spring共四天
第一天:spring框架的概述以及spring中基于XML的IOC配置
第二天:spring中基于注解的IOC和ioc的案例
第三天:spring中的aop和基于XML以及注解的AOP配置
第四天:spring中的JdbcTemlate以及Spring事务控制
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1、spring的概述spring是什么spring的两大核心spring的发展历程和优势spring体系结构
2、程序的耦合及解耦曾经案例中问题工厂模式解耦
3、IOC概念和spring中的IOCspring中基于XML的IOC环境搭建
4、依赖注入(Dependency Injection)
1 Spring第一天
1.1 程序耦合问题
package com.iteima.jdbc;import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;/*** 程序的耦合* 耦合:程序间的依赖关系* 包括:* 类之间的依赖* 方法间的依赖* 解耦:* 降低程序间的依赖关系* 实际开发中:* 应该做到:编译期不依赖,运行时才依赖* 解耦的思路:* 第一步:使用反射来创建对象,而避免使用new关键字* 第二步:通过读取配置文件来获取要创建的对象全限定类名*/
public class JdbcDemo1 {public static void main(String[] args) throws Exception {//1.注册驱动
// DriverManager.registerDriver(new com.mysql.jdbc.Driver());Class.forName("com.mysql.jdbc.Driver");//2.获取连接Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/eesy", "root", "1234");//3.获取操作数据库的预处理对象PreparedStatement pstm = conn.prepareStatement("select * from account");//4.执行SQL,得到结果集ResultSet rs = pstm.executeQuery();//5.遍历结果集while(rs.next()) {System.out.println(rs.getString("name"));}//6.释放资源rs.close();pstm.close();conn.close();}
}
1.2 解耦
- IAccountDao.java;
package com.itheima.dao;/*** 账户的持久层接口*/
public interface IAccountDao {/*** 模拟保存账户*/void saveAccount();
}
- AccountDaoImpl.java;
package com.itheima.dao.impl;import com.itheima.dao.IAccountDao;/*** 账户的持久层实现类*/
public class AccountDaoImpl implements IAccountDao {public void saveAccount() {System.out.println("保存了账户");}
}
- IAccountService.java;
package com.itheima.service;/*** 账户业务层的接口*/
public interface IAccountService {/*** 模拟保存账户*/void saveAccount();
}
- AccountServiceImpl.java;
package com.itheima.service.impl;import com.itheima.dao.IAccountDao;
import com.itheima.factory.BeanFactory;
import com.itheima.service.IAccountService;/*** 账户的业务层实现类*/
public class AccountServiceImpl implements IAccountService {
// private IAccountDao accountDao = new AccountDaoImpl();private IAccountDao accountDao = (IAccountDao)BeanFactory.getBean("accountDao");
// private int i = 1;public void saveAccount() {int i = 1;accountDao.saveAccount();System.out.println(i);i++;}
}
- Client.java;
package com.itheima.ui;import com.itheima.factory.BeanFactory;
import com.itheima.service.IAccountService;/*** 模拟一个表现层,用于调用业务层*/
public class Client {public static void main(String[] args) {//IAccountService as = new AccountServiceImpl();for(int i = 0; i < 5; i++) {IAccountService as = (IAccountService) BeanFactory.getBean("accountService");System.out.println(as);as.saveAccount();}}
}
- BeanFactory.java;
package com.itheima.factory;import java.io.InputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;/*** 一个创建Bean对象的工厂* Bean:在计算机英语中,有可重用组件的含义* JavaBean:用java语言编写的可重用组件* javabean > 实体类* 它就是创建我们的service和dao对象的* 第一个:需要一个配置文件来配置我们的service和dao* 配置的内容:唯一标识=全限定类名(key=value)* 第二个:通过读取配置文件中配置的内容,反射创建对象* 我的配置文件可以是xml也可以是properties*/
public class BeanFactory {//定义一个Properties对象private static Properties props;//定义一个Map,用于存放我们要创建的对象,我们把它称之为容器private static Map<String, Object> beans;//使用静态代码块为Properties对象赋值static {try {//实例化对象props = new Properties();//获取properties文件的流对象InputStream in = BeanFactory.class.getClassLoader().getResourceAsStream("bean.properties");props.load(in);//实例化容器beans = new HashMap<String, Object>();//取出配置文件中所有的KeyEnumeration keys = props.keys();//遍历枚举while (keys.hasMoreElements()) {//取出每个KeyString key = keys.nextElement().toString();//根据key获取valueString beanPath = props.getProperty(key);//反射创建对象Object value = Class.forName(beanPath).newInstance();//把key和value存入容器中beans.put(key, value);}} catch (Exception e) {throw new ExceptionInInitializerError("初始化properties失败!");}}/*** 根据bean的名称获取对象*/public static Object getBean(String beanName) {return beans.get(beanName);}/*** 根据Bean的名称获取bean对象public static Object getBean(String beanName) {Object bean = null;try {String beanPath = props.getProperty(beanName);
