java web 过滤器登录_javaweb登录过滤器

た入场券 2022-11-06 10:49 19阅读 0赞

1.web.xml登录过滤器配置

登录过滤器

loginFilter

com.feiwei.filter.LoginFilter

loginFilter

/\*

2.LoginFilter登录过滤器实现类

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.HttpSession;

import com.feiwei.util.TipsUtil;

public class LoginFilter implements Filter\{

TipsUtil tips=new TipsUtil();

@Override

public void destroy() \{\}

@Override

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException \{

HttpServletRequest httpRequest = (HttpServletRequest) request;

HttpSession session = httpRequest.getSession();

String url=((HttpServletRequest)request).getServletPath(); if(url.endsWith("login.jsp")||url.endsWith("login.do")||

url.endsWith(".css")||url.endsWith(".js")||url.endsWith(".jpg")||url.endsWith(".png")) \{

chain.doFilter(request, response);

return;

if (session.getAttribute("username")== null) \{

tips.setSuccess(false);

tips.setMessage("登录超时或没有登录！");

tips.setUrl("/login.jsp");

request.setAttribute("tips", tips);

request.getRequestDispatcher("/tips.jsp").forward(request,response);

\} else \{

chain.doFilter(request, response);

@Override

public void init(FilterConfig arg0) throws ServletException \{\}

3.页面跳转提示类

/\*\*

页面跳转提示类

@author Administrator

\*/

public class TipsUtil \{

private boolean success; // 操作是否成功

private String title; //标题

private String message; // 提示消息

private int time =3; // 倒计时效果要几秒钟

private String url; // 重定向地址

public boolean isSuccess() \{

return success;

public void setSuccess(boolean success) \{

this.success = success;

this.title=this.success?"提示":"警告";

public String getMessage() \{

return message;

public void setMessage(String message) \{

this.message = message;

public int getTime() \{

return time;

public void setTime(int time) \{

this.time = time;

public String getUrl() \{

return url;

public void setUrl(String url) \{

this.url = url;

public String getTitle() \{

return title;

public void setTitle(String title) \{

this.title = title;

4.登录页面

pageEncoding="utf-8"%>

用户登录

请登录

java web 过滤器登录_javaweb登录过滤器

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