Json解析(Json集合,Json嵌套)

导入maven依赖:

<dependency>
        <groupId>net.sf.json-lib</groupId>
        <artifactId>json-lib</artifactId>
        <version>2.4</version>
        <classifier>jdk15</classifier>
    </dependency>
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测试数据:

{"aaa":"111111","bbb":222222,"ccc":{"type":"log"},"ddd":{"type1":"00001","type2":"00002"},"eee":[{"name":"Thomson","age":25,"gender":"男"},{"name":"Rose","age":23,"gender":"女"}],"fff":{"xxx1":"33333","xxx2":"44444","xxx3":"null","xxx4":{"userId":"dss78fds8fds76fds6sd78fds"},"xxx5":{"code":"55555","msg":{"yyy1":"6666","yyy2":"7777","yyy3":"888"}}}}
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测试数据美化:

测试代码:

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class JsonDemo {
    public static void main(String[] args) {
        testJson();
    }
    
    public static void testJson() {
    
    String jsonString ="{\"aaa\":\"111111\",\"bbb\":222222,\"ccc\":{\"type\":\"log\"},\"ddd\":{\"type1\":\"00001\",\"type2\":\"00002\"},\"eee\":[{\"name\":\"Thomson\",\"age\":25,\"gender\":\"男\"},{\"name\":\"Rose\",\"age\":23,\"gender\":\"女\"}],\"fff\":{\"xxx1\":\"33333\",\"xxx2\":\"44444\",\"xxx3\":\"null\",\"xxx4\":{\"userId\":\"dss78fds8fds76fds6sd78fds\"},\"xxx5\":{\"code\":\"55555\",\"msg\":{\"yyy1\":\"6666\",\"yyy2\":\"7777\",\"yyy3\":\"888\"}}}}\n";
    JSONObject jsonObject = JSONObject.fromObject(jsonString);

    //提取出aaa
    String aaa = jsonObject.getString("aaa");
    System.out.println("aaa:" + aaa);
    //提取出bbb
    String bbb = jsonObject.getString("bbb");
    System.out.println("bbb:" + bbb);


    **//注意:此处有嵌套json,应该先将其转换成JSONObject再对其进行操作**
    String cccJson = jsonObject.getString("ccc");
    JSONObject ccc = JSONObject.fromObject(cccJson);
    //提取出type
    String type = ccc.getString("type");
    System.out.println("type:" + type);

    String dddJson = jsonObject.getString("ddd");
    JSONObject ddd = JSONObject.fromObject(dddJson);
    //提取出type1
    String type1 = ddd.getString("type1");
    System.out.println("type1:" + type1);
    //提取出type2
    String type2 = ddd.getString("type2");
    System.out.println("type2:" + type2);


    **//注意:此处有json的嵌套集合,应先转换成JSONArray再对其进行遍历操作**
    JSONArray eee = jsonObject.getJSONArray("eee");
    System.out.println(eee.size());
    for (int i = 0; i < eee.size(); i++) {
        String name = eee.getJSONObject(i).getString("name");
        String age = eee.getJSONObject(i).getString("age");
        String gender = eee.getJSONObject(i).getString("gender");
        System.out.println("name--age--gender:"+name+"--"+age+"--"+gender);

    }


    **//注意:此处有多重嵌套json,应该先将其转换成JSONObject再对其内部数据分析,不同类型用不同的方法**
    String fffJson = jsonObject.getString("fff");
    JSONObject fff = JSONObject.fromObject(fffJson);
    //直接获取内部msg对应的信息
    String xxx5Json = fff.getString("xxx5");
    JSONObject xxx5 = JSONObject.fromObject(xxx5Json);
    String msgJson = xxx5.getString("msg");
    JSONObject msg = JSONObject.fromObject(msgJson);
    System.out.println(msg);
    String yyy1 = msg.getString("yyy1");
    String yyy2 = msg.getString("yyy2");
    String yyy3 = msg.getString("yyy3");
    System.out.println("yyy1:" + yyy1);
    System.out.println("yyy2:" + yyy2);
    System.out.println("yyy3:" + yyy3);

  }
}
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运行结果:

“C:\Program Files\Java\jdk1.8.0_161\bin\java.exe” "-javaagent:…
aaa:111111
bbb:222222
type:log
type1:00001
type2:00002
2
name–age–gender:Thomson–25–男
name–age–gender:Rose–23–女
{“yyy1”:“6666”,“yyy2”:“7777”,“yyy3”:“888”}
yyy1:6666
yyy2:7777
yyy3:888

Process finished with exit code 0

备注:

Json解析结果可以放到一个Map或者List集合中,也可以封装到对象中,这些简单操作我就不做过多补充了