Jackson将对象转成json字符串,修改字段名(isEncryption)

1.背景

在将一个对象转成ArrayNode时,出现了下面的情况

ParamVo(name=Date, value=20202020, desc=ddddddddddd, isEncryption=true)

public class ParamVo implements Serializable {
    private static final long serialVersionUID = 1L;

    
    private String name;
    
    private String value;
    
    private String desc;
    
    private boolean isEncryption;
}

输出的结果为

    public static void main(String[] args) throws Exception {
        ParamVo paramVo = new ParamVo("Date", "$dateDay", "dddddddd", true);
        ObjectMapper OBJECT_MAPPER = new ObjectMapper();
        System.out.println(OBJECT_MAPPER.writeValueAsString(paramVo));
    }



# {"name":"Date","value":"$dateDay","encryption":true,"desc":"dddddddd"}

很明显 isEncryption 变成了 encryption,这是什么原因呢?(自行查找原因)

但是如何解决这个问题呢?

首先JackSon 根据getter 来定位Json 对象的属性，而不是字段,现在我们给字段增加注解

@JsonProperty

public class ParamVo implements Serializable {
    private static final long serialVersionUID = 1L;

    
    private String name;
    
    private String value;
    
    @JsonProperty("kkk")
    private String desc;
    
    @JsonProperty("isEncryption")
    private boolean isEncryption;
}

现在输出结果(isEncryption不再变成encryption,desc变成了kkk)

    public static void main(String[] args) throws Exception {
        ParamVo paramVo = new ParamVo("Date", "$dateDay", "dddddddd", true);
        ObjectMapper OBJECT_MAPPER = new ObjectMapper();
        System.out.println(OBJECT_MAPPER.writeValueAsString(paramVo));
    }




#{"name":"Date","value":"$dateDay","kkk":"dddddddd","isEncryption":true}