這篇文章主要介紹了mybatis簡介與配置,介紹了MyBatis+Spring+MySql簡單配置,有興趣的可以了解一下
MyBatis簡介
##MyBatis 是一個可以自訂SQL、預存程序和進階映射的持久性層框架。 MyBatis 摒除了大部分的JDBC程式碼、手動設定參數和結果集重獲。 MyBatis 只使用簡單的XML 和註解來設定和對應基本資料類型、Map 介面和POJO 到資料庫記錄。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實作。 需要使用的Jar套件:mybatis-3.0.2.jar(mybatis核心套件)。 mybatis-spring-1.0.0.jar(與Spring結合包)。
MyBatis+Spring+MySql簡單設定
建置Spring環境
1,建立maven的web專案;
3,在pom.xml中加入所需的jar套件(spring框架的、mybatis、mybatis-spring、junit等等);4,更改web.xml和spring的設定檔;5,新增一個jsp頁面和對應的Controller;
6,測試。
建立MySql資料庫
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進行建資料庫,先建立學生表,插入資料(2條以上)。
更多sql請下載專案來源文件,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**/ INSERT INTO STUDENT_TBL (STUDENT_ID, STUDENT_NAME, STUDENT_SEX, STUDENT_BIRTHDAY, CLASS_ID) VALUES (123456, '某某某', '女', '1980-08-01', 121546 )
jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/student_manager?user=root&password=bjpowernode&useUnicode=true&characterEncoding=UTF-8
建立MyBatis環境
順序隨便,現在的順序是因為可以盡量的少的修改寫好的文件。
建立實體類別: 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; } }
建立資料存取介面
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); }
<?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> <!-- 查询学生,根据id --> <select id="getStudent" parameterType="String" resultType="StudentEntity" resultMap="studentResultMap"> <![CDATA[ SELECT * from STUDENT_TBL ST WHERE ST.STUDENT_ID = #{studentID} ]]> </select> <!-- 查询学生列表 --> <select id="getStudentAll" resultType="commanagerdatamodelStudentEntity" resultMap="studentResultMap"> <![CDATA[ SELECT * from STUDENT_TBL ]]> </select> </mapper>
<?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>
<!-- 导入属性配置文件 --> <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>
@Repository @Transactional public interface StudentMapper { }
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="annotationClass" value="org.springframework.stereotype.Repository"/> <property name="basePackage" value="comlimingmanager"/> <property name="sqlSessionFactory" ref="sqlSessionFactory"/> </bean>
@Controller public class TestController { @Autowired private StudentMapper studentMapper; @RequestMapping(value = "index.do") public void indexPage() { StudentEntity entity = studentMappergetStudent("10000013"); System.out.println("name:" + entity.getStudentName()); } }
@RunWith(value = SpringJUnit4ClassRunner.class) @ContextConfiguration(value = "test-servletxml") 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()); } } }
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