java json转实体多层对象 json转实体类对象

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attitude 2023-08-22 12:52:26

文章标签 java json转实体多层对象 json System List 文章分类 Java 后端开发

今天偶然知道，Vs自带Json转Entity的功能。

首先，复制你要转换的Json。

然后在新建一个类，准备输入：

VS最上面菜单栏点击，编辑->选择性粘贴->将Json转成类

版本好像要VS2012之后，因为听人说VS2010没有这个功能。

java json转实体多层对象 json转实体类对象_List

下面属于知识拓展，上面才是最简单的Json转实体的方法

编辑时间：2019-02-09 14:01:37

首先，需要在NuGet中下载添加Newtonsoft.Json
先来一段字符串：

string jsonString = "{\"log_id\":119047692893297896,\"direction\":0,\"words_result_num\":30,\"words_result\":{\"InvoiceNum\":\"61109124\",\"SellerName\":\"北京智能科技有限公司\",\"CommodityTaxRate\":[{\"word\":\"16%\",\"row\":\"1\"},{\"word\":\"6%\",\"row\":\"2\"},{\"word\":\"10%\",\"row\":\"3\"},{\"word\":\"6%\",\"row\":\"4\"}],\"SellerBank\":\"中国工商银行北京市分行菜市口支行\",\"Checker\":\"王东\",\"TotalAmount\":\"25440.39\",\"CommodityAmount\":[{\"word\":\"18750.00\",\"row\":\"1\"},{\"word\":\"1367.92\",\"row\":\"2\"},{\"word\":\"3954.55\",\"row\":\"3\"},{\"word\":\"1367.92\",\"row\":\"4\"}],\"InvoiceDate\":\"2019年01月15日\",\"CommodityTax\":[{\"word\":\"3000.00\",\"row\":\"1\"},{\"word\":\"82.08\",\"row\":\"2\"},{\"word\":\"395.45\",\"row\":\"3\"},{\"word\":\"82.08\",\"row\":\"4\"}],\"PurchaserName\":\"北京鸿泰科技发展有限公司\",\"CommodityNum\":[{\"word\":\"\",\"row\":\"1\"},{\"word\":\"1\",\"row\":\"2\"},{\"word\":\"1\",\"row\":\"3\"},{\"word\":\"1\",\"row\":\"4\"}],\"PurchaserBank\":\"北京农村商业银行股份有限公司\",\"Remarks\":\"\",\"Password\":\"70<336<4-6864-7546>850211977>+9+/5>-++0+57+*/+>*>>6691-9>1>-5/4377<9699<>6+米762+744*6-><66-75米0>04*038<3901<\",\"SellerAddress\":\"北京市东城区广渠门内大街\",\"PurchaserAddress\":\"北京市海淀区苏州街\",\"InvoiceCode\":\"1100182\",\"CommodityUnit\":[{\"word\":\"台\",\"row\":\"1\"},{\"word\":\"套\",\"row\":\"2\"},{\"word\":\"套\",\"row\":\"3\"},{\"word\":\"套\",\"row\":\"4\"}],\"Payee\":\"王丹\",\"PurchaserRegisterNum\":\"91110108MA00W2J\",\"CommodityPrice\":[{\"word\":\"8750.00\",\"row\":\"1\"},{\"word\":\"1367.9245283\",\"row\":\"2\"},{\"word\":\"3954.5454545\",\"row\":\"3\"},{\"word\":\"1367.9245283\",\"row\":\"4\"}],\"NoteDrawer\":\"管理\",\"AmountInWords\":\"贰万玖仟圆整\",\"AmountInFiguers\":\"29000.00\",\"TotalTax\":\"3559.61\",\"InvoiceType\":\"专用发票\",\"SellerRegisterNum\":\"91110109675057H\",\"CommodityName\":[{\"word\":\"*非电力家用器具*壁挂炉\",\"row\":\"1\"},{\"word\":\"*设计服务*设计费\",\"row\":\"2\"},{\"word\":\"*建筑服务*安装费\",\"row\":\"3\"},{\"word\":\"*信息技术服务*调试费\",\"row\":\"4\"}],\"CommodityType\":[{\"word\":\"\",\"row\":\"1\"},{\"word\":\"\",\"row\":\"2\"},{\"word\":\"\",\"row\":\"3\"},{\"word\":\"\",\"row\":\"4\"}],\"CheckCode\":\"\"}}";

