10-Spring6整合Junit5

十七、Spring6整合JUnit5

17.1 Spring对JUnit4的支持

准备工作:

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<?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.powernode</groupId>
<artifactId>spring6-015-junit</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<!--仓库-->
<repositories>
<!--spring里程碑版本的仓库-->
<repository>
<id>repository.spring.milestone</id>
<name>Spring Milestone Repository</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>

<dependencies>
<!--spring context依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>6.0.0-M2</version>
</dependency>
<!--spring对junit的支持相关依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>6.0.0-M2</version>
</dependency>
<!--junit4依赖-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
</dependencies>

<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>

</project>
package com.powernode.spring6.bean;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

/**
* @author 动力节点
* @version 1.0
* @className User
* @since 1.0
**/
@Component
public class User {

@Value("张三")
private String name;

@Override
public String toString() {
return "User{" +
"name='" + name + '\'' +
'}';
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public User() {
}

public User(String name) {
this.name = name;
}
}
<?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">
<context:component-scan base-package="com.powernode.spring6.bean"/>
</beans>

单元测试:

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package com.powernode.spring6.test;

import com.powernode.spring6.bean.User;
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;

/**
* @author 动力节点
* @version 1.0
* @className SpringJUnit4Test
* @since 1.0
**/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring.xml")
public class SpringJUnit4Test {

@Autowired
private User user;

@Test
public void testUser(){
System.out.println(user.getName());
}
}

执行结果如下:

img

Spring提供的方便主要是这几个注解:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(“classpath:spring.xml”)

在单元测试类上使用这两个注解之后,在单元测试类中的属性上可以使用@Autowired。比较方便。

17.2 Spring对JUnit5的支持

引入JUnit5的依赖,Spring对JUnit支持的依赖还是:spring-test,如下:

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<?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.powernode</groupId>
<artifactId>spring6-015-junit</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<!--仓库-->
<repositories>
<!--spring里程碑版本的仓库-->
<repository>
<id>repository.spring.milestone</id>
<name>Spring Milestone Repository</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>

<dependencies>
<!--spring context依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>6.0.0-M2</version>
</dependency>
<!--spring对junit的支持相关依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>6.0.0-M2</version>
</dependency>
<!--junit5依赖-->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.9.0</version>
<scope>test</scope>
</dependency>
</dependencies>

<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>

</project>
package com.powernode.spring6.test;

import com.powernode.spring6.bean.User;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringExtension;


@ExtendWith(SpringExtension.class)
@ContextConfiguration("classpath:spring.xml")
public class SpringJUnit5Test {

@Autowired
private User user;

@Test
public void testUser(){
System.out.println(user.getName());
}
}

在JUnit5当中,可以使用Spring提供的以下两个注解,标注到单元测试类上,这样在类当中就可以使用@Autowired注解了。

@ExtendWith(SpringExtension.class)

@ContextConfiguration(“classpath:spring.xml”)

十八、Spring6集成MyBatis3.5

18.1 实现步骤

  • 第一步:准备数据库表

    • 使用t_act表(账户表)
  • 第二步:IDEA中创建一个模块,并引入依赖

    • spring-context
    • spring-jdbc
    • mysql驱动
    • mybatis
    • mybatis-spring:mybatis提供的与spring框架集成的依赖
    • 德鲁伊连接池
    • junit
  • 第三步:基于三层架构实现,所以提前创建好所有的包

    • com.powernode.bank.mapper
    • com.powernode.bank.service
    • com.powernode.bank.service.impl
    • com.powernode.bank.pojo
  • 第四步:编写pojo

    • Account,属性私有化,提供公开的setter getter和toString。
  • 第五步:编写mapper接口

    • AccountMapper接口,定义方法
  • 第六步:编写mapper配置文件

    • 在配置文件中配置命名空间,以及每一个方法对应的sql。
  • 第七步:编写service接口和service接口实现类

    • AccountService
    • AccountServiceImpl
  • 第八步:编写jdbc.properties配置文件

    • 数据库连接池相关信息
  • 第九步:编写mybatis-config.xml配置文件

    • 该文件可以没有,大部分的配置可以转移到spring配置文件中。
    • 如果遇到mybatis相关的系统级配置,还是需要这个文件。
  • 第十步:编写spring.xml配置文件

