1.頁面編碼

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8"/>

2.URL中的亂碼

改tomcat中server.xml中Connector的port=“8080”，加上一個(gè) URIEncoding=”utf-8”

3.配置過濾器，指定所有請求的編碼

(1)配置spring的編碼過濾器，為了防止spring中post方式提交的時(shí)候中文亂碼，方法：修改web.xml文件，添加spring的編碼過濾器

<!-- 配置編碼方式過濾器,注意一點(diǎn):要配置在所有過濾器的前面 -->
  <filter>
    <filter-name>CharacterEncodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>utf-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

(2)配置編碼過濾器，方法：先創(chuàng)建filter類，再修改web.xml文件，注意的是放在spring的編碼過濾器之后

filter類：

package com.qiyuan.filter;

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 EncoidingFilter implements Filter {
    private String encoding="";
    @Override
    public void destroy() {
        // TODO Auto-generated method stub
    }
    //過濾方法  是否往下執(zhí)行
    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain chain)
            throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest)arg0;
        HttpServletResponse response=(HttpServletResponse)arg1;        
        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        //過濾通行證
        chain.doFilter(request, response);
    }
    //根據(jù)web.xml文件的配置進(jìn)行初始化  
    @Override
    public void init(FilterConfig arg0) throws ServletException {
        this.encoding = arg0.getInitParameter("Encoding");        
    }
}

修改web.xml，添加如下配置：

<!-- 配置編碼過濾 -->
   <filter>
    <filter-name>EncoidingFilter</filter-name>
    <filter-class>com.qiyuan.filter.EncoidingFilter</filter-class>    
    <init-param>
       <param-name>Encoding</param-name>
       <param-value>utf-8</param-value>
    </init-param>
  </filter>  
  <filter-mapping>
       <filter-name>EncoidingFilter</filter-name>
       <url-pattern>/*</url-pattern>
  </filter-mapping>

4.文件編碼

將文件另存為utf-8格式

5.數(shù)據(jù)庫編碼

連接字符串指定編碼格式

public static String URL="jdbc:mysql://127.0.0.1:3306/mvcdb?useUnicode=true&characterEncoding=UTF-8"

創(chuàng)建數(shù)據(jù)庫的時(shí)候指定utf-8編碼格式

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