jackson 常用注解学习

User.java

package org.example.entity;

import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import lombok.Data;

import java.time.LocalDateTime;

@Data
public class User {

    @JsonProperty(value = "姓名")
    private String name;
    
    @JsonProperty(value = "年龄")
    private Integer age;
    
    @JsonProperty(value = "城市")
    private String city;
    
    @JsonProperty(value = "地址")
    private String address;
    
    @JsonProperty(value = "生日")
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    @JsonSerialize(using = LocalDateTimeSerializer.class)
    @JsonDeserialize(using = LocalDateTimeDeserializer.class)
    private LocalDateTime birthday;
    
    @JsonProperty(value = "级别")
    @JsonInclude(value = JsonInclude.Include.NON_NULL)
    private Integer level;
    
    @JsonIgnore
    private String password;

}

@JsonProperty
属性注解，表示序列化时 key 的名字

@JsonIgnore
属性注解，表示序列化时排除的属性

@JsonInclude(value = JsonInclude.Include.NON_NULL)
属性注解，表示序列化时仅包含非空字段

@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
@JsonSerialize(using = LocalDateTimeSerializer.class)
@JsonDeserialize(using = LocalDateTimeDeserializer.class)
属性注解，组合使用，用于对 LocalDateTime 类型字段的序列化及反序列化时的字符串格式