web前端js代码:
$.ajaxSetup({ contentType : "application/x-www-form-urlencoded;charset=utf-8", complete : function(xhr, textStatus) { if (xhr.status == 520) {//如果返回状态码是520 window.location..reload();//刷新页面,执行登录逻辑 return; } } });
java代码:
1. 写一个filter
import java.io.IOException; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class SessionTimeoutFilter implements Filter { public void destroy() { } public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest req = (HttpServletRequest) request; HttpServletResponse res = (HttpServletResponse) response; // 判断session里是否有用户信息 if (req.getSession().getAttribute("username") == null){ // 如果是ajax请求响应头会有,x-requested-with; if (req.getHeader("x-requested-with") != null && req.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")){ res.setStatus(520);//表示session timeout }else{ chain.doFilter(req, res); } }else{ chain.doFilter(req, res); } } public void init(FilterConfig chain) throws ServletException { } }
2. 在web.xml中添加上面的filter
<filter> <filter-name>ajaxSessionTimeout</filter-name> <filter-class>org.tshark.framework.web.filter.SessionTimeoutFilter</filter-class> </filter> <filter-mapping> <filter-name>ajaxSessionTimeout</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
Ajax请求Session超时解决
时间: 2024-10-12 20:28:31