// System.out.println(beanPath);bean = Class.forName(beanPath).newInstance();//每次都会调用默认构造函数创建对象} catch (Exception e) {e.printStackTrace();}return bean;}*/
}
- Bean.properties;
accountService=com.itheima.service.impl.AccountServiceImpl
accountDao=com.itheima.dao.impl.AccountDaoImpl
- 单例与多例;
1.3 IOC
- IAccountDao.java;
package com.itheima.dao;/*** 账户的持久层接口*/
public interface IAccountDao {/*** 模拟保存账户*/void saveAccount();
}
- AccountDaoImpl.java;
package com.itheima.dao.impl;import com.itheima.dao.IAccountDao;/*** 账户的持久层实现类*/
public class AccountDaoImpl implements IAccountDao {public void saveAccount(){System.out.println("保存了账户");}
}
- IAccountService.java;
package com.itheima.service;/*** 账户业务层的接口*/
public interface IAccountService {/*** 模拟保存账户*/void saveAccount();
}
- AccountServiceImpl.java;
package com.itheima.service.impl;import com.itheima.dao.IAccountDao;
import com.itheima.service.IAccountService;/*** 账户的业务层实现类*/
public class AccountServiceImpl implements IAccountService {private IAccountDao accountDao ;public AccountServiceImpl(){System.out.println("对象创建了");}public void saveAccount(){accountDao.saveAccount();}
}
- Client.java;
package com.itheima.ui;import com.itheima.dao.IAccountDao;
import com.itheima.service.IAccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;/*** 模拟一个表现层,用于调用业务层*/
public class Client {/*** 获取spring的Ioc核心容器,并根据id获取对象* ApplicationContext的三个常用实现类:* ClassPathXmlApplicationContext:它可以加载类路径下的配置文件,要求配置文件必须在类路径下,不在的话,加载不了,(更常用)* FileSystemXmlApplicationContext:它可以加载磁盘任意路径下的配置文件(必须有访问权限)* AnnotationConfigApplicationContext:它是用于读取注解创建容器的,是明天的内容* 核心容器的两个接口引发出的问题:* ApplicationContext: 单例对象适用 采用此接口* 它在构建核心容器时,创建对象采取的策略是采用立即加载的方式,也就是说,只要一读取完配置文件马上就创建配置文件中配置的对象* BeanFactory: 多例对象使用* 它在构建核心容器时,创建对象采取的策略是采用延迟加载的方式,也就是说,什么时候根据id获取对象了,什么时候才真正的创建对象*/public static void main(String[] args) {//1.获取核心容器对象ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
// ApplicationContext ac = new FileSystemXmlApplicationContext("C:UserszhyDesktopbean.xml");//2.根据id获取Bean对象IAccountService as = (IAccountService)ac.getBean("accountService");IAccountDao adao = ac.getBean("accountDao",IAccountDao.class);System.out.println(as);System.out.println(adao);as.saveAccount();//--------BeanFactory----------
// Resource resource = new ClassPathResource("bean.xml");
// BeanFactory factory = new XmlBeanFactory(resource);
// IAccountService as = (IAccountService)factory.getBean("accountService");
// System.out.println(as);}
}
- bean.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"><!--把对象的创建交给spring来管理--><bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"></bean><bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl"></bean>
</beans>
1.4 Spring三种创建Bean的方式
- IAccountService.java;
package com.itheima.service;/*** 账户业务层的接口*/
public interface IAccountService {/*** 模拟保存账户*/void saveAccount();
}
- AccountServiceImpl.java;
package com.itheima.service.impl;import com.itheima.service.IAccountService;/*** 账户的业务层实现类*/
public class AccountServiceImpl implements IAccountService {public AccountServiceImpl() {System.out.println("对象创建了");}public void saveAccount() {System.out.println("service中的saveAccount方法执行了。。。");}public void init() {System.out.println("对象初始化了。。。");}public void destroy() {System.out.println("对象销毁了。。。");}
