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
1、spring中ioc的常用注解
目录结构
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/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">
<!--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>
AccountServiceImpl
package com.itheima.service.impl;
import com.itheima.dao.IAccountDao;
import com.itheima.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
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;
@PostConstruct
public void init(){
System.out.println("初始化方法执行了");
}
@PreDestroy
public void destroy(){
System.out.println("销毁方法执行了");
}
public void saveAccount(){
accountDao.saveAccount();
}
}
client
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 {
/**
* @param args
*/
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");
// IAccountService as2 = (IAccountService)ac.getBean("accountService");
// System.out.println(as);
// IAccountDao adao = ac.getBean("accountDao",IAccountDao.class);
// System.out.println(adao);
// System.out.println(as == as2);
as.saveAccount();
ac.close();
}
}
== 注意这里出现了三个问题
就是用注解配置的时候 三个注解失效了 并未执行 但是查资料并不知道原因
Resource
作用:直接按照bean的id注入。它可以独立使用
PreDestroy
作用:用于指定销毁方法
PostConstruct
作用:用于指定初始化方法
后面有机会要解决这个问题!!!!!!!!!!!!!!!!!!
基于xml的CRUD的IOC案例
目录结构
AccountServiceImpl
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;
}
@Override
public List<Account> findAllAccount() {
return accountDao.findAllAccount();
}
@Override
public Account findAccountById(Integer accountId) {
return accountDao.findAccountById(accountId);
}
@Override
public void saveAccount(Account account) {
accountDao.saveAccount(account);
}
@Override
public void updateAccount(Account account) {
accountDao.updateAccount(account);
}
@Override
public void deleteAccount(Integer acccountId) {
accountDao.deleteAccount(acccountId);
}
}
AccountDaoImpl
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;
}
@Override
public List<Account> findAllAccount() {
try{
return runner.query("select * from account",new BeanListHandler<Account>(Account.class));
}catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public 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);
}
}
@Override
public void saveAccount(Account account) {
try{
runner.update("insert into account(name,money)values(?,?)",account.getName(),account.getMoney());
}catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public 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);
}
}
@Override
public void deleteAccount(Integer accountId) {
try{
runner.update("delete from account where id=?",accountId);
}catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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/beans
http://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="root"></property>
</bean>
</beans>
测试类test
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.context.support.ClassPathXmlApplicationContext;
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
*/
public class AccountServiceTest {
@Test
public void testFindAll() {
//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");
//3.执行方法
List<Account> accounts = as.findAllAccount();
for(Account account : accounts){
System.out.println(account);
}
}
@Test
public void testFindOne() {
ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//2.根据id获取Bean对象
IAccountService as = (IAccountService)ac.getBean("accountService");
//3.执行方法
Account account = as.findAccountById(1);
System.out.println(account);
}
@Test
public void testSave() {
ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//2.根据id获取Bean对象
IAccountService as = (IAccountService)ac.getBean("accountService");
Account account = new Account();
account.setName("test");
account.setMoney(12345f);
//3.执行方法
as.saveAccount(account);
}
@Test
public void testUpdate() {
ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//2.根据id获取Bean对象
IAccountService as = (IAccountService)ac.getBean("accountService");
//3.执行方法
Account account = as.findAccountById(4);
account.setMoney(23456f);
as.updateAccount(account);
}
@Test
public void testDelete() {
ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//2.根据id获取Bean对象
IAccountService as = (IAccountService)ac.getBean("accountService");
//3.执行方法
as.deleteAccount(4);
}
}
注意点:当用xml方式进行set方式的注入时,必须有set方法 。
基于注解配置的CRUD的IOC案例
目录结构
AccountServiceImpl
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{
@Autowired
private IAccountDao accountDao;
@Override
public List<Account> findAllAccount() {
return accountDao.findAllAccount();
}
@Override
public Account findAccountById(Integer accountId) {
return accountDao.findAccountById(accountId);
}
@Override
public void saveAccount(Account account) {
accountDao.saveAccount(account);