    • 组件扫描
    • 引入外部的属性文件
    • 数据源
    • SqlSessionFactoryBean配置
      • 注入mybatis核心配置文件路径
      • 指定别名包
      • 注入数据源
    • Mapper扫描配置器
      • 指定扫描的包
    • 事务管理器DataSourceTransactionManager
      • 注入数据源
    • 启用事务注解
      • 注入事务管理器
  • 第十一步:编写测试程序,并添加事务,进行测试

18.2 具体实现

  • 第一步:准备数据库表

连接数据库的工具有很多,除了之前我们使用的navicat for mysql之外,也可以使用IDEA工具自带的DataBase插件。可以根据下图提示自行配置:

img

img

  • 第二步:IDEA中创建一个模块,并引入依赖
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<?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.powernode</groupId>
<artifactId>spring6-016-sm</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<!--仓库-->
<repositories>
<!--spring里程碑版本的仓库-->
<repository>
<id>repository.spring.milestone</id>
<name>Spring Milestone Repository</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>

<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>6.0.0-M2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>6.0.0-M2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.30</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.11</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.2.13</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
</dependencies>

<properties>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
</properties>

</project>
  • 第三步:基于三层架构实现,所以提前创建好所有的包

img

  • 第四步:编写pojo
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package com.powernode.bank.pojo;

/**
* @author 动力节点
* @version 1.0
* @className Account
* @since 1.0
**/
public class Account {
private String actno;
private Double balance;

@Override
public String toString() {
return "Account{" +
"actno='" + actno + '\'' +
", balance=" + balance +
'}';
}

public Account() {
}

public Account(String actno, Double balance) {
this.actno = actno;
this.balance = balance;
}

public String getActno() {
return actno;
}

public void setActno(String actno) {
this.actno = actno;
}

public Double getBalance() {
return balance;
}

public void setBalance(Double balance) {
this.balance = balance;
}
}
  • 第五步:编写mapper接口
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package com.powernode.bank.mapper;

import com.powernode.bank.pojo.Account;

import java.util.List;

/**
* @author 动力节点
* @version 1.0
* @className AccountMapper
* @since 1.0
**/
public interface AccountMapper {

/**
* 保存账户
* @param account
* @return
*/
int insert(Account account);

/**
* 根据账号删除账户
* @param actno
* @return
*/
int deleteByActno(String actno);

/**
* 修改账户
* @param account
* @return
*/
int update(Account account);

/**
* 根据账号查询账户
* @param actno
* @return
*/
Account selectByActno(String actno);

/**
* 获取所有账户
* @return
*/
List<Account> selectAll();
}
  • 第六步:编写mapper配置文件

一定要注意,按照下图提示创建这个目录。注意是斜杠不是点儿。在resources目录下新建。并且要和Mapper接口包对应上。

img

如果接口叫做AccountMapper,配置文件必须是AccountMapper.xml

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<?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.powernode.bank.mapper.AccountMapper">
<insert id="insert">
insert into t_act values(#{actno}, #{balance})
</insert>
<delete id="deleteByActno">
delete from t_act where actno = #{actno}
</delete>
<update id="update">
update t_act set balance = #{balance} where actno = #{actno}
</update>
<select id="selectByActno" resultType="Account">
select * from t_act where actno = #{actno}
</select>
<select id="selectAll" resultType="Account">
select * from t_act
</select>
</mapper>
  • 第七步:编写service接口和service接口实现类

注意编写的service实现类纳入IoC容器管理:

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package com.powernode.bank.service;

import com.powernode.bank.pojo.Account;

import java.util.List;

/**
* @author 动力节点
* @version 1.0
* @className AccountService
* @since 1.0
**/
public interface AccountService {
/**
* 开户
* @param act
* @return
*/
int save(Account act);

/**
* 根据账号销户
* @param actno
* @return
*/
int deleteByActno(String actno);

/**
* 修改账户
* @param act
* @return
*/
int update(Account act);

