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1、题目形容
2、参考解答
com.controller 包下的 BookController.java
package com.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import com.dao.BookDao;
import com.po.MyBook;
@Controller("bookController")
public class BookController {
@Autowired
private BookDao bookDao;
public void test() {
// 查问一条书籍记录
MyBook abook = bookDao.selectBookBySN(1);
System.out.println(abook);
System.out.println("================");
// 增加一条书籍记录
MyBook addmb = new MyBook();
addmb.setBookName("西游记");
addmb.setBookPrice((float) 24.6);
int add = bookDao.addBook(addmb);
System.out.println("增加了" + add + "条记录");
System.out.println("================");
// 批改一条书籍记录
MyBook updatemb = new MyBook();
updatemb.setSn(1);
updatemb.setBookName("红楼梦");
updatemb.setBookPrice((float) 35.3);
int up = bookDao.updateBook(updatemb);
System.out.println("批改了" + up + "条记录");
System.out.println("================");
// 删除一条书籍记录
int dl = bookDao.deleteBook(9);
System.out.println("删除了" + dl + "条记录");
System.out.println("================");
// 查问所有书籍记录
List<MyBook> list = bookDao.selectAllBook();
for (MyBook myBook : list) {System.out.println(myBook);
}
}
}
com.controller 包下的 TestController.java
package com.controller;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestController {public static void main(String[] args) {ApplicationContext appCon = new ClassPathXmlApplicationContext("applicationContext.xml");
BookController bc = (BookController)appCon.getBean("bookController");
bc.test();}
}
com.dao 包下的 BookDao.java
package com.dao;
import java.util.List;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import com.po.MyBook;
@Repository("bookDao")
@Mapper
/* 应用 Spring 主动扫描 MyBatis 的接口并拆卸(Spring 将指定包中所有被 @Mapper 注解标注的接口主动拆卸为 MyBatis 的映射接口 */
public interface BookDao {
/**
* 接口办法对应 SQL 映射文件 UserMapper.xml 中的 id
*/
public MyBook selectBookBySN(Integer sn);
public List<MyBook> selectAllBook();
public int addBook(MyBook book);
public int updateBook(MyBook book);
public int deleteBook(Integer sn);
}
com.mybatis 包下的 BookMapper.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="com.dao.BookDao">
<!-- 依据 sn 查问书籍记录 -->
<select id="selectBookBySN" parameterType="Integer"
resultType="com.po.MyBook">
select * from book where sn=#{sn}
</select>
<!-- 查问所有书籍信息 -->
<select id="selectAllBook" resultType="com.po.MyBook">
select * from book
</select>
<!-- 增加一条书籍记录,#{bookName} 为 com.po.MyBook 的属性值 -->
<insert id="addBook" parameterType="com.po.MyBook">
insert into book (bookName,bookPrice) values(#{bookName},#{bookPrice})
</insert>
<!-- 批改一条书籍记录 -->
<update id="updateBook" parameterType="com.po.MyBook">
update book set bookName = #{bookName},bookPrice = #{bookPrice} where sn=#{sn}
</update>
<!-- 删除一条书籍记录 -->
<delete id="deleteBook" parameterType="Integer">
delete from book where sn=#{sn}
</delete>
</mapper>
com.mybatis 包下的 mybatis-config.xml
<?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>
<!-- 通知 MyBatis 到哪里去找映射文件 -->
<mappers>
<mapper resource="com/mybatis/BookMapper.xml"/>
</mappers>
</configuration>
com.mybatis.mapper 包下的 BookMapper.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="com.dao.UserDao">
<!-- 依据 sn 查问书籍记录 -->
<select id="selectBookBySN" parameterType="Integer"
resultType="com.po.MyBook">
select * from book where sn = #{sn}
</select>
<!-- 查问所有书籍信息 -->
<select id="selectAllBook" resultType="com.po.MyBook">
select * from book
</select>
<!-- 增加一条书籍记录,#{bookName} 为 com.po.MyBook 的属性值 -->
<insert id="addBook" parameterType="com.po.MyBook">
insert into book (bookName,bookPrice) values(#{bookName},#{bookPrice})
</insert>
<!-- 批改一条书籍记录 -->
<update id="updateBook" parameterType="com.po.MyBook">
update book set bookName = #{bookName},bookPrice = #{bookPrice} where sn = #{sn}
</update>
<!-- 删除一条书籍记录 -->
<delete id="deleteBook" parameterType="Integer">
delete from user where sn = #{sn}
</delete>
</mapper>
com.mybatis.po 包下的 MyBook.java
package com.mybatis.po;
/**
*springtest 数据库中 book 表的长久化类
*/
public class MyBook {
private Integer sn;// 主键
private String bookName;
