前言

最近初接觸C#語言捶牢，發(fā)現(xiàn)JSON解析這塊和JAVA差異過大，所以針對簡單的JSON操作巍耗，如String秋麸、int、Array常用類型進(jìn)行演示炬太、留存灸蟆，便于以后的使用。

使用的庫

本文使用到了Newtonsoft.Json庫亲族，使用時可直接在NuGet程序包中進(jìn)行安裝炒考。

• 使用到的命名空間如下：

using Newtonsoft.Json.Linq;
using Newtonsoft.Json;

生成JSON

手動生成

public static String generateJsonStr()
{
    //生成JSON
    JObject rootJ = new JObject();
    rootJ["className"] = "六年級一班";
    rootJ["classTeacher"] = "張欣悅";

    JArray datas = new JArray();
    //生成第1條數(shù)據(jù)
    JObject itemJ1 = new JObject();
    itemJ1["name"] = "張?zhí)烀?;
    itemJ1["sex"] = "男";
    itemJ1["age"] = 14;

    JArray majorCouse1 = new JArray();
    majorCouse1.Add("語文");
    majorCouse1.Add("數(shù)學(xué)");
    majorCouse1.Add("音樂");
    itemJ1["majorCourse"] = majorCouse1;

    datas.Add(itemJ1);
    //生成第2條數(shù)據(jù)
    JObject itemJ2 = new JObject();
    itemJ2["name"] = "劉一一";
    itemJ2["sex"] = "女";
    itemJ2["age"] = 15;

    JArray majorCouse2 = new JArray();
    majorCouse2.Add("語文");
    majorCouse2.Add("數(shù)學(xué)");
    majorCouse2.Add("舞蹈");
    itemJ2["majorCourse"] = majorCouse2;

    datas.Add(itemJ2);
    rootJ["datas"] = datas;
    return rootJ.ToString();
}

序列化對象

using Newtonsoft.Json;
//將對象序列化為JSON數(shù)據(jù)
String JsonStr = JsonConvert.SerializeObject(studentBean);

解析JSON

手動解析

注意：此處轉(zhuǎn)換為List集合時，不可將包含多種類型的數(shù)組轉(zhuǎn)換為List集合霎迫，會失斦唷！目前使用的數(shù)據(jù)格式如："majorCourse": ["語文","數(shù)學(xué)","音樂"]

JObject rootJ = JObject.Parse(JsonStr);
String className = rootJ.Value<String>("className");
String classTeacher = rootJ.Value<String>("classTeacher");
JArray rootJA = rootJ.Value<JArray>("datas");

foreach (JObject itemJ in rootJA) 
{
     String name = itemJ.Value<String>("name");
     String sex = itemJ.Value<String>("sex");
     String age = itemJ.Value<String>("age");
     //直接將Strijng類型的Json數(shù)組轉(zhuǎn)換為List集合
     List<String> majorCourse = itemJ.Value<JArray>("majorCourse").ToObject<List<String>>();
     printLog("name="+ name + ",sex="+sex + ",age=" + age + majorCourse[0]);

     foreach(String item in majorCourse)
     {
           printLog("課程：" + item);
     }

}

項目中使用的數(shù)據(jù)

生成的JSON數(shù)據(jù)

{
    "className": "六年級一班",
    "classTeacher": "張欣悅",
    "datas": [
        {
            "name": "張?zhí)烀?,
            "sex":"男",
            "age":14,
            "majorCourse": [
                "語文",
                "數(shù)學(xué)",
                "音樂"
            ]
        },
        {
            "name": "劉一一",
            "sex": "女",
            "age": 15,
            "majorCourse": [
                "語文",
                "數(shù)學(xué)",
                "舞蹈"
            ]
        }
    ]
}

源碼

using Newtonsoft.Json.Linq;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using WindowsFormsApp1.json.bean;

namespace WindowsFormsApp1.json
{
    class JsonDemo
    {

        public static void JsonDemoStart()
        {
            String jsonStr = generateJsonStr();
            printLog("生成的JSON數(shù)據(jù)為：" + jsonStr.ToString());
            //反序列化為對象Bean
            StudentBean studentBean = JsonConvert.DeserializeObject<StudentBean>(jsonStr);
            //獲取數(shù)據(jù)
            printLog("班主任姓名為：" + studentBean.classTeacher);
            printLog("學(xué)生信息為：" + studentBean.datas[0]);

            //將對象序列化為JSON數(shù)據(jù)
            String JsonStr = JsonConvert.SerializeObject(studentBean);
            printLog("序列化Json數(shù)據(jù)：" + JsonStr);

            //手動JSON解析
            JObject rootJ = JObject.Parse(JsonStr);
            String className = rootJ.Value<String>("className");
            String classTeacher = rootJ.Value<String>("classTeacher");
            JArray rootJA = rootJ.Value<JArray>("datas");


            foreach (JObject itemJ in rootJA) 
            {
                String name = itemJ.Value<String>("name");
                String sex = itemJ.Value<String>("sex");
                String age = itemJ.Value<String>("age");
                //直接將Strijng類型的Json數(shù)組轉(zhuǎn)換為List集合
                List<String> majorCourse = itemJ.Value<JArray>("majorCourse").ToObject<List<String>>();
                printLog("name="+ name + ",sex="+sex + ",age=" + age + majorCourse[0]);

                foreach(String item in majorCourse)
                {
                    printLog("課程：" + item);
                }

            }

   
        }

        public static String generateJsonStr()
        {
            //生成JSON
            JObject rootJ = new JObject();
            rootJ["className"] = "六年級一班";
            rootJ["classTeacher"] = "張欣悅";

            JArray datas = new JArray();
            //生成第1條數(shù)據(jù)
            JObject itemJ1 = new JObject();
            itemJ1["name"] = "張?zhí)烀?;
            itemJ1["sex"] = "男";
            itemJ1["age"] = 14;

            JArray majorCouse1 = new JArray();
            majorCouse1.Add("語文");
            majorCouse1.Add("數(shù)學(xué)");
            majorCouse1.Add("音樂");
            itemJ1["majorCourse"] = majorCouse1;

            datas.Add(itemJ1);
            //生成第2條數(shù)據(jù)
            JObject itemJ2 = new JObject();
            itemJ2["name"] = "劉一一";
            itemJ2["sex"] = "女";
            itemJ2["age"] = 15;

            JArray majorCouse2 = new JArray();
            majorCouse2.Add("語文");
            majorCouse2.Add("數(shù)學(xué)");
            majorCouse2.Add("舞蹈");
            itemJ2["majorCourse"] = majorCouse2;

            datas.Add(itemJ2);

            rootJ["datas"] = datas;

            return rootJ.ToString();
        }




        public static void printLog(String log)
        {
            Console.WriteLine(log);
        }

    }
}

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

namespace WindowsFormsApp1.json.bean
{
    class StudentBean
    {
        public String className 
        {
            get;
            set;
        }
        public String classTeacher
        {
            get;
            set;
        }
        public List<StudentItemBean> datas
        {
            get;
            set;
        }
    }
    class StudentItemBean 
    {
        public String name
        {
            get;
            set;
        }
        public String sex
        {
            get;
            set;
        }
        public int age
        {
            get;
            set;
        }
        public List<String> majorCourse
        {
            get;
            set;
        }

        
        public override String ToString() 
        {
            return String.Format("[name={0},sex={1},age={2},majorCourse={3}]", name, sex, age, majorCourse);
        }
    }
}