关于Struts里提交中文表单到ActionForm后的乱码问题

由于Struts框架直接把表单数据发送给了ActionForm，所以这里面没有对HttpRequestServlet进行SetCharacterEncoding,所以默认是按照ISO-8859-1(参见Tomcat 源代码中的org.apache.catalina.connector.HttpRequestBase中的protected void parseParameters()方法)，

解决的方法，就是在表单提交到ActionForm之前对request进行编码。
第一种方法，就是写一个过滤器，对所有请求进行过滤

---

过滤器代码：
package jp.co.ricoh.gtis.others.profile.filters;

 

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;

public class SetCharacterEncodingFilter implements Filter {
 private String encoding;
 public void init(FilterConfig filterConfig) throws ServletException {
  // TODO Auto-generated method stub
  this.encoding=filterConfig.getInitParameter("encoding");
 }

 public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain chain) throws IOException, ServletException {
  // TODO Auto-generated method stub
  request.setCharacterEncoding(this.encoding);
  chain.doFilter(request,response);
 }

 public void destroy() {
  // TODO Auto-generated method stub

 }

}

---

 

配置文件web.xml
 
   SetCharacterEncodingFilter
   jp.co.ricoh.gtis.others.profile.filters.SetCharacterEncodingFilter
  
    encoding
    utf-8
  
 

  
   SetCharacterEncodingFilter
   /* 
 

---

 

第二种方法是替换默认的控制器org.apache.struts.action.ActionServlet

 

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子类代码：
package jp.co.ricoh.gtis.others.profile.controllers;

 

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionServlet;

public class SetEncodingActionServlet extends ActionServlet {

 protected void process(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
  // TODO Auto-generated method stub
  String encoding = getInitParameter("encoding");
  request.setCharacterEncoding(encoding);
  super.process(request, response);
 }

}

---

 

配置文件web.xml
 
    testAction
    jp.co.ricoh.gtis.others.profile.controllers.SetEncodingActionServlet
   
      config
      /WEB-INF/struts-config.xml
   
   
      encoding
      utf-8
   
    2
 

 
    testAction
    *.testdo
 

此例，凡是通过*.testdo来请求的数据，都会经过参数encoding设定的值来编码。