使用JAVA反射如何创建自定义JSON对象映射

Question

{
  FirstName: "Sample",
  LastName: "LName",
  Address: [
    {
      type: "Temp",
      street: "test stree",
      
    },
    {
      type: "Perm",
      street: "test stree",
      
    }
  ]
}

Class Parent{

private String Name1;
private String Nama2;
private List<Address> address;}

Class Address{

Private String type;

private String data;
}

Answer 1

如果接收到具有相同结构的json数据，但属性名称发生了变化，则需要反射，例如：

{
  FirstName1: "Sample",
  LastName1: "LName",
  Address1: [
    {
      type1: "Temp",
      street1: "test stree",
      
    },
    {
      type1: "Perm",
      street1: "test stree",
      
    }
  ]
}

{
  FirstName2: "Sample",
  LastName2: "LName",
  Address1: [
    {
      type2: "Temp",
      street2: "test stree",
      
    },
    {
      type2: "Perm",
      street2: "test stree",
      
    }
  ]
}

在您的情况下，它看起来更像是一个属性名匹配问题，您可以像这样注释java pojo：

public class Parent{

  @JsonProperty("FirstName")
  private String Name1;

  @JsonProperty("LastName")
  private String Nama2;

  private List<Address> address;
}
   
public class Address{
    
  private String type;
    
  @JsonPRoperty("street")
  private String data;
}

最后，可以使用标准Jackson库反序列化json对象：

new ObjectMapper().readValue(json, Parent.class);