{}包裹的内容，需要转成JObject
[]包裹的内容，需要转成JArray
上面的字符串最外围是{}，所以它的第一步转换就是：

JObject jsonObj = JObject.Parse(jsonString);

同样的，如果最外围是[]，就需要用

JArray jsonArr = JArray.Parse(jsonString);

而下一步基本相同，就是

var model = jsonObj.ToObject<Model>();

或者

var models = jsonArr.ToObject<List<Model>>();

其中，Model就是和json一一对应的实体了，其中的属性，要和json的Key一模一样。
针对上面的字符串，我我的整个转化代码如下，其中涉及JArray的部分也有，虽然没有全部写全，但意思全部表达出来了：
Result 就是JObject中的下层JObject
List 就是JObject内部的JArray，需要写成List;

using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace JsonDemo
{
    public class Model
    {
        public string log_id { get; set; }
        public int direction { get; set; }
        public int words_result_num { get; set; }
        public Result words_result { get; set; }
    }
    public class Result
    {
        public string InvoiceNum { get;set;}
        public string SellerName { get; set; }
        public List<WordRow> CommodityTaxRate { get; set; }
        public string SellerBank { get; set; }
        public string Checker { get; set; }
    }
    public class WordRow
    {
        public string word { get; set; }
        public string row { get; set; }
    }
    class Program
    {
        static void Main(string[] args)
        {
            string jsonString = "{\"log_id\":119047692893297896,\"direction\":0,\"words_result_num\":30,\"words_result\":{\"InvoiceNum\":\"61109124\",\"SellerName\":\"北京智能科技有限公司\",\"CommodityTaxRate\":[{\"word\":\"16%\",\"row\":\"1\"},{\"word\":\"6%\",\"row\":\"2\"},{\"word\":\"10%\",\"row\":\"3\"},{\"word\":\"6%\",\"row\":\"4\"}],\"SellerBank\":\"中国工商银行北京市分行菜市口支行\",\"Checker\":\"王东\",\"TotalAmount\":\"25440.39\",\"CommodityAmount\":[{\"word\":\"18750.00\",\"row\":\"1\"},{\"word\":\"1367.92\",\"row\":\"2\"},{\"word\":\"3954.55\",\"row\":\"3\"},{\"word\":\"1367.92\",\"row\":\"4\"}],\"InvoiceDate\":\"2019年01月15日\",\"CommodityTax\":[{\"word\":\"3000.00\",\"row\":\"1\"},{\"word\":\"82.08\",\"row\":\"2\"},{\"word\":\"395.45\",\"row\":\"3\"},{\"word\":\"82.08\",\"row\":\"4\"}],\"PurchaserName\":\"北京鸿泰科技发展有限公司\",\"CommodityNum\":[{\"word\":\"\",\"row\":\"1\"},{\"word\":\"1\",\"row\":\"2\"},{\"word\":\"1\",\"row\":\"3\"},{\"word\":\"1\",\"row\":\"4\"}],\"PurchaserBank\":\"北京农村商业银行股份有限公司\",\"Remarks\":\"\",\"Password\":\"70<336<4-6864-7546>850211977>+9+/5>-++0+57+*/+>*>>6691-9>1>-5/4377<9699<>6+米762+744*6-><66-75米0>04*038<3901<\",\"SellerAddress\":\"北京市东城区广渠门内大街\",\"PurchaserAddress\":\"北京市海淀区苏州街\",\"InvoiceCode\":\"1100182\",\"CommodityUnit\":[{\"word\":\"台\",\"row\":\"1\"},{\"word\":\"套\",\"row\":\"2\"},{\"word\":\"套\",\"row\":\"3\"},{\"word\":\"套\",\"row\":\"4\"}],\"Payee\":\"王丹\",\"PurchaserRegisterNum\":\"91110108MA00W2J\",\"CommodityPrice\":[{\"word\":\"8750.00\",\"row\":\"1\"},{\"word\":\"1367.9245283\",\"row\":\"2\"},{\"word\":\"3954.5454545\",\"row\":\"3\"},{\"word\":\"1367.9245283\",\"row\":\"4\"}],\"NoteDrawer\":\"管理\",\"AmountInWords\":\"贰万玖仟圆整\",\"AmountInFiguers\":\"29000.00\",\"TotalTax\":\"3559.61\",\"InvoiceType\":\"专用发票\",\"SellerRegisterNum\":\"91110109675057H\",\"CommodityName\":[{\"word\":\"*非电力家用器具*壁挂炉\",\"row\":\"1\"},{\"word\":\"*设计服务*设计费\",\"row\":\"2\"},{\"word\":\"*建筑服务*安装费\",\"row\":\"3\"},{\"word\":\"*信息技术服务*调试费\",\"row\":\"4\"}],\"CommodityType\":[{\"word\":\"\",\"row\":\"1\"},{\"word\":\"\",\"row\":\"2\"},{\"word\":\"\",\"row\":\"3\"},{\"word\":\"\",\"row\":\"4\"}],\"CheckCode\":\"\"}}";
            JObject jsonObj = JObject.Parse(jsonString);
            var model = jsonObj.ToObject<Model>();
            var temp = model;
        }
    }
}

