springMVC 长时间未操作（session过期）

比眉伴天荒 2021-09-15 13:02 592阅读 0赞

# web.xml配置过滤器 #

<filter>
    	    <filter-name>timoutFilter</filter-name>
    	    <filter-class>com.ssm.filter.SessionFilter</filter-class>
    	  </filter>
    	  <filter-mapping>
    	    <filter-name>timoutFilter</filter-name>
    	    <url-pattern>/*</url-pattern>
    	  </filter-mapping>
    	  <session-config>
    	  	<session-timeout>1</session-timeout>
    	  </session-config>

# 建filter类 #

package com.ssm.filter;
    import java.io.IOException;
    import java.io.PrintWriter;
    
    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 SessionFilter implements Filter{
    
    	@Override
    	public void destroy() {
    		// TODO Auto-generated method stub
    	}
    
    	@Override
    	public void doFilter(ServletRequest arg0, ServletResponse arg1,
    			FilterChain chain) throws IOException, ServletException {
    		HttpServletRequest httpRequest = (HttpServletRequest) arg0;
    		HttpServletResponse httpResponse = (HttpServletResponse) arg1;
    		String loginUrl = httpRequest.getContextPath() + "/index";
    		
    		String url = httpRequest.getRequestURI();
    		if (!url.contains("index") && httpRequest.getSession(false) == null) {//index是我的登录页的路径
    			String str = "<script language='javascript'>alert('会话过期,请重新登录');"
    					+ "window.top.location.href='"
    					+ loginUrl
    					+ "';</script>";
    			httpResponse.setContentType("text/html;charset=UTF-8");// 解决中文乱码
    			PrintWriter writer = httpResponse.getWriter();
    			writer.write(str);
    			writer.flush();
    			return;
    		}
    		chain.doFilter(httpRequest, httpResponse);
    	}
    
    	@Override
    	public void init(FilterConfig arg0) throws ServletException {
    		// TODO Auto-generated method stub
    	}
    
    }

# 如果是ajax（经常用到） #

$.ajax({
                            url: "${basePath}/ssm/DeleteWorkLog",
                            type: "POST",
                            dataType: "text",
                            data: {'logid':$("#NewWorkLogID").val()},
                            success: function (jsonResult) {
                                if(jsonResult=="fail"){
                                	layer.msg('删除失败', {icon: 2}); 
                                }
                                else if(jsonResult=="success"){
                                    layer.msg('删除成功', {icon: 1}); 
                                    RefreshWorkLogList();
                                    NewWorkLog();
                                }
                                else{
                                	document.write(jsonResult);//当session过期时，data即为filter中返回的请求  
                                }
                            },
                            error: function (x, e) {
                                alert('NG');
                            }