java转换映射到pojo忽略某些键

Question

public class MyPojo{ 
    String name,
    String addr
}
//map contains keys that not in MyPojo field,e.g. age
map = {"name":"john","addr":"sf school","age":"21"}

final ObjectMapper mapper = new ObjectMapper(); // jackson's objectmapper
final MyPojo pojo = mapper.convertValue(map, MyPojo.class);

Answer 1

您可以在您的MyPojo类中使用@JsonIgnoreprorpertiesby Jackson。这个例外是由于ObjectMapper无法在您的MyPojo类中找到精确的映射。

API是在ObjectMapper的相同库中提供的。

下面是您的类应该是什么样子的：

@JsonIgnoreProperties(ignoreUnknown = true)
public class MyPojo{
   String name;
   String addr;
   //Other variables
}

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;