jsp中的汉字到了action中成为乱码

Question

我要把下面这句字符转换的话所表达的意思(即把ISO8859转换成GBK)写进过滤器里面去,我没有写过过滤器,我把字符转换的话与过滤器都复制到下面,请哪位可以帮我把它们写在一起再拼出来.---------------------------
     String a = new String(shouzhi.getBytes("ISO-8859-1"),"GBK");---------------------------
package common.cdt;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*; // For Date class
public class ReportFilter implements Filter 
{
public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain)throws ServletException, IOException 
      {
                   HttpServletRequest req = (HttpServletRequest)request;
//                     System.out.println(req.getRemoteHost() +
//                                    " tried to access " +
//                                    req.getRequestURL() +
//                                    " on " + new Date() + ".");
                     chain.doFilter(request,response);
      }  public void init(FilterConfig config)
      throws ServletException {
  }  public void destroy() {}
}

Answer 1

Lz的方法可以解决这个问题，但如果想一劳永逸的方法还是写一个过滤器。参考这篇文章：
http://www.blogjava.net/rickhunter/articles/33571.html

Answer 2

filter,转码或是重新编译tomcat都能解决问题，后两个也都算一劳永逸

Answer 3

这些方法都很麻烦，最简单的方法是在预处理的时候设置GB2312你后面的语言设置是比ActionForm的类获取页面相应信息的时间晚，所以那个时候设置语言代码也是没有用的！

Answer 4

http://www.blogjava.net/richardeee/archive/2007/01/23/Chinese_encoding_problem_for_all.html

Answer 5

这个问题太常见了，你在网上找找setCharaterEncode.java的过滤器的源代码，把它部署到你的项目中去即可

Answer 6

先写个过滤器类
import javax.servlet.Filter;
import javax.servlet.FilterConfig;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.FilterChain;
import java.io.*;
import javax.servlet.*;public class FilterMain implements Filter{
  private FilterConfig fc;
  private String encoding;
  private boolean enable;  public FilterMain() {
  }  public void init(FilterConfig filterConfig) {
    this.fc = filterConfig;
    this.encoding = this.fc.getInitParameter("encoding");
    String able = this.fc.getInitParameter("enable");
    if(able.equalsIgnoreCase("true")){
      this.enable = true;
    }
  }  public void doFilter(ServletRequest servletRequest,
                       ServletResponse servletResponse, FilterChain filterChain) {
    if(this.enable){
    try {
      servletRequest.setCharacterEncoding(this.encoding);
    }
    catch (UnsupportedEncodingException ex) {
    }
    }
    try {
      filterChain.doFilter(servletRequest, servletResponse);
    }
    catch (ServletException ex1) {
    }
    catch (IOException ex1) {
    }
  }  public void destroy() {
  }
}然后在Web.xml中添加以下代码
<web-app>
  <filter>
    <filter-name>filtermain</filter-name>
    <filter-class>com.mlh.filtertest.FilterMain</filter-class>
    <init-param>
      <param-name>enable</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>gb2312</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>filtermain</filter-name>
    <url-pattern>/filterservlet</url-pattern>
  </filter-mapping>
....
</web-app>

Answer 7

把这一句代码加上:
<%@ page language="java" pageEncoding="GBK" %>