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HuTool工具使用(JSONUtil+JSONObject+JSONArray)

news 来源：原创 2024/5/9 3:47:00

maven依赖

<dependency><groupId>cn.hutool</groupId><artifactId>hutool-all</artifactId><version>5.8.15</version>
</dependency>

HutoolTest.java

package com.xjz;import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.lang.Dict;
import cn.hutool.json.JSONArray;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.zhwy.pojo.SurfChnMulMin;
import org.junit.jupiter.api.Test;import java.util.ArrayList;
import java.util.List;
import java.util.SortedMap;
import java.util.TreeMap;public class HutoolTest {//JSON字符串创建@Testpublic void toJsonStr() {SortedMap<Object, Object> sortedMap = new TreeMap<Object, Object>() {private static final long serialVersionUID = 1L;{put("attributes", "a");put("b", "b");put("c", "c");}};System.out.println(JSONUtil.toJsonStr(sortedMap));System.out.println(JSONUtil.toJsonPrettyStr(sortedMap));}//Json字符串解析@Testpublic void parseObj() {String html = "{\"name\":\"Something must have been changed since you leave\"}";JSONObject jsonObject = JSONUtil.parseObj(html);System.out.println(jsonObject.getStr("name"));}//XML字符串转换成JSON@Testpublic void parseFormXml() {String s = "<sfzh>123</sfzh><sfz>456</sfz><name>aa</name><gender>1</gender>";JSONObject json = JSONUtil.parseFromXml(s);System.out.println(json.get("sfzh"));System.out.println(json.get("name"));}//Json转换为XML@Testpublic void toXmlStr() {final JSONObject put = JSONUtil.createObj().set("aaa", "您好").set("xjz", "666");System.out.println(JSONUtil.toXmlStr(put));}//JSONObject代表一个JSON中的键值对象，这个对象以大括号包围，每个键值对使用,隔开，键与值使用:隔开，一个JSONObject类似于这样：//    {//        "key1":"value1",//        "key2":"value2"//    }//创建@Testpublic void createObj() {JSONObject json1 = JSONUtil.createObj().put("key", "value1").put("key2", "value2");JSONObject json2 = new JSONObject().set("key1", "v1").set("key2", "v2");System.out.println(json1);System.out.println(json2);}//1. Json字符串解析@Testpublic void toStringPretty() {String jsonStr = "{\"b\":\"value2\",\"c\":\"value3\",\"a\":\"value1\"}";//方法一：使用工具类转换JSONObject jsonObject = JSONUtil.parseObj(jsonStr);//方法二：new的方式转换JSONObject jsonObject2 = new JSONObject(jsonStr);//JSON对象转字符串（一行）System.out.println(jsonObject2);// 也可以美化一下，即显示出带缩进的JSON：System.out.println(jsonObject2.toStringPretty());}//JavaBean解析@Testpublic void jsonUtilParseObj() {SurfChnMulMin scmm = new SurfChnMulMin();scmm.setStationIdC("A00001");scmm.setStationName("xjz_2002");// false 表示不跳过null值JSONObject json = JSONUtil.parseObj(scmm, false);System.out.println(json);System.out.println(json.toJSONString(5));System.out.println(json.toStringPretty());}//在JSON中，JSONArray代表一个数组，使用中括号包围，每个元素使用逗号隔开。一个JSONArray类似于这样：//["value1","value2","value3"]//创建@Testpublic void createJsonArray() {JSONArray array = JSONUtil.createArray();JSONArray array2 = new JSONArray();array.add("value1");array.add("value2");array.add("value3");//转为JsonArray字符串System.out.println(array);}//从Bean列表解析@Testpublic void beanListParse() {SurfChnMulMin scmm = new SurfChnMulMin();scmm.setStationIdC("A00001");scmm.setStationName("xjz_2002");SurfChnMulMin scmm2 = new SurfChnMulMin();scmm2.setStationIdC("A00001");scmm2.setStationName("xjz_2002");ArrayList<SurfChnMulMin> list = CollUtil.newArrayList(scmm, scmm2);//        JSONArray jsonArray = JSONUtil.parseArray(list);JSONArray jsonArray = new JSONArray(list);System.out.println(jsonArray.getJSONObject(0).getStr("stationName"));}//从JSON字符串解析@Testpublic void toParseArray() {String jsonStr = "[\"value1\", \"value2\", \"value3\"]";JSONArray array = JSONUtil.parseArray(jsonStr);System.out.println("array=" + array);//array=["value1","value2","value3"]}//转换为bean的List@Testpublic void toList() {String jsonArr = "[{\"stationIdC\":111,\"stationName\":\"test1\"},{\"stationIdC\":112,\"stationName\":\"test2\"}]";JSONArray array = JSONUtil.parseArray(jsonArr);System.out.println("array=" + array);//array=[{"id":111,"name":"test1"},{"id":112,"name":"test2"}]List<SurfChnMulMin> userList = JSONUtil.toList(array, SurfChnMulMin.class);// 111System.out.println(userList.get(0).getStationIdC());}//转换为Dict的List@Testpublic void parseDictList() {String jsonArr = "[{\"id\":111,\"name\":\"test1\"},{\"id\":112,\"name\":\"test2\"}]";JSONArray array = JSONUtil.parseArray(jsonArr);List<Dict> list = JSONUtil.toList(array, Dict.class);// 111System.out.println(list.get(0).getInt("id"));}//转换为数组@Testpublic void parseArray() {String jsonArr = "[{\"stationIdC\":111,\"stationName\":\"test1\"},{\"stationIdC\":112,\"stationName\":\"test2\"}]";JSONArray array = JSONUtil.parseArray(jsonArr);SurfChnMulMin[] list = array.toArray(new SurfChnMulMin[0]);}//Json路径@Testpublic void getByPath() {String jsonStr = "[{\"id\": \"1\",\"name\": \"a\"},{\"id\": \"2\",\"name\": \"b\"}]";final JSONArray jsonArray = JSONUtil.parseArray(jsonStr);// bSystem.out.println(jsonArray.getByPath("[1].name"));}}