一分钟了解Mybatis Puls

睿智杰哥j 04-13 125

前言：

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1.官网

MyBatis-Plus

可查看官方文档

官网地址:

2.加入依赖包

Spring Boot项目如下：

<dependency>    <groupId>com.baomidou</groupId>    <artifactId>mybatis-plus-boot-starter</artifactId>    <version>3.5.2</version></dependency>在配置文件加如下配置mybatis-plus.type-aliases-package=com.beiyou.entitymybatis.mapper-locations = classpath:mapper/*Mapper.xmlXML

Spring MVC 项目如下

  <dependency>      <groupId>com.baomidou</groupId>      <artifactId>mybatis-plus</artifactId>      <version>3.5.3.1</version>    </dependency>XML

   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="com.baomidou.mybatisplus.samples.quickstart.mapper"/>    </bean>    <bean id="sqlSessionFactory" class="com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean">        <property name="dataSource" ref="dataSource"/>    </bean>XML

3.配置（必须）

4.Model

@TableName("account")public class Account {    private Integer id;    @TableField("name")    private String name;    private BigDecimal money;}Java

5.使用

@Mapperpublic interface AccountMapper extends BaseMapper<Account> {}Java

6.使用单元测试测试

    <dependency>      <groupId>org.springframework</groupId>      <artifactId>spring-test</artifactId>      <version>5.3.2</version>    </dependency>    <dependency>      <groupId>org.junit.jupiter</groupId>      <artifactId>junit-jupiter-api</artifactId>      <version>5.6.0</version>      <scope>test</scope>    </dependency>XML

   @Autowired    private UserMapper userMapper;       @Autowired    private TukuMapper tukuMapper;    @Test    void test4() {        Tuku tuku1 = new Tuku();        tuku1.setId(3);        tukuMapper.deleteById(tuku1);        tukuMapper.deleteById(2);        tukuMapper.deleteBatchIds(CollUtil.newArrayList(1,2,3));        UpdateWrapper<Tuku> wapper = Wrappers.update();        wapper.eq("id",3);        tukuMapper.delete(wapper);    }    @Test    void test3() {        Tuku tuku1 = new Tuku();        tuku1.setId(3);        tuku1.setImg("艳杰2.gif");        //int i = tukuMapper.updateById(tuku1);        //UpdateWrapper<Tuku> wapper = new UpdateWrapper<>();        UpdateWrapper<Tuku> wapper = Wrappers.update();        wapper.set("img","艳杰300.gif");        wapper.eq("id",3);        //int update = tukuMapper.update(null, wapper);        LambdaUpdateWrapper<Tuku> wapper3 = new LambdaUpdateWrapper<>();        wapper3.set(Tuku::getImg,"艳杰400.gif");        wapper3.eq(Tuku::getId,3);        int update3 = tukuMapper.update(null, wapper3);    }    @Test    void test2() {        QueryWrapper wapper = new QueryWrapper<Tuku>();        //wapper.eq("img","张北.gif");        Integer minId = null;        //where 后面 加这个 id > xx        wapper.ge(minId != null, "id", minId);        wapper.like("img", "强");        LambdaQueryWrapper<Tuku> wapper2 = new LambdaQueryWrapper();        wapper2.like(Tuku::getImg, "强");        List<Tuku> userList = tukuMapper.selectList(wapper2);        userList.forEach(System.out::println);    }    @Test    void test1() {        List<UserEntity> userList = userMapper.selectList(null);        userList.forEach(System.out::println);    }Java

结尾

MyBatis-Plus 官方文档: