{"id":171245,"date":"2024-05-08T17:25:02","date_gmt":"2024-05-08T09:25:02","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/171245.html"},"modified":"2024-05-08T17:25:09","modified_gmt":"2024-05-08T09:25:09","slug":"java-web-%e7%a8%8b%e5%ba%8f%e5%bc%80%e5%8f%91%e4%b8%ad%e6%80%8e%e4%b9%88%e8%87%aa%e5%ae%9a%e4%b9%89-session","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/171245.html","title":{"rendered":"Java Web \u7a0b\u5e8f\u5f00\u53d1\u4e2d\u600e\u4e48\u81ea\u5b9a\u4e49 Session"},"content":{"rendered":"

\"Java<\/p>\n

Java Web \u7a0b\u5e8f\u5f00\u53d1\u4e2d\u81ea\u5b9a\u4e49Session\u901a\u5e38\u6d89\u53ca\u5230\u521b\u5efa\u3001\u7ba1\u7406\u548c\u5b58\u50a8Session\u4fe1\u606f<\/strong>\u3002\u4e3a\u4e86\u63d0\u9ad8\u5e94\u7528\u7684\u53ef\u4f38\u7f29\u6027\u3001\u5b89\u5168\u6027\u6216\u8005\u4e3a\u4e86\u4f7f\u7528\u7279\u5b9a\u7684\u5b58\u50a8\u673a\u5236\uff0c\u5f00\u53d1\u8005\u53ef\u80fd\u4f1a\u91c7\u7528\u81ea\u5b9a\u4e49Session\u673a\u5236\u3002\u5176\u4e2d\u6bd4\u8f83\u5173\u952e\u7684\u6b65\u9aa4\u5305\u62ec\u5b9a\u4e49Session\u63a5\u53e3\u3001\u5b9e\u73b0Session\u7ba1\u7406\u5668\u3001\u786e\u4fddSession\u7684\u6301\u4e45\u5316<\/strong>\u4ee5\u53ca\u96c6\u6210\u5230Web\u6846\u67b6\u4e2d<\/strong>\u3002\u5728\u81ea\u5b9a\u4e49Session\u8fc7\u7a0b\u4e2d\uff0c\u6bcf\u4e2a\u6b65\u9aa4\u5fc5\u987b\u7cbe\u7ec6\u5904\u7406\uff0c\u4ee5\u786e\u4fdd\u6574\u4e2a\u673a\u5236\u7684\u6b63\u786e\u6027\u548c\u6027\u80fd\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u5b9a\u4e49SESSION\u63a5\u53e3<\/p>\n<\/p>\n

\u5728\u81ea\u5b9a\u4e49Session\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5b9a\u4e49\u4e00\u4e2aSession\u63a5\u53e3\uff0c\u8fd9\u4e2a\u63a5\u53e3\u5c06\u89c4\u5b9aSession\u5bf9\u8c61\u53ef\u4ee5\u63d0\u4f9b\u54ea\u4e9b\u529f\u80fd\u3002\u63a5\u53e3\u65b9\u6cd5\u901a\u5e38\u5305\u62ec\u83b7\u53d6Session ID\u3001\u5b58\u53d6\u5c5e\u6027\u3001\u9500\u6bc1Session\u7b49<\/strong>\u3002<\/p>\n<\/p>\n

public interface CustomSession {<\/p>\n
    String getSessionId();<\/p>\n
    void setAttribute(String name, Object value);<\/p>\n
    Object getAttribute(String name);<\/p>\n
    void removeAttribute(String name);<\/p>\n
    long getCreationTime();<\/p>\n
    void invalidate();<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u5b9e\u73b0SESSION\u7ba1\u7406\u5668<\/p>\n<\/p>\n
\u81ea\u5b9a\u4e49Session\u7ba1\u7406\u5668\u662f\u6574\u4e2a\u81ea\u5b9a\u4e49Session\u8fc7\u7a0b\u7684\u6838\u5fc3\u3002\u8be5\u7ba1\u7406\u5668\u8d1f\u8d23\u521b\u5efaSession\u3001\u4fdd\u5b58Session\u6570\u636e\u3001\u5b9a\u671f\u6e05\u7406\u8fc7\u671f\u7684Session\u7b49\u3002\u5173\u952e\u662f\u5982\u4f55\u9ad8\u6548\u5730\u5904\u7406\u8fd9\u4e9b\u4efb\u52a1\uff0c\u4ee5\u53ca\u4fdd\u8bc1Session\u6570\u636e\u7684\u4e00\u81f4\u6027\u548c\u5b89\u5168<\/strong>\u3002<\/p>\n<\/p>\n
public class CustomSessionManager {<\/p>\n