}
- StaticFactory.java;
package com.itheima.factory;import com.itheima.service.IAccountService;
import com.itheima.service.impl.AccountServiceImpl;/*** 模拟一个工厂类(该类可能是存在于jar包中的,我们无法通过修改源码的方式来提供默认构造函数)*/
public class StaticFactory {public static IAccountService getAccountService() {return new AccountServiceImpl();}
}
- InstanceFactory.java;
package com.itheima.factory;import com.itheima.service.IAccountService;
import com.itheima.service.impl.AccountServiceImpl;/*** 模拟一个工厂类(该类可能是存在于jar包中的,我们无法通过修改源码的方式来提供默认构造函数)*/
public class InstanceFactory {public IAccountService getAccountService() {return new AccountServiceImpl();}
}
- Client.java;
package com.itheima.ui;import com.itheima.service.IAccountService;
import org.springframework.context.support.ClassPathXmlApplicationContext;/*** 模拟一个表现层,用于调用业务层*/
public class Client {public static void main(String[] args) {//1.获取核心容器对象
// ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");//2.根据id获取Bean对象IAccountService as = (IAccountService)ac.getBean("accountService");as.saveAccount();//手动关闭容器ac.close();}
}
- bean.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"><!--把对象的创建交给spring来管理--><!--spring对bean的管理细节1.创建bean的三种方式2.bean对象的作用范围3.bean对象的生命周期--><!--创建Bean的三种方式 --><!-- 第一种方式:使用默认构造函数创建。在spring的配置文件中使用bean标签,配以id和class属性之后,且没有其他属性和标签时。采用的就是默认构造函数创建bean对象,此时如果类中没有默认构造函数,则对象无法创建。<bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"></bean>--><!-- 第二种方式: 使用普通工厂中的方法创建对象(使用某个类中的方法创建对象,并存入spring容器)<bean id="instanceFactory" class="com.itheima.factory.InstanceFactory"></bean><bean id="accountService" factory-bean="instanceFactory" factory-method="getAccountService"></bean>--><!-- 第三种方式:使用工厂中的静态方法创建对象(使用某个类中的静态方法创建对象,并存入spring容器)<bean id="accountService" class="com.itheima.factory.StaticFactory" factory-method="getAccountService"></bean>--><!-- bean的作用范围调整bean标签的scope属性:作用:用于指定bean的作用范围取值:常用的就是单例的和多例的singleton:单例的(默认值)prototype:多例的request:作用于web应用的请求范围session:作用于web应用的会话范围global-session:作用于集群环境的会话范围(全局会话范围),当不是集群环境时,它就是session<bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl" scope="prototype"></bean>--><!-- bean对象的生命周期单例对象出生:当容器创建时对象出生活着:只要容器还在,对象一直活着死亡:容器销毁,对象消亡总结:单例对象的生命周期和容器相同多例对象出生:当我们使用对象时spring框架为我们创建活着:对象只要是在使用过程中就一直活着。死亡:当对象长时间不用,且没有别的对象引用时,由Java的垃圾回收器回收--><bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"scope="prototype" init-method="init" destroy-method="destroy"></bean>
</beans>
1.5 Spring依赖注入
- AccountServiceImpl.java;
package com.itheima.service.impl;import com.itheima.service.IAccountService;
import java.util.Date;/*** 账户的业务层实现类*/
public class AccountServiceImpl implements IAccountService {//如果是经常变化的数据,并不适用于注入的方式private String name;private Integer age;private Date birthday;public AccountServiceImpl(String name, Integer age, Date birthday) {this.name = name;this.age = age;this.birthday = birthday;}public void saveAccount() {System.out.println("service中的saveAccount方法执行了。。。" + name + "," + age + "," + birthday);}
}
- AccountServiceImpl2.java;
package com.itheima.service.impl;import com.itheima.service.IAccountService;
import java.util.Date;/*** 账户的业务层实现类*/
public class AccountServiceImpl2 implements IAccountService {//如果是经常变化的数据,并不适用于注入的方式private String name;private Integer age;private Date birthday;public void setName(String name) {this.name = name;}public void setAge(Integer age) {this.age = age;}public void setBirthday(Date birthday) {this.birthday = birthday;}public void saveAccount() {System.out.println("service中的saveAccount方法执行了。。。" + name + "," + age + "," + birthday);}
