Mybatis日期格式自动转换需要用到的两个注解说明

public class Student {
    public Integer id;
    public String studentName;
    @JsonFormat(pattern="yyyy-MM-dd") //从数据库读出日期格式时，进行转换的规则
    @DateTimeFormat(pattern = "yyyy-MM-dd")//接受从前端传入的日期格式，映射到java类日期属性的规则
    public Date birth;    
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getStudentName() {
        return studentName;
    }
    public void setStudentName(String studentName) {
        this.studentName = studentName;
    }
    public Date getBirth() {
        return birth;
    }
    public void setBirth(Date birth) {
        this.birth = birth;
    }
}

@Select("select date_format(createTime,'%Y-%m-%d') from tb where id = ?")

@Update("update tb set createTime = date_format(now(),'%Y-%m-%d %H:%i:%s') where id = ?")

/**
*jdbcType = DATE时,只传入了年月日
*/
@Update("update tb set createTime = #{param, jdbcType=DATE} where id = ?")
/**
*jdbcType = TIMESTAMP,年月日+ 时分秒
*/
@Update("update tb set createTime = #{param, jdbcType=TIMESTAMP } where id = ?")