1如果使用的tomcat服务器，在server.xml中Connector 标签后加 URIEncoding="UTF-8"；
2使用web过滤器：
（1）、新建一个SetCharacterEncodingFilter.java的类：
package com.util;
import java.io.IOException;
import javax.servlet.*;
public class SetCharacterEncodingFilter
implements Filter{
protected String encoding = null;
protected FilterConfig filterConfig = null;
protected boolean ignore = true;
public void destroy()
{
this.encoding = null;
this.filterConfig = null;
}
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain) throws IOException, ServletException
{
if (ignore
|| (request.getCharacterEncoding() == null))
{
String encoding = selectEncoding(request);
if (encoding != null)
request.setCharacterEncoding(encoding);
}
chain.doFilter(request, response);
}
public void init(FilterConfig filterConfig)
throws ServletException
{
this.filterConfig = filterConfig;
//
获取初始化参数
this.encoding = filterConfig.getInitParameter("encoding");
String value
= filterConfig.getInitParameter("ignore");
if (value ==
null)
{
this.ignore = true;
} else if
(value.equalsIgnoreCase("true"))
{
this.ignore = true;
} else if
(value.equalsIgnoreCase("yes"))
{
this.ignore = true;
} else
this.ignore = false;
}
protected String selectEncoding(ServletRequest
request)
{
return
(this.encoding);
}
}
（2）web.xml中在web-app里加入：
<!--定义一个过滤器， 并设定其初始化参数--><filter>
<filter-name>Set Character
Encoding</filter-name>
<filter-class>com.util.SetCharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB2312</param-value>
</init-param>
</filter>
<!--制定过滤器映射-->
<filter-mapping>
<filter-name>Set Character
Encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
3.<%@ page language="java" import="java.util.*,com.scce.entity.*" pageEncoding="utf-8"%>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
4.String name=new String(request.getParameter("name").getBytes("ISO8859-1"),"GBK");
new String(fileName.getBytes("UTF-8"), "GBK")
5.request.setCharacterEncoding("gbk");
response.setContentType("text/html;charset=gbk");
原文：http://www.cnblogs.com/blog-yuesheng521/p/4953996.html