标签：aging list return 下载地址 ibatis mybatis open alt nbsp
1.MyBatis是什么？(下载地址：https://github.com/mybatis/mybatis-3/releases)
MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code，并且改名为MyBatis，实质上Mybatis对ibatis进行一些改进。
MyBatis是一个优秀的持久层框架，它对jdbc的操作数据库的过程进行封装，使开发者只需要关注 SQL 本身，而不需要花费精力去处理例如注册驱动、创建connection、创建statement、手动设置参数、结果集检索等jdbc繁杂的过程代码。
Mybatis通过xml或注解的方式将要执行的各种statement（statement、preparedStatemnt、CallableStatement）配置起来，并通过java对象和statement中的sql进行映射生成最终执行的sql语句，最后由mybatis框架执行sql并将结果映射成java对象并返回。
1.pox.xmljar包
<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>cn.jpp</groupId> <artifactId>SpringMVC_MyBatis_01base</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <name>SpringMVC_MyBatis_01base</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.18</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.2.2</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>RELEASE</version> </dependency> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.2.0.1.0</version> </dependency> </dependencies> <build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> </resource> </resources> </build> </project>
2.mybatis-config.xml（mybatis的配置文件）
<?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> <!--1.1锁定要确定的类型--> <!--<typeAlias type="cn.entity.Student" alias="Student"></typeAlias>--> <package name="cn.happyb.entity"></package> </typeAliases> <environments default="mysql"> <environment id="mysql"> <!-- 使用jdbc的事务 --> <transactionManager type="JDBC" /> <!-- 使用自带的连接池 --> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:3306/test" /> <property name="username" value="jpp" /> <property name="password" value="jpp" /> </dataSource> </environment> </environments> <mappers> <mapper resource="cn/happyb/dao/StudentDAO.xml" /> </mappers> </configuration>
3.实体类(Student)
package cn.happyb.entity; import java.util.Date; /** * Created by 景佩佩 on 2017-01-19. */ public class Student { private Integer stuno; private String stuname; private Integer stuage; private Date studate; @Override public String toString() { return "Student{" + "stuno=" + stuno + ", stuname=‘" + stuname + ‘\‘‘ + ", stuage=" + stuage + ", studate=" + studate + ‘}‘; } public Integer getStuno() { return stuno; } public void setStuno(Integer stuno) { this.stuno = stuno; } public String getStuname() { return stuname; } public void setStuname(String stuname) { this.stuname = stuname; } public Integer getStuage() { return stuage; } public void setStuage(Integer stuage) { this.stuage = stuage; } public Date getStudate() { return studate; } public void setStudate(Date studate) { this.studate = studate; } }
StudentDao.java
package cn.happyb.dao; import cn.happyb.entity.Student; import java.io.IOException; import java.util.List; /** * Created by 景佩佩 on 2017-01-19. * 用来操作数据库的接口 */ public interface IStudentDAO { /** * 新增学生 * * @param stu * @return * @throws IOException */ public int addStu(Student stu); /** * 删除学生 * @param id * @return * @throws IOException */ public int delStu(int id) throws IOException; /** * 更新学生信息 * @param stu * @return */ public int editStu(Student stu); /** * 查询所有记录 * @return */ public List<Student> findAll(); }
StudentDaoImpl.java
package cn.happyb.dao; import cn.happyb.entity.Student; import cn.happyb.util.MyBatisUtil; import org.apache.ibatis.session.SqlSession; import java.io.IOException; import java.util.List; /** * Created by 景佩佩 on 2017-01-19. */ public class StudentDAOImpl implements IStudentDAO { public int addStu(Student stu) { //和数据库通信的入口，session对象 SqlSession session = MyBatisUtil.getSession(); int flag = session.insert("addstu", stu); // session.delete("addstu", stu); session.commit(); return flag; } public int delStu(int id) throws IOException { SqlSession session=MyBatisUtil.getSession(); int result=session.delete("delStu",id); session.commit(); session.close(); return result; } public int editStu(Student stu) { SqlSession session=MyBatisUtil.getSession(); int result=session.update("editStu",stu); session.commit(); session.close(); return result; } public List<Student> findAll() { SqlSession session=MyBatisUtil.getSession(); List<Student> list=session.selectList("findAll"); session.close();; return list; } }
StudentDAO.xml
<?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="cn.happyb.dao"> <insert id="addstu"> insert into student(stuname,stuage,studate) values(#{stuname},#{stuage},#{studate}) <selectKey resultType="int" keyProperty="stuno"> select @@IDENTITY </selectKey> </insert> <delete id="delStu"> DELETE from student where stuno=#{stuno} </delete> <update id="editStu"> UPDATE student SET stuname=#{stuname} where stuno=#{stuno} </update> <select id="findAll" resultType="Student"> select * from student </select> </mapper>
上面是按MySQL的方式写的，如果是Oracle的方式的话而oracle则需要使用序列
MybatisUtil.java
package cn.happyb.util; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import java.io.IOException; import java.io.InputStream; /** * Created by 景佩佩 on 2017-01-19. * Mybatis工具类 */ public class MyBatisUtil { private static String config="mybatis-config.xml"; public static SqlSession getSession() { try { InputStream stream = Resources.getResourceAsStream(config); SqlSessionFactory factory=new SqlSessionFactoryBuilder().build(stream); return factory.openSession(); } catch (IOException e) { e.printStackTrace(); } return null; } }
MyTest.java
package cn.happyb; import cn.happyb.dao.StudentDAOImpl; import cn.happyb.entity.Student; import org.junit.Test; import java.io.IOException; import java.util.Date; import java.util.List; /** * Created by 景佩佩 on 2017-01-19. */ public class FirstTest { StudentDAOImpl dao=new StudentDAOImpl(); @Test public void testAdd(){ Student stu=new Student(); stu.setStuname("aa"); stu.setStudate(new Date()); stu.setStuage(18); System.out.println("添加前===================="); System.out.println(stu); dao.addStu(stu); System.out.println("添加前===================="); System.out.println(stu); } @Test public void delStu() throws IOException{ dao.delStu(2); System.out.print("删除成功"); } @Test public void editStu(){ Student stu=new Student(); stu.setStuno(1); stu.setStuname("hehe"); dao.editStu(stu); System.out.print("修改成功"); } @Test public void findAll(){ List<Student> list=dao.findAll(); for (Student stu:list) { System.out.println(stu.getStuname()); } } }
标签：aging list return 下载地址 ibatis mybatis open alt nbsp
原文地址：http://www.cnblogs.com/jingpeipei/p/6339804.html
