我们如何在Java中使用流API实现JSON数组？-java教程-PHP中文网

我们如何在Java中使用流API实现JSON数组？

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发布： 2023-09-19 18:01:06

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我们如何在java中使用流api实现json数组？

JsonGenerator接口可用于以流式传输方式将 JSON 数据写入输出源。我们可以使用JsonGenerator的writeStartArray()方法创建或实现一个JSON数组，该方法在当前对象上下文中写入JSON名称/起始数组字符对。 writeStartObject() 方法写入 JSON 起始对象字符，仅在数组上下文中有效，writeEnd() 方法写入当前上下文的结尾。

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语法

<strong>JsonGenerator writeStartArray(String name)</strong>

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示例

import java.io.*;
import javax.json.*;
import javax.json.stream.*;
public class JsonGeneratorTest {
   public static void main(String[] args) throws Exception {
      StringWriter writer = new StringWriter();
      <strong>JsonGenerator </strong>jsonGen = <strong>Json.createGenerator</strong>(writer);
      jsonGen.<strong>writeStartObject()</strong>
             .<strong>write</strong>("name", "Adithya")
             .<strong>write</strong>("designation", "Python Developer")
             .<strong>write</strong>("company", "TutorialsPoint")
             .<strong>writeStartArray</strong>("personal details")
             .<strong>writeStartObject()</strong>
             .<strong>write</strong>("email", "adithya@gmail.com")
             .<strong>writeEnd()</strong>
             .<strong>writeStartObject()</strong>
             .<strong>write</strong>("contact", "9959927000")
             .<strong>writeEnd()  // end of object</strong>
             .<strong>writeEnd()  // end of an array</strong>
             .<strong>writeEnd()</strong>; // <strong>end of main object</strong>
      jsonGen.close();
      System.out.println(writer.toString());
   }
}

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输出

<strong>{"name":"Adithya","designation":"Python Developer","company":"TutorialsPoint","personal details":[{"email":"adithya@gmail.com"},{"contact":"9959927000"}]}</strong>

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