http请求参数中中文乱码问题解决办法

问题现象：

请求URL为：

http://127.0.0.1:9999/micp/queryObjectOut?moduleId=1&json={"hphm":"H3XX96","hpzl":"02","hphm_cn":"陕"}

后台接收到json字符串中hphm_cn始终为乱码。

解决办法：

1 首先处理整个项目编码，保持一致。servlet通过过滤器完成，过滤器代码如下：

package cn.woogo.micp.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;

/**
* ClassName: CharacterEncodingFilter
*
* @Description: 处理请求参数乱码问题
* @author Zeus
* @date 2016-5-17
*/
public class CharacterEncodingFilter implements Filter {

    protected String encoding = null ;

    protected FilterConfig filterConfig = null ;

    protected boolean ignore = true ;

    @Override
    public void destroy() {
        this.encoding = null ;
        this.filterConfig = null ;
    }

    @Override
    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);
    }

    @Override
    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);
    }
}

View Code

2  web.xml文件中配置：

<? xml version="1.0" encoding="UTF-8" ?>
< web-app version ="2.5" xmlns ="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation ="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" >
    < welcome-file-list >
        < welcome-file >index.jsp </ welcome-file >
    </ welcome-file-list >

    <!-- 编码处理过滤器 -->
    < filter >
        < filter-name >Character Encoding </ filter-name >
        < filter-class >cn.woogo.micp.filter.CharacterEncodingFilter </ filter-class >
        < init-param >
            < param-name >encoding </ param-name >
            < param-value >UTF-8 </ param-value >
        </ init-param >
    </ filter >
    <!-- 制定过滤器映射 -->
    < filter-mapping >
        < filter-name >Character Encoding </ filter-name >
        < url-pattern >/* </ url-pattern >
    </ filter-mapping >

</ web-app >

View Code

3 tomcat配置

打开tomcat安装路径，e.g. D:\tomcat\apache-tomcat-7.0.64\conf\server.xml，增加URIEncoding。如下:

<Connector port="9999" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" URIEncoding ="UTF-8"/>