{"id":2529,"date":"2022-12-13T13:38:11","date_gmt":"2022-12-13T05:38:11","guid":{"rendered":"https:\/\/qaqaq.top\/?p=2529"},"modified":"2022-12-19T20:47:35","modified_gmt":"2022-12-19T12:47:35","slug":"session-%e4%bb%80%e4%b9%88%e6%98%afsession%e3%80%81session-session%e7%9a%84%e5%88%9b%e5%bb%ba%e5%92%8c%e8%8e%b7%e5%8f%96%e3%80%81session%e5%9f%9f%e4%b8%ad%e6%95%b0%e6%8d%ae%e7%9a%84%e5%ad%98%e5%8f%96","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=2529","title":{"rendered":"Session-\u4ec0\u4e48\u662fSession\u3001Session\u7684\u521b\u5efa\u548c\u83b7\u53d6\u3001Session\u57df\u4e2d\u6570\u636e\u7684\u5b58\u53d6\u3001Session\u8d85\u65f6\u7684\u63a7\u5236\u3001\u6d4f\u89c8\u5668\u548cSession\u4e4b\u95f4\u5173\u8054\u7684\u6280\u672f\u5185\u5e55"},"content":{"rendered":"\n

2\u3001Session \u4f1a\u8bdd<\/h1>\n\n\n\n

i) \u4ec0\u4e48\u662f Session \u4f1a\u8bdd?<\/h2>\n\n\n\n

1\u3001Session \u5c31\u4e00\u4e2a\u63a5\u53e3\uff08HttpSession\uff09\u3002
2\u3001Session \u5c31\u662f\u4f1a\u8bdd\u3002\u5b83\u662f\u7528\u6765\u7ef4\u62a4\u4e00\u4e2a\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u5173\u8054\u7684\u4e00\u79cd\u6280\u672f\u3002
3\u3001\u6bcf\u4e2a\u5ba2\u6237\u7aef\u90fd\u6709\u81ea\u5df1\u7684\u4e00\u4e2a Session \u4f1a\u8bdd\u3002
4\u3001Session \u4f1a\u8bdd\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u7528\u6765\u4fdd\u5b58\u7528\u6237\u767b\u5f55\u4e4b\u540e\u7684\u4fe1\u606f\u3002<\/p>\n\n\n\n

j) \u5982\u4f55\u521b\u5efa Session \u548c\u83b7\u53d6(id \u53f7,\u662f\u5426\u4e3a\u65b0)<\/h2>\n\n\n\n

\u5982\u4f55\u521b\u5efa\u548c\u83b7\u53d6 Session\u3002\u5b83\u4eec\u7684 API \u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n

request.getSession()
\u7b2c\u4e00\u6b21\u8c03\u7528\u662f\uff1a\u521b\u5efa Session \u4f1a\u8bdd
\u4e4b\u540e\u8c03\u7528\u90fd\u662f\uff1a\u83b7\u53d6\u524d\u9762\u521b\u5efa\u597d\u7684 Session \u4f1a\u8bdd\u5bf9\u8c61\u3002<\/p>\n\n\n\n

isNew(); \u5224\u65ad\u5230\u5e95\u662f\u4e0d\u662f\u521a\u521b\u5efa\u51fa\u6765\u7684\uff08\u65b0\u7684\uff09
true \u8868\u793a\u521a\u521b\u5efa
false \u8868\u793a\u83b7\u53d6\u4e4b\u524d\u521b\u5efa<\/p>\n\n\n\n

