SpringMVC中get和post中文亂碼要分開解決：

POST提交：

只需要在web.xml中新增如下配置。post中文亂碼就解決了。
攔截規則根據自己需求

 <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>

GET提交：

1：亂碼的地方使用進行重新編碼

String param = new String(param.getBytes("ISO8859-1"), "UTF-8");

2：在Tomcat的 服務配置檔案server.xml裡面加上配置

<Connector port="8080" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443" URIEncoding="UTF-8"/>

第二種是改了伺服器配置，第一種操作繁瑣。

推薦使用：

3：自定義攔截器，使用動態代理：

package controller;

import
 
 java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Method;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.cglib.proxy.InvocationHandler;
import org.springframework.cglib.proxy.Proxy;
import org.springframework.web.filter.OncePerRequestFilter;

public class EncodingFilter extends OncePerRequestFilter {  
    private String encoding;  

    public void setEncoding(String encoding) {  
        this.encoding = encoding;  
    }  

    @Override  
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)  
            throws ServletException, IOException {  
        // 設定請求響應字元編碼  
        request.setCharacterEncoding(encoding);  
        response.setCharacterEncoding(encoding);  



        // 傳遞給目標servlet或jsp的實際上是動態代理的物件，而不是原始的HttpServletRequest物件  
        if("POST".equals(request.getMethod())){
        //如果是post提交直接放行。
            chain.doFilter(request, response);  

        }else{
        //get提交進行處理
        request = (HttpServletRequest) Proxy.newProxyInstance(request.getClass().getClassLoader(), request.getClass().getInterfaces(), new MyInvacationHandler(request));  
        chain.doFilter(request, response);
        }
        }  

    class MyInvacationHandler implements InvocationHandler{  
        private HttpServletRequest request;  
        MyInvacationHandler(HttpServletRequest request){  
            this.request=request;  
        }  

        @Override  
        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {  
            /*if("POST".equals(request.getMethod())){
                return value;
              }*/

            switch (method.getName()) {  
            case "getParameter":  
             String value = request.getParameter((String)args[0]);  
                try {  
                    if(value != null){  
                        value=new String(value.getBytes("ISO-8859-1"),encoding);  
                    }  
                } catch (UnsupportedEncodingException e) {  
                    e.printStackTrace();  
                }  
                return value;  
            case "getParameterValues":  
                String[] values = request.getParameterValues((String)args[0]);  
                if (values != null) {  
                    for (int i = 0; i < values.length; i++) {  
                        try {  
                            values[i] = new String(values[i].getBytes("ISO-8859-1"),encoding);  
                        } catch (UnsupportedEncodingException e) {  
                            e.printStackTrace();  
                        }  
                    }  
                }  
                return values;  
            default:  
                return method.invoke(request, args);  
            }  
        }



    }


}  

web.xml配置檔案中

<filter-name>encodingFilter</filter-name> 
  <filter-class>controller.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>

至此springmvc中的提交亂碼全部都解決。
在spring中，filter都預設繼承OncePerRequestFilter

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