SpringMVC 中文乱码的解决方案

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

< html >

< head >

     < title >Title</ title >

</ head >

< body >

< form action = "/c02/t1" method = "post" >

     < input type = "text" name = "name" >

     < input type = "submit" >

</ form >

</ body >

</ html >

package controller;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

public class controllerDemo02 {

     @RequestMapping ( "/c02/t1" )

     public String test1(String name, Model model){

         System.out.println(name);

         model.addAttribute( "message" ,name);

         return "test" ;

     }

}

package Filter;

import javax.servlet.*;

import java.io.IOException;

public class EncodingFilter implements Filter {

     public void init(FilterConfig filterConfig) throws ServletException {

     }

     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

         servletRequest.setCharacterEncoding( "utf-8" );

         servletResponse.setCharacterEncoding( "utf-8" );

         filterChain.doFilter(servletRequest,servletResponse);

     }

     public void destroy() {

     }

}

< filter >

     < filter-name >EncodingFilter</ filter-name >

     < filter-class >Filter.EncodingFilter</ filter-class >

</ filter >

< filter-mapping >

     < filter-name >EncodingFilter</ filter-name >

     < url-pattern >/*</ url-pattern >

</ filter-mapping >

< filter >

    < filter-name >encoding</ 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 >encoding</ filter-name >

    < url-pattern >/*</ url-pattern >

</ filter-mapping >

package Filter;

import javax.servlet.*;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletRequestWrapper;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

import java.io.UnsupportedEncodingException;

import java.util.Map;

public class GenericEncodingFilter implements Filter {

     public void destroy() {

     }

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

         //处理response的字符编码

         HttpServletResponse myResponse=(HttpServletResponse) response;

         myResponse.setContentType( "text/html;charset=UTF-8" );

         // 转型为与协议相关对象

         HttpServletRequest httpServletRequest = (HttpServletRequest) request;

         // 对request包装增强

         HttpServletRequest myrequest = new MyRequest(httpServletRequest);

         chain.doFilter(myrequest, response);

     }

     public void init(FilterConfig filterConfig) throws ServletException {

     }

}

//自定义request对象，HttpServletRequest的包装类

class MyRequest extends HttpServletRequestWrapper {

     private HttpServletRequest request;

     //是否编码的标记

     private boolean hasEncode;

     //定义一个可以传入HttpServletRequest对象的构造函数，以便对其进行装饰

     public MyRequest(HttpServletRequest request) {

         super (request); // super必须写

         this .request = request;

     }

     // 对需要增强方法 进行覆盖

     public Map getParameterMap() {

         // 先获得请求方式

         String method = request.getMethod();

         if (method.equalsIgnoreCase( "post" )) {

             // post请求

             try {

                 // 处理post乱码

                 request.setCharacterEncoding( "utf-8" );

                 return request.getParameterMap();

             } catch (UnsupportedEncodingException e) {

                 e.printStackTrace();

             }

         } else if (method.equalsIgnoreCase( "get" )) {

             // get请求

             Map<String, String[]> parameterMap = request.getParameterMap();

             if (!hasEncode) { // 确保get手动编码逻辑只运行一次

                 for (String parameterName : parameterMap.keySet()) {

                     String[] values = parameterMap.get(parameterName);

                     if (values != null ) {

                         for ( int i = 0 ; i < values.length; i++) {

                             try {

                                 // 处理get乱码

                                 values[i] = new String(values[i]

                                         .getBytes( "ISO-8859-1" ), "utf-8" );

                             } catch (UnsupportedEncodingException e) {

                                 e.printStackTrace();

                             }

                         }

                     }

                 }

                 hasEncode = true ;

             }

             return parameterMap;

         }

         return super .getParameterMap();

     }

     //取一个值

     public String getParameter(String name) {

         Map<String, String[]> parameterMap = getParameterMap();

         String[] values = parameterMap.get(name);

         if (values == null ) {

             return null ;

         }

         return values[ 0 ]; // 取回参数的第一个值

     }

     //取所有值

     public String[] getParameterValues(String name) {

         Map<String, String[]> parameterMap = getParameterMap();

         String[] values = parameterMap.get(name);

         return values;

     }

}