spring3.2 ajax jquery 显示返回信息 中文乱码

1 工程前后台都使用UTF-8字符集。

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

3 spring3.2 注解 添加“produces = "text/plain;charset=UTF-8"”

@RequestMapping(value = "/batchDeleteUser.do", method = RequestMethod.POST,produces = "text/plain;charset=UTF-8")

@ResponseBody

public String ajax_batchDeleteUser(){

...

}