1.基于注解的IOC配置
1.1导入jar包
<?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>day02_eesy_01anno_ioc</artifactId> <version>1.0-SNAPSHOT</version> <packaging>jar</packaging> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>5.0.2.RELEASE</version> </dependency> </dependencies> </project>
1.2接口
package com.itheima.dao; /** * 账户的持久层接口 */ public interface IAccountDao { /** * 模拟保存账户 */ void saveAccount(); }
package com.itheima.service; /** * 账户业务层的接口 */ public interface IAccountService { /** * 模拟保存账户 */ void saveAccount(); }
1.3创建spring的xml配置文件并开启对注解的支持
<?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"> <!--把对象的创建交给spring来管理--> <!--<bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl"></bean>--> <!--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>
1.4使用@Component注解配置管理的资源
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.context.annotation.Scope; import org.springframework.stereotype.Component; import org.springframework.stereotype.Service; 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> * * 1.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 * * 2.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:首先按照类型筛选,然后按照名称筛选 * 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 * 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} * * 3.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 * * 4.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-method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("accountDao2") @Resource(name = "accountDao1") private IAccountDao accountDao ; public void saveAccount(){ accountDao.saveAccount(); } }
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1111111111"); } }
1.5测试方法
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 { 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"); IAccountService as2 = (IAccountService)ac.getBean("accountService"); System.out.println(as==as2); // IAccountDao adao = ac.getBean("accountDao", IAccountDao.class); // System.out.println(adao); // System.out.println(as); as.saveAccount(); } }
2.常用注解
2.1用于创建对象的
相当于:<bean id="" class="">
1.@Component
2.@Controller @Service @Repository
2.2用于注入数据的
相当于:<property name="" ref=""> <property name="" value="">
1. @Autowired
2.@Qualifier
3.@Resource
4.@Value
2.3用于改变作用范围的
相当于:<bean id="" class="" scope="">
1.@Scope
2.4和生命周期相关的
相当于:<bean id="" class="" init-method="" destroy-method="" />
1.@PostConstruct
2.@PreDestroy
3.使用spring的IoC的实现账户的CURD
3.1 技术要求
使用 spring 的 IoC 实现对象的管理
使用 DBAssit 作为持久层解决方案
使用 c3p0 数据源
3.2导入jar包
<?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>day02_eesy_02account_xmlioc</artifactId> <version>1.0-SNAPSHOT</version> <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>
3.3编写实体
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; } @Override public String toString() { return "Account{" + "id=" + id + ", name='" + name + '\'' + ", money=" + money + '}'; } }
3.4编写持久层代码
package com.itheima.dao; import com.itheima.domain.Account; import java.util.List; /** * 账户的持久层接口 */ public interface IAccountDao { /** * 查询所有 * @return */ List<Account> findAllAccount(); /** * 查询一个 * @return */ Account findAccountById(Integer accountId); /** * 保存 * @param account */ void saveAccount(Account account); /** * 更新 * @param account */ void updateAccount(Account account); /** * 删除 * @param acccountId */ void deleteAccount(Integer acccountId); }
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); } } }
3.5编写业务层代码
package com.itheima.service; import com.itheima.domain.Account; import java.util.List; /** * 账户的业务层接口 */ public interface IAccountService { /** * 查询所有 * @return */ List<Account> findAllAccount(); /** * 查询一个 * @return */ Account findAccountById(Integer accountId); /** * 保存 * @param account */ void saveAccount(Account account); /** * 更新 * @param account */ void updateAccount(Account account); /** * 删除 * @param acccountId */ void deleteAccount(Integer acccountId); }
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); } }
3.6创建并编写配置文件
<?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="123456"></property> </bean> </beans>
3.7测试
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 { @Test public 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); } } @Test public 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); } @Test public 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); } @Test public 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); } @Test public 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); } }
4.使用注解完成上述案例
4.1导入jar包
<?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>day02_eesy_04account_annoioc_withoutxml</artifactId> <version>1.0-SNAPSHOT</version> <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>
4.2实体类
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; } @Override public String toString() { return "Account{" + "id=" + id + ", name='" + name + '\'' + ", money=" + money + '}'; } }
4.3持久层代码
package com.itheima.dao; import com.itheima.domain.Account; import java.util.List; /** * 账户的持久层接口 */ public interface IAccountDao { /** * 查询所有 * @return */ List<Account> findAllAccount(); /** * 查询一个 * @return */ Account findAccountById(Integer accountId); /** * 保存 * @param account */ void saveAccount(Account account); /** * 更新 * @param account */ void updateAccount(Account account); /** * 删除 * @param acccountId */ void deleteAccount(Integer acccountId); }
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); } } }
4.4业务层代码
package com.itheima.service; import com.itheima.domain.Account; import java.util.List; /** * 账户的业务层接口 */ public interface IAccountService { /** * 查询所有 * @return */ List<Account> findAllAccount(); /** * 查询一个 * @return */ Account findAccountById(Integer accountId); /** * 保存 * @param account */ void saveAccount(Account account); /** * 更新 * @param account */ void updateAccount(Account account); /** * 删除 * @param acccountId */ void deleteAccount(Integer acccountId); }
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); } }
4.5主配置类
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 */ @ComponentScan(basePackages = {"com.itheima"}) @Import(JdbcConfig.class) @PropertySource("classpath:jdbcConfig.properties") public class SpringConfiguraiton { }
4.6数据库连接配置类
package config; import com.mchange.v2.c3p0.ComboPooledDataSource; import org.apache.commons.dbutils.QueryRunner; import org.springframework.beans.factory.annotation.Value; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Scope; import javax.sql.DataSource; 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; @Bean(name = "runner") @Scope("prototype") public QueryRunner createQueryRunner(DataSource dataSource) { return new QueryRunner(dataSource); } @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); } } }
4.7数据库配置文件
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/eesy jdbc.username=root jdbc.password=123456
4.8测试类
package com.itheima.test; import config.SpringConfiguraiton; import com.itheima.domain.Account; import com.itheima.service.IAccountService; import org.junit.Before; 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 { private ApplicationContext ac; private IAccountService as; @Before public void init() { //1.获取容易 ac = new AnnotationConfigApplicationContext(SpringConfiguraiton.class); //2.得到业务层对象 as = ac.getBean("accountService", IAccountService.class); } @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() { //1.获取容易 // ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml"); ApplicationContext ac = new AnnotationConfigApplicationContext(SpringConfiguraiton.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 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); } @Test public void testUpdate() { //1.获取容易 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); } @Test public void testDelete() { //1.获取容易 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); } }
5.新注解说明
5.1@Configuration
5.2@ComponentScan
5.3@Bean
5.4@PropertySource
5.5@Import
6.spring整合junit案例
6.1问题
6.2解决思路分析
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
6.3使用@RunWith注解替换原有运行器
6.4使用@ContextConfiguration 指定spring 配置文件/对象的位置
6.5使用@Autowired给测试类中的变量注入数据
6.6测试类
package com.itheima.test; import config.SpringConfiguration; 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.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 * 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; @Test public void testFindAll() { //3.执行方法 List<Account> accounts = as.findAllAccount(); for (Account account : accounts) { System.out.println(account); } } }