1 pom.xml 添加依赖 数据库包要对应版本
2 <dependencies>
3 <dependency>
4 <groupId>junit</groupId>
5 <artifactId>junit</artifactId>
6 <version>4.12</version>
7 </dependency>
8 <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
9 <dependency>
10 <groupId>mysql</groupId>
11 <artifactId>mysql-connector-java</artifactId>
12 <version>5.1.47</version>
13 </dependency>
14 <dependency>
15 <groupId>org.mybatis</groupId>
16 <artifactId>mybatis</artifactId>
17 <version>3.5.2</version>
18 </dependency>
19 <dependency>
20 <groupId>org.springframework</groupId>
21 <artifactId>spring-webmvc</artifactId>
22 <version>5.2.0.RELEASE</version>
23 </dependency>
24 <!--spring操作数据库的话，还需要一个spring-jdbc-->
25 <dependency>
26 <groupId>org.springframework</groupId>
27 <artifactId>spring-jdbc</artifactId>
28 <version>5.2.0.RELEASE</version>
29 </dependency>
30 <dependency>
31 <groupId>org.aspectj</groupId>
32 <artifactId>aspectjweaver</artifactId>
33 <version>1.8.13</version>
34 </dependency>
35 <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
36 <dependency>
37 <groupId>org.mybatis</groupId>
38 <artifactId>mybatis-spring</artifactId>
39 <version>2.0.3</version>
40 </dependency>
41 <dependency>
42 <groupId>org.projectlombok</groupId>
43 <artifactId>lombok</artifactId>
44 <version>1.18.10</version>
45 </dependency>
46 </dependencies>
47 资源过滤
48 <build>
49 <resources>
50 <resource>
51 <directory>src/main/resources</directory>
52 <includes>
53 <include>**/*.properties</include>
54 <include>**/*.xml</include>
55 </includes>
56 </resource>
57 <resource>
58 <directory>src/main/java</directory>
59 <includes>
60 <include>**/*.properties</include>
61 <include>**/*.xml</include>
62 </includes>
63 <filtering>true</filtering>
64 </resource>
65 </resources>
66 </build>
1 实体类
2
3 @Data
4 public class User {
5 private int id;
6 private String name;
7 private String pwd;
8 }
1 接口
2 public interface UserMapper {
3 /*查詢*/
4 List<User> selectUser();
5 }
1 实现类
2 public class UserMapperImpl implements UserMapper {
3
4 //我们的所有操作，在原来都使用Session来执行 现在都使用SqlSessionTemlate
5 private SqlSessionTemplate sqlSession;
6 public void setSqlSession(SqlSessionTemplate sqlSession){
7 this.sqlSession = sqlSession;
8 }
9
10 @Override
11 public List<User> selectUser() {
12 UserMapper mapper = sqlSession.getMapper(UserMapper.class);
13 return mapper.selectUser();
14 }
15 }
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 <mapper namespace="com.rzk.mapper.UserMapper">
6 <select id="selectUser" resultType="user">
7 select * from mybatis.user
8 </select>
9 </mapper>
顺便编写个mybatis的配置文件，加个别名，在Spring也可以做到
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 <!--configguration核心配置文件-->
6 <configuration>
7
8 <!--给实体类起别名-->
9 <typeAliases>
10 <package name="com.rzk.pojo"/>
11 </typeAliases>
12
13 </configuration>
整合mybatis到Spring
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 xmlns:aop="http://www.springframework.org/schema/aop"
5 xsi:schemaLocation="http://www.springframework.org/schema/beans
6 https://www.springframework.org/schema/beans/spring-beans.xsd
7 http://www.springframework.org/schema/aop
8 https://www.springframework.org/schema/aop/spring-aop.xsd">
9
10 <!--DataSource:使用Spring的数据源替换mybatis的配置
11 这里使用Spring提供的JDBC
12 -->
13 <!--jdbc需要导Spring的包-->
14 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
15 <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
16 <property name="url" value="jdbc:mysql://localhost:3306/mybatis?userSSL=true&useUnicode=true&characterEncoding=UTF8"/>
17 <property name="username" value="root"/>
18 <property name="password" value="123456"/>
19 </bean>
20
21
22 <!--sqlSessionFactory-->
23 <!--mybatis方法文档有-->
24 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
25 <property name="dataSource" ref="dataSource"/>
26 <!--绑定Mybatis配置文件-->
27 <!--configLocation：mybatis配置文件的地址-->
28 <property name="configLocation" value="classpath:mybatis-config.xml"/>
29 <!--注册映射器-->
30 <property name="mapperLocations" value="classpath:com/rzk/mapper/*.xml"/>
31 </bean>
32
33 <!--创建sqlSessionFactory SqlSessionTemplate:就是我们使用的SqlSessionFactory -->
34 <!--constructor里面的ref sqlSessionFactory是对应上面bean的id-->
35 <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
36 <constructor-arg index="0" ref="sqlSessionFactory"/>
37 </bean>
38
39 <!--注入-->
40 <bean id="userMapper" class="com.rzk.mapper.UserMapperImpl">
41 <property name="sqlSession" ref="sqlSession"/>
42 </bean>
46 </beans>
测试
1 public class MyTest {
2 @Test
3 public static void main(String[] args)throws IOException {
4 ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
5 UserMapper userMapper = (UserMapper) context.getBean("userMapper2");
6 for (User user : userMapper.selectUser()) {
7 System.out.println(user);
8 }
9 }
10 }
