Spring---Mybatis和Spring整合
Posted tqsh
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第一步:创建数据库
mysql代码
1 CREATE DATABASE `mybatis` ; 2 3 USE `mybatis`; 4 5 CREATE TABLE `user` ( 6 `id` INT(20) NOT NULL, 7 `name` VARCHAR(30) DEFAULT NULL, 8 `pwd` VARCHAR(30) DEFAULT NULL, 9 PRIMARY KEY (`id`) 10 ) ENGINE=INNODB DEFAULT CHARSET=utf8; 11 12 INSERT INTO `user`(`id`,`name`,`pwd`) 13 VALUES (1,‘闪电侠‘,‘123‘),(2,‘蜘蛛侠‘,‘abc‘),(3,‘钢铁侠‘,‘520‘);
第二步:创建一个Maven项目
导入相关架包
- junit
- mybaits
- mysql连接驱动
- Spring
- spring-jdbc
- mybatis-spring
1 <dependencies> 2 <!--junit 单元测试--> 3 <dependency> 4 <groupId>junit</groupId> 5 <artifactId>junit</artifactId> 6 <version>4.11</version> 7 </dependency> 8 9 <!--mybaits--> 10 <dependency> 11 <groupId>org.mybatis</groupId> 12 <artifactId>mybatis</artifactId> 13 <version>3.4.6</version> 14 </dependency> 15 16 <!--mysql连接驱动--> 17 <dependency> 18 <groupId>mysql</groupId> 19 <artifactId>mysql-connector-java</artifactId> 20 <version>5.1.47</version> 21 </dependency> 22 23 <!--Spring的包--> 24 <dependency> 25 <groupId>org.springframework</groupId> 26 <artifactId>spring-webmvc</artifactId> 27 <version>4.3.9.RELEASE</version> 28 </dependency> 29 30 <!--spring-jdbc --> 31 <dependency> 32 <groupId>org.springframework</groupId> 33 <artifactId>spring-jdbc</artifactId> 34 <version>4.3.9.RELEASE</version> 35 </dependency> 36 37 <!--mybatis-spring--> 38 <dependency> 39 <groupId>org.mybatis</groupId> 40 <artifactId>mybatis-spring</artifactId> 41 <version>1.3.2</version> 42 </dependency> 43 </dependencies> 44 45 <build> 46 <!--希望maven在导出项目的时候,能够将我们的配置及资源导出--> 47 <resources> 48 <resource> 49 <directory>src/main/java</directory> 50 <includes> 51 <include>**/*.properties</include> 52 <include>**/*.xml</include> 53 </includes> 54 <filtering>false</filtering> 55 </resource> 56 <resource> 57 <directory>src/main/resources</directory> 58 <includes> 59 <include>**/*.properties</include> 60 <include>**/*.xml</include> 61 </includes> 62 <filtering>false</filtering> 63 </resource> 64 </resources> 65 </build>
第三步:创建实体类
1 public class User 2 3 private int id; 4 private String name; 5 private String pwd; 6 7 public User() 8 9 10 public User(int id, String name, String pwd) 11 this.id = id; 12 this.name = name; 13 this.pwd = pwd; 14 15 16 public int getId() 17 return id; 18 19 20 public void setId(int id) 21 this.id = id; 22 23 24 public String getName() 25 return name; 26 27 28 public void setName(String name) 29 this.name = name; 30 31 32 public String getPwd() 33 return pwd; 34 35 36 public void setPwd(String pwd) 37 this.pwd = pwd; 38 39 40 @Override 41 public String toString() 42 return "User" + 43 "id=" + id + 44 ", name=‘" + name + ‘\\‘‘ + 45 ", pwd=" + pwd + 46 ‘‘; 47 48
第四步:创建接口和实现类
接口UserMapper
1 public interface UserMapper 2 3 List<User> getUser(); 4 5
实现类UserMapper.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper 3 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 4 "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 5 6 <!--mapper标签的namespace对应Mapper接口的类--> 7 <mapper namespace="com.shandx.dao.UserMapper"> 8 9 <select id="getUser" resultType="User"> 10 select * from user 11 </select> 12 13 </mapper>
第五步:配置mybatis文件
在resources下创建mybatis-config.xml文件,简单的设置别名和mapper映射文件
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE configuration 3 PUBLIC "-//mybatis.org//DTD Config 3.0//EN" 4 "http://mybatis.org/dtd/mybatis-3-config.dtd"> 5 <configuration> 6 7 <!--别名--> 8 <typeAliases> 9 <package name="com.shandx.pojo"/> 10 </typeAliases> 11 12 <!--关联映射文件--> 13 <mappers> 14 <mapper resource="com/shandx/dao/UserMapper.xml"/> 15 </mappers> 16 17 </configuration>
第六步:编写spring配置文件
在resources创建beans-config.xml文件
1.数据源配置
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://www.springframework.org/schema/beans 5 http://www.springframework.org/schema/beans/spring-beans.xsd"> 6 7 <!--1.配置数据源--> 8 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 9 <property name="driverClassName" value="com.mysql.jdbc.Driver"/> 10 <property name="url" value="jdbc:mysql://localhost:3306/mybatis? 11 useSSL=true&useUnicode=true&characterEncoding=utf-8"/> 12 <property name="username" value="root"/> 13 <property name="password" value="123456"/> 14 </bean> 15 16 </beans>
2.sqlSessionFactory配置
1 <!--2.配置SqlSessionFactory--> 2 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 3 <property name="dataSource" ref="dataSource"/> 4 <!--关联mybatis的配置文件--> 5 <property name="configLocation" value="classpath:mybatis-config.xml"/> 6 </bean>
3.sqlSession配置
1 <!--3.创建SqlSession--> 2 <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> 3 <constructor-arg index="0" ref="sqlSessionFactory" /> 4 </bean>
在dao类下创建UserMapperImpl
4.接口实现类增加一个属性:sqlSession
1 public class UserMapperImpl implements UserMapper 2 3 private SqlSessionTemplate sqlSession; 4 5 public void setSqlSession(SqlSessionTemplate sqlSession) 6 this.sqlSession = sqlSession; 7 8 9 public List<User> getUser() 10 11 UserMapper mapper = sqlSession.getMapper(UserMapper.class); 12 return mapper.getUser(); 13 14 15
5.将接口的实现类交给spring来管理
1 <!--4.接口实现类注入SqlSession--> 2 <bean id="UserMapperImpl" class="com.shandx.dao.UserMapperImpl"> 3 <property name="sqlSession" ref="sqlSession"/> 4 </bean>
第七步:测试
1 public class UserMapperTest 2 3 @Test 4 public void getUser() 5 ApplicationContext context = new ClassPathXmlApplicationContext("beans-config.xml"); 6 UserMapper userDaoImpl = (UserMapper) context.getBean("UserMapperImpl"); 7 List<User> users = userDaoImpl.getUser(); 8 for (User user : users) 9 System.out.println(user); 10 11 12
第八步:运行结果
项目结构
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