spring（二）：IOC配置深入与注解实现

文章目录

• • 一、IoC的CRUD
  • • 1.1 导入坐标
    • 1.2 创建数据库和实体类
    • 1.3 持久层接口和实现类
    • 1.4 业务层接口和实现类
    • 1.5 配置文件
    • 1.6 测试类
  • 二、常用注解
  • • 1.1 创建bean的注解
    • 1.2 注入数据的注解
    • 1.3 用于改变作用范围的注解
    • 1.4 生命周期相关
  • 三、注解的简单案例
  • • 3.1 持久层接口和实现类
    • 3.2 业务层接口和实现类
    • 3.3 xml开启扫描
    • 3.4 测试类
  • 四、配置类注解
  • 五、实现纯注解IoC实现
  • • 5.1 导入坐标
    • 5.2 创建数据库和实体类
    • 5.3 持久层接口和实现类
    • 5.4 业务层接口和实现类
    • 5.5 创建主注解配置类
    • 5.6 创建数据库配置文件
    • 5.7 创建数据库注解配置子类
    • 5.8 测试类

一、IoC的CRUD

项目结构：

1.1 导入坐标

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.2.8.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>8.0.20</version>
    </dependency>
    <dependency>
        <groupId>c3p0</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.1.2</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13</version>
        <scope>test</scope>
    </dependency>
</dependencies>

1.2 创建数据库和实体类

数据库：

create table account(
	id int primary key auto_increment,
	name varchar(40),
	money float
)character set utf8 collate utf8_general_ci;

insert into account(name,money) values('aaa',1000);
insert into account(name,money) values('bbb',1000);
insert into account(name,money) values('ccc',1000);

实体类：

package domain;

import java.io.Serializable;

/**
 * @author konley
 * @date 2020-08-17 12:54
 * 账户的实体类
 */
public class Account implements Serializable {
    private Integer id;
    private String name;
    private float money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + 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;
    }
}

1.3 持久层接口和实现类

package dao;

import domain.Account;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 13:01
 * 账户的持久层接口
 */
public interface IAccountDao {
    /**
     * description: 查询所有
     * @return java.util.List<domain.Account>
     */
    List<Account> findAll() throws SQLException;

    /**
     * description: 查询一个
     * @param id
     * @return domain.Account
     */
    Account findAccountById(Integer id) throws SQLException;

    /**
     * description: 保存
     * @param account
     * @return void
     */
    void saveAccount(Account account) throws SQLException;

    /**
     * description: 更新
     * @param account
     * @return void
     */
    void updateAccount(Account account) throws SQLException;

    /**
     * description: 删除
     * @param id
     * @return void
     */
    void deleteAccount(Integer id) throws SQLException;
}

package dao.impl;

import dao.IAccountDao;
import domain.Account;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 13:03
 */
public class AccountDaoImpl implements IAccountDao {
    private QueryRunner runner;

    public void setRunner(QueryRunner runner) {
        this.runner = runner;
    }

    @Override
    public List<Account> findAll() throws SQLException {
        return runner.query("select * from account",new BeanListHandler<Account>(Account.class));
    }

    @Override
    public Account findAccountById(Integer id) throws SQLException {
        return runner.query("select * from account where id = ?",new BeanHandler<Account>(Account.class),id);
    }

    @Override
    public void saveAccount(Account account) throws SQLException {
        runner.update("insert into account(name,money) value(?,?) ",account.getName(),account.getMoney());
    }

    @Override
    public void updateAccount(Account account) throws SQLException {
        runner.update("update account set name = ?,money = ? where id = ? ",account.getName(),account.getMoney(),account.getId());
    }

    @Override
    public void deleteAccount(Integer id) throws SQLException {
        runner.update("delete from account where id = ? ",id);
    }
}

1.4 业务层接口和实现类

package service;

import domain.Account;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 12:54
 * 账户的业务层接口
 */
public interface IAccountService {
    /**
     * description: 查询所有
     * @return java.util.List<domain.Account>
     */
    List<Account> findAll() throws SQLException;

    /**
     * description: 查询一个
     * @param id
     * @return domain.Account
     */
    Account findAccountById(Integer id) throws SQLException;

