MyBatis學習之一、MyBatis簡介與配置MyBatis+Spring+MySql

1.1MyBatis簡介

MyBatis 是一個可以自定義SQL、存儲過程和高級映射的持久層框架。MyBatis 摒除了大部分的JDBC代碼、手工設置參數和結果集重獲。MyBatis 只使用簡單的XML 和註解來配置和映射基本數據類型、Map 接口和POJO 到數據庫記錄。相對Hibernate和Apache OJB等“一站式”ORM解決方案而言，Mybatis 是一種“半自動化”的ORM實現。
需要使用的Jar包：mybatis-3.0.2.jar（mybatis核心包）。mybatis-spring-1.0.0.jar(與Spring結合包)。

下載地址：
http://ibatis.apache.org/tools/ibator
http://code.google.com/p/mybatis/

1.2MyBatis+Spring+MySql簡單配置

1.2.1搭建Spring環境

1,建立maven的web項目；
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,添加一個jsp頁面和對應的Controller；
6,測試。

可參照：http://limingnihao.iteye.com/blog/830409。使用Eclipse的Maven構建SpringMVC項目

1.2.2建立MySql數據庫

建立一個學生選課管理數據庫。
表：學生表、班級表、教師表、課程表、學生選課表。
邏輯關係：每個學生有一個班級；每個班級對應一個班主任教師；每個教師只能當一個班的班主任；

使用下面的sql進行建數據庫，先建立學生表，插入數據（2條以上）。

更多sql請下載項目源文件，在resource/sql中。

Sql代碼

/* 建立數據庫 */
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)
);
/*插入學生數據*/
INSERT INTO STUDENT_TBL (STUDENT_ID,
STUDENT_NAME,
STUDENT_SEX,
STUDENT_BIRTHDAY,
CLASS_ID)
VALUES (123456,
'某某某',
'女',
'1980-08-01',
121546
)

/* 建立數據庫 */
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)
);

/*插入學生數據*/
INSERT INTO STUDENT_TBL (STUDENT_ID,
                         STUDENT_NAME,
                         STUDENT_SEX,
                         STUDENT_BIRTHDAY,
                         CLASS_ID)
  VALUES   (123456,
            '某某某',
            '女',
            '1980-08-01',
            121546
            )

創建連接MySql使用的配置文件mysql.properties。

Mysql.properties代碼

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環境

順序隨便，現在的順序是因爲可以儘量的少的修改寫好的文件。

1.2.3.1創建實體類: StudentEntity

Java代碼

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創建數據訪問接口

Student類對應的dao接口：StudentMapper。

Java代碼

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創建SQL映射語句文件

Student類的sql語句文件StudentMapper.xml
resultMap標籤：表字段與屬性的映射。
Select標籤：查詢sql。

Xml代碼

<?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>
	
	<!-- 查詢學生，根據id -->
	<select id="getStudent" parameterType="String" resultType="StudentEntity" resultMap="studentResultMap">
		<![CDATA[
			SELECT * from STUDENT_TBL ST
				WHERE ST.STUDENT_ID = #{studentID} 
		]]> 
	</select>
	
	<!-- 查詢學生列表 -->
	<select id="getStudentAll"  resultType="com.manager.data.model.StudentEntity" resultMap="studentResultMap">
		<![CDATA[
			SELECT * from STUDENT_TBL
		]]> 
	</select>
	
</mapper>

1.2.3.4創建MyBatis的mapper配置文件

在src/main/resource中創建MyBatis配置文件：mybatis-config.xml。
typeAliases標籤：給類起一個別名。com.manager.data.model.StudentEntity類，可以使用StudentEntity代替。
Mappers標籤：加載MyBatis中實體類的SQL映射語句文件。

Xml代碼

<?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的製作工廠類的bean：SqlSessionFactoryBean，（在mybatis.spring包中）。需要指定配置文件位置和dataSource。
和數據訪問接口對應的實現bean。通過MapperFactoryBean創建出來。需要執行接口類全稱和SqlSession工廠bean的引用。

Xml代碼

<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>

<!-- 導入屬性配置文件 -->
<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>

也可以不定義mapper的bean，使用註解：

將StudentMapper加入註解

Java代碼

@Repository
@Transactional
public interface StudentMapper {
}

@Repository
@Transactional
public interface StudentMapper {
}

對應的需要在dispatcher-servlet.xml中加入掃描：

Xml代碼

<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測試StudentMapper

使用SpringMVC測試，創建一個TestController，配置tomcat，訪問index.do頁面進行測試：

Java代碼

@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測試：

Java代碼

使用Junit測試：
Java代碼
@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測試：
Java代碼
@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());
		}
		
	}
}

原文地址：http://limingnihao.iteye.com/blog/781671

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MyBatis學習之一、MyBatis簡介與配置MyBatis+Spring+MySql

1.1MyBatis簡介

1.2MyBatis+Spring+MySql簡單配置

1.2.1搭建Spring環境

1.2.2建立MySql數據庫

1.2.3搭建MyBatis環境

1.2.3.1創建實體類: StudentEntity

1.2.3.2創建數據訪問接口

1.2.3.3創建SQL映射語句文件

1.2.3.4創建MyBatis的mapper配置文件

1.2.3.5修改Spring 的配置文件

1.2.4測試StudentMapper

Sybase中存儲過程的建立與使用

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MyBatis學習 之 一、MyBatis簡介與配置MyBatis+Spring+MySql

1.1MyBatis簡介

1.2MyBatis+Spring+MySql簡單配置

1.2.1搭建Spring環境

1.2.2建立MySql數據庫

1.2.3搭建MyBatis環境

1.2.3.1創建實體類: StudentEntity

1.2.3.2創建數據訪問接口

1.2.3.3創建SQL映射語句文件

1.2.3.4創建MyBatis的mapper配置文件

1.2.3.5修改Spring 的配置文件

1.2.4測試StudentMapper

MyBatis學習之一、MyBatis簡介與配置MyBatis+Spring+MySql