如何在Java中使用对象模型使用JsonWriter序列化JSON对象？

该 javax.json。JsonWriter 接口可以将JSON对象或数组结构写入输出 源。类javax.json.JsonWriterFactory包含创建JsonWriter 实例的方法。工厂实例可用于创建具有相同配置的多个编写器实例。我们可以创建一个使用从输出源作家静态 方法createWriter()的 javax.json.Json 类。

语法

public static JsonWriter createWriter(Writer writer)

在下面的示例中，我们可以使用JsonWriter接口序列化JSON对象。

示例

import java.io.StringWriter;
import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonObjectBuilder;
import javax.json.JsonWriter;
public class JsonWriterTest {
   public static void main(String[] args) {
      JsonObject jsonObj = Json.createObjectBuilder()
                 .add("name", "Adithya")
                 .add("age", 25)
                 .add("salary", 40000)
                 .add("address",
                      Json.createObjectBuilder().add("street", "Madhapur")
                                                .add("city", "Hyderabad")
                                                .add("zipCode", "500084")
                                                .build()
                      )
                 .add("phoneNumber",
                      Json.createArrayBuilder().add("9959984000")
                                               .add("7702144400")
                                               .build()
                     )
                 .build();

      StringWriter stringWriter = new StringWriter();
      JsonWriter writer = Json.createWriter(stringWriter);
      writer.writeObject(jsonObj);
      writer.close();
      System.out.println(stringWriter.getBuffer().toString());
   }
}

输出结果

{"name":"Adithya","age":25,"salary":40000,"address":{"street":"Madhapur","city":
"Hyderabad","zipCode":"500084"},"phoneNumber":["9959984000","7702144400"]}