    /**
     * description: 保存
     * @param account
     * @return void
     */
    void saveAccount(Account account) throws SQLException;

    /**
     * description: 更新
     * @param account
     * @return void
     */
    void updateAccount(Account account) throws SQLException;

    /**
     * description: 删除
     * @param id
     * @return void
     */
    void deleteAccount(Integer id) throws SQLException;
}

package service.impl;

import dao.IAccountDao;
import domain.Account;
import service.IAccountService;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 12:59
 * 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> findAll() throws SQLException {
        return accountDao.findAll();
    }

    @Override
    public Account findAccountById(Integer id) throws SQLException {
        return accountDao.findAccountById(id);
    }

    @Override
    public void saveAccount(Account account) throws SQLException {
        accountDao.saveAccount(account);
    }

    @Override
    public void updateAccount(Account account) throws SQLException {
        accountDao.updateAccount(account);
    }

    @Override
    public void deleteAccount(Integer id) throws SQLException {
        accountDao.deleteAccount(id);
    }
}

1.5 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">

    <!--配置数据源-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!--连接数据库的信息-->
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring?useUnicode=true&amp;
        characterEncoding=UTF-8&amp;useSSL=false&amp;serverTimezone = GMT"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123456"></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dao-->
    <bean id="accountDao" class="dao.impl.AccountDaoImpl">
        <!--注入QueryRunner-->
        <property name="runner" ref="runner"></property>
    </bean>

    <!--配置service-->
    <bean id="accountService" class="service.impl.AccountServiceImpl">
        <!--注入dao-->
        <property name="accountDao" ref="accountDao"></property>
    </bean>
</beans>

1.6 测试类

import dao.IAccountDao;
import domain.Account;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 13:21
 * 测试xml配置
 */
public class AccountServiceTest {
    private ApplicationContext app;
    private IAccountDao dao;

    @Before
    public void getDao(){
        app = new ClassPathXmlApplicationContext("beans.xml");
        dao = app.getBean("accountDao", IAccountDao.class);
    }

    @Test
    public void findAll() throws SQLException {
        List<Account> accounts = dao.findAll();
        for (Account account : accounts) {
            System.out.println(account);
        }
    }
    @Test
    public void findOne() throws SQLException {
        Account account = dao.findAccountById(1);
        System.out.println(account);
    }
    @Test
    public void save() throws SQLException {
        Account account = new Account();
        account.setName("ddd");
        account.setMoney(2000);
        dao.saveAccount(account);
    }
    @Test
    public void update() throws SQLException {
        Account account = new Account();
        account.setId(4);
        account.setName("tony");
        account.setMoney(12000);
        dao.updateAccount(account);
    }
    @Test
    public void delete() throws SQLException {
        dao.deleteAccount(6);
    }
}

二、常用注解

1.1 创建bean的注解

和编写一个bean标签实现的功能一致

• @Component：用于把当前类对象存入spring容器中
  • value：用于指定bean的id，不写默认是当前类名首字母小写

以下三个注解的作用和@component一样，是spring框架为我们提供明确的三层使用的注解，使三层对象更清晰

• @Controller
• @Service
• @Repository

@Service("accountService")
public class AccountServiceImpl implements IAccountservice {
    ……
}

1.2 注入数据的注解

和bean标签中写一个property标签的作用一致

（1）注入bean对象的

• @Autowired：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相匹配，就可以注入
  • 出现位置：可以是变量上，也可以出现在方法上
  • 细节：在使用注解注入时，不需要set方法也可以注入
  • 如果ioc容器中没有任何bean类型和要注入的变量类型一致，报错
  • 如果ioc容器中有多个bean类型和要注入的变量类型一致，也报错

@Autowired
private IAccountDao accountDao = null;

• @Qualifier：在按照类中注入的基础上，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
  • value：用于指定注入bean的id
  • 注意：要和@Autowired一起用

@Qualifier("accountDao2")
private IAccountDao accountDao = null;

• @Resource：直接指定bean的id进行注入，推荐使用
  • name：ioc中该bean的id
  • 注意：可以独立使用

@Resource(name = "accountDao2")
private IAccountDao accountDao = null;

