MyBatisPlus--集成Spring

我会带着你远行 2021-08-26 21:50 481阅读 0赞

#### 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>
            
            <dependency>
                <groupId>com.baomidou</groupId>
                <artifactId>mybatis-plus</artifactId>
                <version>3.1.1</version>
            </dependency>
            
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.47</version>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.0.11</version>
            </dependency>
    
            
            <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"/>
    
        
        <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>
    
        
        <bean id="sqlSessionFactory" class="com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
        </bean>
    
        
        <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)