Hutool-解析JSON

1、創建JSONObject

JSONObject jsonObject = JSONUtil.createObj()
                .put("姓名","張三")
                .put("年齡",12)
                .put("國籍","中國")
                .put("愛好","徒步");
        System.out.println(jsonObject);  //{"姓名":"張三","愛好":"徒步","國籍":"中國","年齡":12}
        JSONObject object = new JSONObject();
        object.append("姓名","張三")
                .append("年齡",12)
                .append("國籍","中國")
                .append("愛好","徒步");
        System.out.println(object.toString());  //{"姓名":["張三"],"愛好":["徒步"],"國籍":["中國"],"年齡":[12]}

2、解析JSONObject

        //解析json字符串
        //方式1
        String jsonStr = "{\"b\":\"value2\",\"c\":\"value3\",\"a\":\"value1\"}";
        JSONObject jsonObject2 = JSONUtil.parseObj(jsonStr);
        System.out.println(jsonObject2);  //{"a":"value1","b":"value2","c":"value3"}
        //方式2
        JSONObject object3 = new JSONObject(jsonStr);
        System.out.println(object3);   //{"a":"value1","b":"value2","c":"value3"}

3、JavaBean解析

@Data
public class UserA {
    private String name;
    private String a;
    private Date date;
    private List<Seq> sqs;
}

UserA userA = new UserA();
        userA.setName("nameTest");
        userA.setDate(new Date());
        userA.setSqs(CollectionUtil.newArrayList(new Seq(null), new Seq("seq2")));
        JSONObject json = JSONUtil.parseObj(userA,false,true);
        System.out.println(json.toStringPretty());
        //{
        //    "name": "nameTest",
        //    "a": null,
        //    "date": 1631158148011,
        //    "sqs": [
        //        {
        //        },
        //        {
        //        }
        //    ]
        //}

4、JSON數組-JSONArray

 //jsonArray的解析
        //方式1
        JSONArray array = JSONUtil.createArray();
        array.add("11");
        array.add("22");
        array.add("33");
        System.out.println(array.toString());  //["11","22","33"]
        //方式2
        JSONArray array1 = new JSONArray();
        array1.add("11");
        array1.add("22");
        array1.add("33");
        System.out.println(array1.toString());  //["11","22","33"]

        //解析json數組
        String jsonStr4 = "[\"value1\", \"value2\", \"value3\"]";
        JSONArray array3 = JSONUtil.parseArray(jsonStr4);
        System.out.println(array3);  //["value1","value2","value3"]