(2) 注入基本数据类型、String类型的

• @Value：用于注入基本类型和string类型的数据
  • value：用于指定数据的值，可以使用spring中的sqEL
  • sqEL写法：${表达式}

@Value("1")
private int id;
@Value("xiaoming")
private String name;

(3)集合、复杂类型的注入只能通过xml方式注入

1.3 用于改变作用范围的注解

和bean标签中使用scope属性的作用一致

• @Scope：指定bean的范围
  • prototype：多例
  • singleton：单例 默认

@Service("accountService")
@Scope("prototype")
public class AccountServiceImpl implements IAccountservice {
	……
}

1.4 生命周期相关

和bean标签中使用init-method、destroy-method属性的作用一致

• @PreDestroy：指定销毁方法
• @PostConstruct：指定初始化方法

@PostConstruct
public void init() {
    System.out.println("初始化方法");;
}

@PreDestroy
public void destroy() {
    System.out.println("销毁方法");
}

三、注解的简单案例

目录结构

3.1 持久层接口和实现类

package dao;

/**
 * @author konley
 * @date 2020-08-15 20:58
 * 账户的持久层接口
 */
public interface IAccountDao {
    /**
     * description: 模拟保存账户
     * @param
     * @return void
     */
    void saveAccount();
}

package dao.impl;

import dao.IAccountDao;
import org.springframework.stereotype.Repository;

/**
 * @author konley
 * @date 2020-08-15 21:00
 */
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {
    @Override
    public void saveAccount() {
        System.out.println("账户保存了");
    }
}

3.2 业务层接口和实现类

package service;

/**
 * @author konley
 * @date 2020-08-15 20:54
 * 操作账户业务层接口
 */
public interface IAccountservice {
    /**
     * description: 模拟保存账户
     * @param
     * @return void
     */
    void saveAccount();
}

package service.impl;

import dao.IAccountDao;
import dao.impl.AccountDaoImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import service.IAccountservice;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.annotation.Resource;
import javax.annotation.Resources;

/**
 * @author konley
 * @date 2020-08-15 20:56
 * 账户业务层实现类
*/

//@Component("accountService")
@Service("accountService")
@Scope("prototype")
public class AccountServiceImpl implements IAccountservice {
    //@Autowired
    //@Qualifier("accountDao")
    @Resource(name = "accountDao")
    private IAccountDao accountDao = null;
    @Override
    public void saveAccount() {
        accountDao.saveAccount();
    }
    @PostConstruct
    public void init() {
        System.out.println("初始化方法");;
    }
    @PreDestroy
    public void destroy() {
        System.out.println("销毁方法");
    }
}

3.3 xml开启扫描

<?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开启注解扫描的包-->
    <context:component-scan base-package="service"></context:component-scan>
    <context:component-scan base-package="dao"></context:component-scan>

</beans>

3.4 测试类

package ui;

import dao.IAccountDao;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import service.IAccountservice;
import service.impl.AccountServiceImpl;

/**
 * @author konley
 * @date 2020-08-15 21:10
 * 模拟表现层，用于调用业务层（servlet）
 */
public class Client {
    public static void main(String[] args) throws Exception {
        ApplicationContext ac =  new ClassPathXmlApplicationContext("bean.xml");
        IAccountservice as = (IAccountservice) ac.getBean("accountService");
        System.out.println(as);
        as.saveAccount();
    }
}

四、配置类注解

• @Configuration：指定当前是一个配置类

  • 当配置类作为AnnotationConfigApplicationContext的参数时，可以不写

• @ComponentScan：通过注解指定要扫描的包

  • value：和basePackage的作用一致，用于指定扫描的包
  • 有多个包时使用数组方式传递

• @Bean：把当前方法的返回值作为bean对象放入ioc容器

  • name：用于指定bean的id，默认值是当前方法名
  • 如果方法有参数，spring会去容器中查找有没有可用的bean对象
  • 查找的方式和AutoWried注解是一样的

