自动填充

就是createTime一类的，在修改或者添加的时候自动修改数据

FieldFill

注解：

1	@TableField(fill = FieldFill.INSERT)

package com.baomidou.mybatisplus.annotation;
//在什么时候有用
public enum FieldFill {
    DEFAULT,
    INSERT,
    UPDATE,
    INSERT_UPDATE;

    private FieldFill() {
    }
}

注释处理：

package com.saxon.mybatis_plus.hander;

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.LocalDate;
import java.util.Date;
@Component
@Slf4j
public class MyMybatishandle implements MetaObjectHandler {
    @Override
    public void insertFill (MetaObject metaObject) {
        log.info ("enter ....");
        this.strictInsertFill (metaObject,"createTime", Date.class,new Date ());
    }

    @Override
    public void updateFill (MetaObject metaObject) {
        this.strictUpdateFill (metaObject,"ModifyTime", Date.class,new Date ());

    }
}

乐观锁插件

使用代码：

添加插件也是这个办法

package com.saxon.mybatis_plus.config;

import com.baomidou.mybatisplus.autoconfigure.MybatisPlusAutoConfiguration;
import com.baomidou.mybatisplus.extension.plugins.OptimisticLockerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration
@EnableTransactionManagement
public class MybatisPlusConfig {
    @Bean
    public OptimisticLockerInterceptor getOptimisticLockerInterceptor () {
        return new OptimisticLockerInterceptor ();
    }
}