{"id":1643,"date":"2017-07-14T16:25:16","date_gmt":"2017-07-14T08:25:16","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=1643"},"modified":"2017-07-14T16:25:47","modified_gmt":"2017-07-14T08:25:47","slug":"%e8%af%a6%e8%a7%a3-spring-mvc-%e4%b8%ad%e7%9a%84-cacheseconds-%e5%92%8c-last-modified","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=1643","title":{"rendered":"\u8be6\u89e3 Spring MVC \u4e2d\u7684 cacheSeconds \u548c Last-Modified"},"content":{"rendered":"

\n\t\u5173\u4e8e Session \u540c\u6b65\u4e00\u822c\u5728 SSO \u5355\u70b9\u767b\u5f55\u4e2d\u4f1a\u7528\u5230\u3002\u5728 Struts2 \u4e2d\u6211\u4eec\u4e00\u822c\u91c7\u7528\u7684\u90fd\u662f Servlet \u9ed8\u8ba4\u7684\u914d\u7f6e\u3002\u4f46\u6709\u65f6\u5019\u6709\u4e9b\u9700\u8981\u548c\u573a\u666f\u5374\u9700\u8981\u6211\u4eec\u8fdb\u884c Session \u540c\u6b65\u914d\u7f6e\u3002\u4f8b\u5982\u5173\u4e8e\u7f13\u5b58\u65b9\u9762\u7684\u914d\u7f6e\uff0c\u5982\u679c\u6709\u5206\u5e03\u5f0f\u7cfb\u7edf\uff0c\u4e0d\u8fdb\u884c Session \u540c\u6b65\uff0c\u5c31\u4f1a\u4ea7\u751f\u5f88\u4e25\u91cd\u7684\u95ee\u9898\u3002\u672c\u7ae0\u5c06\u91cd\u70b9\u8bb2\u89e3 SpringMVC\u4e2d\u7684cacheSeconds\u77e5\u8bc6\u3002\n<\/p>\n

\n\t\u5ba2\u6237\u7aefcacheSeconds\u7f13\u5b58\u63a7\u5236
\n<\/h2>\n

\n\t\u6211\u4eec\u5148\u8bbe\u7f6e\u7f13\u5b585\u79d2\uff0ccacheSeconds=5\uff0c\u770b\u770b\u6548\u679c\u3002\n<\/p>\n

