1. 在实体类的属性上加入@TableField注解,指定自动填充的策略
@TableField(fill = FieldFill.INSERT) //插入时填充字段
private LocalDateTime createTime;
@TableField(fill = FieldFill.INSERT_UPDATE) //插入和更新时填充字段
private LocalDateTime updateTime;
@TableField(fill = FieldFill.INSERT) //插入时填充字段
private Long createUser;
@TableField(fill = FieldFill.INSERT_UPDATE) //插入和更新时填充字段
private Long updateUser;
2. 编写基于ThreadLocal封装的工具类BaseContext,用于保存用户id
/**
* 基于ThreadLocal封装工具类,用于保存和获取当前登录用户id
*/
public class BaseContext {
private static ThreadLocal<Long> threadLocalUserId = new ThreadLocal<>();
/**
* 设置值
* @param id
*/
public static void setCurrentId(Long id){
threadLocalUserId.set(id);
}
/**
* 获取值
* @return
*/
public static Long getCurrentId(){
return threadLocalUserId.get();
}
}
3. 在LoginCheckFilter的doFilter方法中调用BaseContext来设置当前登录用户的id
//4-1、判断登录状态,如果已登录,则直接放行
if (request.getSession().getAttribute("employee") != null) {
log.info("用户已登录,用户id为:{}", request.getSession().getAttribute("employee"));
Long empId = (Long) request.getSession().getAttribute("employee");
BaseContext.setCurrentId(empId);
filterChain.doFilter(request, response);
return;
}
//4-2、判断登录状态,如果已登录,则直接放行
if (request.getSession().getAttribute("user") != null) {
log.info("用户已登录,用户id为:{}", request.getSession().getAttribute("user"));
Long userId = (Long) request.getSession().getAttribute("user");
BaseContext.setCurrentId(userId);
filterChain.doFilter(request, response);
return;
}
import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;
import java.time.LocalDateTime;
/**
* 自定义元数据对象处理器
*/
@Component
@Slf4j
public class MyMetaObjecthandler implements MetaObjectHandler {
/**
* 插入操作,自动填充
* @param metaObject
*/
@Override
public void insertFill(MetaObject metaObject) {
log.info("公共字段自动填充[insert]...");
log.info(metaObject.toString());
metaObject.setValue("createTime", LocalDateTime.now());
metaObject.setValue("updateTime",LocalDateTime.now());
metaObject.setValue("createUser",BaseContext.getCurrentId());//在MyMetaObjectHandler的方法中调用BaseContext获取登录用户的id
metaObject.setValue("updateUser",BaseContext.getCurrentId());//在MyMetaObjectHandler的方法中调用BaseContext获取登录用户的id
}
/**
* 更新操作,自动填充
* @param metaObject
*/
@Override
public void updateFill(MetaObject metaObject) {
log.info("公共字段自动填充[update]...");
log.info(metaObject.toString());
long id = Thread.currentThread().getId();
log.info("线程id为:{}",id);
metaObject.setValue("updateTime",LocalDateTime.now());
metaObject.setValue("updateUser",BaseContext.getCurrentId());//在MyMetaObjectHandler的方法中调用BaseContext获取登录用户的id
}
}