/**
* 根据账号获取账户
* @param actno
* @return
*/
Account getByActno(String actno);

/**
* 获取所有账户
* @return
*/
List<Account> getAll();

/**
* 转账
* @param fromActno
* @param toActno
* @param money
*/
void transfer(String fromActno, String toActno, double money);
}
package com.powernode.bank.service.impl;

import com.powernode.bank.mapper.AccountMapper;
import com.powernode.bank.pojo.Account;
import com.powernode.bank.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
* @author 动力节点
* @version 1.0
* @className AccountServiceImpl
* @since 1.0
**/
@Transactional
@Service("accountService")
public class AccountServiceImpl implements AccountService {

@Autowired
private AccountMapper accountMapper;

@Override
public int save(Account act) {
return accountMapper.insert(act);
}

@Override
public int deleteByActno(String actno) {
return accountMapper.deleteByActno(actno);
}

@Override
public int update(Account act) {
return accountMapper.update(act);
}

@Override
public Account getByActno(String actno) {
return accountMapper.selectByActno(actno);
}

@Override
public List<Account> getAll() {
return accountMapper.selectAll();
}

@Override
public void transfer(String fromActno, String toActno, double money) {
Account fromAct = accountMapper.selectByActno(fromActno);
if (fromAct.getBalance() < money) {
throw new RuntimeException("余额不足");
}
Account toAct = accountMapper.selectByActno(toActno);
fromAct.setBalance(fromAct.getBalance() - money);
toAct.setBalance(toAct.getBalance() + money);
int count = accountMapper.update(fromAct);
count += accountMapper.update(toAct);
if (count != 2) {
throw new RuntimeException("转账失败");
}
}
}
  • 第八步:编写jdbc.properties配置文件

放在类的根路径下

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jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring6
jdbc.username=root
jdbc.password=root
  • 第九步:编写mybatis-config.xml配置文件

放在类的根路径下,只开启日志,其他配置到spring.xml中。

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<?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>
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
</configuration>
  • 第十步:编写spring.xml配置文件

注意:当你在spring.xml文件中直接写标签内容时,IDEA会自动给你添加命名空间

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<?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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<!--组件扫描-->
<context:component-scan base-package="com.powernode.bank"/>

<!--外部属性配置文件-->
<context:property-placeholder location="jdbc.properties"/>

<!--数据源-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>

<!--SqlSessionFactoryBean-->
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<!--mybatis核心配置文件路径-->
<property name="configLocation" value="mybatis-config.xml"/>
<!--注入数据源-->
<property name="dataSource" ref="dataSource"/>
<!--起别名-->
<property name="typeAliasesPackage" value="com.powernode.bank.pojo"/>
</bean>

<!--Mapper扫描器-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.powernode.bank.mapper"/>
</bean>

<!--事务管理器-->
<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"/>

</beans>
  • 第十一步:编写测试程序,并添加事务,进行测试
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package com.powernode.spring6.test;

import com.powernode.bank.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
* @author 动力节点
* @version 1.0
* @className SMTest
* @since 1.0
**/
public class SMTest {

@Test
public void testSM(){
ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring.xml");
AccountService accountService = applicationContext.getBean("accountService", AccountService.class);
try {
accountService.transfer("act-001", "act-002", 10000.0);
System.out.println("转账成功");
} catch (Exception e) {
e.printStackTrace();
System.out.println("转账失败");
}
}

}

最后大家别忘了测试事务!!!!

18.3 Spring配置文件的import

spring配置文件有多个,并且可以在spring的核心配置文件中使用import进行引入,我们可以将组件扫描单独定义到一个配置文件中,如下:

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<?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 https://www.springframework.org/schema/context/spring-context.xsd">

<!--组件扫描-->
<context:component-scan base-package="com.powernode.bank"/>

</beans>

然后在核心配置文件中引入:

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<?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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<!--引入其他的spring配置文件-->
<import resource="common.xml"/>

</beans>

注意:在实际开发中,service单独配置到一个文件中,dao单独配置到一个文件中,然后在核心配置文件中引入,养成好习惯。