\r\npackage cn.javass.chapter4.web.controller;\r\n\/\/\u7701\u7565import\r\npublic class HelloWorldCacheController extends AbstractController {\r\n\t@Override\r\n\tprotected ModelAndView handleRequestInternal(HttpServletRequest req, \r\n\t\tHttpServletResponse resp) throws Exception {\r\n\t\t\/\/\u70b9\u51fb\u540e\u518d\u6b21\u8bf7\u6c42\u5f53\u524d\u9875\u9762\r\n\t\tresp.getWriter().write("<a href=''>this<\/a>");\r\n\t\treturn null;\r\n\t}\r\n}<\/pre>\n
\r\n<!— \u5728chapter4-servlet.xml\u914d\u7f6e\u5904\u7406\u5668 -->\r\n<bean name="\/helloCache" class="com.xttblog.web.controller.HelloWorldCacheController">\r\n\t<property name="cacheSeconds" value="5"\/>\r\n<\/bean><\/pre>\n
\n\t\u5982\u4e0a\u914d\u7f6e\u8868\u793a\u544a\u8bc9\u6d4f\u89c8\u5668\u7f13\u5b585\u79d2\u949f,\u5f00\u542fchrome\u6d4f\u89c8\u5668\u8c03\u8bd5\u5de5\u5177\u3002\n<\/p>\n
\n\t\"\u5f00\u542fchrome\u6d4f\u89c8\u5668\u8c03\u8bd5\u5de5\u5177\"\n<\/p>\n
\n\t\u670d\u52a1\u5668\u8fd4\u56de\u7684\u54cd\u5e94\u5934\u5982\u4e0b\u6240\u793a\uff1a\n<\/p>\n
\n\t\"http\n<\/p>\n
\n\t\u6dfb\u52a0\u4e86“Expires:Wed, 14 Mar 2012 09:38:32 GMT” \u548c“Cache-Control:max-age=5” \u8868\u793a\u5141\u8bb8\u5ba2\u6237\u7aef\u7f13\u5b585\u79d2\uff0c\u5f53\u4f60\u70b9“this”\u94fe\u63a5\u65f6\uff0c\u4f1a\u53d1\u73b0\u5982\u4e0b\uff1a\n<\/p>\n
\n\t\"\u6d4f\u89c8\u5668\n<\/p>\n
\n\t\u800c\u4e14\u670d\u52a1\u5668\u4e5f\u6ca1\u6709\u6536\u5230\u8bf7\u6c42\uff0c\u5f53\u8fc7\u4e865\u79d2\u540e\uff0c\u4f60\u518d\u70b9“this”\u94fe\u63a5\u4f1a\u53d1\u73b0\u53c8\u91cd\u65b0\u8bf7\u6c42\u670d\u52a1\u5668\u4e0b\u8f7d\u65b0\u6570\u636e\u3002\n<\/p>\n
\n\t\u6ce8\uff1a\u4e0b\u9762\u63d0\u5230\u4e00\u4e9b\u5173\u4e8e\u7f13\u5b58\u63a7\u5236\u7684\u4e00\u4e9b\u7279\u6b8a\u60c5\u51b5\uff1a\n<\/p>\n
    \n
  1. \n\t\t\u5bf9\u4e8e\u4e00\u822c\u7684\u9875\u9762\u8df3\u8f6c\uff08\u5982\u8d85\u94fe\u63a5\u70b9\u51fb\u8df3\u8f6c\u3001\u901a\u8fc7js\u8c03\u7528window.open\u6253\u5f00\u65b0\u9875\u9762\u90fd\u662f\u4f1a\u4f7f\u7528\u6d4f\u89c8\u5668\u7f13\u5b58\u7684\uff0c\u5728\u672a\u8fc7\u671f\u60c5\u51b5\u4e0b\u4f1a\u76f4\u63a5\u4f7f\u7528\u6d4f\u89c8\u5668\u7f13\u5b58\u7684\u526f\u672c\uff0c\u5728\u672a\u8fc7\u671f\u60c5\u51b5\u4e0b\u4e00\u6b21\u8bf7\u6c42\u4e5f\u4e0d\u53d1\u9001\uff09\uff1b\n\t<\/li>\n
  2. \n\t\t\u5bf9\u4e8e\u5237\u65b0\u9875\u9762\uff08\u5982\u6309F5\u952e\u5237\u65b0\uff09\uff0c\u4f1a\u518d\u6b21\u53d1\u9001\u4e00\u6b21\u8bf7\u6c42\u5230\u670d\u52a1\u5668\u7684\uff1b\n\t<\/li>\n<\/ol>\n
    \n\t\u4e0d\u7f13\u5b58\uff0ccacheSeconds=0
    \n<\/h2>\n
    \r\n<!— \u5728chapter4-servlet.xml\u914d\u7f6e\u5904\u7406\u5668 -->\r\n<bean name="\/helloNoCache"\r\n\tclass="com.xttblog.web.controller.HelloWorldCacheController">\r\n\t<property name="cacheSeconds" value="0"\/>\r\n<\/bean><\/pre>\n
    \n\t\u4ee5\u4e0a\u914d\u7f6e\u4f1a\u8981\u6c42\u6d4f\u89c8\u5668\u6bcf\u6b21\u90fd\u53bb\u8bf7\u6c42\u670d\u52a1\u5668\u4e0b\u8f7d\u6700\u65b0\u7684\u6570\u636e\uff1a\n<\/p>\n
    \n\t\"\u6d4f\u89c8\u5668\n<\/p>\n
    \n\tcacheSeconds<0\uff0c\u5c06\u4e0d\u6dfb\u52a0\u4efb\u4f55\u6570\u636e
    \n<\/h2>\n
    \n\t\u54cd\u5e94\u5934\u4ec0\u4e48\u7f13\u5b58\u63a7\u5236\u4fe1\u606f\u4e5f\u4e0d\u52a0\u3002\n<\/p>\n
    \n\tLast-Modified\u7f13\u5b58\u673a\u5236
    \n<\/h2>\n
      \n
    • \n\t\t\u5728\u5ba2\u6237\u7aef\u7b2c\u4e00\u6b21\u8f93\u5165url\u65f6\uff0c\u670d\u52a1\u5668\u7aef\u4f1a\u8fd4\u56de\u5185\u5bb9\u548c\u72b6\u6001\u7801200\u8868\u793a\u8bf7\u6c42\u6210\u529f\u5e76\u8fd4\u56de\u4e86\u5185\u5bb9\uff1b\u540c\u65f6\u4f1a\u6dfb\u52a0\u4e00\u4e2a“Last-Modified”\u7684\u54cd\u5e94\u5934\u8868\u793a\u6b64\u6587\u4ef6\u5728\u670d\u52a1\u5668\u4e0a\u7684\u6700\u540e\u66f4\u65b0\u65f6\u95f4\uff0c\u5982“Last-Modified:Wed, 14 Mar 2012 10:22:42 GMT”\u8868\u793a\u6700\u540e\u66f4\u65b0\u65f6\u95f4\u4e3a\uff082012-03-14 10\uff1a22\uff09\uff1b\n\t<\/li>\n
    • \n\t\t\u5ba2\u6237\u7aef\u7b2c\u4e8c\u6b21\u8bf7\u6c42\u6b64URL\u65f6\uff0c\u5ba2\u6237\u7aef\u4f1a\u5411\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u5934 “If-Modified-Since”\uff0c\u8be2\u95ee\u670d\u52a1\u5668\u8be5\u65f6\u95f4\u4e4b\u540e\u5f53\u524d\u8bf7\u6c42\u5185\u5bb9\u662f\u5426\u6709\u88ab\u4fee\u6539\u8fc7\uff0c\u5982“If-Modified-Since: Wed, 14 Mar 2012 10:22:42 GMT”\uff0c\u5982\u679c\u670d\u52a1\u5668\u7aef\u7684\u5185\u5bb9\u6ca1\u6709\u53d8\u5316\uff0c\u5219\u81ea\u52a8\u8fd4\u56de HTTP 304\u72b6\u6001\u7801\uff08\u53ea\u8981\u54cd\u5e94\u5934\uff0c\u5185\u5bb9\u4e3a\u7a7a\uff0c\u8fd9\u6837\u5c31\u8282\u7701\u4e86\u7f51\u7edc\u5e26\u5bbd\uff09\u3002\n\t<\/li>\n<\/ul>\n
      \n\t\u5ba2\u6237\u7aef\u5f3a\u5236\u7f13\u5b58\u8fc7\u671f
      \n<\/h2>\n