private Float bookPrice;
public Integer getSn() {return sn;}
public void setSn(Integer sn) {this.sn = sn;}
public String getBookName() {return bookName;}
public void setBookName(String bookName) {this.bookName = bookName;}
public Float getBookPrice() {return bookPrice;}
public void setBookPrice(Float bookPrice) {this.bookPrice = bookPrice;}
@Override
public String toString() {return "MyBook [sn=" + sn + ", bookName=" + bookName + ", bookPrice=" + bookPrice + "]";
}
}
com.mybatis.test 包下的 MyBatisTest.java
package com.mybatis.test;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
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 com.mybatis.po.MyBook;
public class MyBatisTest {public static void main(String[] args) {
try {
// 读取配置文件 mybatis-config.xml
InputStream config = Resources.getResourceAsStream("mybatis-config.xml");
// 依据配置文件构建 SqlSessionFactory
SqlSessionFactory ssf = new SqlSessionFactoryBuilder().build(config);
// 通过 SqlSessionFactory 创立 SqlSession
SqlSession ss = ssf.openSession();
//SqlSession 执行映射文件中定义的 SQL,并返回映射后果
//com.mybatis.mapper.UserMapper.selectUserById 为 UserMapper.xml 中的命名空间 +select 的 id
// 查问一条书籍记录
MyBook mb = ss.selectOne("com.mybatis.mapper.BookMapper.selectBookBySN", 1);
System.out.println(mb);
// 增加一条书籍记录
MyBook addmb = new MyBook();
addmb.setSn(24);
addmb.setBookName("三国演义");
addmb.setBookPrice((float) 50.2);
ss.insert("com.mybatis.mapper.BookMapper.addBook",addmb);
// 批改一条书籍记录
MyBook updatemb = new MyBook();
updatemb.setSn(1);
updatemb.setBookName("水浒传");
updatemb.setBookPrice((float) 40.1);
ss.update("com.mybatis.mapper.BookMapper.updateBook", updatemb);
// 删除一条书籍记录
ss.delete("com.mybatis.mapper.BookMapper.deleteBook", 3);
// 查问所有书籍记录
List<MyBook> listMb = ss.selectList("com.mybatis.mapper.BookMapper.selectAllBook");
for (MyBook myBook : listMb) {System.out.println(myBook);
}
// 提交事务
ss.commit();
// 敞开 SqlSession
ss.close();} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();}
}
}
com.po 包下的 MyBook.java
package com.po;
/**
*springtest 数据库中 book 表的长久化类
*/
public class MyBook {
private Integer sn;// 主键
private String bookName;
private Float bookPrice;
public Integer getSn() {return sn;}
public void setSn(Integer sn) {this.sn = sn;}
public String getBookName() {return bookName;}
public void setBookName(String bookName) {this.bookName = bookName;}
public Float getBookPrice() {return bookPrice;}
public void setBookPrice(Float bookPrice) {this.bookPrice = bookPrice;}
@Override
public String toString() {return "MyBook [sn=" + sn + ", bookName=" + bookName + ", bookPrice=" + bookPrice + "]";
}
}
applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 指定须要扫描的包(包含子包),使注解失效 -->
<context:component-scan base-package="com.dao"/>
<context:component-scan base-package="com.controller"/>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/springtest?characterEncoding=utf8&useSSL=false"/>
<property name="username" value="root" />
<property name="password" value="123456" />
<!-- 最大连接数 -->
<property name="maxTotal" value="30"/>
<!-- 最大闲暇连接数 -->
<property name="maxIdle" value="10"/>
<!-- 初始化连接数 -->
<property name="initialSize" value="5"/>
</bean>
<!-- 增加事务反对 -->
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 开启事务注解 -->
<tx:annotation-driven transaction-manager="txManager" />
<!-- 配置 MyBatis 工厂,同时指定数据源,并与 MyBatis 完满整合 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- configLocation 的属性值为 MyBatis 的外围配置文件 -->
<property name="configLocation" value="classpath:com/mybatis/mybatis-config.xml"/>
</bean>
<!--Mapper 代理开发,应用 Spring 主动扫描 MyBatis 的接口并拆卸(Spring 将指定包中所有被 @Mapper 注解标注的接口主动拆卸为 MyBatis 的映射接口)-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- mybatis-spring 组件的扫描器 -->
<property name="basePackage" value="com.dao"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
</beans>
log4j.properties
# Global logging configuration
log4j.rootLogger=ERROR, stdout
# MyBatis logging configuration...
log4j.logger.com.dao=DEBUG
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
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