}
@Override
public void updateAccount(Account account) {
accountDao.updateAccount(account);
}
@Override
public void deleteAccount(Integer acccountId) {
accountDao.deleteAccount(acccountId);
}
}
AccountDaoImpl
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 {
@Autowired
private QueryRunner runner;
@Override
public List<Account> findAllAccount() {
try{
return runner.query("select * from account",new BeanListHandler<Account>(Account.class));
}catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public 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);
}
}
@Override
public void saveAccount(Account account) {
try{
runner.update("insert into account(name,money)values(?,?)",account.getName(),account.getMoney());
}catch (Exception e) {
throw new RuntimeException(e);
}
}
@Override
public 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);
}
}
@Override
public void deleteAccount(Integer accountId) {
try{
runner.update("delete from account where id=?",accountId);
}catch (Exception e) {
throw new RuntimeException(e);
}
}
}
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/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">
<!-- 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="root"></property>
</bean>
</beans>
基于纯注解配置的CRUD的IOC案例
目录结构
SpringConfiguration
package config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;
/**
* 该类是一个配置类,它的作用和bean.xml是一样的
* spring中的新注解
* Configuration
* 作用:指定当前类是一个配置类
* 细节:当配置类作为AnnotationConfigApplicationContext对象创建的参数时,该注解可以不写。
* ComponentScan
* 作用:用于通过注解指定spring在创建容器时要扫描的包
* 属性:
* value:它和basePackages的作用是一样的,都是用于指定创建容器时要扫描的包。
* 我们使用此注解就等同于在xml中配置了:
* <context:component-scan base-package="com.itheima"></context:component-scan>
* Bean
* 作用:用于把当前方法的返回值作为bean对象存入spring的ioc容器中
* 属性:
* name:用于指定bean的id。当不写时,默认值是当前方法的名称
* 细节:
* 当我们使用注解配置方法时,如果方法有参数,spring框架会去容器中查找有没有可用的bean对象。
* 查找的方式和Autowired注解的作用是一样的
* Import
* 作用:用于导入其他的配置类
* 属性:
* value:用于指定其他配置类的字节码。
* 当我们使用Import的注解之后,有Import注解的类就父配置类,而导入的都是子配置类
* PropertySource
* 作用:用于指定properties文件的位置
* 属性:
* value:指定文件的名称和路径。
* 关键字:classpath,表示类路径下
*/
//@Configuration
@ComponentScan("com.itheima")
@Import(JdbcConfig.class)
@PropertySource("classpath:jdbcConfig.properties")
public class SpringConfiguration {
}
JdbcConfig
package config;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.apache.commons.dbutils.QueryRunner;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Scope;
import javax.sql.DataSource;
/**
* 和spring连接数据库相关的配置类
*/
public class JdbcConfig {
@Value("${jdbc.driver}")
private String driver;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
/**
* 用于创建一个QueryRunner对象
* @param dataSource
* @return
*/
@Bean(name="runner")
@Scope("prototype")
public QueryRunner createQueryRunner( DataSource dataSource){
return new QueryRunner(dataSource);
}
/**
* 创建数据源对象
* @return
*/
@Bean(name="dataSource")
public DataSource createDataSource(){
try {
ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setDriverClass(driver);
ds.setJdbcUrl(url);
ds.setUser(username);
ds.setPassword(password);
return ds;
}catch (Exception e){
throw new RuntimeException(e);
}
}
}
jdbcConfig.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/eesy
jdbc.username=root
jdbc.password=root
AccountServiceTest
package com.itheima.test;
import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import config.SpringConfiguration;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
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 {
@Test
public void testFindAll() {
//1.获取容易
//ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//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);
}
}
@Test
public void testFindOne() {
//1.获取容易
ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//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);
}
@Test
public void testSave() {
Account account = new Account();
account.setName("test");
account.setMoney(12345f);
//1.获取容易
ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//2.得到业务层对象
IAccountService as = ac.getBean("accountService",IAccountService.class);
//3.执行方法
as.saveAccount(account);
}
@Test
public void testUpdate() {
//1.获取容易
ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//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);
}
@Test
public void testDelete() {
//1.获取容易
ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//2.得到业务层对象
IAccountService as = ac.getBean("accountService",IAccountService.class);
//3.执行方法
as.deleteAccount(4);
}
}
QueryRunnerTest
package com.itheima.test;
import config.SpringConfiguration;
import org.apache.commons.dbutils.QueryRunner;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
/**
* 测试queryrunner是否单例
*/