\u6bcf\u4e2a\u4f1a\u8bdd\u90fd\u6709\u4e00\u4e2a\u8eab\u4efd\u8bc1\u53f7\u3002\u4e5f\u5c31\u662f ID \u503c\u3002\u800c\u4e14\u8fd9\u4e2a ID \u662f\u552f\u4e00\u7684\u3002
getId() \u5f97\u5230 Session \u7684\u4f1a\u8bdd id \u503c\u3002<\/p>\n\n\n\n

    protected void createOrGetSession(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n        \/\/ \u521b\u5efa\u548c\u83b7\u53d6session\u4f1a\u8bdd\u5bf9\u8c61\n        HttpSession session = req.getSession();\n        \/\/ \u5224\u65ad \u5f53\u524dsession\u4f1a\u8bdd\uff0c\u662f\u5426\u662f\u65b0\u521b\u5efa\u51fa\u6765\u7684\n        boolean isNew = session.isNew();\n        \/\/ \u83b7\u53d6Session\u4f1a\u8bdd\u7684\u552f\u4e00\u6807\u8bc6 id\n        String id = session.getId();\n\n        resp.getWriter().write(\"\u5f97\u5230\u7684Session\uff0c\u5b83\u7684id\u662f\uff1a\" + id + \"<br\/>\");\n        resp.getWriter().write(\"\u8fd9\u4e2aSession\u662f\u5426\u662f\u65b0\u521b\u5efa\u7684\uff1a\" + isNew + \"<br\/>\");\n    }<\/code><\/pre>\n\n\n\n
k)Session \u57df\u6570\u636e\u7684\u5b58\u53d6<\/h2>\n\n\n\n
    \/**\n     * \u5f80Session\u4e2d\u4fdd\u5b58\u6570\u636e\n     * @param req\n     * @param resp\n     * @throws ServletException\n     * @throws IOException\n     *\/\n    protected void setAttribute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n        req.getSession().setAttribute(\"key1\",\"value1\");\n        resp.getWriter().write(\"\u5df2\u7ecf\u5f80Session\u4e2d\u4fdd\u5b58\u4e86\u6570\u636e\");\n    }\n\n    \/**\n     * \u83b7\u53d6Session\u57df\u4e2d\u7684\u6570\u636e\n     * @param req\n     * @param resp\n     * @throws ServletException\n     * @throws IOException\n     *\/\n    protected void getAttribute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n        Object attribute = req.getSession().getAttribute(\"key1\");\n        resp.getWriter().write(\"\u4eceSession\u4e2d\u83b7\u53d6\u51fakey1\u7684\u6570\u636e\u662f\uff1a\" + attribute);\n    }<\/code><\/pre>\n\n\n\n
l) Session \u751f\u547d\u5468\u671f\u63a7\u5236<\/h2>\n\n\n\n
public void setMaxInactiveInterval(int interval) \u8bbe\u7f6e Session \u7684\u8d85\u65f6\u65f6\u95f4\uff08\u4ee5\u79d2\u4e3a\u5355\u4f4d\uff09\uff0c\u8d85\u8fc7\u6307\u5b9a\u7684\u65f6\u957f\uff0cSession\u5c31\u4f1a\u88ab\u9500\u6bc1\u3002<\/p>\n\n\n\n
\u503c\u4e3a\u6b63\u6570\u7684\u65f6\u5019\uff0c\u8bbe\u5b9a Session \u7684\u8d85\u65f6\u65f6\u957f\u3002
\u8d1f\u6570\u8868\u793a\u6c38\u4e0d\u8d85\u65f6\uff08\u6781\u5c11\u4f7f\u7528\uff09<\/p>\n\n\n\n
public int getMaxInactiveInterval()\u83b7\u53d6 Session \u7684\u8d85\u65f6\u65f6\u95f4<\/p>\n\n\n\n
public void invalidate() \u8ba9\u5f53\u524d Session \u4f1a\u8bdd\u9a6c\u4e0a\u8d85\u65f6\u65e0\u6548\u3002<\/p>\n\n\n\n
Session \u9ed8\u8ba4\u7684\u8d85\u65f6\u65f6\u957f\u662f\u591a\u5c11\uff01<\/h3>\n\n\n\n
Session \u9ed8\u8ba4\u7684\u8d85\u65f6\u65f6\u95f4\u957f\u4e3a 30 \u5206\u949f\u3002