}
- AccountServiceImpl3.java;
package com.itheima.service.impl;import com.itheima.service.IAccountService;
import java.util.Arrays;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.Map;/*** 账户的业务层实现类*/
public class AccountServiceImpl3 implements IAccountService {private String[] myStrs;private List<String> myList;private Set<String> mySet;private Map<String, String> myMap;private Properties myProps;public void setMyStrs(String[] myStrs) {this.myStrs = myStrs;}public void setMyList(List<String> myList) {this.myList = myList;}public void setMySet(Set<String> mySet) {this.mySet = mySet;}public void setMyMap(Map<String, String> myMap) {this.myMap = myMap;}public void setMyProps(Properties myProps) {this.myProps = myProps;}public void saveAccount(){System.out.println(Arrays.toString(myStrs));System.out.println(myList);System.out.println(mySet);System.out.println(myMap);System.out.println(myProps);}
}
- IAccountService.java;
package com.itheima.service;/*** 账户业务层的接口*/
public interface IAccountService {/*** 模拟保存账户*/void saveAccount();
}
- Client.java;
package com.itheima.ui;import com.itheima.service.IAccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;/*** 模拟一个表现层,用于调用业务层*/
public class Client {public static void main(String[] args) {//1.获取核心容器对象ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");//2.根据id获取Bean对象
// IAccountService as = (IAccountService)ac.getBean("accountService");
// as.saveAccount();
// IAccountService as = (IAccountService)ac.getBean("accountService2");
// as.saveAccount();IAccountService as = (IAccountService)ac.getBean("accountService3");as.saveAccount();}
}
- bean.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"><!-- spring中的依赖注入依赖注入:Dependency InjectionIOC的作用:降低程序间的耦合(依赖关系)依赖关系的管理:以后都交给spring来维护在当前类需要用到其他类的对象,由spring为我们提供,我们只需要在配置文件中说明依赖关系的维护:就称之为依赖注入依赖注入:能注入的数据:有三类基本类型和String其他bean类型(在配置文件中或者注解配置过的bean)复杂类型/集合类型注入的方式:有三种第一种:使用构造函数提供第二种:使用set方法提供第三种:使用注解提供(明天的内容)--><!--构造函数注入:使用的标签:constructor-arg标签出现的位置:bean标签的内部标签中的属性type:用于指定要注入的数据的数据类型,该数据类型也是构造函数中某个或某些参数的类型index:用于指定要注入的数据给构造函数中指定索引位置的参数赋值。索引的位置是从0开始name:用于指定给构造函数中指定名称的参数赋值 常用的=============以上三个用于指定给构造函数中哪个参数赋值===============================value:用于提供基本类型和String类型的数据ref:用于指定其他的bean类型数据,它指的就是在spring的Ioc核心容器中出现过的bean对象优势:在获取bean对象时,注入数据是必须的操作,否则对象无法创建成功弊端:改变了bean对象的实例化方式,使我们在创建对象时,如果用不到这些数据,也必须提供--><bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"><constructor-arg name="name" value="泰斯特"></constructor-arg><constructor-arg name="age" value="18"></constructor-arg><constructor-arg name="birthday" ref="now"></constructor-arg></bean><!-- 配置一个日期对象 --><bean id="now" class="java.util.Date"></bean><!-- set方法注入 更常用的方式涉及的标签:property出现的位置:bean标签的内部标签的属性name:用于指定注入时所调用的set方法名称value:用于提供基本类型和String类型的数据ref:用于指定其他的bean类型数据。它指的就是在spring的Ioc核心容器中出现过的bean对象优势:创建对象时没有明确的限制,可以直接使用默认构造函数弊端:如果有某个成员必须有值,则获取对象是有可能set方法没有执行--><bean id="accountService2" class="com.itheima.service.impl.AccountServiceImpl2"><property name="name" value="TEST" ></property><property name="age" value="21"></property><property name="birthday" ref="now"></property></bean><!-- 复杂类型的注入/集合类型的注入用于给List结构集合注入的标签:list array set用于个Map结构集合注入的标签:map props结构相同,标签可以互换--><bean id="accountService3" class="com.itheima.service.impl.AccountServiceImpl3"><property name="myStrs"><set><value>AAA</value><value>BBB</value><value>CCC</value></set></property><property name="myList"><array><value>AAA</value><value>BBB</value><value>CCC</value></array></property><property name="mySet"><list><value>AAA</value><value>BBB</value><value>CCC</value></list></property><property name="myMap"><props><prop key="testC">ccc</prop><prop key="testD">ddd</prop></props></property><property name="myProps"><map><entry key="testA" value="aaa"></entry><entry key="testB"><value>BBB</value></entry></map></property></bean>
