中文乱码—终极解决

1.前台页面

jsp，html页面头部设置字符编码为utf-8
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<META http-equiv="Content-Type" content="text/html; charset=utf-8">

2.控制器

(1)如果是servlet设置页面请求和回应的编码：

request.setCharacterEncoding("utf-8");  [一般用于post请求方式]

response.setCharacterEncoding("utf-8");

(2)如果是struts2

struts.xml前面加上这么一句：
<constant name="struts.i18n.encoding" value="utf-8" />

(3)如果使用了spring框架

web.xml配置

 <!-- 编码过滤器 -->
<filter>
 <filter-name>encodingFilter</filter-name>
 <filter-class>org.springframework.web.filter.EncodingFilter</filter-class>
 <init-param>
  <param-name>encoding</param-name>
  <param-value>UTF-8</param-value>
 </init-param>
</filter>
<filter-mapping>
 <filter-name>encodingFilter</filter-name>
 <url-pattern>/*</url-pattern>
</filter-mapping>

 

创建过滤器 EncodingFilter

public class EncodeFilter implements Filter {

    protected String encoding = null;

    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {

        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);
        
        chain.doFilter(request, response);
    }

    @Override
    public void init(FilterConfig config) throws ServletException {

        this.encoding = config.getInitParameter("encoding");
    }
}

3.数据库

第一保证数据库的db和table的编码格式是utf-8

第二jdbc:mysql://localhost:3306/android_stat?useUnicode=true&characterEncoding=utf-8
在连接数据库的时候加上 ?useUnicode=true&characterEncoding=utf-8


4.字符流

String string = request.getParametes('name');

//把得到的值转为原始编码，再转为UTF-8
string=new String(string.getBytes("iso8859-1"),"UTF-8");  [一般用于get请求]

5.tomcat原因

在server.xml加上     <Connector port="8080" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" URIEncoding="UTF-8"/>

 6.JS或URL

前台：var name = encodeURI($("#name").val(),"utf-8");

后台：String name=URLDecoder.decode(request.getParameter("name"),"utf-8");