\u56e0\u4e3a\u5728 Tomcat \u670d\u52a1\u5668\u7684\u914d\u7f6e\u6587\u4ef6 web.xml\u4e2d\u9ed8\u8ba4\u6709\u4ee5\u4e0b\u7684\u914d\u7f6e\uff0c\u5b83\u5c31\u8868\u793a\u914d\u7f6e\u4e86\u5f53\u524d Tomcat \u670d\u52a1\u5668\u4e0b\u6240\u6709\u7684 Session\u8d85\u65f6\u914d\u7f6e\u9ed8\u8ba4\u65f6\u957f\u4e3a\uff1a30 \u5206\u949f\u3002<\/p>\n\n\n\n
<session-config>\n<session-timeout>30<\/session-timeout>\n<\/session-config><\/code><\/pre>\n\n\n\n
\u5982\u679c\u8bf4\u3002\u4f60\u5e0c\u671b\u4f60\u7684 web \u5de5\u7a0b\uff0c\u9ed8\u8ba4\u7684 Session \u7684\u8d85\u65f6\u65f6\u957f\u4e3a\u5176\u4ed6\u65f6\u957f\u3002\u4f60\u53ef\u4ee5\u5728\u4f60\u81ea\u5df1\u7684 web.xml \u914d\u7f6e\u6587\u4ef6\u4e2d\u505a\u4ee5\u4e0a\u76f8\u540c\u7684\u914d\u7f6e\u3002\u5c31\u53ef\u4ee5\u4fee\u6539\u4f60\u7684 web \u5de5\u7a0b\u6240\u6709 Seession \u7684\u9ed8\u8ba4\u8d85\u65f6\u65f6\u957f\u3002<\/p>\n\n\n\n
    <!-- \u8868\u793a\u5f53\u524dweb\u5de5\u7a0b\u3002\u521b\u5efa\u51fa\u6765 \u7684\u6240\u6709Session\u9ed8\u8ba4\u662f20\u5206\u949f \u8d85\u65f6\u65f6\u957f -->\n    <session-config>\n        <session-timeout>20<\/session-timeout>\n    <\/session-config><\/code><\/pre>\n\n\n\n
\u5982\u679c\u4f60\u60f3\u53ea\u4fee\u6539\u4e2a\u522b Session \u7684\u8d85\u65f6\u65f6\u957f\u3002\u5c31\u53ef\u4ee5\u4f7f\u7528\u4e0a\u9762\u7684 API\u3002setMaxInactiveInterval(int interval)\u6765\u8fdb\u884c\u5355\u72ec\u7684\u8bbe\u7f6e\u3002<\/p>\n\n\n\n
session.setMaxInactiveInterval(int interval)\u5355\u72ec\u8bbe\u7f6e\u8d85\u65f6\u65f6\u957f\u3002<\/p>\n\n\n\n
Session \u8d85\u65f6\u7684\u6982\u5ff5\u4ecb\u7ecd\uff1a<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n\n\n\n
    protected void life3(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n        \/\/ \u5148\u83b7\u53d6Session\u5bf9\u8c61\n        HttpSession session = req.getSession();\n        \/\/ \u8bbe\u7f6e\u5f53\u524dSession 3\u79d2\u540e\u8d85\u65f6\n        session.setMaxInactiveInterval(3);\n\n        resp.getWriter().write(\"\u5f53\u524dSession\u5df2\u7ecf\u8bbe\u7f6e\u4e3a3\u79d2\u540e\u8d85\u65f6\");\n    }\n\n    protected void defalutLife(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n        \/\/ \u83b7\u53d6\u4e86Session\u7684\u9ed8\u8ba4\u8d85\u65f6\u65f6\u957f\n        int maxInactiveInterval = req.getSession().getMaxInactiveInterval();\n\n        resp.getWriter().write(\"Session\u7684\u9ed8\u8ba4\u8d85\u65f6\u65f6\u957f\u4e3a\" + maxInactiveInterval + \"\u79d2\");\n    }<\/code><\/pre>\n\n\n\n
Session \u9a6c\u4e0a\u88ab\u8d85\u65f6\u793a\u4f8b\uff1a<\/p>\n\n\n\n
    protected void deleteNow(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {\n        \/\/ \u5148\u83b7\u53d6Session\u5bf9\u8c61\n        HttpSession session = req.getSession();\n        \/\/ \u8ba9Session\u4f1a\u8bdd\u9a6c\u4e0a\u8d85\u65f6\n        session.invalidate();\n\n        resp.getWriter().write(\"Session\u5df2\u7ecf\u8bbe\u7f6e\u4e3a\u8d85\u65f6\uff08\u65e0\u6548\uff09\");\n\n    }<\/code><\/pre>\n\n\n\n