</beans>
spring第二天:spring基于注解的IOC以及IoC的案例
1、spring中ioc的常用注解
2、案例使用xml方式和注解方式实现单表的CRUD操作持久层技术选择:dbutils
3、改造基于注解的ioc案例,使用纯注解的方式实现spring的一些新注解使用
4、spring和Junit整合
2 第二天
2.1 注解IOC
- IAccountDao.java;
package com.itheima.dao;/*** 账户的持久层接口*/
public interface IAccountDao {/*** 模拟保存账户*/void saveAccount();
}
- AccountDaoImpl.java;
package com.itheima.dao.impl;import com.itheima.dao.IAccountDao;
import org.springframework.stereotype.Repository;/*** 账户的持久层实现类*/
@Repository("accountDao1")
public class AccountDaoImpl implements IAccountDao {public void saveAccount() {System.out.println("保存了账户1111111111111");}
}
- AccountDaoImpl2.java;
package com.itheima.dao.impl;import com.itheima.dao.IAccountDao;
import org.springframework.stereotype.Repository;/*** 账户的持久层实现类*/
@Repository("accountDao2")
public class AccountDaoImpl2 implements IAccountDao {public void saveAccount() {System.out.println("保存了账户2222222222222");}
}
- IAccountService.java;
package com.itheima.service;/*** 账户业务层的接口*/
public interface IAccountService {/*** 模拟保存账户*/void saveAccount();
}
- AccountServiceImpl.java;
package com.itheima.service.impl;import com.itheima.dao.IAccountDao;
import com.itheima.service.IAccountService;
import org.springframework.stereotype.Service;
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;/*** 账户的业务层实现类* 曾经XML的配置:* <bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"* scope="" init-method="" destroy-method="">* <property name="" value="" | ref=""></property>* </bean>** 用于创建对象的* 他们的作用就和在XML配置文件中编写一个<bean>标签实现的功能是一样的* Component:* 作用:用于把当前类对象存入spring容器中* 属性:* value:用于指定bean的id,当我们不写时,它的默认值是当前类名,且首字母改小写* Controller:一般用在表现层* Service:一般用在业务层* Repository:一般用在持久层* 以上三个注解他们的作用和属性与Component是一模一样* 他们三个是spring框架为我们提供明确的三层使用的注解,使我们的三层对象更加清晰** 用于注入数据的* 他们的作用就和在xml配置文件中的bean标签中写一个<property>标签的作用是一样的* Autowired:* 作用:自动按照类型注入。只要容器中有唯一的一个bean对象类型和要注入的变量类型匹配,就可以注入成功* 如果ioc容器中没有任何bean的类型和要注入的变量类型匹配,则报错* 如果Ioc容器中有多个类型匹配时:* 出现位置:* 可以是变量上,也可以是方法上* 细节:* 在使用注解注入时,set方法就不是必须的了* Qualifier:* 作用:在按照类中注入的基础之上再按照名称注入,它在给类成员注入时不能单独使用。但是在给方法参数注入时可以(稍后我们讲)* 属性:* value:用于指定注入bean的id* Resource* 作用:直接按照bean的id注入,它可以独立使用* 属性:* name:用于指定bean的id* 以上三个注入都只能注入其他bean类型的数据,而基本类型和String类型无法使用上述注解实现* 另外,集合类型的注入只能通过XML来实现** Value* 作用:用于注入基本类型和String类型的数据* 属性:* value:用于指定数据的值,它可以使用spring中SpEL(也就是spring的el表达式)* SpEL的写法:${表达式}** 用于改变作用范围的* 他们的作用就和在bean标签中使用scope属性实现的功能是一样的* Scope* 作用:用于指定bean的作用范围* 属性:* value:指定范围的取值,常用取值:singleton prototype** 和生命周期相关 了解* 他们的作用就和在bean标签中使用init-method和destroy-methode的作用是一样的* PreDestroy* 作用:用于指定销毁方法* PostConstruct* 作用:用于指定初始化方法*/
@Service("accountService")
//@Scope("prototype")
public class AccountServiceImpl implements IAccountService {// @Autowired
// @Qualifier("accountDao1")@Resource(name = "accountDao2")private IAccountDao accountDao = null;@PostConstructpublic void init() {System.out.println("初始化方法执行了");}@PreDestroypublic void destroy() {System.out.println("销毁方法执行了");}public void saveAccount() {accountDao.saveAccount();}
}
- bean.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!--告知spring在创建容器时要扫描的包,配置所需要的标签不是在beans的约束中,而是一个名称为context名称空间和约束中--><context:component-scan base-package="com.itheima"></context:component-scan>
