标签:xml name Spring UserMapper 整合 org MyBatis import public
Spring 整合MyBatis
1.在pom.xml中导入依赖包
导入依赖包后,会自动下载,如果代码一直是红的 刷新Maven就行了
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.49</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.13.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.6</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
</dependencies>
<!--配置Maven静态资源过滤问题!-->
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering><!--防止application.xml被过滤-->
</resource>
</resources>
</build>
先给出完成后的Maven目录,以下建文件的步骤可以参照这个
2.类及接口,Mapper映射文件
编写pojo实体类 User.java
package com.kuang.pojo;
public class User {
//这里属性对应自己数据库user表里的字段,id,name姓名,pwd密码
private int id;
private String name;
private String pwd;
public User() {
}
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;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", pwd='" + pwd + '\'' +
'}';
}
}
UserMapper接口编写
package com.kuang.mapper;
import com.kuang.pojo.User;
import java.util.List;
public interface UserMapper {
public List<User> selectUser();
}
先创建mybatis的创建文件,里面可以配置别名等功能
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>
<!--设置别名,UserMapper.xml的返回值resultType="User"就行了
不用写全路径-->
<typeAliases>
<package name="com.kuang.pojo"/>
</typeAliases>
<!--这里省略,数据源会在Spring的配置文件中配置
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" 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="123456"/>
</dataSource>
</environment>
</environments>
-->
</configuration>
接口对应的Mapper映射文件
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">
<mapper namespace="com.kuang.mapper.UserMapper">
<select id="selectUser" resultType="User">
select * from user
</select>
</mapper>
3.引入Spring配置文件spring-config.xml
重点来了,Spring配置文件:spring-config.xml
里面<bean id=“sqlSessionFactory” 里可以引用mybatis-config.xml跟Mapper.xml文件
spring-config.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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">
<!--DataSource: 使用Spring的数据源替换Mybatis的配置,这里使用Spring提供的JDBC
注意:数据源导入自己数据库信息-->
<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=false&useEncode=true&characterEncode=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="123"/>
</bean>
<!--配置sqlSessionFactory,关联MyBatis-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<property name="mapperLocations" value="classpath:com/kuang/mapper/*.xml"/>
</bean>
<!--就是我们使用的sqlSession,注册sqlSessionTemplate,关联sqlSessionFactory-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--只能用构造器注入sqlSessionFactory,因为它没有set方法-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
</beans>
4.增加接口的实现类
增加UserMapper接口的实现类,私有化sqlSessionTemplate
UserMapperImpl.java
package com.kuang.mapper;
import com.kuang.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class UserMapperImpl implements UserMapper {
//sqlSession不用我们自己创建了,Spring来管理
private SqlSessionTemplate sqlSession;
public void setSqlSession(SqlSessionTemplate sqlSession) {
this.sqlSession = sqlSession;
}
public List<User> selectUser() {
UserMapper mapper = sqlSession.getMapper(UserMapper.class);
return mapper.selectUser();
}
}
5.注册bean实现
创建一个新的applicationContext.xml,import标签导入spring-config.xml,再编写bean的实现
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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="spring-config.xml"/>
<!--把实现类UserMapperImpl 注入到容器bean中,sqlSession是参数-->
<bean id="userMapper" class="com.kuang.mapper.UserMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
6.测试
MyTest.java
import com.kuang.mapper.UserMapper;
import com.kuang.pojo.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class MyTest {
@Test
public void test(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
UserMapper userMapper = context.getBean("userMapper",UserMapper.class);
for (User user : userMapper.selectUser()) {
System.out.println(user);
}
}
}
连接数据库,打开数据库中的表
运行结果就是打印数据库user表中的数据
上述步骤亲测可运行,以上案例参考了狂神老师微信公众号 狂神说 上面的文章笔记
标签:xml,name,Spring,UserMapper,整合,org,MyBatis,import,public 来源: https://blog.csdn.net/fllow_wind/article/details/114802087
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。