1. 先建maven项目
2. 加入maven依赖
1)spring依赖
2）mybatis依赖
3）mysql驱动
4）spring的事务依赖
5）mybatis和spring集成的依赖：mybatis官方提供的，用来在spring项目中创建mybatis的SqlSessionFactory，dao对象的。
1 <?xml version="1.0" encoding="UTF-8"?> 2 3 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 5 <modelVersion>4.0.0</modelVersion> 6 7 <groupId>com.bjpowernode</groupId> 8 <artifactId>ch07-spring-mybatis</artifactId> 9 <version>1.0-SNAPSHOT</version> 10 11 12 <properties> 13 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 14 <maven.compiler.source>1.8</maven.compiler.source> 15 <maven.compiler.target>1.8</maven.compiler.target> 16 </properties> 17 18 <dependencies> 19 <dependency> 20 <groupId>junit</groupId> 21 <artifactId>junit</artifactId> 22 <version>4.11</version> 23 <scope>test</scope> 24 </dependency> 25 <!--spring的核心ioc--> 26 <dependency> 27 <groupId>org.springframework</groupId> 28 <artifactId>spring-context</artifactId> 29 <version>5.2.5.RELEASE</version> 30 </dependency> 31 <!--做spring事务要用到的tx，jdbc--> 32 <dependency> 33 <groupId>org.springframework</groupId> 34 <artifactId>spring-tx</artifactId> 35 <version>5.2.5.RELEASE</version> 36 </dependency> 37 <dependency> 38 <groupId>org.springframework</groupId> 39 <artifactId>spring-jdbc</artifactId> 40 <version>5.2.5.RELEASE</version> 41 </dependency> 42 <!--mybatis依赖--> 43 <dependency> 44 <groupId>org.mybatis</groupId> 45 <artifactId>mybatis</artifactId> 46 <version>3.5.1</version> 47 </dependency> 48 <!--mybatis，spring集成的依赖--> 49 <dependency> 50 <groupId>org.mybatis</groupId> 51 <artifactId>mybatis-spring</artifactId> 52 <version>1.3.1</version> 53 </dependency> 54 <!--mysql驱动--> 55 <dependency> 56 <groupId>mysql</groupId> 57 <artifactId>mysql-connector-java</artifactId> 58 <version>5.1.9</version> 59 </dependency> 60 <!--阿里公司的数据连接池--> 61 <dependency> 62 <groupId>com.alibaba</groupId> 63 <artifactId>druid</artifactId> 64 <version>1.1.12</version> 65 </dependency> 66 </dependencies> 67 68 <build> 69 <!--目的是把src/main/java目录中的xml文件包含到输出结果中--> 70 <resources> 71 <resource> 72 <directory>src/main/java</directory><!--所在的目录--> 73 <includes><!--包括目录下的.properties,.xml 文件都会扫描到--> 74 <include>**/*.properties</include> 75 <include>**/*.xml</include> 76 </includes> 77 <filtering>false</filtering> 78 </resource> 79 </resources> 80 81 <plugins> 82 <plugin> 83 <artifactId>maven-compiler-plugin</artifactId> 84 <version>3.1</version> 85 <configuration> 86 <source>1.8</source> 87 <target>1.8</target> 88 </configuration> 89 </plugin> 90 </plugins> 91 </build> 92 </project>
3. 创建实体类
1 package com.bjpowernode.domain; 2 3 public class Student { 4 private Integer id; 5 private String name; 6 private String email; 7 private Integer age; 8 9 public Student() { 10 } 11 12 public Student(Integer id, String name, String email, Integer age) { 13 this.id = id; 14 this.name = name; 15 this.email = email; 16 this.age = age; 17 } 18 19 public Integer getId() { 20 return id; 21 } 22 23 public void setId(Integer id) { 24 this.id = id; 25 } 26 27 public String getName() { 28 return name; 29 } 30 31 public void setName(String name) { 32 this.name = name; 33 } 34 35 public String getEmail() { 36 return email; 37 } 38 39 public void setEmail(String email) { 40 this.email = email; 41 } 42 43 public Integer getAge() { 44 return age; 45 } 46 47 public void setAge(Integer age) { 48 this.age = age; 49 } 50 51 @Override 52 public String toString() { 53 return "student{" + 54 "id=" + id + 55 ", name='" + name + '\'' + 56 ", email='" + email + '\'' + 57 ", age=" + age + 58 '}'; 59 } 60 }
4.创建dao接口和mapper文件
1 package com.bjpowernode.dao; 2 3 import com.bjpowernode.domain.Student; 4 5 import java.util.List; 6 7 public interface StudentDao { 8 List<Student> selectStudents(); 9 int insertStudent(Student student); 10 }
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper 3 PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 4 "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> 5 <mapper namespace="com.bjpowernode.dao.StudentDao"> 6 <select id="selectStudents" resultType="com.bjpowernode.domain.Student"> 7 select id,name,email,age from student order by id desc 8 </select> 9 10 <insert id="insertStudent"> 11 insert into student values(#{id},#{name},#{email},#{age}) 12 </insert> 13 </mapper>
5. 创建mybatis主配置文件
