\n

request<\/span>.setCharacterEncoding<\/span>(\"UTF-8\"<\/span>);\/\/\u8bbe\u7f6e\u7f16\u7801\uff0c\u89e3\u51b3\u4e2d\u6587\u4e71\u7801\u95ee\u9898\u3002<\/span><\/code><\/pre>\n
request<\/span>.setAttribute<\/span>(\"\"<\/span>,\"\"<\/span>);\/\/\u524d\u8005\u4e3a\u9700\u8981\u8bbe\u7f6e\u7684\u5c5e\u6027\uff0c\u540e\u8005\u4e3a\u9700\u8981\u7684\u503c\u3002<\/span>\r\nrequest<\/span>.getAttribute<\/span>();<\/code><\/pre>\n
request<\/span>.getRequestDispatcher<\/span>(\"index.jsp\"<\/span>).forward<\/span>(request, response);\/\/\u8bf7\u6c42\u8f6c\u53d1\u5230index.jsp\u9875\u9762\uff0c\u8be5\u8bf7\u6c42\u5bf9\u8c61\u662f\u4e00\u76f4\u6709\u6548\u7684\u3002<\/span><\/code><\/pre>\n
response\u5bf9\u8c61<\/strong>\uff1a\u5b83\u5305\u542b\u4e86\u54cd\u5e94\u5ba2\u6237\u8bf7\u6c42\u7684\u76f8\u5173\u4fe1\u606f\uff0c\u5b83\u4e5f\u662fHttpServletResponse\u7c7b\u7684\u5b9e\u4f8b\u3002\u548crequest\u4e00\u6837\uff0c\u5b83\u5177\u6709\u9875\u9762\u7684\u4f5c\u7528\u57df\uff0c\u4e5f\u5c31\u662f\u5728\u8bbf\u95ee\u4e00\u4e2a\u9875\u9762\u7684\u65f6\u5019\uff0c\u8be5\u9875\u9762\u7684response\u5bf9\u8c61\u53ea\u5bf9\u8fd9\u6b21\u8bbf\u95ee\u6709\u6548\uff0c\u5f80\u540e\u6267\u884c\u662f\u4e0d\u5b58\u5728\u3001\u65e0\u6548\u7684\u3002
\n\u5e38\u7528\u65b9\u6cd5<\/em>\uff1a<\/p>\n
response<\/span>.setContentType<\/span>(\"text\/html\"<\/span>,\"charset=\"<\/span>utf-8<\/span>\");\/\/\u8bbe\u7f6e\u54cd\u5e94\u7684MIMI\u7c7b\u578b\u3002<\/span><\/code><\/pre>\n
response<\/span>.sendRedirect<\/span>(\"index.jsp\"<\/span>);\/\/\u8bf7\u6c42\u91cd\u5b9a\u5411\uff0c\u5982\u679c\u5b58\u5728\u591a\u6b21\u91cd\u5b9a\u5411\uff0c\u90a3\u4e48\u5bf9\u8c61\u6570\u636e\u662f\u4e0d\u4f1a\u4fdd\u5b58\u4e0b\u6765\u7684\uff0c\u5373\u4e3anull\u3002<\/span><\/code><\/pre>\n
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\u8bf7\u6c42\u91cd\u5b9a\u5411\uff1a\u5ba2\u6237\u7aef\u884c\u4e3a\uff0cresponse.sendRedirect()\uff0c\u4ece\u672c\u8d28\u4e0a\u8bb2\u7b49\u540c\u4e8e\u4e24\u6b21\u8bf7\u6c42\uff0c\u524d\u4e00\u6b21\u7684\u8bf7\u6c42\u5bf9\u8c61\u4e0d\u4f1a\u4fdd\u5b58\uff0c\u5730\u5740\u680f\u7684URL\u5730\u5740\u4f1a\u6539\u53d8\u3002
\n\u8bf7\u6c42\u8f6c\u53d1\uff1a\u670d\u52a1\u5668\u884c\u4e3a\uff0crequest.getRequestDispatcher().forward(req, resp);\u662f\u4e00\u6b21\u8bf7\u6c42\uff0c\u8f6c\u53d1\u540e\u8bf7\u6c42\u5bf9\u8c61\u4f1a\u4fdd\u5b58\uff0c\u5730\u5740\u680f\u7684URL\u5730\u5740\u4e0d\u4f1a\u6539\u53d8\u3002<\/p><\/blockquote>\n
session\u5bf9\u8c61<\/strong>\uff1a\u5f53\u6211\u4eec\u7b2c\u4e00\u6b21\u8bbf\u95ee\u9875\u9762\u7684\u65f6\u5019\uff0csession\u5bf9\u8c61\u5c31\u4f1a\u88ab\u81ea\u52a8\u88c5\u8f7d\u548c\u521b\u5efa\u3002\u5b83\u662fHttpSession\u7c7b\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002
