Spring 整合Mybatis的配置文件

太过爱你忘了你带给我的痛 2021-09-21 16:02 317阅读 0赞

### 目录 ###

*  编写配置文件
 *   *  mybatis-config.xml
     *  spring-dao.xml
 *  sqlSession 注入到实现类中的两种方式
 *   *  第一种 set方法注入类
     *  第二种 继承 SqlSessionDaoSupport
 *  测试
 *  依赖

# 编写配置文件 #

## mybatis-config.xml ##

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
    
        <typeAliases>
            <package name="com.pro.pojo"/>
        </typeAliases>
    
    </configuration>

## spring-dao.xml ##

注意这里需要绑定上面的 mybatis-config.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" xsi:schemaLocation="http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd">
    
        
        <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&useUnicode=true&characterEncoding=utf8"/>
            <property name="username" value="root"/>
            <property name="password" value="123456"/>
        </bean>
    
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            
            <property name="configLocation" value="classpath:mybatis-config.xml"/>
            
            <property name="mapperLocations" value="classpath:com/pro/dao/*.xml"/>
        </bean>
    
        
        <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
            
            <constructor-arg index="0" ref="sqlSessionFactory"/>
        </bean>
    
    	
        
        <bean id="userMapper" class="com.pro.dao.UserMapperImpl">
            <property name="sqlSession" ref="sqlSession"/>
        </bean>
    
        
        <bean id="userMapper2" class="com.pro.dao.UserMapperImpl2">
            
            
            <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
        </bean>
    
    </beans>

# sqlSession 注入到实现类中的两种方式 #

## 第一种 set方法注入类 ##

这个类需要在Spring容器中注入

public class UserMapperImpl implements UserMapper { 
        // 在原来我们使用 sqlSession, 现在都使用 sqlSessionTemplate
        private SqlSessionTemplate sqlSession;
    
        public void setSqlSession(SqlSessionTemplate sqlSession) { 
            this.sqlSession = sqlSession;
        }
    
        @Override
        public List<User> getUserList() { 
            UserMapper mapper = sqlSession.getMapper(UserMapper.class);
            return mapper.getUserList();
        }
    }

## 第二种 继承 SqlSessionDaoSupport ##

这个类需要在Spring容器中注入

public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper { 
    
        @Override
        public List<User> getUserList() { 
        	// 继承 SqlSessionDaoSupport 类之后, 可以直接拿到 getSqlSession()
            SqlSession sqlSession = getSqlSession();
            UserMapper mapper = sqlSession.getMapper(UserMapper.class);
            return mapper.getUserList();
        }
    }

# 测试 #

import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class MyTest { 
        @Test
        public void getUserList() throws IOException { 
            ApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
            // 测试set注入
    // UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
            // 测试继承 SqlSessionDaoSupport 类
            UserMapper userMapper = context.getBean("userMapper2", UserMapper.class);
            for (User user : userMapper.getUserList()) { 
                System.out.println(user);
            }
        }
    }

# 依赖 #

<dependencies>
        
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
        </dependency>
        
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>
        
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.2</version>
        </dependency>
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.0.RELEASE</version>
        </dependency>
        
        
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.0.RELEASE</version>
        </dependency>
        
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>
        
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.10</version>
        </dependency>
    </dependencies>
    
    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>