var student = {

    "name":1,

    "age":2,

    "score":3

};

$.ajax({

    url:"student/test/delStudentByPrimaryKey.action",

    contentType:"application/json;charset=UTF-8",

    type:'POST',

    dataType:'json',//json 返回值类型

    data: JSON.stringify(student),//转化为json字符串

    success:function(data){

    }

});

@RequestMapping(value = "/delStudentByPrimaryKey")

void deleteByPrimaryKey(@RequestBody Student student){

        System.out.println(student);

}