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   

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

  

package edu.whu.ress.CustomFilter;

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;

public class EncodingFilter implements Filter  {
     protected FilterConfig filterconfig;
        private String targetEncoding = "UTF-8";

        public void init(FilterConfig config) throws ServletException {
            this.filterconfig = config;
            this.targetEncoding = config.getInitParameter("encoding");
        }

        public void doFilter(ServletRequest srequest, ServletResponse sresponse,
                FilterChain chain) throws IOException, ServletException {
            HttpServletRequest request = (HttpServletRequest)srequest;
            
            request.setCharacterEncoding(targetEncoding);
            chain.doFilter(srequest,sresponse);
            sresponse.setCharacterEncoding(targetEncoding);
            
            
        }
       
        public void setFilterConfig(final FilterConfig filterConfig){
            this.filterconfig=filterConfig;
        }

        public void destroy() {
            this.filterconfig = null;

        }
}

　　 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

<filter>
  <filter-name>characterEncoding</filter-name>
  <filter-class>CustomFilter.EncodingFilter</filter-class>
  <init-param>  
        <param-name>encoding</param-name>  
        <param-value>UTF-8</param-value>  
    </init-param>  
    <init-param>  
        <param-name>forceEncoding</param-name>  
        <param-value>true</param-value>  
    </init-param> 
 </filter>

 <filter-mapping>
  <filter-name>characterEncoding</filter-name>
  <url-pattern>/*</url-pattern>
 </filter-mapping>

这样基本就可以解决post方式中文乱码的问题。