JSON字符串转List集合操作「建议收藏」

全栈程序员-站长 • 2022年5月14日上午6:40 • 未分类 • 阅读 36

大家好，又见面了，我是你们的朋友全栈君。

场景:
JSON字符串转List集合与List集合转JSON字符串
使用的jar包是fastjson-1.2.41.jar
1.JSON字符串转List集合操作

public static <T> List<T> parseArray(String text, Class<T> clazz) {
  try {
      return JSON.parseArray(text, clazz);
  } catch (Exception e) {
  }
  return Collections.emptyList();
}

2.List集合转JSON字符串操作

public static String toJSONString2(Object obj) {
  JSONArray jsonObj = (JSONArray) JSONArray.toJSON(obj);
  return jsonObj.toJSONString();
}

3.测试demo的main函数

public static void main(String []args){
  System.out.println("测试开始");
  //对象一
  DemoModel model = new DemoModel();
  model.setId(12345678);
  model.setType("01");
  model.setZ(1111.2222);
  model.setZ1(3333.4444);
  model.setZ2(5555.6666);
  model.setZ3(7777.8888);
  //对象二
  DemoModel model1 = new DemoModel();
  model1.setId(87654321);
  model1.setType("02");
  model1.setZ(2222.1111);
  model1.setZ1(4444.3333);
  model1.setZ2(6666.5555);
  model1.setZ3(8888.7777);
  //新建List
  List list = new ArrayList();
  list.add(model);
  list.add(model1);
  //List集合转JSON字符串
  String result = toJSONString2(list);
  System.out.println(result);
  //JSON字符串转List集合 	
  List list2 = parseArray(result,DemoModel.class);
  for(int i=0;i<list2.size();i++){
  	DemoModel modelTemp = (DemoModel) list2.get(i);
  	System.out.println("取值 z1=" + modelTemp.getZ1());
  }
  System.out.println("测试结束");
}

4.实体对象DemoModel.java

public class DemoModel implements Serializable{
  private static final long serialVersionUID = 6428876123605652053L;
  private long id;
  private String type;
  private double z;
  private double z1;
  private double z2;
  private double z3;
  public long getId() {
  	return id;
  }
  public void setId(long id) {
  	this.id = id;
  }
  public String getType() {
  	return type;
  }
  public void setType(String type) {
  	this.type = type;
  }
  public double getZ() {
  	return z;
  }
  public void setZ(double z) {
  	this.z = z;
  }
  public double getZ1() {
  	return z1;
  }
  public void setZ1(double z1) {
  	this.z1 = z1;
  }
  public double getZ2() {
  	return z2;
  }
  public void setZ2(double z2) {
  	this.z2 = z2;
  }
  public double getZ3() {
  	return z3;
  }
  public void setZ3(double z3) {
  	this.z3 = z3;
  }
}

以上,TKS

发布者：全栈程序员-站长，转载请注明出处：https://javaforall.net/146311.html原文链接：https://javaforall.net