1.建立Maven項目,項目名稱mybatisdemo1,目錄結構如圖所示
![QQ截圖20170417164234.png wKiom1j0gDbyHyR6AAAsZRvqdQA512.png-wh_50](http://static.javashuo.com/static/loading.gif)
2.pom.xml中配置內容以下
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany</groupId>
<artifactId>mybatisdemo1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build/>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.7</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.39</version>
</dependency>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
</dependencies>
</project>
3.在src/main/java目錄建立實體類StudentBean,包名(com.mycompany.beans),目錄結構以下
![QQ截圖20170417164457.png wKiom1j0gMOAAhQBAABAvCYKboI283.png-wh_50](http://static.javashuo.com/static/loading.gif)
4.實體類StudentBean的內容以下
package com.mycompany.beans;
public class StudentBean {
private Integer sid;
private String name;
public StudentBean() {
super();
}
public StudentBean(String name) {
super();
this.name = name;
}
public StudentBean(Integer sid, String name) {
super();
this.sid = sid;
this.name = name;
}
public Integer getSid() {
return sid;
}
public void setSid(Integer sid) {
this.sid = sid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String toString() {
return "StudentBean [sid="+sid+",name="+name+"]";
}
}
5.在src/main/java下建立接口StudentMapper,包名(com.mycompany.mapper)目錄結構以下
![QQ截圖20170417164645.png wKiom1j0gS_AWSLKAABGqfA7sTU243.png-wh_50](http://static.javashuo.com/static/loading.gif)
6.接口StudentMapperr的內容以下
package com.mycompany.mapper;
import java.util.List;
import com.mycompany.beans.StudentBean;
public interface StudentMapper {
/**
* 新增用戶
* @param student
* @return
* @throws Exception
*/
public int insertStudent(StudentBean student) throws Exception;
/**
* 修改用戶
* @param student
* @param sid
* @return
* @throws Exception
*/
public int updateStudent(StudentBean student) throws Exception;
/**
* 刪除用戶
* @return
* @throws Exception
*/
public int deleteStudent(int sid) throws Exception;
/**
* 根據ID查詢學生信息
* @return
* @throws Exception
*/
public StudentBean selectStudentById(int sid) throws Exception;
/**
* 查詢全部的學生信息
* @return
* @throws Exception
*/
public List<StudentBean> selectAllStudent() throws Exception;
}
7.在src/main/java下建立映射文件StudentMapper.xml,包名(com.mycompany.mapper),目錄結構以下
![QQ截圖20170417164855.png wKioL1j0gbLQrBfeAABHi8KfftI138.png-wh_50](http://static.javashuo.com/static/loading.gif)
8.映射文件StudentMapper.xml的內容以下
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org/DTD Mapper 3.0" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mycompany.mapper.StudentMapper">
<!--
添加學生信息
在各類標籤中的id屬性必須和接口中的方法名相同 , id屬性值必須是惟一的,不可以重複使用。
parameterType屬性指明查詢時使用的參數類型,resultType屬性指明查詢返回的結果集類型
-->
<insert id="insertStudent" useGeneratedKeys="true" keyProperty="sid">
INSERT INTO student (name) VALUES (#{name})
</insert>
<!-- 修改學生信息 -->
<update id="updateStudent" parameterType="com.mycompany.beans.StudentBean">
UPDATE student SET name = #{name} WHERE sid = #{sid}
</update>
<!-- 刪除學生信息 -->
<delete id="deleteStudent" parameterType="int">
DELETE FROM student WHERE sid=#{sid}
</delete>
<!-- 根據ID查詢學生信息 -->
<select id="selectStudentById" parameterType="int" resultMap="studentMap">
SELECT * FROM student WHERE sid=#{sid}
</select>
<!-- 查詢全部學生信息 -->
<select id="selectAllStudent" resultMap="studentMap">
SELECT * FROM student
</select>
<resultMap type="StudentBean" id="studentMap">
<id property="sid" column="sid" javaType="java.lang.Integer"/>
<result property="name" column="name" javaType="java.lang.String"/>
</resultMap>
</mapper>
9.在src/main/java下建立工具類DBUtils,包名(com.mycompany.util)目錄結構以下
![QQ截圖20170417165120.png wKiom1j0gkHCSZILAABIAlUX2Mk591.png-wh_50](http://static.javashuo.com/static/loading.gif)
10.工具類DBUtils的內容以下
package com.mycompany.util;
import java.io.IOException;
import java.io.Reader;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
public class DBUtils {
public static SqlSessionFactory sessionFactory;
static{
try {
Reader reader = Resources.getResourceAsReader("mybatis.cfg.xml");
sessionFactory = new SqlSessionFactoryBuilder().build(reader);
} catch (IOException e) {
e.printStackTrace();
}
}
public static SqlSession getSession(){
return sessionFactory.openSession();
}
}
11.在src/main/resources下建立mysql.properties屬性文件,目錄結構以下
![QQ截圖20170417165308.png wKioL1j0gq7gjAPmAAA18NDVJ3k456.png-wh_50](http://static.javashuo.com/static/loading.gif)
12.mysql.properties屬性文件內容以下
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test
jdbc.username=root
jdbc.password=
