content: package com.alibaba.fastjson2_demo;
  
  import com.alibaba.fastjson2.JSON;
  import com.alibaba.fastjson2.JSONB;
  import com.alibaba.fastjson2.JSONWriter;
  import org.junit.jupiter.api.Test;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.List;
  
  public class MappingDemo {
      @Test
      public void test_0() {
          Product product = new Product();
          product.id = 1;
          product.name = "DataWorks";
          System.out.println(JSON.toJSONString(product));
          System.out.println(JSON.toJSONString(product, JSONWriter.Feature.BeanToArray));
      }
      @Test
      public void test_0_jsonb() {
          Product product = new Product();
          product.id = 1;
          product.name = "DataWorks";
          System.out.println(Arrays.toString(JSONB.toBytes(product)));
          System.out.println(Arrays.toString(JSONB.toBytes(product, JSONWriter.Feature.BeanToArray)));
      }
      @Test
      public void test_list() {
          List<Product> productList = new ArrayList<>();
          productList.add(new Product(1, "DataWorks"));
          productList.add(new Product(2, "MaxCompute"));
          productList.add(new Product(3, "EMR"));
          productList.add(new Product(4, "Holo"));
  
          System.out.println(JSON.toJSONString(productList));
          System.out.println(JSON.toJSONString(productList, JSONWriter.Feature.BeanToArray));
      }
      @Test
      public void test_list_jsonb() {
          List<Product> productList = new ArrayList<>();
          productList.add(new Product(1, "DataWorks"));
          productList.add(new Product(2, "MaxCompute"));
          productList.add(new Product(3, "EMR"));
          productList.add(new Product(4, "Holo"));
  
          System.out.println(Arrays.toString(JSONB.toBytes(productList)));
          System.out.println(Arrays.toString(JSONB.toBytes(productList, JSONWriter.Feature.BeanToArray)));
      }
      public static class Product {
          public int id;
          public String name;
  
          public Product() {
          }
          public Product(int id, String name) {
              this.id = id;
              this.name = name;
          }
      }
  }
  