spring mvc 避免IE执行AJAX时,返回JSON出现下载文件

controller

@RequestMapping(value = "/com/testjson", produces = { "text/plain;charset=UTF-8" })
public @ResponseBody String testjson(HttpServletRequest request){
    Map<String,Object> m = new HashMap<String,Object>();
    ......
    return new JSONObject(m).toString();
}

页面

$(‘#testFm‘).form(‘submit‘, {
    url : ‘com/testjson‘,
    type : "POST",
    onSubmit : function() {
        ......
        return validate;
    },
    success : function(data) {
        data = $.parseJSON(data);
        ......
    }
});

web.xml  设置编码

<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>