</beans>
2.2 基于XML的IOC案例
- Account.java;
package com.itheima.domain;import java.io.Serializable;/*** 账户的实体类*/
public class Account implements Serializable {private Integer id;private String name;private Float money;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Float getMoney() {return money;}public void setMoney(Float money) {this.money = money;}@Overridepublic String toString() {return "Account{" +"id=" + id +", name='" + name + ''' +", money=" + money +'}';}
}
- IAccountDao.java;
package com.itheima.dao;import com.itheima.domain.Account;
import java.util.List;/*** 账户的持久层接口*/
public interface IAccountDao {List<Account> findAllAccount();Account findAccountById(Integer accountId);void saveAccount(Account account);void updateAccount(Account account);void deleteAccount(Integer acccountId);
}
- AccountDaoImpl.java;
package com.itheima.dao.impl;import com.itheima.dao.IAccountDao;
import com.itheima.domain.Account;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import java.util.List;/*** 账户的持久层实现类*/
public class AccountDaoImpl implements IAccountDao {private QueryRunner runner;public void setRunner(QueryRunner runner) {this.runner = runner;}@Overridepublic List<Account> findAllAccount() {try{return runner.query("select * from account", new BeanListHandler<Account>(Account.class));}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic Account findAccountById(Integer accountId) {try{return runner.query("select * from account where id = ? ", new BeanHandler<Account>(Account.class),accountId);}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void saveAccount(Account account) {try{runner.update("insert into account(name,money)values(?,?)", account.getName(), account.getMoney());}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void updateAccount(Account account) {try{runner.update("update account set name=?,money=? where id=?", account.getName(), account.getMoney(), account.getId());}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void deleteAccount(Integer accountId) {try{runner.update("delete from account where id=?", accountId);}catch (Exception e) {throw new RuntimeException(e);}}
}
- IAccountService.java;
package com.itheima.service;import com.itheima.domain.Account;
import java.util.List;/*** 账户的业务层接口*/
public interface IAccountService {List<Account> findAllAccount();Account findAccountById(Integer accountId);void saveAccount(Account account);void updateAccount(Account account);void deleteAccount(Integer acccountId);
}
- AccountServiceImpl.java;
package com.itheima.service.impl;import com.itheima.dao.IAccountDao;
import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import java.util.List;/*** 账户的业务层实现类*/
public class AccountServiceImpl implements IAccountService{private IAccountDao accountDao;public void setAccountDao(IAccountDao accountDao) {this.accountDao = accountDao;}@Overridepublic List<Account> findAllAccount() {return accountDao.findAllAccount();}@Overridepublic Account findAccountById(Integer accountId) {return accountDao.findAccountById(accountId);}@Overridepublic void saveAccount(Account account) {accountDao.saveAccount(account);}@Overridepublic void updateAccount(Account account) {accountDao.updateAccount(account);}@Overridepublic void deleteAccount(Integer acccountId) {accountDao.deleteAccount(acccountId);}
}
