jsp中文乱码的问题

分两种情况：

1. GET方式

这种方法目前我只找到一种方案解决，就是利用

1 value =new String(value.getBytes("ISO8859-1"),"UTF-8");

因为JSP在传参数值时是用ISO8859-1，没办法，只能这样做。

可以选择在页面上写，也可以选择在JAVA文件处理参数值时做转换。

2. POST方式

自己写一个Filter，来设置编码。参考http://heisetoufa.iteye.com/blog/227365

 1 package edu.whu.ress.CustomFilter;
 2 
 3 import java.io.IOException;
 4 
 5 import javax.servlet.Filter;
 6 import javax.servlet.FilterChain;
 7 import javax.servlet.FilterConfig;
 8 import javax.servlet.ServletException;
 9 import javax.servlet.ServletRequest;
10 import javax.servlet.ServletResponse;
11 import javax.servlet.http.HttpServletRequest;
12 
13 public class EncodingFilter implements Filter  {
14      protected FilterConfig filterconfig;
15         private String targetEncoding = "UTF-8";
16 
17         public void init(FilterConfig config) throws ServletException {
18             this.filterconfig = config;
19             this.targetEncoding = config.getInitParameter("encoding");
20         }
21 
22         public void doFilter(ServletRequest srequest, ServletResponse sresponse,
23                 FilterChain chain) throws IOException, ServletException {
24             HttpServletRequest request = (HttpServletRequest)srequest;
25             
26             request.setCharacterEncoding(targetEncoding);
27             chain.doFilter(srequest,sresponse);
28             sresponse.setCharacterEncoding(targetEncoding);
29             
30             
31         }
32        
33         public void setFilterConfig(final FilterConfig filterConfig){
34             this.filterconfig=filterConfig;
35         }
36 
37         public void destroy() {
38             this.filterconfig = null;
39 
40         }
41 }

　　在web.xml中增加filter与filtermapping，注意，用于编码的Filter要放在Struct的FilterDispatcher前面

 1 <filter>
 2   <filter-name>characterEncoding</filter-name>
 3   <filter-class>CustomFilter.EncodingFilter</filter-class>
 4   <init-param>  
 5         <param-name>encoding</param-name>  
 6         <param-value>UTF-8</param-value>  
 7     </init-param>  
 8     <init-param>  
 9         <param-name>forceEncoding</param-name>  
10         <param-value>true</param-value>  
11     </init-param> 
12  </filter>
13 
14  <filter-mapping>
15   <filter-name>characterEncoding</filter-name>
16   <url-pattern>/*</url-pattern>
17  </filter-mapping>

这样基本就可以解决post方式中文乱码的问题。