JSP/Servlet+MySQL乱码解决注意事项

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1. 每个JSP页面应该有如下的code
   

java 代码

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>

      
      最好再加上

java 代码

"Content-Type" content="text/html; charset=UTF-8">

2.  用一个Filter来设置所有的request用UTF-8编码

      

java 代码

package com.yaoyuan.common.web;

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;
import javax.servlet.http.HttpServletResponse;

public class CharsetFilter implements Filter {

    public void destroy() {

    }

    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        ((HttpServletRequest)request).setCharacterEncoding("utf-8");
        ((HttpServletResponse)response).setCharacterEncoding("utf-8");
        chain.doFilter(request,response);
    }

    public void init(FilterConfig arg0) throws ServletException {

    }

}

3. 再web.xml中注册

xml 代码

<filter>
    <filter-name>CharsetFilterfilter-name>
    <filter-class>
        com.yaoyuan.common.web.CharsetFilter
    filter-class>
filter>
<filter-mapping>
    <filter-name>CharsetFilterfilter-name>
    <url-pattern>/*url-pattern>
filter-mapping>

4. 设置连接数据库的URL用UTF-8编码

java 代码

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://127.0.0.1/test?user=root&password=111111&useUnicode=true&characterEncoding=utf8&characterSetResults=utf8
username=root
password=111111

5. 设置数据库的默认编码为UTF-8

6. 最后应该注意所有JSP和Java源文件的保存编码应为UTF-8