    private Map<String, CustomSession> sessions = new ConcurrentHashMap<>();<\/p>\n
    public CustomSession createSession() {<\/p>\n
        CustomSession session = new CustomSessionImpl(generateSessionId());<\/p>\n
        sessions.put(session.getSessionId(), session);<\/p>\n
        return session;<\/p>\n
    }<\/p>\n
    public CustomSession getSession(String sessionId) {<\/p>\n
        return sessions.get(sessionId);<\/p>\n
    }<\/p>\n
    private String generateSessionId() {<\/p>\n
        \/\/ \u5b9e\u73b0Session ID\u7684\u751f\u6210\u903b\u8f91<\/p>\n
    }<\/p>\n
    public void cleanUpExpiredSessions() {<\/p>\n
        \/\/ \u5b9e\u73b0\u6e05\u7406\u8fc7\u671fSession\u7684\u903b\u8f91<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u786e\u4fddSESSION\u7684\u6301\u4e45\u5316<\/p>\n<\/p>\n
\u4e00\u65e6Web\u5e94\u7528\u88ab\u91cd\u65b0\u542f\u52a8\uff0c\u6216\u8005\u9700\u8981\u5728\u591a\u53f0\u670d\u52a1\u5668\u4e4b\u95f4\u5171\u4eabSession\u6570\u636e\u65f6\uff0cSession\u7684\u6301\u4e45\u5316\u53d8\u5f97\u5c24\u4e3a\u91cd\u8981\u3002\u53ef\u4ee5\u9009\u62e9\u5c06Session\u6570\u636e\u5b58\u50a8\u5728\u6570\u636e\u5e93\u3001Redis\u6216\u5176\u4ed6NoSQL\u5b58\u50a8\u4e2d<\/strong>\u3002\u6301\u4e45\u5316\u673a\u5236\u9700\u8981\u80fd\u591f\u5feb\u901f\u5199\u5165\u3001\u8bfb\u53d6\uff0c\u5e76\u4e14\u4fdd\u8bc1\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<\/p>\n
public interface SessionStorage {<\/p>\n
    void save(CustomSession session);<\/p>\n
    CustomSession retrieve(String sessionId);<\/p>\n
    void delete(String sessionId);<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u96c6\u6210\u5230WEB\u6846\u67b6\u4e2d<\/p>\n<\/p>\n
\u6700\u540e\u4e00\u6b65\u662f\u5c06\u81ea\u5b9a\u4e49\u7684Session\u7ba1\u7406\u5668\u548c\u6301\u4e45\u5316\u673a\u5236\u96c6\u6210\u5230\u73b0\u6709\u7684Web\u6846\u67b6\u4e2d\u3002\u8fd9\u53ef\u80fd\u9700\u8981\u5b9e\u73b0\u7279\u5b9a\u6846\u67b6\u7684\u63d2\u4ef6\u6216\u4e2d\u95f4\u4ef6\uff0c\u4ee5\u786e\u4fdd\u6846\u67b6\u80fd\u591f\u900f\u660e\u5730\u5904\u7406\u81ea\u5b9a\u4e49\u7684Session\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
public class CustomSessionFilter implements Filter {<\/p>\n
    private CustomSessionManager sessionManager;<\/p>\n
    \/\/ \u786e\u4fddFilter\u6b63\u786e\u521d\u59cb\u5316<\/p>\n
    public void init(FilterConfig filterConfig) throws ServletException {<\/p>\n
        sessionManager = new CustomSessionManager();<\/p>\n
        \/\/ \u53ef\u80fd\u8fd8\u9700\u8981\u521d\u59cb\u5316\u6301\u4e45\u5316\u7ec4\u4ef6<\/p>\n
    }<\/p>\n
    public void doFilter(ServletRequest request, ServletResponse response, FilterChAI<\/a>n chain)<\/p>\n
            throws IOException, ServletException {<\/p>\n
        HttpServletRequest httpServletRequest = (HttpServletRequest) request;<\/p>\n
        \/\/ \u83b7\u53d6\u6216\u521b\u5efaSession<\/p>\n
        CustomSession session = getSessionFromRequest(httpServletRequest);<\/p>\n
