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HomeDatabaseMysql Tutorial一、MyBatis简介与配置MyBatis+Spring+MySql

MyBatis学习 之 一、MyBatis简介与配置MyBatis+Spring+MySql MyBatis学习 之 二、SQL语句映射文件(1)resultMap MyBatis学习 之 二、SQL语句映射文件(2)增删改查、参数、缓存 MyBatis学习 之 三、动态SQL语句 MyBatis学习 之 四、MyBatis配置文件 1.1MyBatis

MyBatis学习 之 一、MyBatis简介与配置MyBatis+Spring+MySql

MyBatis学习 之 二、SQL语句映射文件(1)resultMap

MyBatis学习 之 二、SQL语句映射文件(2)增删改查、参数、缓存

MyBatis学习 之 三、动态SQL语句

MyBatis学习 之 四、MyBatis配置文件


1.1MyBatis简介

     MyBatis 是一个可以自定义SQL、存储过程和高级映射的持久层框架。MyBatis 摒除了大部分的JDBC代码、手工设置参数和结果集重获。MyBatis 只使用简单的XML 和注解来配置和映射基本数据类型、Map 接口和POJO 到数据库记录。相对Hibernate和Apache OJB等“一站式”ORM解决方案而言,Mybatis 是一种“半自动化”的ORM实现。
需要使用的Jar包:mybatis-3.0.2.jar(mybatis核心包)。mybatis-spring-1.0.0.jar(与Spring结合包)。

下载地址:
http://ibatis.apache.org/tools/ibator
http://code.google.com/p/mybatis/


1.2MyBatis+Spring+MySql简单配置

1.2.1搭建Spring环境

1,建立maven的web项目;
2,加入Spring框架、配置文件;
3,在pom.xml中加入所需要的jar包(spring框架的、mybatis、mybatis-spring、junit等);
4,更改web.xml和spring的配置文件;
5,添加一个jsp页面和对应的Controller;
6,测试。

可参照:http://limingnihao.iteye.com/blog/830409。使用Eclipse的Maven构建SpringMVC项目


1.2.2建立MySql数据库

建立一个学生选课管理数据库。
表:学生表、班级表、教师表、课程表、学生选课表。
逻辑关系:每个学生有一个班级;每个班级对应一个班主任教师;每个教师只能当一个班的班主任;

使用下面的sql进行建数据库,先建立学生表,插入数据(2条以上)。

更多sql请下载项目源文件,在resource/sql中。

Sql代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. /* 建立数据库 */  

  2. CREATEDATABASE STUDENT_MANAGER;  

  3. USE STUDENT_MANAGER;  

  4. /***** 建立student表 *****/  

  5. CREATETABLE STUDENT_TBL  

  6. (  

  7.   STUDENT_ID         VARCHAR(255) PRIMARYKEY,  

  8.   STUDENT_NAME       VARCHAR(10) NOTNULL,  

  9.   STUDENT_SEX        VARCHAR(10),  

  10.   STUDENT_BIRTHDAY   DATE,  

  11.   CLASS_ID           VARCHAR(255)  

  12. );  

  13. /*插入**/  

  14. INSERTINTO STUDENT_TBL (STUDENT_ID,  

  15.                         STUDENT_NAME,  

  16.                         STUDENT_SEX,  

  17.                         STUDENT_BIRTHDAY,  

  18.                         CLASS_ID)  

  19. VALUES   (123456,  

  20. '某某某',  

  21. '女',  

  22. '1980-08-01',  

  23.            121546  

  24.            )  



创建连接MySql使用的配置文件mysql.properties。

Mysql.properties代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. jdbc.driverClassName=com.mysql.jdbc.Driver  

  2. jdbc.url=jdbc:mysql://localhost:3306/student_manager?user=root&password=limingnihao&useUnicode=true&characterEncoding=UTF-8



1.2.3搭建MyBatis环境

顺序随便,现在的顺序是因为可以尽量的少的修改写好的文件。


1.2.3.1创建实体类: StudentEntity

Java代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. publicclass StudentEntity implements Serializable {  

  2. privatestaticfinallong serialVersionUID = 3096154202413606831L;  

  3. private ClassEntity classEntity;  

  4. private Date studentBirthday;  

  5. private String studentID;  

  6. private String studentName;  

  7. private String studentSex;  

  8. public ClassEntity getClassEntity() {  

  9. return classEntity;  

  10.    }  

  11. public Date getStudentBirthday() {  

  12. return studentBirthday;  

  13.    }  

  14. public String getStudentID() {  

  15. return studentID;  

  16.    }  

  17. public String getStudentName() {  

  18. return studentName;  

  19.    }  

  20. public String getStudentSex() {  

  21. return studentSex;  

  22.    }  

  23. publicvoid setClassEntity(ClassEntity classEntity) {  

  24. this.classEntity = classEntity;  

  25.    }  

  26. publicvoid setStudentBirthday(Date studentBirthday) {  

  27. this.studentBirthday = studentBirthday;  

  28.    }  

  29. publicvoid setStudentID(String studentID) {  

  30. this.studentID = studentID;  

  31.    }  

  32. publicvoid setStudentName(String studentName) {  

  33. this.studentName = studentName;  

  34.    }  

  35. publicvoid setStudentSex(String studentSex) {  

  36. this.studentSex = studentSex;  

  37.    }  

  38. }  




1.2.3.2创建数据访问接口

Student类对应的dao接口:StudentMapper。

Java代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. publicinterface StudentMapper {  