13.在src/main/resources下建立mybatis配置文件mybatis.cfg.xml,目錄結構以下
![QQ截圖20170417165440.png wKioL1j0gwrxh5YmAAA6F_O9DCA084.png-wh_50](http://static.javashuo.com/static/loading.gif)
14.配置文件mybatis.cfg.xml的內容以下
<?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>
<!-- 引入外部配置文件 -->
<properties resource="mysql.properties"></properties>
<typeAliases>
<package name="com.mycompany.beans"/>
</typeAliases>
<!-- 配置mybatis運行環境 -->
<environments default="mybatis">
<environment id="mybatis">
<!-- type="JDBC" 表明使用JDBC的提交和回滾來管理事務 -->
<transactionManager type="JDBC" />
<!-- mybatis提供了3種數據源類型,分別是:POOLED,UNPOOLED,JNDI -->
<!-- POOLED 表示支持JDBC數據源鏈接池 -->
<!-- UNPOOLED 表示不支持數據源鏈接池 -->
<!-- JNDI 表示支持外部數據源鏈接池 -->
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</dataSource>
</environment>
</environments>
<mappers>
<package name="com/mycompany/mapper"/>
</mappers>
</configuration>
15.在src/main/java下建立StudentService文件,包名(com.mycompany.service),目錄結構以下
![QQ截圖20170417165632.png wKioL1j0g3jzo5WQAAA8_AbjjzU856.png-wh_50](http://static.javashuo.com/static/loading.gif)
16.StudentService文件的內容以下
package com.mycompany.service;
import java.util.List;
import org.apache.ibatis.session.SqlSession;
import com.mycompany.beans.StudentBean;
import com.mycompany.mapper.StudentMapper;
import com.mycompany.util.DBUtils;
public class StudentService {
/**
* 添加學生信息
* @param student
*/
public void insertStudent(StudentBean student){
SqlSession session = DBUtils.getSession();
StudentMapper mapper = session.getMapper(StudentMapper.class);
try {
int result = mapper.insertStudent(student);
System.out.println(result);
session.commit();
} catch (Exception e) {
e.printStackTrace();
session.rollback();
}
}
/**
* 修改學生信息
* @param student
*/
public void updateStudent(StudentBean student){
SqlSession session = DBUtils.getSession();
StudentMapper mapper = session.getMapper(StudentMapper.class);
try {
int result = mapper.updateStudent(student);
System.out.println(result);
session.commit();
} catch (Exception e) {
e.printStackTrace();
session.rollback();
}
}
/**
* 刪除學生信息
* @param sid
*/
public void deleteStudent(int sid){
SqlSession session = DBUtils.getSession();
StudentMapper mapper = session.getMapper(StudentMapper.class);
try {
int result = mapper.deleteStudent(sid);
System.out.println(result);
session.commit();
} catch (Exception e) {
e.printStackTrace();
session.rollback();
}
}
/**
* 根據ID查詢學生信息
* @param sid
*/
public void selectStudentById(int sid){
SqlSession session = DBUtils.getSession();
StudentMapper mapper = session.getMapper(StudentMapper.class);
try {
StudentBean student = mapper.selectStudentById(sid);
System.out.println(student);
session.commit();
} catch (Exception e) {
e.printStackTrace();
session.rollback();
}
}
/**
* 查詢全部學生信息
*/
public void selectAllStudent(){
SqlSession session = DBUtils.getSession();
StudentMapper mapper = session.getMapper(StudentMapper.class);
try {
List<StudentBean> students = mapper.selectAllStudent();
for (StudentBean studentBean : students) {
System.out.println(studentBean);
}
session.commit();
} catch (Exception e) {
e.printStackTrace();
session.rollback();
}
}
}
17.在src/test/java下建立StudentServiceTest測試類,包名(com.mycompany.service)目錄結構以下
![QQ截圖20170417165823.png wKiom1j0g-jDXlwkAAA3ETKh-oQ097.png-wh_50](http://static.javashuo.com/static/loading.gif)
18.StudentServiceTest測試類的內容以下
package com.mycompany.service;
import org.junit.Test;
import com.mycompany.beans.StudentBean;
public class StudentServiceTest {
/**
* 測試添加學生信息操做
*/
@Test
public void insertStudentTest(){
StudentService studentService = new StudentService();
StudentBean student = new StudentBean("test insert");
studentService.insertStudent(student);
}
/**
* 測試修改學生信息操做
*/
@Test
public void updateStudent(){
StudentService studentService = new StudentService();
StudentBean studentBean = new StudentBean(5,"test update");
studentService.updateStudent(studentBean);
}
/**
* 測試刪除學生信息操做
*/
@Test
public void deleteStudent(){
StudentService studentService = new StudentService();
studentService.deleteStudent(7);
}
/**
* 測試根據ID查詢學生信息
*/
@Test
public void selectStudentById(){
StudentService studentService = new StudentService();
studentService.selectStudentById(8);
}
/**
* 測試查詢全部學生信息
*/
@Test
public void selectAllStudent(){
StudentService studentService = new StudentService();
studentService.selectAllStudent();
}
}
![QQ截圖20170324102905.png wKioL1j0hByg-S04AABwCKMO5XE472.png-wh_50](http://static.javashuo.com/static/loading.gif)