前言
在日常的插入和修改的时候要频繁的插入时间,浪费时间,可以通过实现mybatis的 Intercepts注解来实现,获取实体,并且在实体里面插入日期
一、实现Interceptor接口,并写相关逻辑
package com.ruoyi.common.filter; import com.ruoyi.common.core.domain.BaseEntity; import com.ruoyi.common.exception.base.BaseException; import com.ruoyi.common.utils.SecurityUtils; import org.apache.ibatis.executor.Executor; import org.apache.ibatis.mapping.MappedStatement; import org.apache.ibatis.mapping.SqlCommandType; import org.apache.ibatis.plugin.*; import org.springframework.stereotype.Component; import java.util.Date; import java.util.Properties; /** * Executor (update, query, flushStatements, commit, rollback, getTransaction, close, isClosed) 拦截执行器的方法 ParameterHandler (getParameterObject, setParameters) 拦截参数的处理 ResultSetHandler (handleResultSets, handleOutputParameters) 拦截结果集的处理 StatementHandler (prepare, parameterize, batch, update, query) 拦截Sql语法构建的处理 * @author Administrator * */ @Intercepts({@Signature(type = Executor.class,method = "update",args = {MappedStatement.class,Object.class})}) @Component public class HandleTimeInterceptor implements Interceptor { @Override public Object intercept(Invocation invocation) throws Throwable { Object[] args = invocation.getArgs(); MappedStatement mappedStatement = (MappedStatement) args[0]; SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType(); if(sqlCommandType== SqlCommandType.UPDATE) { if(args[1] instanceof BaseEntity) { BaseEntity baseEntity = (BaseEntity) args[1]; baseEntity.setUpdateTime(new Date()); String userId=""; try { userId= SecurityUtils.getUserId().toString(); }catch (Exception e){ // throw new BaseException("当前没有登录人"); } baseEntity.setUpdateBy(userId); } }else if(sqlCommandType==SqlCommandType.INSERT) { if(args[1] instanceof BaseEntity) { BaseEntity baseEntity = (BaseEntity) args[1]; baseEntity.setCreateTime(new Date()); String userId=""; try { userId= SecurityUtils.getUserId().toString(); }catch (Exception e){ //throw new BaseException("当前没有登录人"); } baseEntity.setCreateBy(userId); } } return invocation.proceed(); } @Override public Object plugin(Object target) { return Plugin.wrap(target, this); } @Override public void setProperties(Properties properties) { } }
二、将插件注册到mybatis 的配置文件 mybatis-config.xml
总结
然后就可以实现在实体里面自动设置创建时间和修改时间
以上为个人经验,希望能给大家一个参考,也希望大家多多支持IT俱乐部。