mybatis-plus:

  # 如果是放在src/main/java目录下 classpath:/com/yourpackage/*/mapper/*Mapper.xml

  # 如果是放在resource目录 classpath:/mapper/*Mapper.xml

  mapper-locations: classpath:/com/huarui/mybatisplus/mapper/*Mapper.xml

  #实体扫描，多个package用逗号或者分号分隔

  typeAliasesPackage: com.huarui.mybatisplus.entity

@SpringBootApplication

@MapperScan("com.huarui.mybatisplus.mapper")

public class Application {

	public static void main(String[] args) {

		SpringApplication.run(Application.class, args);

	}

}

@TableName("tbl_user")

public class User extends Model<User> {

    private static final long serialVersionUID = 1L;

    @TableId(value = "id", type = IdType.ID_WORKER)

    private Long id;

    /**
　　 *

     * 新增 修改时 字段自动填充

     */

    @TableField(fill = FieldFill.INSERT_UPDATE)

    private String name;

}

package com.huarui.mybatisplus.configuration;

import com.baomidou.mybatisplus.mapper.MetaObjectHandler;

import org.apache.ibatis.reflection.MetaObject;

/**

 * Created by lihui on 2019/2/17.

 * 自定义公共字段填充处理器

 */

public class MyMetaObjectHandler extends MetaObjectHandler {

    /**

     * 插入操作 自动填充

     */

    @Override

    public void insertFill(MetaObject metaObject) {

        //获取到需要被填充的字段的值

        Object fieldValue = getFieldValByName("name", metaObject);

        if(fieldValue == null) {

            System.out.println("*******插入操作 满足填充条件*********");

            setFieldValByName("name", "youxiu326", metaObject);

        }

    }

    /**

     * 修改操作 自动填充

     */

    @Override

    public void updateFill(MetaObject metaObject) {

        Object fieldValue = getFieldValByName("name", metaObject);

        if(fieldValue == null) {

            System.out.println("*******修改操作 满足填充条件*********");

            setFieldValByName("name", "youxiu326", metaObject);

        }

    }

}

MyMetaObjectHandler.java

mybatis-plus:

  # 如果是放在src/main/java目录下 classpath:/com/yourpackage/*/mapper/*Mapper.xml

  # 如果是放在resource目录 classpath:/mapper/*Mapper.xml

  mapper-locations: classpath:/com/huarui/mybatisplus/mapper/*Mapper.xml

  #实体扫描，多个package用逗号或者分号分隔

  typeAliasesPackage: com.huarui.mybatisplus.entity

  global-config:

    #主键类型  0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID";

    id-type: 2

    #自定义填充策略接口实现

    meta-object-handler: com.huarui.mybatisplus.configuration.MyMetaObjectHandler

@TableName("tbl_user")

public class User extends Model<User> {

    private static final long serialVersionUID = 1L;

    @TableId(value = "id", type = IdType.ID_WORKER)

    private Long id;

    @TableField("deleteFlag")

    @TableLogic //逻辑删除标志

    private Integer deleteFlag;

}

mybatis-plus:

  # 如果是放在src/main/java目录下 classpath:/com/yourpackage/*/mapper/*Mapper.xml

  # 如果是放在resource目录 classpath:/mapper/*Mapper.xml

  mapper-locations: classpath:/com/huarui/mybatisplus/mapper/*Mapper.xml

  #实体扫描，多个package用逗号或者分号分隔

  typeAliasesPackage: com.huarui.mybatisplus.entity

  global-config:

    #逻辑删除配置（下面3个配置）

    logic-delete-value: -1    #删除状态

    logic-not-delete-value: 1 #未删除状态

    sql-injector: com.baomidou.mybatisplus.mapper.LogicSqlInjector

@EnableTransactionManagement

@Configuration

@MapperScan("com.huarui.mybatisplus.mapper.*")

public class MybatisPlusConfig {

    /**

     * 分页插件

     */

    @Bean

    public PaginationInterceptor paginationInterceptor() {

        return new PaginationInterceptor();

    }

    /**

     * 乐观锁插件

     */

    @Bean

    public OptimisticLockerInterceptor optimisticLockerInterceptor() {

        return new OptimisticLockerInterceptor();

    }

}

@TableName("tbl_employee")

public class Employee extends Model<Employee> {

    private static final long serialVersionUID = 1L;

    /*

	 * @TableId:

	 * 	 value: 指定表中的主键列的列名， 如果实体属性名与列名一致，可以省略不指定.

	 *   type: 指定主键策略.  ID_WORKER 全局唯一ID，内容为空自动填充（默认配置）

	 */

    @TableId(value = "id", type = IdType.ID_WORKER)

    private Long id;

    /**

     * 声明该属性不是数据库中字段

     */

    @TableField(exist = false)

    private String notExist;

    /**

     * 乐观锁版本号

     *  仅支持int,Integer,long,Long,Date,Timestamp

     */

    @Version

    private Integer version;

}

spring:

  profiles:

    #spring boot application.properties文件中引用maven profile节点的值

    active: dev #指定dev环境

package com.huarui.mybatisplus.configuration;

import com.baomidou.mybatisplus.plugins.OptimisticLockerInterceptor;

import com.baomidou.mybatisplus.plugins.PaginationInterceptor;

import com.baomidou.mybatisplus.plugins.PerformanceInterceptor;

import com.baomidou.mybatisplus.plugins.SqlExplainInterceptor;

import org.mybatis.spring.annotation.MapperScan;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.context.annotation.Profile;

import org.springframework.transaction.annotation.EnableTransactionManagement;

/**

 * Created by lihui on 2019/2/17.

 */

@EnableTransactionManagement

@Configuration

@MapperScan("com.huarui.mybatisplus.mapper.*")

public class MybatisPlusConfig {

    /**

     * 分页插件

     */

    @Bean

    public PaginationInterceptor paginationInterceptor() {

        return new PaginationInterceptor();

    }

    /**

     * 性能分析插件

     */

    @Bean

    @Profile({"dev","test"})// 设置 dev test 环境开启

    public PerformanceInterceptor performanceInterceptor () {

        PerformanceInterceptor p =  new PerformanceInterceptor ();

        p.setFormat(true);

        p.setMaxTime(200);
//参数：maxTime SQL 执行最大时长，超过自动停止运行，有助于发现问题。
//参数：format SQL SQL是否格式化，默认false。

        return p;

    }

    /**

     * 乐观锁插件

     */

    @Bean

    public OptimisticLockerInterceptor optimisticLockerInterceptor() {

        return new OptimisticLockerInterceptor();

    }

}