session.html<\/h2>\n\n\n\n
<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.01 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/html4\/loose.dtd\">\n<html>\n<head>\n<meta http-equiv=\"pragma\" content=\"no-cache\" \/>\n<meta http-equiv=\"cache-control\" content=\"no-cache\" \/>\n<meta http-equiv=\"Expires\" content=\"0\" \/>\n<meta http-equiv=\"Content-Type\" content=\"text\/html; charset=UTF-8\">\n<title>Session<\/title>\n\t<base href=\"http:\/\/localhost:8080\/JavaWeb_Code_Session\/\" \/>\n<style type=\"text\/css\">\n\n\tul li {\n\t\tlist-style: none;\n\t}\n\t\n<\/style>\n<\/head>\n<body>\n\t<iframe name=\"target\" width=\"500\" height=\"500\" style=\"float: left;\"><\/iframe>\n\t<div style=\"float: left;\">\n\t\t<ul>\n\t\t\t<li><a href=\"sessionServlet?action=createOrGetSession\" target=\"target\">Session\u7684\u521b\u5efa\u548c\u83b7\u53d6\uff08id\u53f7\u3001\u662f\u5426\u4e3a\u65b0\u521b\u5efa\uff09<\/a><\/li>\n\t\t\t<li><a href=\"sessionServlet?action=setAttribute\" target=\"target\">Session\u57df\u6570\u636e\u7684\u5b58\u50a8<\/a><\/li>\n\t\t\t<li><a href=\"sessionServlet?action=getAttribute\" target=\"target\">Session\u57df\u6570\u636e\u7684\u83b7\u53d6<\/a><\/li>\n\t\t\t<li>Session\u7684\u5b58\u6d3b<\/li>\n\t\t\t<li>\n\t\t\t\t<ul>\n\t\t\t\t\t<li><a href=\"sessionServlet?action=defalutLife\" target=\"target\">Session\u7684\u9ed8\u8ba4\u8d85\u65f6\u53ca\u914d\u7f6e<\/a><\/li>\n\t\t\t\t\t<li><a href=\"sessionServlet?action=life3\" target=\"target\">Session3\u79d2\u8d85\u65f6\u9500\u6bc1<\/a><\/li>\n\t\t\t\t\t<li><a href=\"sessionServlet?action=deleteNow\" target=\"target\">Session\u9a6c\u4e0a\u9500\u6bc1<\/a><\/li>\n\t\t\t\t<\/ul>\n\t\t\t<\/li>\n\t\t\t<li><a href=\"\" target=\"target\">\u6d4f\u89c8\u5668\u548cSession\u7ed1\u5b9a\u7684\u539f\u7406<\/a><\/li>\n\t\t<\/ul>\n\t<\/div>\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
m) \u6d4f\u89c8\u5668\u548c Session \u4e4b\u95f4\u5173\u8054\u7684\u6280\u672f\u5185\u5e55<\/h2>\n\n\n\n
Session \u6280\u672f\uff0c\u5e95\u5c42\u5176\u5b9e\u662f\u57fa\u4e8e Cookie \u6280\u672f\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
2\u3001Session \u4f1a\u8bdd i) \u4ec0\u4e48\u662f Session \u4f1a\u8bdd? 1\u3001Session \u5c31\u4e00\u4e2a\u63a5\u53e3\uff08HttpSes […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[59],"tags":[61],"class_list":["post-2529","post","type-post","status-publish","format-standard","hentry","category-javaweb-code","tag-javaweb"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2529"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2529"}],"version-history":[{"count":3,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2529\/revisions"}],"predecessor-version":[{"id":2722,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/2529\/revisions\/2722"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2529"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}