顺便将Json字符串格式化一下，或许会更好看一点：

{
	"log_id": 119047692893297896,
	"direction": 0,
	"words_result_num": 30,
	"words_result": {
		"InvoiceNum": "61109124",
		"SellerName": "北京智能科技有限公司",
		"CommodityTaxRate": [{
			"word": "16%",
			"row": "1"
		}, {
			"word": "6%",
			"row": "2"
		}, {
			"word": "10%",
			"row": "3"
		}, {
			"word": "6%",
			"row": "4"
		}],
		"SellerBank": "中国工商银行北京市分行菜市口支行",
		"Checker": "王东",
		"TotalAmount": "25440.39",
		"CommodityAmount": [{
			"word": "18750.00",
			"row": "1"
		}, {
			"word": "1367.92",
			"row": "2"
		}, {
			"word": "3954.55",
			"row": "3"
		}, {
			"word": "1367.92",
			"row": "4"
		}],
		"InvoiceDate": "2019年01月15日",
		"CommodityTax": [{
			"word": "3000.00",
			"row": "1"
		}, {
			"word": "82.08",
			"row": "2"
		}, {
			"word": "395.45",
			"row": "3"
		}, {
			"word": "82.08",
			"row": "4"
		}],
		"PurchaserName": "北京鸿泰科技发展有限公司",
		"CommodityNum": [{
			"word": "",
			"row": "1"
		}, {
			"word": "1",
			"row": "2"
		}, {
			"word": "1",
			"row": "3"
		}, {
			"word": "1",
			"row": "4"
		}],
		"PurchaserBank": "北京农村商业银行股份有限公司",
		"Remarks": "",
		"Password": "70<336<4-6864-7546>850211977>+9+/5>-++0+57+*/+>*>>6691-9>1>-5/4377<9699<>6+米762+744*6-><66-75米0>04*038<3901<",
		"SellerAddress": "北京市东城区广渠门内大街",
		"PurchaserAddress": "北京市海淀区苏州街",
		"InvoiceCode": "1100182",
		"CommodityUnit": [{
			"word": "台",
			"row": "1"
		}, {
			"word": "套",
			"row": "2"
		}, {
			"word": "套",
			"row": "3"
		}, {
			"word": "套",
			"row": "4"
		}],
		"Payee": "王丹",
		"PurchaserRegisterNum": "91110108MA00W2J",
		"CommodityPrice": [{
			"word": "8750.00",
			"row": "1"
		}, {
			"word": "1367.9245283",
			"row": "2"
		}, {
			"word": "3954.5454545",
			"row": "3"
		}, {
			"word": "1367.9245283",
			"row": "4"
		}],
		"NoteDrawer": "管理",
		"AmountInWords": "贰万玖仟圆整",
		"AmountInFiguers": "29000.00",
		"TotalTax": "3559.61",
		"InvoiceType": "专用发票",
		"SellerRegisterNum": "91110109675057H",
		"CommodityName": [{
			"word": "*非电力家用器具*壁挂炉",
			"row": "1"
		}, {
			"word": "*设计服务*设计费",
			"row": "2"
		}, {
			"word": "*建筑服务*安装费",
			"row": "3"
		}, {
			"word": "*信息技术服务*调试费",
			"row": "4"
		}],
		"CommodityType": [{
			"word": "",
			"row": "1"
		}, {
			"word": "",
			"row": "2"
		}, {
			"word": "",
			"row": "3"
		}, {
			"word": "",
			"row": "4"
		}],
		"CheckCode": ""
	}
}

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