將springboot專案打成war包
阿新 • • 發佈：2022-03-17
Spring整合Mybatis
匯入依賴
<dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.6</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.3.13</version> </dependency> <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.6</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.3.13</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13.2</version> <scope>test</scope> </dependency> <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.7</version> </dependency> </dependencies>
使用Spring建立SqlSessionTemplate物件(用途和SqlSession一樣)
<?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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!-- 使用Spring的資料來源替換Mybatis的配置 --> <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=false&useUnicode=true&characterEncoding=utf8"/> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <property name="username" value="root"/> <property name="password" value="123456"/> </bean> <!--SqlSessionFactory--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!--資料庫配置--> <property name="dataSource" ref="datasource"/> <!--繫結Mybatis配置檔案--> <property name="configLocation" value="mybatis-config.xml"/> <!--繫結對映--> <property name="mapperLocations" value="com/mybatis/mapper/*.xml"/> </bean> <!--SqlSessionTemplate：就是以前使用的sqlSession--> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <!--因為原始碼沒有set方法，所以使用有參構造--> <constructor-arg index="0" ref="sqlSessionFactory"/> </bean> </beans>
整合到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:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <import resource="spring-dao.xml"/> <!--將SqlSessionTemplate注入實現類--> <bean id="UserMapperImpl" class="com.mybatis.mapper.impl.UserMapperImpl"> <!--注入SqlSessionTemplate(需要建立)--> <property name="sqlSession" ref="sqlSession"/> </bean> <bean id="UserMapperImpl2" class="com.mybatis.mapper.impl.UserMapperImpl2"> <!--注入SqlSessionFactory(不用建立SqlSessionTemplate)--> <property name="sqlSessionFactory" ref="sqlSessionFactory"/> </bean> </beans>
此時可以留著mybatis-config.xml做一些簡單配置
<?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>
<!--起別名-->
<typeAliases>
<package name="com.mybatis.beans"/>
</typeAliases>
</configuration>
實體類
public class User {
private int id;
private String name;
private String pwd;
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", pwd='" + pwd + '\'' +
'}';
}
public User() {
}
public User(int id, String name, String pwd) {
this.id = id;
this.name = name;
this.pwd = pwd;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
}
介面
public interface UserMapper {
List<User> selectAllUsers();
}
介面的對映檔案
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mybatis.mapper.UserMapper">
<select id="selectAllUsers" resultType="User">
select *
from `user`;
</select>
</mapper>
方式一
介面實現類
public class UserMapperImpl implements UserMapper {
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
@Override
public List<User> selectAllUsers() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
List<User> users = mapper.selectAllUsers();
return users;
}
}
方式二（繼承 SqlSessionDaoSupport）
public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper {
@Override
public List<User> selectAllUsers() {
UserMapper mapper = getSqlSessionTemplate().getMapper(UserMapper.class);
List<User> users = mapper.selectAllUsers();
return users;
}
}
測試類
public class MyTest {
@Test
public void test01() {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("UserMapperImpl", UserMapperImpl.class);
List<User> users = userMapper.selectAllUsers();
for (User user : users) {
System.out.println(user);
}
}
@Test
public void test02() {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("UserMapperImpl2", UserMapperImpl2.class);
List<User> users = userMapper.selectAllUsers();
for (User user : users) {
System.out.println(user);
}
}
}