Mybatis-Spring(整合)
1方式一：【SqlSessionTemplate】
1.1创建项目
利用maven搭建普通普通项目
1.2创建数据库
/*
Navicat Premium Data Transfer
Source Server : test
Source Server Type : MySQL
Source Server Version : 50527
Source Host : 127.0.0.1:3306
Source Schema : aini
Target Server Type : MySQL
Target Server Version : 50527
File Encoding : 65001
Date: 08/02/2021 12:48:08
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for teacher
-- ----------------------------
DROP TABLE IF EXISTS `teacher`;
CREATE TABLE `teacher` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`pwd` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 6 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of teacher
-- ----------------------------
INSERT INTO `teacher` VALUES (1, '武则天', '17772');
INSERT INTO `teacher` VALUES (5, '袁天罡', '12312');
SET FOREIGN_KEY_CHECKS = 1;
1.3导入相关依赖
<dependencies>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.48</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.3</version>
</dependency>
<!--spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<!--aspectj-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.4</version>
</dependency>
<!--Spring操作数据库的话，还需要一个spring-jdbc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<!--spring-mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.4</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
<!--静态资源过滤问题-->
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
1.4创建配置文件
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">
<!--核心配置文件-->
<configuration>
<!--配置日志-->
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!--别名-->
<typeAliases>
<package name="cn.guxiang.pojo"/>
</typeAliases>
<!--注册映射器-->
<mappers>
<package name="cn.guxiang.mapper"/>
</mappers>
</configuration>
springconfig.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">
<!--注册bean-->
<!--DataSource：使用Spring的数据源替换Mybatis的配置 c3p0 dbcp druid-->
<!--使用Spring提供的JDBC：org.springframework.jdbc.datasource.DriverManagerDataSource-->
<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/aini?useSSL=true&useUnicode=true&characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="1234"/>
</bean>
<!--SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<!--<property name="mapperLocations" value="classpath:com/tian/mapper/UserMapper.xml"/>-->
</bean>
<!--SqlSessionTemplate=我们使用的SqlSession-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<!--只能使用构造器注入，因为该类没有set方法-->
<constructor-arg index="0" ref="sqlSessionFactory"/>
</bean>
<bean id="teacherMapper" class="cn.guxiang.mapper.TeacherMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
application.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="springconfig.xml"/>
<bean id="teacherMapper" class="cn.guxiang.mapper.TeacherMapperImpl">
<property name="sqlSession" ref="sqlSession"/>
</bean>
</beans>
1.5创建类
创建实pojo包与mapper包
pojo包中创建教师类
package cn.guxiang.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Teacher {
private Integer id;
private String name;
private String pwd;
}
mapper包中创建接口，接口实现类，xml
接口:TeacherMapper
package cn.guxiang.mapper;
import cn.guxiang.pojo.Teacher;
import java.util.List;
//查询方法
public interface TeacherMapper {
List<Teacher> findAll();
}
xml:TeacherMapper.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="cn.guxiang.mapper.TeacherMapper">
<select id="findAll" resultType="Teacher">
select * from teacher
</select>
</mapper>
接口实现类:TeacherMapperImpl
package cn.guxiang.mapper;
import cn.guxiang.pojo.Teacher;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class TeacherMapperImpl implements TeacherMapper{
private SqlSessionTemplate sqlSession;
@Override
public List<Teacher> findAll() {
TeacherMapper mapper = sqlSession.getMapper(TeacherMapper.class);
return mapper.findAll();
}
}
1.6测试
import cn.guxiang.mapper.TeacherMapper;
import cn.guxiang.pojo.Teacher;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;
public class Demo01 {
@Test
public void demo01(){
ApplicationContext context=new ClassPathXmlApplicationContext("application.xml");
TeacherMapper teacherMapper = context.getBean("teacherMapper", TeacherMapper.class);
List<Teacher> teachers = teacherMapper.findAll();
for (Teacher teacher : teachers) {
System.out.println(teacher);
}
}
}
2方式一：【SqlSessionTemplate】
2.1方法介绍
SqlSessionDaoSupport 是一个抽象的支持类，用来为你提供 SqlSession。调用 getSqlSession() 方法你会得到一个 SqlSessionTemplate，之后可以用于执行 SQL 方法，就像下面这样:
public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {
public User getUser(String userId) {
return getSqlSession().selectOne("org.mybatis.spring.sample.mapper.UserMapper.getUser", userId);
}
}
在这个类里面，通常更倾向于使用 MapperFactoryBean，因为它不需要额外的代码。但是，如果你需要在 DAO 中做其它非 MyBatis 的工作或需要一个非抽象的实现类，那么这个类就很有用了。
SqlSessionDaoSupport 需要通过属性设置一个 sqlSessionFactory 或 SqlSessionTemplate。如果两个属性都被设置了，那么 SqlSessionFactory 将被忽略。
假设类 UserMapperImpl 是 SqlSessionDaoSupport 的子类，可以编写如下的 Spring 配置来执行设置：
<bean id="userDao" class="org.mybatis.spring.sample.dao.UserDaoImpl">
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
2.2创建项目
利用maven搭建普通普通项目
