MyBatis简介与配置MyBatis+Spring+MySql[转]

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MyBatis简介与配置MyBatis+Spring+MySql[转]
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。
/* 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)

);



/*插入学生数据*/

INSERT INTO STUDENT_TBL (STUDENT_ID,

                         STUDENT_NAME,

                         STUDENT_SEX,

                         STUDENT_BIRTHDAY,

                         CLASS_ID)

  VALUES   (123456,

            '某某某',

            '女',

            '1980-08-01',

            121546

            )
```
/* 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)
);

/*插入学生数据*/
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。
jdbc.driverClassName=com.mysql.jdbc.Driver

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

    }

}
```
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。
public interface StudentMapper {



    public StudentEntity getStudent(String studentID);



    public StudentEntity getStudentAndClass(String studentID);



    public List<StudentEntity> getStudentAll();



    public void insertStudent(StudentEntity entity);



    public void deleteStudent(StudentEntity entity);



    public void updateStudent(StudentEntity entity);

}
```
public interface StudentMapper {
	
	public StudentEntity getStudent(String studentID);
	
	public StudentEntity getStudentAndClass(String studentID);
	
	public List<StudentEntity> 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
resultMap标签：表字段与属性的映射。
Select标签：查询sql。
<?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.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">

        <![CDATA[

            SELECT * from STUDENT_TBL ST

                WHERE ST.STUDENT_ID = #{studentID}

        ]]>

    </select>



    

    <select id="getStudentAll"  resultType="com.manager.data.model.StudentEntity" resultMap="studentResultMap">

        <![CDATA[

            SELECT * from STUDENT_TBL

        ]]>

    </select>



</mapper>
```
<?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.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">
		<![CDATA[
			SELECT * from STUDENT_TBL ST
				WHERE ST.STUDENT_ID = #{studentID} 
		]]> 
	</select>
	
	
	<select id="getStudentAll"  resultType="com.manager.data.model.StudentEntity" resultMap="studentResultMap">
		<![CDATA[
			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。
typeAliases标签：给类起一个别名。com.manager.data.model.StudentEntity类，可以使用StudentEntity代替。
Mappers标签：加载MyBatis中实体类的SQL映射语句文件。
<?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>

    <typeAliases>

        <typeAlias alias="StudentEntity" type="com.manager.data.model.StudentEntity"/>

    </typeAliases>

    <mappers>

        <mapper resource="com/manager/data/maps/StudentMapper.xml" />

    </mappers>

</configuration>
```
<?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>
	<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。


<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>



<!— mapper bean -->

<bean id="studentMapper" class="org.mybatis.spring.MapperFactoryBean">

    <property name="mapperInterface" value="com.manager.data.StudentMapper" />

    <property name="sqlSessionFactory" ref="sqlSessionFactory" />

</bean>
```

<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>

<!— mapper 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
@Repository

@Transactional

public interface StudentMapper {

}
```
@Repository
@Transactional
public interface StudentMapper {
}
```
对应的需要在dispatcher-servlet.xml中加入扫描：
<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>
```
    <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：
@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());

    }

}
```
@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：
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<StudentEntity> studentList = studentMapper.getStudentAll();

        for( StudentEntity entityTemp : studentList){

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

        }



    }

}
```
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<StudentEntity> studentList = studentMapper.getStudentAll();
		for( StudentEntity entityTemp : studentList){
			System.out.println(entityTemp.getStudentName());
		}
		
	}
}
```
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
查看全文

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原文地址：https://www.cnblogs.com/handsome1013/p/5085638.html

MyBatis简介与配置MyBatis+Spring+MySql[转]

1.1MyBatis简介

1.2MyBatis+Spring+MySql简单配置

1.2.1搭建Spring环境

1.2.2建立MySql数据库

1.2.3搭建MyBatis环境

1.2.3.1创建实体类: StudentEntity

1.2.3.2创建数据访问接口

1.2.3.3创建SQL映射语句文件

1.2.3.4创建MyBatis的mapper配置文件

1.2.3.5修改Spring 的配置文件

1.2.4测试StudentMapper