1，新建一个servlet类，直接上代码，
1 package com.aptech.jb.filter;
2
3 import javax.servlet.Filter;
4 import javax.servlet.FilterConfig;
5 import javax.servlet.ServletException;
6 import javax.servlet.ServletRequest;
7
8 import javax.servlet.ServletResponse;
9 import javax.servlet.FilterChain;
10 import java.io.IOException;
11
12 public class SetCharacterEncodingFilter implements Filter {
13
14 protected FilterConfig filterConfig;
15 protected String encodingName;
16 protected boolean enable;
17
18 public SetCharacterEncodingFilter() {
19 this.encodingName = "GBK";
20 this.enable = false;
21 }
22
23 public void init(FilterConfig filterConfig) throws ServletException {
24 this.filterConfig = filterConfig;
25 }
26
27 public void doFilter(ServletRequest request,
28 ServletResponse response,
29 FilterChain chain)
30 throws IOException, ServletException {
31 request.setCharacterEncoding("GBK");
32 chain.doFilter(request, response);
33 }
34
35 public void destroy() {
36 }
37 }
2，在web.xml文件中配置，直接添加如下代码
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