- bean.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"><!-- 配置Service --><bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"><!-- 注入dao --><property name="accountDao" ref="accountDao"></property></bean><!--配置Dao对象--><bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl"><!-- 注入QueryRunner --><property name="runner" ref="runner"></property></bean><!--配置QueryRunner--><bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"><!--注入数据源--><constructor-arg name="ds" ref="dataSource"></constructor-arg></bean><!-- 配置数据源 --><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><!--连接数据库的必备信息--><property name="driverClass" value="com.mysql.jdbc.Driver"></property><property name="jdbcUrl" value="jdbc:mysql://localhost:3306/eesy"></property><property name="user" value="root"></property><property name="password" value="1234"></property></bean>
</beans>
- AccountServiceTest.java;
package com.itheima.test;import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.List;/*** 使用Junit单元测试:测试我们的配置*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:bean.xml")
public class AccountServiceTest {@Autowiredprivate IAccountService as;@Testpublic void testFindAll() {//3.执行方法List<Account> accounts = as.findAllAccount();for(Account account : accounts) {System.out.println(account);}}@Testpublic void testFindOne() {//3.执行方法Account account = as.findAccountById(1);System.out.println(account);}@Testpublic void testSave() {Account account = new Account();account.setName("test");account.setMoney(12345f);//3.执行方法as.saveAccount(account);}@Testpublic void testUpdate() {//3.执行方法Account account = as.findAccountById(4);account.setMoney(23456f);as.updateAccount(account);}@Testpublic void testDelete() {//3.执行方法as.deleteAccount(4);}
}
2.3 基于注解的IOC
- Account.java;
package com.itheima.domain;import java.io.Serializable;/*** 账户的实体类*/
public class Account implements Serializable {private Integer id;private String name;private Float money;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public Float getMoney() {return money;}public void setMoney(Float money) {this.money = money;}@Overridepublic String toString() {return "Account{" +"id=" + id +", name='" + name + ''' +", money=" + money +'}';}
}
- IAccountDao.java;
package com.itheima.dao;import com.itheima.domain.Account;
import java.util.List;/*** 账户的持久层接口*/
public interface IAccountDao {List<Account> findAllAccount();Account findAccountById(Integer accountId);void saveAccount(Account account);void updateAccount(Account account);void deleteAccount(Integer acccountId);
}
- AccountDaoImpl.java;
package com.itheima.dao.impl;import com.itheima.dao.IAccountDao;
import com.itheima.domain.Account;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.util.List;/*** 账户的持久层实现类*/
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {@Autowiredprivate QueryRunner runner;@Overridepublic List<Account> findAllAccount() {try{return runner.query("select * from account", new BeanListHandler<Account>(Account.class));}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic Account findAccountById(Integer accountId) {try{return runner.query("select * from account where id = ? ", new BeanHandler<Account>(Account.class), accountId);}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void saveAccount(Account account) {try{runner.update("insert into account(name,money)values(?,?)", account.getName(), account.getMoney());}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void updateAccount(Account account) {try{runner.update("update account set name=?,money=? where id=?", account.getName(), account.getMoney(), account.getId());}catch (Exception e) {throw new RuntimeException(e);}}@Overridepublic void deleteAccount(Integer accountId) {try{runner.update("delete from account where id=?", accountId);}catch (Exception e) {throw new RuntimeException(e);}}