        \/\/ \u5c06Session\u5bf9\u8c61\u7ed1\u5b9a\u5230\u8bf7\u6c42\u6216\u4e0a\u4e0b\u6587\u4e2d<\/p>\n
        request.setAttribute("customSession", session);<\/p>\n
        \/\/ \u7ee7\u7eed\u8bf7\u6c42\u5904\u7406<\/p>\n
        chain.doFilter(request, response);<\/p>\n
    }<\/p>\n
    private CustomSession getSessionFromRequest(HttpServletRequest request) {<\/p>\n
        \/\/ \u4ecerequest\u4e2d\u83b7\u53d6Session ID\uff0c\u5e76\u4eceSession\u7ba1\u7406\u5668\u4e2d\u83b7\u53d6Session\u5bf9\u8c61<\/p>\n
    }<\/p>\n
    public void destroy() {<\/p>\n
        \/\/ \u8fdb\u884c\u9002\u5f53\u7684\u8d44\u6e90\u91ca\u653e\u548c\u6e05\u7406\u5de5\u4f5c<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u6574\u4e2a\u81ea\u5b9a\u4e49Session\u7684\u5b9e\u73b0\u4e2d\uff0c\u5b89\u5168\u6027\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u73af\u8282<\/strong>\u3002\u5f00\u53d1\u8005\u9700\u8981\u786e\u4fddSession\u4e0d\u4f1a\u6613\u4e8e\u88ab\u9884\u6d4b\u6216\u7be1\u6539\uff0c\u540c\u65f6\u8fd8\u8981\u907f\u514dSession\u52ab\u6301\u7b49\u5b89\u5168\u95ee\u9898\u3002\u6b64\u5916\uff0c\u5bf9\u4e8e\u654f\u611f\u6570\u636e\uff0c\u5efa\u8bae\u52a0\u5bc6\u540e\u518d\u5b58\u50a8\uff0c\u4ee5\u514d\u76f4\u63a5\u66b4\u9732\u7ed9\u5ba2\u6237\u7aef\u7b49\u3002<\/p>\n<\/p>\n
\u6700\u540e\uff0c\u81ea\u5b9a\u4e49Session\u4e5f\u8981\u8003\u8651\u5230\u6548\u7387\u95ee\u9898\u3002\u9ad8\u6548\u5730\u8bfb\u5199Session\u6570\u636e\u3001\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6570\u636e\u4f20\u8f93\u3001\u7cbe\u7b80Session\u4e2d\u5b58\u50a8\u7684\u6570\u636e\u91cf\u3001\u51cf\u5c11\u6570\u636e\u5e93\u7684\u8bbf\u95ee\u6b21\u6570\u7b49\u90fd\u662f\u9700\u8981\u5173\u6ce8\u7684\u6027\u80fd\u4f18\u5316\u70b9\u3002\u901a\u8fc7\u4f7f\u7528\u7f13\u5b58\u3001\u8bfb\u5199\u5206\u79bb\u3001\u5f02\u6b65\u5b58\u50a8\u673a\u5236\u7b49\u65b9\u5f0f\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8Session\u7684\u5904\u7406\u6548\u7387\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. Java Web \u7a0b\u5e8f\u4e2d\u5982\u4f55\u5b9e\u73b0 Session \u7684\u81ea\u5b9a\u4e49\uff1f<\/strong>
\n\u5728Java Web\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0\u81ea\u5b9a\u4e49\u7684HttpSessionListener\u63a5\u53e3\u6765\u81ea\u5b9a\u4e49Session\u3002\u9996\u5148\uff0c\u521b\u5efa\u4e00\u4e2a\u7c7b\u5b9e\u73b0HttpSessionListener\u63a5\u53e3\uff0c\u5e76\u91cd\u5199\u5176\u76f8\u5e94\u65b9\u6cd5\u3002\u7136\u540e\uff0c\u5728web.xml\u6587\u4ef6\u4e2d\u914d\u7f6e\u8be5\u76d1\u542c\u5668\uff0c\u4f7f\u5176\u80fd\u591f\u76d1\u542cSession\u7684\u521b\u5efa\u548c\u9500\u6bc1\u4e8b\u4ef6\u3002\u5f53\u6709\u65b0\u7684Session\u521b\u5efa\u65f6\uff0c\u81ea\u5b9a\u4e49\u7684\u76d1\u542c\u5668\u5c06\u4f1a\u8c03\u7528\u76f8\u5e94\u65b9\u6cd5\u8fdb\u884c\u5904\u7406\uff0c\u53ef\u4ee5\u5728\u8fd9\u91cc\u5b9e\u73b0Session\u7684\u81ea\u5b9a\u4e49\u903b\u8f91\uff0c\u4f8b\u5982\u8bbe\u7f6eSession\u7684\u8fc7\u671f\u65f6\u95f4\u3001\u6dfb\u52a0\u989d\u5916\u7684\u5c5e\u6027\u7b49\u3002<\/p>\n
