Example code for deserializing into objects in spring mvc

Requirements: spring mvc receives JSON data submitted by ajax and deserializes it into an object. The code is as follows:

Front-end JS code:

//属性要与带转化的对象属性对应var param={name:'语文',price:16};

$.ajax({
    url: "/book/adddata",
    type: "POST",
    dataType: 'json',//必需设定，后台@RequestBody会根据它做数据反序列化contentType:"application/json",//必需把JSON数据以字符串的格式提交    data:JSON.stringify(param),
    success: function (data) {
       alert('添加成功');
    },
    error: function (XMLHttpRequest, textStatus) {
        alert('添加失败');
    }
});

Backend JAVA code ：

    @RequestMapping(value="adddata")
    @ResponseBodypublic  Protocol addData(Model model, @RequestBody Book book) {
        Book reData = bookService.add(book);return reData;
    }

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