\n\u4ec0\u4e48\u662f\u4f1a\u8bdd\uff1f\u4e3a\u4ec0\u4e48\u8981\u7528session\u5bf9\u8c61\uff1f<\/em><\/strong><\/p>\n
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\n\u5728\u5b9e\u9645\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u5728\u8bbf\u95ee\u670d\u52a1\u5668\u7684\u8fc7\u7a0b\u4e2d\uff0c\u907f\u514d\u4e0d\u4e86\u4f1a\u5728\u670d\u52a1\u5668\u7684\u51e0\u4e2a\u9875\u9762\u4e4b\u95f4\u5207\u6362\uff0c\u8fd9\u65f6\u5019\u670d\u52a1\u7aef\u6709\u5fc5\u8981\u77e5\u9053\u5f53\u524d\u64cd\u4f5c\u7684\u5ba2\u6237\u662f\u4e0d\u662f\u64cd\u4f5c\u524d\u51e0\u4e2a\u9875\u9762\u7684\u5ba2\u6237\uff0c\u4e5f\u5c31\u662f\u5fc5\u987b\u8981\u6e05\u695a\u77e5\u9053\u662f\u5426\u540c\u4e00\u4e2a\u4eba\u5728\u8fdb\u884c\u64cd\u4f5c\u3002\u6240\u4ee5\u5c31\u5f15\u5165\u4e86session\u5bf9\u8c61\u8fd9\u4e2a\u6982\u5ff5\u3002<\/p><\/blockquote>\n
application\u5bf9\u8c61<\/strong>\uff1a\u5b83\u5b9e\u73b0\u4e86\u7528\u6237\u95f4\u6570\u636e\u7684\u5171\u4eab\uff0c\u53ef\u4ee5\u5b58\u653e\u5168\u5c40\u53d8\u91cf\uff0c\u5b83\u662fServletContext\u7c7b\u7684\u5b9e\u4f8b\u3002\u5b83\u7684\u751f\u547d\u5468\u671f\u5f00\u59cb\u4e8e\u670d\u52a1\u5668\u7684\u542f\u52a8\uff0c\u7ec8\u6b62\u4e8e\u670d\u52a1\u5668\u7684\u5173\u95ed\u3002<\/p>\n
\u6ce8\uff1a
\n\u2460\u5728\u7528\u6237\u7684\u524d\u540e\u8fde\u63a5\u6216\u4e0d\u540c\u7528\u6237\u4e4b\u95f4\u7684\u8fde\u63a5\u4e2d\uff0c\u53ef\u4ee5\u5bf9application\u5bf9\u8c61\u7684\u540c\u4e00\u5c5e\u6027\u8fdb\u884c\u64cd\u4f5c\u3002
\n\u2461\u5728\u4efb\u4f55\u5730\u65b9\u5bf9application\u5bf9\u8c61\u5c5e\u6027\u7684\u64cd\u4f5c\uff0c\u90fd\u5c06\u5f71\u54cd\u5230\u5176\u4ed6\u7528\u6237\u5bf9\u6b64\u7684\u8bbf\u95ee\u3002<\/p><\/blockquote>\n
JSP\u7684\u6307\u4ee4\u548c\u52a8\u4f5c\uff1a<\/h3>\n
\u2460\u4e09\u4e2a\u7f16\u8bd1\u6307\u4ee4\uff1apage\u3001include\u3001taglib\u3002
\n\u2461\u4e03\u4e2a\u52a8\u4f5c\u6307\u4ee4\uff1ajsp:forward\u3001jsp:param\u3001jsp:include\u3001jsp:plugin\u3001jsp:useBean\u3001jsp:setProperty\u3001jsp:getPProperty\u3002<\/p>\n
JSP\u6307\u4ee4<\/strong>\uff1a<\/p>\n
\"\"<\/p>\n
JSP\u6307\u4ee4.png<\/div>\n<\/div>\n
include\u6307\u4ee4\u548cinclude\u52a8\u4f5c\u6307\u4ee4\u533a\u522b<\/strong>\uff1a<\/p>\n
\"\"<\/p>\n
include\u6307\u4ee4\u4e0einclude\u52a8\u4f5c\u7684\u533a\u522b.png<\/div>\n<\/div>\n
Session\u7684\u751f\u547d\u5468\u671f<\/h3>\n
\"\"<\/p>\n
session\u7684\u751f\u547d\u5468\u671f.png<\/div>\n<\/div>\n
Session\u751f\u547d\u5468\u671f\u7684\u201c\u6d3b\u52a8\u201d\u601d\u8def\uff1a
\n\u2460\u67d0\u6b21\u4f1a\u8bdd\u5f53\u4e2d\u901a\u8fc7\u8d85\u94fe\u63a5\u6253\u5f00\u7684\u65b0\u9875\u9762\u5c5e\u4e8e\u540c\u4e00\u6b21\u4f1a\u8bdd\u3002
\n\u2461\u53ea\u6709\u5f53\u524d\u4f1a\u8bdd\u9875\u9762\u6ca1\u6709\u5168\u90e8\u5173\u95ed\uff0c\u91cd\u65b0\u6253\u5f00\u65b0\u7684\u6d4f\u89c8\u5668\u7a97\u53e3\u8bbf\u95ee\u540c\u4e00\u9879\u76ee\u8d44\u6e90\u65f6\u5c5e\u4e8e\u540c\u4e00\u6b21\u4f1a\u8bdd\u3002
