基于Spring JdbcTemplate 的分页处理

传统的基于B/S的应用中，Session会话超时后通常是跳转到应用的首页，但Ajax请求的处理方式有些不同，下面简单介绍一下Ajax请求的Session超时处理(超时后返回首页)

1.首先创建一个Filter

[java] view plain copy

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;
// 判断session里是否有用户信息
if (req.getSession().getAttribute("SPRING_SECURITY_CONTEXT") == 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(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] view plain copy

<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.设置Ajax调用全局参数

[javascript] view plain copy

posted on 2012-10-23 15:41 你爸是李刚阅读(1426) 评论(2) 编辑收藏

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