有很多API和库，但我更喜欢使用www.example.com建议的org.json APIjson.org
您还可以使用GSON库，它是将Java对象序列化到JSON和从JSON反序列化Java对象的最佳库之一。
下面是使用org.jsonAPI阅读上述JSON的快速演示。

import org.json.JSONObject;
import org.json.JSONArray;

public class HelloWorld {
    public static void main(String[] args) {
        String jsonString = "[ { \"name\": \"Andrew\", \"age\": 21, \"parents\": [ { \"name\": \"Joseph\", \"age\": 18 }, { \"name\": \"Joseph\", \"age\": 18 } ] }, { \"name\": \"Maria\", \"age\": 35, \"parents\": [ { \"name\": \"Kassandra\", \"age\": 16 }, { \"name\": \"Abigail\", \"age\": 22 } ] } ]";
        JSONArray json = new JSONArray(jsonString);
        for(int i=0; i<json.length(); i++){
          JSONObject j = json.getJSONObject(i);
          System.out.println(j + "\n------");
        }
    }
}

使用 jackson 库 。 这里 是 一 个 片段 。

public static void main(final String[] args) throws JsonProcessingException {
    final List<Child> children = new ObjectMapper().readValue(
        readFromFile("data.json"), new TypeReference<List<Child>>() {
        });
    System.out.println(children);
  }

  public static String readFromFile(final String resourcePath) {
    final ClassPathResource resource = new ClassPathResource(resourcePath);

    try {
      final InputStream inputStream = resource.getInputStream();
      return readFromInputStream(inputStream);
    } catch (final IOException var4) {
      return "";
    }
  }

  private static String readFromInputStream(final InputStream inputStream) throws IOException {
    final StringBuilder resultStringBuilder = new StringBuilder();
    final BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
    Throwable var3 = null;

    try {
      String line;
      try {
        while ((line = br.readLine()) != null) {
          resultStringBuilder.append(line).append("\n");
        }
      } catch (final Throwable var12) {
        var3 = var12;
        throw var12;
      }
    } finally {
      if (br != null) {
        if (var3 != null) {
          try {
            br.close();
          } catch (final Throwable var11) {
            var3.addSuppressed(var11);
          }
        } else {
          br.close();
        }
      }

    }

    return resultStringBuilder.toString();
  }

中 的 每 一 个

谷歌的gson似乎是最简单最简洁的途径，它已经有了一个序列化器/反序列化器，应该可以为大多数pojos工作。

String json = "[ { \"name\": \"Andrew\", \"age\": 21, \"parents\": [ { \"name\": \"Joseph\", \"age\": 18 }, { \"name\": \"Joseph\", \"age\": 18 } ] }, { \"name\": \"Maria\", \"age\": 35, \"parents\": [ { \"name\": \"Kassandra\", \"age\": 16 }, { \"name\": \"Abigail\", \"age\": 22 } ] } ]";

    //default deserializer should work for strings, wrappers and select generics(including list)
    Gson gson = new Gson();

    JsonArray jsonArray = gson.fromJson(json, JsonArray.class);

    for (JsonElement jsonElement : jsonArray) {
        Person iPerson = gson.fromJson(jsonElement, Person.class);
        System.out.println(iPerson);
    }
    //output       
 /*  Person{name='Andrew', age=21, parents=[Person{name='Joseph', age=18, parents=null}, Person{name='Joseph', age=18, parents=null}]}
Person{name='Maria', age=35, parents=[Person{name='Kassandra', age=16, parents=null}, Person{name='Abigail', age=22, parents=null}]}*/