\n\u2462\u9664\u975e\u672c\u6b21\u4f1a\u8bdd\u7684\u6240\u6709\u9875\u9762\u90fd\u5173\u95ed\u540e\u518d\u91cd\u65b0\u8bbf\u95ee\u67d0\u4e2aJsp\u6216\u8005Servlet\u5c06\u4f1a\u521b\u5efa\u65b0\u7684\u4f1a\u8bdd\u3002<\/p>\n
\u6ce8\uff1a
\n\u6ce8\u610f\u539f\u6709\u4f1a\u8bdd\u662f\u8fd8\u5b58\u5728\u7684\uff0c\u53ea\u662f\u8fd9\u4e2a\u65e7\u7684SessionId\u4ecd\u7136\u5b58\u5728\u4e8e\u670d\u52a1\u7aef\uff0c\u53ea\u4e0d\u8fc7\u518d\u4e5f\u6ca1\u6709\u5ba2\u6237\u7aef\u4f1a\u643a\u5e26\u5b83\u7136\u540e\u4ea4\u4e88\u670d\u52a1\u7aef\u6821\u9a8c\u3002<\/p><\/blockquote>\n
\"\"<\/p>\n
Session\u4e0eCookie\u7684\u5bf9\u6bd4.png<\/div>\n<\/div>\n
\"\"<\/p>\n
\u8fc7\u6ee4\u5668\u7684\u5de5\u4f5c\u539f\u7406.png<\/div>\n<\/div>\n
\"\"<\/p>\n
\u8fc7\u6ee4\u5668\u7684\u751f\u547d\u5468\u671f.png<\/div>\n<\/div>\n
\u6ce8\uff1a
\n\u2460\u5f53Web\u5bb9\u5668\u542f\u52a8\u7684\u65f6\u5019\uff0c\u8fc7\u6ee4\u5668\u5c31\u5df2\u7ecf\u52a0\u8f7d\u5e76\u542f\u52a8\u4e86\u3002
\n\u2461\u5b9e\u4f8b\u5316\u53ea\u4f1a\u5b9e\u4f8b\u5316\u4e00\u6b21\uff0c\u4e5f\u5c31\u662f\u8bf4\u5728Web\u5bb9\u5668\u4e2d\u53ea\u4f1a\u4f7f\u7528\u4e00\u6b21\u3002<\/p><\/blockquote>\n
\"\"<\/p>\n
\u8fc7\u6ee4\u5668\u7684\u5206\u7c7b.png<\/div>\n<\/div>\n
\"\"<\/p>\n
Servlet\u751f\u547d\u5468\u671f.png<\/div>\n<\/div>\n
\u601d\u8def:
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\n\u2462\u54cd\u5e94\u9636\u6bb5\uff0c\u54cd\u5e94\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\uff0c\u8c03\u7528service()\u65b9\u6cd5\u3002\u7531service()\u65b9\u6cd5\u6839\u636e\u63d0\u4ea4\u65b9\u5f0f\u9009\u62e9\u6027\u6267\u884cdoGet()\u65b9\u6cd5\u6216\u8005doPost()\u65b9\u6cd5\u3002
\n\u2463\u7ec8\u6b62\u9636\u6bb5\uff0c\u8c03\u7528Destroy()\u65b9\u6cd5\u9500\u6bc1\uff0c\u670d\u52a1\u5668\u5173\u95ed\u3002<\/p>\n
\"\"<\/p>\n
Tomcat\u5bb9\u5668\u7b49\u7ea7.png<\/div>\n<\/div>\n
Web\u76d1\u542c\u5668<\/h3>\n
\"\"<\/p>\n
web\u76d1\u542c\u5668.png<\/div>\n<\/div>\n
Web\u76d1\u542c\u5668\u662f\u6709Servlet\u89c4\u8303\u5b9a\u4e49\u7684\u4e00\u79cd\u7279\u6b8a\u7c7b\uff0c\u5b83\u53ef\u4ee5\u76d1\u542c\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u548c\u670d\u52a1\u7aef\u7684\u64cd\u4f5c\uff0c\u540c\u65f6\u5b83\u8fd8\u53ef\u4ee5\u76d1\u542c\uff0c\u5305\u62ecServletContext\u3001HttpSession\u3001ServletRequest\u7b49\u5bf9\u8c61\u3002<\/p>\n
\"\"<\/p>\n
Web\u76d1\u542c\u5668\u7684\u542f\u52a8\u987a\u5e8f.png<\/div>\n<\/div>\n
\u76d1\u542c\u5668\u7684\u5206\u7c7b<\/h3>\n
HttpSession\u7684\u4e8b\u4ef6\u76d1\u542c\u5668<\/strong><\/p>\n
\"\"<\/p>\n
HttpSession\u7684\u4e8b\u4ef6\u76d1\u542c\u5668.png<\/div>\n<\/div>\n
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