[知了堂学习笔记]_JSON数据操作第2讲(JSON的封装与解析)

    /***
     * 通过id来检索申诉信息并传到页面AJAX调用
     * admin
     * @return
     */
    public String getListAppeal(HttpServletRequest request, HttpServletResponse response){
        String id = request.getParameter("appeal_id");
        try {
            response.setContentType("text/html;charset=utf-8");
            PrintWriter out = response.getWriter();
            Gson gson = new Gson();
            System.out.println("我是JSON格式字符串："+gson.toJson(appealService.getListAppeal(id)));
            out.print(gson.toJson(appealService.getListAppeal(id)));
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;//null代表AJAX调用
        
    }

$.ajax({
                url:"appeal.do",
                data:{"method":"getListAppeal","appeal_id":id},
                datatype:"json",
                type:"POST",
                success: function(result){//result-->接收servlet层返回的参数
                    console.log("未处理==="+result);
                    var json = eval(result);/* JSON解析 */
                    console.log("已处理==="+json);
                    //获取JSON数据中的值
                    $("#id").val(json[0].appeal_id);
                    $("#userAccount").val(json[0].user_account);
                    $("#type").val(json[0].appeal_type);
                    $("#content").val(json[0].appeal_content);
                    $("#time").val(json[0].appeal_time);
                }
            });

$.ajax({
                url:"orderServlet.do?method=getMapOrderNumByGame",
                datatype:"JSON",
                type:"POST",
                async: false, 
                success:function(result){
                    /* alert(eval(result)) */
                    console.log("未处理==》"+result);
                    console.log("处理一次===》"+eval(result));
                    var json = eval(eval(result));
                    console.log("处理两次===》"+json);
                    option.series[0].data = json
                    var s="";
                    for ( var j in json) {
                        s+=","+json[j].name
                    }
                    s=s.substr(1);
                    option.legend.data=s.split(",");
                    myChart.setOption(option);
                }
            });