H5的一些筆記
阿新 • • 發佈:2021-10-25
1.所需目錄
2.配置porn.xml
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>springTest</artifactId> <groupId>com.shao</groupId> <version>1.0-SNAPSHOT</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>test10</artifactId> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.9</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.1</version> </dependency> <!--spring操作資料庫的話還需要spring-jdbc--> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.5</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.6</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.22</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>5.2.5.RELEASE</version> </dependency> </dependencies> <build> <resources> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false </filtering> </resource> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false </filtering> </resource> </resources> </build> </project>
3.建立實體類
package com.shao.pojo;
import lombok.Data;
@Data
public class User {
private int id;
private String name;
private String password;
}
4.Dao層和mapper
UserMapper介面
package com.shao.mapper; import com.shao.pojo.User; import java.util.List; public interface UserMapper { public List<User> selectUser(); }
UserMapperImpl
package com.shao.mapper; import com.shao.pojo.User; import org.mybatis.spring.SqlSessionTemplate; import java.util.List; public class UserMapperImpl implements UserMapper { //現在都是用SqlSessionTemplate private SqlSessionTemplate sqlSession; public void setSqlSession(SqlSessionTemplate sqlSession) { this.sqlSession = sqlSession; } @Override public List<User> selectUser() { UserMapper mapper = sqlSession.getMapper(UserMapper.class); return mapper.selectUser(); } }
UserMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--namespace繫結一個dao/mapper介面 -->
<mapper namespace="com.shao.mapper.UserMapper">
<select id="selectUser" resultType="User">
select * from user
</select>
</mapper>
5.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>
<!-- JavaBean型別自動對映掃描包配置 Java類型別名 -->
<typeAliases>
<package name="com.shao.pojo"/>
<!--<typeAlias alias="User" type="com.brok1n.web.java.springmvcdemo1.bean.User" />-->
</typeAliases>
<!--設定-->
<!-- 對映器 , 每一個mapper.xml都需要在mybatis-config中註冊-->
<mappers>
<mapper class="com.shao.mapper.UserMapper"/>
</mappers>
</configuration>
6.spring-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop-4.2.xsd">
<!--spring整合mybatis-->
<!--DataSounrce: 使用spring的資料來源替換Mybatis的位置-->
<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="333"/>
</bean>
<!--SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--繫結Mybatis配置檔案-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/shao/mapper/*.xml"/>
</bean>
<!--SqlSessionTemplate就是我們使用sqlsession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--只能使用構造器注入,因為沒有set方法-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
<bean id="userMapper" class="com.shao.mapper.UserMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
7.application-config.xml
<import resource="spring-dao.xml"/>
8.工具類建立
package com.shao.utils;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import java.io.IOException;
import java.io.InputStream;
public class MyBatisUtils {
private static SqlSessionFactory sqlSessionFactory;
static {
try {
//獲取SQLSessionFactory
String resoure = "mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resoure);
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
} catch (IOException e) {
e.printStackTrace();
}
}
public static SqlSession getSqlSession(){
return sqlSessionFactory.openSession();
}
}
9.測試
package com.shao.mapper;
import com.shao.pojo.User;
import com.shao.utils.MyBatisUtils;
import junit.framework.TestCase;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;
public class UserMapperTest {
@Test
public void testSelectUser() {
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = (UserMapper) context.getBean("userMapper");
List<User> userList = userMapper.selectUser();
for (User user : userList) {
System.out.println(user);
}
}
}
主要是給自己看的,所以肯定會出現很多錯誤哈哈哈哈哈