傳統的基於B/S的應用中,Session會話超時後通常是跳轉到應用的首頁,但Ajax請求的處理方式有些不同,下面簡單介紹一下Ajax請求的Session超時處理(超時後返回首頁)
1.首先創建一個Filter
[java]
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 AjaxSessionTimeoutFilter 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;
// 判斷session裡是否有用戶信息
if (req.getSession().getAttribute("SPRING_SECURITY_CONTEXT") == null){
// 如果是ajax請求響應頭會有,x-requested-with;
if (req.getHeader("x-requested-with") != null && req.getHeader("x-requested-with").equalsIgnoreCase("XMLHttpRequest")){
res.setStatus(911);//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中增加以下配置
[html]
<filter>
<filter-name>ajaxSessionTimeout</filter-name>
<filter-class>org.tshark.framework.web.filter.AjaxSessionTimeoutFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>ajaxSessionTimeout</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
3.設置Ajax調用全局參數
[javascript]
$.ajaxSetup({
contentType : "application/x-www-form-urlencoded;charset=utf-8",
complete : function(xhr, textStatus) {
$.ts.hideLoading();
//session timeout
if (xhr.status == 911) {
window.location = rootPath + "/";//返回應用首頁
return;
}
}
});