public class QueryRunnerTest {
@Test
public void testQueryRunner(){
//1.获取容易
ApplicationContext ac = new AnnotationConfigApplicationContext(SpringConfiguration.class);
//2.获取queryRunner对象
QueryRunner runner = ac.getBean("runner",QueryRunner.class);
QueryRunner runner1 = ac.getBean("runner",QueryRunner.class);
System.out.println(runner == runner1);
}
}
关于技术技术选型的问题,当时我们自己写的时,用注解的方式较为简单,当时引用的类时,用xml的方式更为简单,这两种相结合的方法是最为有效简单的。
@Qualifier的注解的另一种用法(在方法参数中 ),其原理与前面所讲的@Autowriedde组合用法的原理类似,参照前面的讲解去理解。
package config;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.apache.commons.dbutils.QueryRunner;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Scope;
import javax.sql.DataSource;
/**
* 和spring连接数据库相关的配置类
*/
public class JdbcConfig {
@Value("${jdbc.driver}")
private String driver;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
/**
* 用于创建一个QueryRunner对象
* @param dataSource
* @return
*/
@Bean(name="runner")
@Scope("prototype")
public QueryRunner createQueryRunner(@Qualifier("ds2") DataSource dataSource){
return new QueryRunner(dataSource);
}
/**
* 创建数据源对象
* @return
*/
@Bean(name="ds2")
public DataSource createDataSource(){
try {
ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setDriverClass(driver);
ds.setJdbcUrl(url);
ds.setUser(username);
ds.setPassword(password);
return ds;
}catch (Exception e){
throw new RuntimeException(e);
}
}
@Bean(name="ds1")
public DataSource createDataSource1(){
try {
ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setDriverClass(driver);
ds.setJdbcUrl("jdbc:mysql://localhost:3306/eesy02");
ds.setUser(username);
ds.setPassword(password);
return ds;
}catch (Exception e){
throw new RuntimeException(e);
}
}
}
spring整合junit
1、应用程序的入口
main方法
2、junit单元测试中,没有main方法也能执行
junit集成了一个main方法
该方法就会判断当前测试类中哪些方法有 @Test注解
junit就让有Test注解的方法执行
3、junit不会管我们是否采用spring框架
在执行测试方法时,junit根本不知道我们是不是使用了spring框架
所以也就不会为我们读取配置文件/配置类创建spring核心容器
4、由以上三点可知
当测试方法执行时,没有Ioc容器,就算写了Autowired注解,也无法实现注入
具体实现看测试类代码 :
package com.itheima.test;
import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import config.SpringConfiguration;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
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
*/
/**
* 使用Junit单元测试:测试我们的配置
* Spring整合junit的配置
* 1、导入spring整合junit的jar(坐标)
* 2、使用Junit提供的一个注解把原有的main方法替换了,替换成spring提供的
* @Runwith
* 3、告知spring的运行器,spring和ioc创建是基于xml还是注解的,并且说明位置
* @ContextConfiguration
* locations:指定xml文件的位置,加上classpath关键字,表示在类路径下
* classes:指定注解类所在地位置
*
* 当我们使用spring 5.x版本的时候,要求junit的jar必须是4.12及以上
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfiguration.class)
public class AccountServiceTest {
@Autowired
private IAccountService as = null;
@Test
public void testFindAll() {
//1.获取容易
//ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//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);
}
}
@Test
public void testFindOne() {
//1.获取容易
//countService as = ac.getBean("accountService",IAccountService.class);
//3.执行方法
Account account = as.findAccountById(1);
System.out.println(account);
}
@Test
public void testSave() {
Account account = new Account();
account.setName("test");
account.setMoney(12345f);
//1.获取容易
// ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//2.得到业务层对象
//IAccountService as = ac.getBean("accountService",IAccountService.class);
//3.执行方法
as.saveAccount(account);
}
@Test
public void testUpdate() {
//1.获取容易
// //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);
}
@Test
public void testDelete() {
//1.获取容易
// ApplicationContext ac=new AnnotationConfigApplicationContext(SpringConfiguration.class);
//2.得到业务层对象
//IAccountService as = ac.getBean("accountService",IAccountService.class);
//3.执行方法
as.deleteAccount(4);
}
}
pom.xml坐标
<?xml version="1.0" encoding="UTF-8"?>
<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.itheima</groupId>
<artifactId>springDay02_annotionwithoutXML</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
</dependencies>
</project>
对使用xml的方式ioc测试类的改造
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 {
@Autowired
private IAccountService as;
@Test
public void testFindAll() {
//3.执行方法
List<Account> accounts = as.findAllAccount();
for(Account account : accounts){
System.out.println(account);
}
}
@Test
public void testFindOne() {
//3.执行方法
Account account = as.findAccountById(1);
System.out.println(account);
}
@Test
public void testSave() {
Account account = new Account();
account.setName("test");
account.setMoney(12345f);
//3.执行方法
as.saveAccount(account);
}
@Test
public void testUpdate() {
//3.执行方法
Account account = as.findAccountById(4);
account.setMoney(23456f);
as.updateAccount(account);
}
@Test
public void testDelete() {
//3.执行方法
as.deleteAccount(4);
}
}