2. \u5982\u4f55\u5728Java Web\u7a0b\u5e8f\u4e2d\u83b7\u53d6\u81ea\u5b9a\u4e49Session\u7684\u5c5e\u6027\u503c\uff1f<\/strong>
\n\u5728Java Web\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7HttpSession\u7684getAttribute\u65b9\u6cd5\u6765\u83b7\u53d6Session\u4e2d\u5b58\u50a8\u7684\u81ea\u5b9a\u4e49\u7684\u5c5e\u6027\u503c\u3002\u9996\u5148\uff0c\u901a\u8fc7HttpServletRequest\u5bf9\u8c61\u7684getSession\u65b9\u6cd5\u83b7\u53d6\u5f53\u524d\u7528\u6237\u7684Session\u5bf9\u8c61\u3002\u7136\u540e\uff0c\u8c03\u7528getAttribute\u65b9\u6cd5\uff0c\u5e76\u4f20\u5165\u5c5e\u6027\u7684\u540d\u79f0\uff0c\u5373\u53ef\u83b7\u53d6\u5230\u5bf9\u5e94\u7684\u5c5e\u6027\u503c\u3002\u5982\u679c\u5c5e\u6027\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56denull\u3002\u53ef\u4ee5\u6839\u636e\u9700\u8981\uff0c\u5bf9\u83b7\u53d6\u5230\u7684\u5c5e\u6027\u503c\u8fdb\u884c\u76f8\u5e94\u5904\u7406\u6216\u8005\u5224\u65ad\u3002<\/p>\n
3. \u5982\u4f55\u5728Java Web\u7a0b\u5e8f\u4e2d\u81ea\u5b9a\u4e49Session\u7684\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\uff1f<\/strong>
\n\u5728Java Web\u7a0b\u5e8f\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6eweb.xml\u6587\u4ef6\u4e2d\u7684session-config\u5143\u7d20\u6765\u81ea\u5b9a\u4e49Session\u7684\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u3002\u5728session-config\u5143\u7d20\u4e2d\uff0c\u53ef\u4ee5\u8bbe\u7f6esession-timeout\u7684\u503c\uff0c\u4ee5\u5206\u949f\u4e3a\u5355\u4f4d\uff0c\u8868\u793aSession\u7684\u8d85\u65f6\u65f6\u95f4\u3002\u4f8b\u5982\uff0c\u8bbe\u7f6e\u4e3a30\u8868\u793aSession\u572830\u5206\u949f\u5185\u6ca1\u6709\u88ab\u8bbf\u95ee\u65f6\u5c06\u4f1a\u88ab\u9500\u6bc1\u3002\u53ef\u4ee5\u6839\u636e\u9700\u6c42\uff0c\u5c06\u4f1a\u8bdd\u8d85\u65f6\u65f6\u95f4\u8bbe\u7f6e\u4e3a\u9002\u5f53\u7684\u503c\uff0c\u4ee5\u4fdd\u8bc1\u7528\u6237\u7684\u4f1a\u8bdd\u4e0d\u4f1a\u8fc7\u65e9\u5931\u6548\uff0c\u4e5f\u4e0d\u4f1a\u8fc7\u957f\u65f6\u95f4\u5360\u7528\u670d\u52a1\u5668\u8d44\u6e90\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Java Web \u7a0b\u5e8f\u5f00\u53d1\u4e2d\u81ea\u5b9a\u4e49Session\u901a\u5e38\u6d89\u53ca\u5230\u521b\u5efa\u3001\u7ba1\u7406\u548c\u5b58\u50a8Session\u4fe1\u606f\u3002\u4e3a\u4e86\u63d0\u9ad8\u5e94\u7528\u7684\u53ef […]","protected":false},"author":3,"featured_media":171252,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/171245"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=171245"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/171245\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/171252"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=171245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=171245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=171245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}