MyBatisPlus--集成Spring

创建Maven工程，引入依赖

<properties>
        <spring.version>5.1.6.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- mybatis-plus插件 -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.1.1</version>
        </dependency>
        <!-- MySQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        <!-- 连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.11</version>
        </dependency>

        <!-- 简化bean代码的工具包 -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
            <version>1.18.4</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.6.4</version>
        </dependency>
    </dependencies>

	<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

配置文件：
log4j.properties

log4j.rootLogger=DEBUG,A1

log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=[%t] [%c]-[%p] %m%n

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/mbplus?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true&useSSL=false
jdbc.username=root
jdbc.password=123456

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">



    <context:property-placeholder location="jdbc.properties"/>

    <!-- 定义数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="maxActive" value="20"/>
        <property name="minIdle" value="5"/>
    </bean>

    <!-- 使用MP提供的sqlSessionFactory，完成了Spring与MP的整合 -->
    <bean id="sqlSessionFactory" class="com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 扫描mapper接口，MyBatis的原生扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="pers.zhang.mapper"/>
    </bean>

</beans>

User实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
@TableName("tb_user")
public class User {

    private Long id;
    private String userName;
    private String password;
    private String name;
    private Integer age;
    private String email;
}

Mapper

public interface UserMapper extends BaseMapper<User> {}

测试

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class TestMyBatisSpring {


    @Autowired
    UserMapper userMapper;

    @Test
    public void testSelectList(){
        List<User> list = userMapper.selectList(null);
        for (User u : list)
            System.out.println(u);
    }
}

控制台输出：

[main] [pers.zhang.mapper.UserMapper.selectList]-[DEBUG] ==>  Preparing: SELECT id,user_name,password,name,age,email FROM tb_user 
[main] [pers.zhang.mapper.UserMapper.selectList]-[DEBUG] ==> Parameters: 
[main] [pers.zhang.mapper.UserMapper.selectList]-[DEBUG] <==      Total: 5
[main] [org.mybatis.spring.SqlSessionUtils]-[DEBUG] Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@7f2cfe3f]
User(id=1, userName=zhangsan, password=123456, name=张三, age=18, email=test1@qq.com)
User(id=2, userName=lisi, password=123456, name=李四, age=28, email=test2@qq.com)
User(id=3, userName=wangwu, password=123456, name=王五, age=38, email=test3@qq.com)
User(id=4, userName=zhaoliu, password=123456, name=赵六, age=48, email=test4@qq.com)
User(id=5, userName=xiaoqiang, password=123456, name=小强, age=58, email=test5@qq.com)