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Apach
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测试数据/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测试数据/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
/* 建立数据库 */ CREATE DATABASE STUDENT_MANAGER; USE STUDENT_MANAGER; /***** 建立student表 *****/ CREATE TABLE STUDENT_TBL ( STUDENT_ID VARCHAR (255) PRIMARY KEY , STUDENT_NAME VARCHAR (10) NOT NULL , STUDENT_SEX VARCHAR (10), STUDENT_BIRTHDAY DATE , CLASS_ID VARCHAR (255) ); /*插入**/ INSERT INTO STUDENT_TBL (STUDENT_ID, STUDENT_NAME, STUDENT_SEX, STUDENT_BIRTHDAY, CLASS_ID) VALUES (123456, '某某某' , '女' , '1980-08-01' , 121546 )
创建连接MySql使用的配置文件mysql.properties。
Mysql.properties代码
jdbc.driverClassName=com.mysql.jdbc.Driver 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
public class StudentEntity implements Serializable { private static final long serialVersionUID = 3096154202413606831L; private ClassEntity classEntity; private Date studentBirthday; private String studentID; private String studentName; private String studentSex; public ClassEntity getClassEntity() { return classEntity; } public Date getStudentBirthday() { return studentBirthday; } public String getStudentID() { return studentID; } public String getStudentName() { return studentName; } public String getStudentSex() { return studentSex; } public void setClassEntity(ClassEntity classEntity) { this .classEntity = classEntity; } public void setStudentBirthday(Date studentBirthday) { this .studentBirthday = studentBirthday; } public void setStudentID(String studentID) { this .studentID = studentID; } public void setStudentName(String studentName) { this .studentName = studentName; } public void setStudentSex(String studentSex) { this .studentSex = studentSex; } }
1.2.3.2创建数据访问接口
Student类对应的dao接口：StudentMapper。
Java代码
public interface StudentMapper { public StudentEntity getStudent(String studentID); public StudentEntity getStudentAndClass(String studentID); public List getStudentAll(); public void insertStudent(StudentEntity entity); public void deleteStudent(StudentEntity entity); public void updateStudent(StudentEntity entity); }
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
xml version = "1.0" encoding = "UTF-8" ?> > mapper namespace = "com.manager.data.StudentMapper" > resultMap type = "StudentEntity" id = "studentResultMap" > id property = "studentID" column = "STUDENT_ID" /> result property = "studentName" column = "STUDENT_NAME" /> result property = "studentSex" column = "STUDENT_SEX" /> result property = "studentBirthday" column = "STUDENT_BIRTHDAY" /> resultMap > select id = "getStudent" parameterType = "String" resultType = "StudentEntity" resultMap = "studentResultMap" > SELECT * from STUDENT_TBL ST WHERE ST.STUDENT_ID = #{studentID} ]]> select > select id = "getStudentAll" resultType = "com.manager.data.model.StudentEntity" resultMap = "studentResultMap" > SELECT * from STUDENT_TBL ]]> select > 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
xml version = "1.0" encoding = "UTF-8" ?> > configuration > typeAliases > typeAlias alias = "StudentEntity" type = "com.manager.data.model.StudentEntity" /> typeAliases > mappers > mapper resource = "com/manager/data/maps/StudentMapper.xml" /> mappers > 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
context:property-placeholder location = "classpath:mysql.properties" /> bean id = "dataSource" class = "org.springframework.jdbc.datasource.DriverManagerDataSource" > property name = "driverClassName" value = "${jdbc.driverClassName}" /> property name = "url" value = "${jdbc.url}" /> bean > bean id = "transactionManager" class = "org.springframework.jdbc.datasource.DataSourceTransactionManager" > property name = "dataSource" ref = "dataSource" /> bean > bean id = "sqlSessionFactory" class = "org.mybatis.spring.SqlSessionFactoryBean" > property name = "configLocation" value = "classpath:mybatis-config.xml" /> property name = "dataSource" ref = "dataSource" /> bean > > bean id = "studentMapper" class = "org.mybatis.spring.MapperFactoryBean" > property name = "mapperInterface" value = "com.manager.data.StudentMapper" /> property name = "sqlSessionFactory" ref = "sqlSessionFactory" /> bean >
也可以不定义mapper的bean，使用注解：
将StudentMapper加入注解
Java代码
@Repository @Transactional public interface StudentMapper { }
对应的需要在dispatcher-servlet.xml中加入扫描：
Xml代码
bean class = "org.mybatis.spring.mapper.MapperScannerConfigurer" > property name = "annotationClass" value = "org.springframework.stereotype.Repository" /> property name = "basePackage" value = "com.liming.manager" /> property name = "sqlSessionFactory" ref = "sqlSessionFactory" /> 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
@Controller public class TestController { @Autowired private StudentMapper studentMapper; @RequestMapping (value = "index.do" ) public void indexPage() { StudentEntity entity = studentMapper.getStudent( "10000013" ); System.out.println( "name：" + entity.getStudentName()); } }
使用Junit测试：
Java代码
使用Junit测试： Java代码 @RunWith (value = SpringJUnit4ClassRunner. class ) @ContextConfiguration (value = "test-servlet.xml" ) public class StudentMapperTest { @Autowired private ClassMapper classMapper; @Autowired private StudentMapper studentMapper; @Transactional public void getStudentTest(){ StudentEntity entity = studentMapper.getStudent( "10000013" ); System.out.println( "" + entity.getStudentID() + entity.getStudentName()); List studentList = studentMapper.getStudentAll(); for ( StudentEntity entityTemp : studentList){ System.out.println(entityTemp.getStudentName()); } } }查看更多关于MyBatis学习之一、MyBatis简介与配置MyBatis+Spring+MySql的详细内容...