本地项目模拟跨域请求

$.ajax({
url:"http://localhost:8080/sys/topHotNews/update",//发送的路径
type:"post",//发送的方式
data:‘{"newsId":"5","type":"1","operation":"1"}‘,//发送的数据
contentType: "application/json", //提交数据类型
dataType:"json",//服务器返回的数据类型
success: function(data) {
if(data.msg="success"){
alert("已提交成功");

}else{
alert("提交失败");
}
},
error: function (data){
alert("提交失败");
}

});

@RequestMapping(value="/update",produces = "application/json;charset=utf-8", method = RequestMethod.POST)
@ResponseBody
public String insert(@RequestBody Test test){
    //处理逻辑代码 
}