com.jsj.filter====新闻发布系统（7）

2020-05-15

这个是拦截器，可以看做保安

com.jsj.filter

AdminFilter

 1 package com.jsj.filter;
 2 
 3 import javax.servlet.*;
 4 import javax.servlet.annotation.WebFilter;
 5 import javax.servlet.http.HttpServletRequest;
 6 import javax.servlet.http.HttpServletResponse;
 7 import java.io.IOException;
 8 
 9 /**
10  * 管理员认证拦截
11  */
12 @WebFilter(urlPatterns = "/admin/manage/*")
13 public class AdminFilter implements Filter {
14 
15     @Override
16     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
17         HttpServletRequest request = (HttpServletRequest) servletRequest;
18         HttpServletResponse response = (HttpServletResponse) servletResponse;
19         if (request.getSession().getAttribute("adminStatus")!=null&& (boolean) request.getSession().getAttribute("adminStatus"))
20             filterChain.doFilter(servletRequest, servletResponse);
21         else {
22             response.setContentType("text/html;charset=UTF-8");
23             response.getWriter().println("您不是管理员，无权访问该资源！请进行<a href='/admin'>管理员登录</a>");
24         }
25     }
26 
27 }

View Code

CharterEncodingFilter

 1 package com.jsj.filter;
 2 
 3 import javax.servlet.*;
 4 import javax.servlet.annotation.WebFilter;
 5 import javax.servlet.annotation.WebInitParam;
 6 import javax.servlet.http.HttpServletRequest;
 7 import java.io.IOException;
 8 
 9 /**
10  * 请求编码过滤器
11  */
12 @WebFilter(urlPatterns = "/*",initParams = { @WebInitParam(name = "CharacterEncoding", value = "UTF-8")})
13 public class CharacterEncodingFilter implements Filter {
14 
15     private String characterEncoding;
16 
17     @Override
18     public void init(FilterConfig filterConfig) {
19         this.characterEncoding = filterConfig.getInitParameter("CharacterEncoding");
20     }
21 
22     @Override
23     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
24         HttpServletRequest request = (HttpServletRequest) servletRequest;
25         request.setCharacterEncoding(characterEncoding);
26         filterChain.doFilter(request,servletResponse);
27     }
28 }

View Code

会当凌绝顶，一览众山小