Ajax using SPRINGMVC return value garbled problem

Front-End Code:
Passing values through AJAX, the return value of the Chinese garbled problem
$.ajax ({                URL:' buyercartmorehandle ',                type:' post ',                ' application/ x-www-form-urlencoded; Charset=utf-8 ",                Data:param,                dataType:' text ',                success:function( Data) {                    alert (data);                    Window.location.reload ();                }            })

Back-end Code

@RequestMapping (value= "Buyercartmorehandle", method=requestmethod.post,produces={"text/html;charset=utf-8;", " Application/json; " }) @ResponseBody    public String buyercartmorehandle (Model m, @RequestParam (value = " buyercartarray[] "string[] buyercartarray)//Pass the array in the form of a change parameter type, @requestParam (value=" ")
　　　　
produces={"text/html;charset=utf-8;", "Application/json;"} Realize

}

Detailed reference:

Https://www.cnblogs.com/zique/p/6171862.html

Ajax using SPRINGMVC return value garbled problem