2.3创建数据库
/*
Navicat Premium Data Transfer
Source Server : test
Source Server Type : MySQL
Source Server Version : 50527
Source Host : 127.0.0.1:3306
Source Schema : aini
Target Server Type : MySQL
Target Server Version : 50527
File Encoding : 65001
Date: 08/02/2021 12:48:08
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for teacher
-- ----------------------------
DROP TABLE IF EXISTS `teacher`;
CREATE TABLE `teacher` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
`pwd` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 6 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of teacher
-- ----------------------------
INSERT INTO `teacher` VALUES (1, '武则天', '17772');
INSERT INTO `teacher` VALUES (5, '袁天罡', '12312');
SET FOREIGN_KEY_CHECKS = 1;
2.4导入相关依赖
<dependencies>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.48</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.3</version>
</dependency>
<!--spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<!--aspectj-->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.4</version>
</dependency>
<!--Spring操作数据库的话，还需要一个spring-jdbc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<!--spring-mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.4</version>
</dependency>
<!--lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
<!--静态资源过滤问题-->
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
</build>
2.5创建配置文件
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">
<!--核心配置文件-->
<configuration>
<!--配置日志-->
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!--别名-->
<typeAliases>
<package name="cn.guxiang.pojo"/>
</typeAliases>
<!--注册映射器-->
<mappers>
<package name="cn.guxiang.mapper"/>
</mappers>
</configuration>
springconfig.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">
<!--注册bean-->
<!--DataSource：使用Spring的数据源替换Mybatis的配置 c3p0 dbcp druid-->
<!--使用Spring提供的JDBC：org.springframework.jdbc.datasource.DriverManagerDataSource-->
<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/aini?useSSL=true&useUnicode=true&characterEncoding=UTF-8"/>
<property name="username" value="root"/>
<property name="password" value="1234"/>
</bean>
<!--SqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
<!--<property name="mapperLocations" value="classpath:com/tian/mapper/UserMapper.xml"/>-->
</bean>
<!--SqlSessionTemplate=我们使用的SqlSession-->
<!-- <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">-->
<!-- <!–只能使用构造器注入，因为该类没有set方法–>-->
<!-- <constructor-arg index="0" ref="sqlSessionFactory"/>-->
<!-- </bean>-->
<!-- <bean id="teacherMapper" class="cn.guxiang.mapper.TeacherMapperImpl">-->
<!-- <property name="sqlSession" ref="sqlSession"/>-->
<!-- </bean>-->
<!--方式二：SqlSessionDaoSupport-->
<bean id="teacherMapper2" class="cn.guxiang.mapper.TeacherMapperImpl2">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
application.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="springconfig.xml"/>
<!--方式一：-->
<!-- <bean id="teacherMapper" class="cn.guxiang.mapper.TeacherMapperImpl">-->
<!-- <property name="sqlSession" ref="sqlSession"/>-->
<!-- </bean>-->
<!--方式二：SqlSessionDaoSupport-->
<bean id="teacherMapper2" class="cn.guxiang.mapper.TeacherMapperImpl2">
<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>
</beans>
1.5创建类
创建实pojo包与mapper包
pojo包中创建教师类
package cn.guxiang.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Teacher {
private Integer id;
private String name;
private String pwd;
}
mapper包中创建接口，接口实现类，xml
接口:TeacherMapper
package cn.guxiang.mapper;
import cn.guxiang.pojo.Teacher;
import java.util.List;
//查询方法
public interface TeacherMapper {
List<Teacher> findAll();
}
xml:TeacherMapper.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="cn.guxiang.mapper.TeacherMapper">
<select id="findAll" resultType="Teacher">
select * from teacher
</select>
</mapper>
接口实现类:TeacherMapperImpl2
package cn.guxiang.mapper;
import cn.guxiang.pojo.Teacher;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import java.util.List;
public class TeacherMapperImpl2 extends SqlSessionDaoSupport implements TeacherMapper{
@Override
public List<Teacher> findAll() {
return getSqlSession().getMapper(TeacherMapper.class).findAll();
}
}
1.6测试
import cn.guxiang.mapper.TeacherMapper;
import cn.guxiang.pojo.Teacher;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;
public class Demo01 {
//方式一测试
@Test
public void demo01(){
ApplicationContext context=new ClassPathXmlApplicationContext("application.xml");
TeacherMapper teacherMapper = context.getBean("teacherMapper", TeacherMapper.class);
List<Teacher> teachers = teacherMapper.findAll();
for (Teacher teacher : teachers) {
System.out.println(teacher);
}
}
//方式二测试
@Test //Spring整合Mybatis后
public void demo02(){
ApplicationContext context=new ClassPathXmlApplicationContext("application.xml");
TeacherMapper teacherMapper2 = context.getBean("teacherMapper2", TeacherMapper.class);
List<Teacher> teachers = teacherMapper2.findAll();
for (Teacher teacher : teachers) {
System.out.println(teacher);
}
}
}