如何解决发送ajax乱码问题

<filter>
  <filter-name>encodingFilter</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>
  <init-param>
    <param-name>forceEncoding</param-name>
    <param-value>true</param-value>
  </init-param>
</filter>
<filter-mapping>
  <filter-name>encodingFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<meta http-equiv=”content-type” content=”text/html; charset=UTF-8″ />

$.ajax({
   url:"list",
   type:'post',
   data:{
     param:recode,
     city:locationActive
   },
   dataType: 'json',//要求服务器返回的是json
   success:function(res){}