整合mybatis和spring（採用idea）
阿新 • • 發佈：2020-12-22
1.在pox.xml匯入一下包
下面的build是解決maven靜態資源過濾問題。
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</ 2.新建包名和檔案!
總體如下圖所示
resource下建立applicationcontext.xml,mybatis-config.xml,spring-dao.xml。
mybatis-config.xml原始碼如下：
<?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>
<!-- 開啟mybatis的自帶日誌服務-->
<settings>
<setting name="logImpl" value="STDOUT_LOGGING "/>
</settings>
<typeAliases>
<!-- 採用了別名-->
<typeAlias type="com.tg.mapper.PersonMapper" alias="person"/>
</typeAliases>
<mappers>
<!-- 使用對映器介面實現類的完全限定類名 -->
<mapper class="com.tg.mapper.PersonMapper"/>
</mappers>
</configuration>
applicationcontext.xml
主要是用來註冊bean。
<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"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
<import resource="spring-dao.xml"/>
<bean id="personMapper" class="com.tg.mapper.PersonMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
<bean id="personMapper2" class="com.tg.mapper.PersonMapperImpl2">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
spring-dao.xml
這個配置檔案裡面替換了mybatis的資料來源，DateSorce替換了mybatis的資料來源，所以mybatis的配置檔案裡不需要載入資料來源，mybatis裡用的是sqlseession方法，需要sqlseessionFacotry構建sqlseession，同樣spring接管也需要如此做，先註冊一個sqlSessionFactory的bean，在裡面配置mybatis的配置檔案，但是spring中不是用的sqlSession，而是SqlSessionTemplate，我們將使用SqlSessionTemplate來完成mapper的呼叫。
<?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"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--DateSource替換mybatis的資料來源-->
<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=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!--sqlseessionFacotry-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--繫結mybatis配置檔案-->
<property name="configLocation" value="mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/tg/mapper/*.xml"/>
</bean>
<!-- SqlSessionTemplate就是我們使用的方法-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!-- sqlSessionFactory使用構造器注入，因為沒有set方法-->
<constructor-arg index="0" value="sqlSessionFactory"/>
</bean>
</beans>
3.實體類
配置檔案寫好了就是實體類的建立，在pojo下建立一個Person的實體類。
public class Person {
private int id;
private String name;
private int age;
public Person() {
}
public Person(int id, String name, int age) {
this.id = id;
this.name = name;
this.age = age;
}
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 int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
@Override
public String toString() {
return "Person{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
'}';
}
}
4.寫service的方法
PersonMapper
public interface PersonMapper {
public List<Person> selectPerson();
}
PersonMapper.xml
<?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.tg.mapper.PersonMapper">
<select id="selectPerson" resultType="person">
select * from person;
</select>
</mapper>
PersonMapperImpl
public class PersonMapperImpl implements PersonMapper{
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
private SqlSessionTemplate sqlSession;
//使用SqlSessionTemplate來實現所有操作
public List<Person> selectPerson() {
PersonMapper mapper = sqlSession.getMapper(PersonMapper.class);
return mapper.selectPerson();
}
}
5.測試
在測試包建立測試檔案
測試檔案隨意命名，但是不能和Test同名。
public class Mytest {
@Test
public void test() throws IOException {
//獲取容器
ApplicationContext context = new ClassPathXmlApplicationContext("applicationcontext.xml");
//獲得mapper
PersonMapper mapper = context.getBean("personMapper", PersonMapper.class);
for (Person person : mapper.selectPerson()) {
System.out.println(person);
}
}
}
以上就是整合mybatis和spring的一個小專案，spring是針對bean的生命週期進行管理的輕量級容器（lightweight container）。以上僅為個人見解，如有不足，還請見諒！！！！