官网文档: https://mp.baomidou.com/guide/typehandler.html

必须在实体里面加上 @TableName(autoResultMap = true),不然无效

只要在对应字段加上注解就可以:

@TableName(autoResultMap = true)public class BlogUser implements Serializable { private static final long serialVersionUID = 1L; private Long id; private String name; @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") private LocalDateTime createTime; private Integer version; @TableField(typeHandler= JsonTypeHandler.class) private Map<String,Object> relation; @TableField(typeHandler= ArrayTypeHandler.class) private List<String> fans;

还有一种就是直接在xml里面写,直接引用,效果是一样的