  2. public StudentEntity getStudent(String studentID);  

  3. public StudentEntity getStudentAndClass(String studentID);  

  4. public List getStudentAll();  

  5. publicvoid insertStudent(StudentEntity entity);  

  6. publicvoid deleteStudent(StudentEntity entity);  

  7. publicvoid updateStudent(StudentEntity entity);  

  8. }  



1.2.3.3创建SQL映射语句文件


Student类的sql语句文件StudentMapper.xml

Xml代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. xmlversion="1.0"encoding="UTF-8"?>

  2. span>>

  3. mappernamespace="com.manager.data.StudentMapper">

  4. resultMaptype="StudentEntity"id="studentResultMap">

  5. idproperty="studentID"column="STUDENT_ID"/>

  6. resultproperty="studentName"column="STUDENT_NAME"/>

  7. resultproperty="studentSex"column="STUDENT_SEX"/>

  8. resultproperty="studentBirthday"column="STUDENT_BIRTHDAY"/>

  9. resultMap>

  10. selectid="getStudent"parameterType="String"resultType="StudentEntity"resultMap="studentResultMap">

  11.            SELECT * from STUDENT_TBL ST

  12.                WHERE ST.STUDENT_ID = #{studentID}

  13.        ]]>

  14. select>

  15. selectid="getStudentAll"resultType="com.manager.data.model.StudentEntity"resultMap="studentResultMap">

  16.            SELECT * from STUDENT_TBL

  17.        ]]>

  18. select>

  19. mapper>




1.2.3.4创建MyBatis的mapper配置文件

在src/main/resource中创建MyBatis配置文件:mybatis-config.xml。


Xml代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. xmlversion="1.0"encoding="UTF-8"?>

  2. span>>

  3. configuration>

  4. typeAliases>

  5. typeAliasalias="StudentEntity"type="com.manager.data.model.StudentEntity"/>

  6. typeAliases>

  7. mappers>

  8. mapperresource="com/manager/data/maps/StudentMapper.xml"/>

  9. mappers>

  10. configuration>





1.2.3.5修改Spring 的配置文件

主要是添加SqlSession的制作工厂类的bean:SqlSessionFactoryBean,(在mybatis.spring包中)。需要指定配置文件位置和dataSource。
和数据访问接口对应的实现bean。通过MapperFactoryBean创建出来。需要执行接口类全称和SqlSession工厂bean的引用。

Xml代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. context:property-placeholderlocation="classpath:mysql.properties"/>

  2. beanid="dataSource"class="org.springframework.jdbc.datasource.DriverManagerDataSource">

  3. propertyname="driverClassName"value="${jdbc.driverClassName}"/>

  4. propertyname="url"value="${jdbc.url}"/>

  5. bean>

  6. beanid="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

  7. propertyname="dataSource"ref="dataSource"/>

  8. bean>

  9. beanid="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean">

  10. propertyname="configLocation"value="classpath:mybatis-config.xml"/>

  11. propertyname="dataSource"ref="dataSource"/>

  12. bean>

  13. >

  14. beanid="studentMapper"class="org.mybatis.spring.MapperFactoryBean">

  15. propertyname="mapperInterface"value="com.manager.data.StudentMapper"/>

  16. propertyname="sqlSessionFactory"ref="sqlSessionFactory"/>

  17. bean>



也可以不定义mapper的bean,使用注解:

将StudentMapper加入注解


Java代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. @Repository

  2. @Transactional

  3. publicinterface StudentMapper {  

  4. }  


对应的需要在dispatcher-servlet.xml中加入扫描:


Xml代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. beanclass="org.mybatis.spring.mapper.MapperScannerConfigurer">

  2. propertyname="annotationClass"value="org.springframework.stereotype.Repository"/>

  3. propertyname="basePackage"value="com.liming.manager"/>

  4. propertyname="sqlSessionFactory"ref="sqlSessionFactory"/>

  5. bean>



1.2.4测试StudentMapper

使用SpringMVC测试,创建一个TestController,配置tomcat,访问index.do页面进行测试:

Java代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. @Controller

  2. publicclass TestController {  

  3. @Autowired

  4. private StudentMapper studentMapper;  

  5. @RequestMapping(value = "index.do")  

  6. publicvoid indexPage() {    

  7.        StudentEntity entity = studentMapper.getStudent("10000013");  

  8.        System.out.println("name:" + entity.getStudentName());  

  9.    }    

  10. }  



使用Junit测试:

Java代码 一、MyBatis简介与配置MyBatis+Spring+MySql

  1. 使用Junit测试:  

  2. Java代码  

  3. @RunWith(value = SpringJUnit4ClassRunner.class)  

  4. @ContextConfiguration(value = "test-servlet.xml")  

  5. publicclass StudentMapperTest {  

  6. @Autowired

  7. private ClassMapper classMapper;  

  8. @Autowired

  9. private StudentMapper studentMapper;  

  10. @Transactional

  11. publicvoid getStudentTest(){  

  12.        StudentEntity entity = studentMapper.getStudent("10000013");  

  13.        System.out.println("" + entity.getStudentID() + entity.getStudentName());  

  14.        List studentList = studentMapper.getStudentAll();  

  15. for( StudentEntity entityTemp : studentList){  

  16.            System.out.println(entityTemp.getStudentName());  

  17.        }  

  18.    }  

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