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE configuration 3 PUBLIC "-//mybatis.org//DTD Config 3.0//EN" 4 "http://mybatis.org/dtd/mybatis-3-config.dtd"> 5 <!--mybatis-3-config.dtd约束文件信息--> 6 <configuration> 7 <!--settings:控制mybatis的全局行为--> 8 <settings> 9 <!--设置mybatis输出日志到控制台--> 10 <setting name="logImpl" value="STDOUT_LOGGING"/> 11 </settings> 12 <!-- <typeAliases> 13 <typeAlias type="com.bjpowernode.domain.Student"/> 14 </typeAliases>--> 15 <!--sql映射文件的位置（sql mapper 的位置）--> 16 <!--一个mapper标签指定一个文件的位置，从类路径开始的路径信息 17 类路径：编译后target/classes下面的路径 18 --> 19 <mappers> 20 <mapper resource="com/bjpowernode/dao/StudentDao.xml"/> 21 </mappers> 22 </configuration>
6.创建Service接口和实现类，属性是dao
1 package com.bjpowernode.service; 2 3 import com.bjpowernode.domain.Student; 4 5 import java.util.List; 6 7 public interface MyService { 8 List<Student> selectStudents(); 9 int insertStudent(Student student); 10 }
1 package com.bjpowernode.service; 2 3 import com.bjpowernode.dao.StudentDao; 4 import com.bjpowernode.domain.Student; 5 6 import java.util.List; 7 8 public class MyServiceImpl implements MyService { 9 private StudentDao studentDao = null; 10 11 public void setStudentDao(StudentDao studentDao) { 12 this.studentDao = studentDao; 13 } 14 15 @Override 16 public List<Student> selectStudents() { 17 List<Student> students = studentDao.selectStudents(); 18 return students; 19 } 20 21 @Override 22 public int insertStudent(Student student) { 23 int num = studentDao.insertStudent(student); 24 return num; 25 } 26 }
7. 创建spring的配置文件：声明mybatis的对象交给spring创建
jdbc.username = root jdbc.url = jdbc:mysql://localhost:3306/springdb jdbc.password = 123456 jdbc.maxcon = 20
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:context="http://www.springframework.org/schema/context" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> 6 <!--使用属性配置文件来编译修改数据库的配置内容--> 7 <context:property-placeholder location="classpath:jdbc.properties"/> 8 <!--声明数据源，链接数据库--> 9 <bean id="myDataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> 10 <!--使用属性配置文件的数据，语法${key}--> 11 <property name="url" value="${jdbc.url}"/> 12 <property name="username" value="${jdbc.username}"/> 13 <property name="password" value="${jdbc.password}"/> 14 <property name="maxActive" value="${jdbc.maxcon}"/> 15 </bean> 16 <!--声明的是mybatis提供的SqlSessionFactoryBean实现类--> 17 <!--把原来SqlSessionFactory需要的数据库链接信息，mapper文件存放位置赋值--> 18 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 19 <property name="dataSource" ref="myDataSource"/> 20 <property name="configLocation" value="classpath:mybatis_conf.xml"/> 21 </bean> 22 <!--声明dao对象--> 23 <!--使用SqlSession的getMapper（StudentDao.class） 24 MapperScannerConfigurer:在内部调用getMapper（）生成每个dao接口的代理对象 25 --> 26 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 27 <!--指定SqlSessionFactory对象的id--> 28 <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> 29 <!-- 30 指定包名，包名是dao接口所在的包名，MapperScannerConfigurer会扫描这个包中的所有 31 接口，把每个接口都执行一次getMapper（）方法，得到每个接口的dao对象 32 创建好的dao对象放到spring容器中,dao对象的默认名称是接口名首字母小写 33 --> 34 <property name="basePackage" value="com.bjpowernode.dao"/> 35 </bean> 36 <!--声明service对象--> 37 <bean id="myService" class="com.bjpowernode.service.MyServiceImpl"> 38 <property name="studentDao" ref="studentDao"/> 39 </bean> 40 </beans>
8. 创建测试类，获取Service对象，通过Service调用，完成数据库的访问
1 package com.bjpowernode; 2 3 import com.bjpowernode.dao.StudentDao; 4 import com.bjpowernode.domain.Student; 5 import com.bjpowernode.service.MyService; 6 import com.bjpowernode.utils.MybatisUtils; 7 import org.apache.ibatis.session.SqlSession; 8 import org.junit.Test; 9 import org.springframework.context.ApplicationContext; 10 import org.springframework.context.support.ClassPathXmlApplicationContext; 11 12 import java.util.List; 13 14 public class MyTest01 { 15 @Test 16 public void test01(){ 17 String conf = "applicationContext.xml"; 18 ApplicationContext ac = new ClassPathXmlApplicationContext(conf); 19 /* String [] lists = ac.getBeanDefinitionNames(); 20 for(String s:lists){ 21 System.out.println(s); 22 } 23 24 StudentDao dao = (StudentDao) ac.getBean("studentDao"); 25 List<Student> list = dao.selectStudents(); 26 for (Student s:list){ 27 System.out.println(s); 28 }*/ 29 MyService myService = (MyService) ac.getBean("myService"); 30 Student student = new Student(1009,"wangxx","dd@qq.com",87); 31 /** 32 * spring和mybatis集合，事务自动提交 33 */ 34 int num = myService.insertStudent(student); 35 System.out.println(num); 36 } 37 38 @Test 39 public void testSelectAll(){ 40 String config = "applicationContext.xml"; 41 ApplicationContext ac = new ClassPathXmlApplicationContext(config); 42 MyService myService = (MyService) ac.getBean("myService"); 43 List<Student> students = myService.selectStudents(); 44 for(Student stu:students){ 45 System.out.println(stu); 46 } 47 } 48 }