}
- IAccountService.java;
package com.itheima.service;import com.itheima.domain.Account;
import java.util.List;/*** 账户的业务层接口*/
public interface IAccountService {List<Account> findAllAccount();Account findAccountById(Integer accountId);void saveAccount(Account account);void updateAccount(Account account);void deleteAccount(Integer acccountId);
}
- AccountServiceImpl.java;
package com.itheima.service.impl;import com.itheima.dao.IAccountDao;
import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;/*** 账户的业务层实现类*/
@Service("accountService")
public class AccountServiceImpl implements IAccountService {@Autowiredprivate IAccountDao accountDao;@Overridepublic List<Account> findAllAccount() {return accountDao.findAllAccount();}@Overridepublic Account findAccountById(Integer accountId) {return accountDao.findAccountById(accountId);}@Overridepublic void saveAccount(Account account) {accountDao.saveAccount(account);}@Overridepublic void updateAccount(Account account) {accountDao.updateAccount(account);}@Overridepublic void deleteAccount(Integer acccountId) {accountDao.deleteAccount(acccountId);}
}
- bean.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"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><!-- 告知spring在创建容器时要扫描的包 --><context:component-scan base-package="com.itheima"></context:component-scan><!--配置QueryRunner--><bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"><!--注入数据源--><constructor-arg name="ds" ref="dataSource"></constructor-arg></bean><!-- 配置数据源 --><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><!--连接数据库的必备信息--><property name="driverClass" value="com.mysql.jdbc.Driver"></property><property name="jdbcUrl" value="jdbc:mysql://localhost:3306/eesy"></property><property name="user" value="root"></property><property name="password" value="1234"></property></bean>
</beans>
- AccountServiceTest.java;
package com.itheima.test;import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;/*** 使用Junit单元测试:测试我们的配置*/
public class AccountServiceTest {@Testpublic void testFindAll() {//1.获取容器ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");//2.得到业务层对象IAccountService as = ac.getBean("accountService", IAccountService.class);//3.执行方法List<Account> accounts = as.findAllAccount();for(Account account : accounts){System.out.println(account);}}@Testpublic void testFindOne() {//1.获取容器ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");//2.得到业务层对象IAccountService as = ac.getBean("accountService", IAccountService.class);//3.执行方法Account account = as.findAccountById(1);System.out.println(account);}@Testpublic void testSave() {Account account = new Account();account.setName("test");account.setMoney(12345f);//1.获取容器ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");//2.得到业务层对象IAccountService as = ac.getBean("accountService", IAccountService.class);//3.执行方法as.saveAccount(account);}@Testpublic void testUpdate() {//1.获取容器ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");//2.得到业务层对象IAccountService as = ac.getBean("accountService", IAccountService.class);//3.执行方法Account account = as.findAccountById(4);account.setMoney(23456f);as.updateAccount(account);}@Testpublic void testDelete() {//1.获取容器ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");//2.得到业务层对象IAccountService as = ac.getBean("accountService", IAccountService.class);//3.执行方法as.deleteAccount(4);}
}