Mybatis-Plus使用MetaObjectHandler实现自动填充实体对象字段

package com.chinaunicom.medical.ihm.core.model;
 
import com.baomidou.mybatisplus.annotation.*;
import com.fasterxml.jackson.annotation.JsonFormat;
 
import java.time.LocalDateTime;
import java.util.Date;
 
public class BaseModel extends IdModel {
    @TableField(fill = FieldFill.INSERT)
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private LocalDateTime createTime;
 
    @TableField(fill = FieldFill.INSERT)
    private String createBy;
 
    @TableField(fill = FieldFill.INSERT_UPDATE)
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
    private LocalDateTime updateTime;
 
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private String updateBy;
 
    @Version
    @TableField(fill = FieldFill.INSERT)
    private Integer version;
 
    @TableLogic
    @TableField(fill = FieldFill.INSERT)
    private Integer deleted;
 
    public String getCreateBy() {
        return createBy;
    }
 
    public void setCreateBy(String createBy) {
        this.createBy = createBy;
    }
 
    public String getUpdateBy() {
        return updateBy;
    }
 
    public void setUpdateBy(String updateBy) {
        this.updateBy = updateBy;
    }
 
    public Integer getDeleted() {
        return deleted;
    }
 
    public void setDeleted(Integer deleted) {
        this.deleted = deleted;
    }
 
    public Integer getVersion() {
        return version;
    }
 
    public void setVersion(Integer version) {
        this.version = version;
    }
 
    public LocalDateTime getCreateTime() {
        return createTime;
    }
 
    public void setCreateTime(LocalDateTime createTime) {
        this.createTime = createTime;
    }
 
    public LocalDateTime getUpdateTime() {
        return updateTime;
    }
 
    public void setUpdateTime(LocalDateTime updateTime) {
        this.updateTime = updateTime;
    }
}

package com.chinaunicom.medical.ihm.core.model;
 
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import com.chinaunicom.medical.ihm.core.context.SysContextHolder;
import org.apache.ibatis.reflection.MetaObject;
 
import java.time.LocalDateTime;
import java.util.Optional;
 
@Component
public class DateMetaObjectHandler implements MetaObjectHandler {
    private String createTimeField = "createTime";
    private String updateTimeField = "updateTime";
    private String createByField = "createBy";
    private String updateByField = "updateBy";
    private String versionField = "version";
    private String deletedField = "deleted";
    private String appIdField = "appId";
    private String tenantIdField = "tenantId";
    private String instanceIdField = "instanceId";
 
    @Override
    public void insertFill(MetaObject metaObject) {
        this.strictInsertFill(metaObject, createTimeField, LocalDateTime.class, LocalDateTime.now());
        this.strictInsertFill(metaObject, updateTimeField, LocalDateTime.class, LocalDateTime.now());
        this.strictInsertFill(metaObject, versionField, Integer.class, 0);
        this.strictInsertFill(metaObject, deletedField, Integer.class, 0);
 
        this.strictInsertFill(metaObject, createByField, String.class, String.valueOf(Optional.ofNullable(SysContextHolder.getUserId()).orElse(0L)));
        this.strictInsertFill(metaObject, updateByField, String.class, String.valueOf(Optional.ofNullable(SysContextHolder.getUserId()).orElse(0L)));
 
//        this.strictInsertFill(metaObject, appIdField, Long.class, SysContextHolder.getApp());
//        this.strictInsertFill(metaObject, tenantIdField, Long.class, SysContextHolder.getTenant());
//        this.strictInsertFill(metaObject, instanceIdField, Long.class, SysContextHolder.getApplication());
    }
 
 
    @Override
    public void updateFill(MetaObject metaObject) {
        setFieldValByName(updateTimeField, LocalDateTime.now(), metaObject);
        setFieldValByName(updateByField, String.valueOf(Optional.ofNullable(SysContextHolder.getUserId()).orElse(0L)), metaObject);
 
    }
}