Spring项目中文乱码，求大神支招

为了解决中文乱码问题我几乎翻遍了所有相关资料。检查了过滤器，修改了Tomcat配置，，胡乱加了个不忘了什么作用的环境变量，检查了IDEA的字符集，调整了request和response的字符集，可是结果该乱码还是乱码绝不含糊，我真没招了。

TestController.java

 @Controller
public class TestController {

    @RequestMapping(value = "/encode1", method = RequestMethod.GET)
    @ResponseBody
    public String encode1() throws Exception{
        return "中文";
    }

    @RequestMapping(value = "/encode2", method = RequestMethod.GET)
    @ResponseBody
    public String encode2(HttpServletRequest request,HttpServletResponse response, Object handler) throws Exception{
        response.setContentType("text/html; charset=UTF-8");
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        return new String("中文".getBytes("ISO-8859-1"), "UTF-8") + "中文" + request.getCharacterEncoding() + response.getContentType();
    }
}

web.xml

<servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <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>

Tomcat的server.xml

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

环境变量