getSession（）始终创建一个新会话 [英] getSession() always creates a new session

问题描述

我们的应用程序中通过实现Filter来安装SecurityFilter类，我们的doFilter方法如下所示。

We have SecurityFilter class in our application by implementing Filter and our doFilter method looks like this.

public void doFilter(ServletRequest sres, ServletResponse sreq,
            FilterChain chain) throws IOException, ServletException {

        LOGGER.debug(Logger.buildLogMessage("Starting SecurityFilter.doFilter"));
        HttpServletRequest request = (HttpServletRequest) sres;
        HttpServletResponse response = (HttpServletResponse) sreq;

        HttpSession session = request.getSession();

我们的web.xml中有以下条目

We have the following entry in our web.xml

<filter>
        <filter-name>SecurityFilter</filter-name>
        <filter-class>com.a.b.c.web.filter.SecurityFilter</filter-class>
</filter>

<filter-mapping>
        <filter-name>SecurityFilter</filter-name>
        <url-pattern>/resources/*</url-pattern>
</filter-mapping>

我们对应用程序进行了很多REST调用，所有这些调用都通过了这个过滤器。 Java API文档说，request.getSession（）返回会话（如果存在），否则会创建新会话。但是在我们的应用程序中，request.getSession（）总是为每个REST调用创建一个新会话。这可能会出错？

We have many REST calls to our application and all of them pass through this filter. The Java API documentation says, the request.getSession() returns a session if exists else it creates a new session. But in our application the request.getSession() always creates a new session for every REST call. What could be going wrong here ?

推荐答案

如果您的应用程序设置设置为通过cookie跟踪JSESSIONID，则应用程序将返回相同的会话如果您是从其他浏览器发出请求，请从同一浏览器请求，以及新会话。这显然是因为cookie基于每个浏览器生存。

If your application settings are set to track JSESSIONID via cookie, the application will return the same session if you're making a request from the same browser, and a new session if you're making a request from a different browser. This is obviously because cookies live on a per-browser basis.

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