• @Import：用于导入其他的配置类

  • value：用于指定其他配置类的字节码，可以是数组
  • 当使用import类的注解后，有import注解的类就是父配置类

• @Properties：用于指定properties文件的位置

  • value：指定文件的名称的位置
  • 关键字classpath：说明文件在src目录下

五、实现纯注解IoC实现

项目结构

5.1 导入坐标

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.2.8.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>8.0.20</version>
    </dependency>
    <dependency>
        <groupId>c3p0</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.1.2</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.13</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>5.2.8.RELEASE</version>
    </dependency>
</dependencies>

5.2 创建数据库和实体类

create table account(
	id int primary key auto_increment,
	name varchar(40),
	money float
)character set utf8 collate utf8_general_ci;

insert into account(name,money) values('aaa',1000);
insert into account(name,money) values('bbb',1000);
insert into account(name,money) values('ccc',1000);

package domain;

import java.io.Serializable;

/**
 * @author konley
 * @date 2020-08-17 12:54
 * 账户的实体类
 */
public class Account implements Serializable {
    private Integer id;
    private String name;
    private float money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + 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;
    }
}

5.3 持久层接口和实现类

package dao;

import domain.Account;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 13:01
 * 账户的持久层接口
 */
public interface IAccountDao {
    /**
     * description: 查询所有
     * @return java.util.List<domain.Account>
     */
    List<Account> findAll() throws SQLException;

    /**
     * description: 查询一个
     * @param id
     * @return domain.Account
     */
    Account findAccountById(Integer id) throws SQLException;

    /**
     * description: 保存
     * @param account
     * @return void
     */
    void saveAccount(Account account) throws SQLException;

    /**
     * description: 更新
     * @param account
     * @return void
     */
    void updateAccount(Account account) throws SQLException;

    /**
     * description: 删除
     * @param id
     * @return void
     */
    void deleteAccount(Integer id) throws SQLException;
}

package dao.impl;

import dao.IAccountDao;
import 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.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 13:03
 */
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {
    
    //这里注入了runner
    @Autowired
    private QueryRunner runner;

    @Override
    public List<Account> findAll() throws SQLException {
        return runner.query("select * from account",new BeanListHandler<Account>(Account.class));
    }

    @Override
    public Account findAccountById(Integer id) throws SQLException {
        return runner.query("select * from account where id = ?",new BeanHandler<Account>(Account.class),id);
    }

    @Override
    public void saveAccount(Account account) throws SQLException {
        runner.update("insert into account(name,money) value(?,?) ",account.getName(),account.getMoney());
    }

    @Override
    public void updateAccount(Account account) throws SQLException {
        runner.update("update account set name = ?,money = ? where id = ? ",account.getName(),account.getMoney(),account.getId());
    }

    @Override
    public void deleteAccount(Integer id) throws SQLException {
        runner.update("delete from account where id = ? ",id);
    }
}

5.4 业务层接口和实现类

package service;

import domain.Account;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 12:54
 * 账户的业务层接口
 */
public interface IAccountService {
    /**
     * description: 查询所有
     * @return java.util.List<domain.Account>
     */
    List<Account> findAll() throws SQLException;

    /**
     * description: 查询一个
     * @param id
     * @return domain.Account
     */
    Account findAccountById(Integer id) throws SQLException;

    /**
     * description: 保存
     * @param account
     * @return void
     */
    void saveAccount(Account account) throws SQLException;

    /**
     * description: 更新
     * @param account
     * @return void
     */
    void updateAccount(Account account) throws SQLException;

    /**
     * description: 删除
     * @param id
     * @return void
     */
    void deleteAccount(Integer id) throws SQLException;
}

package service.impl;

import dao.IAccountDao;
import domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import service.IAccountService;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 12:59
 * 业务层实现类
 */
@Service("accountService")
public class AccountServiceImpl implements IAccountService {
    @Autowired
    private IAccountDao accountDao;

    @Override
    public List<Account> findAll() throws SQLException {
        return accountDao.findAll();
    }

    @Override
    public Account findAccountById(Integer id) throws SQLException {
        return accountDao.findAccountById(id);
    }

    @Override
    public void saveAccount(Account account) throws SQLException {
        accountDao.saveAccount(account);
    }

    @Override
    public void updateAccount(Account account) throws SQLException {
        accountDao.updateAccount(account);
    }

    @Override
    public void deleteAccount(Integer id) throws SQLException {
        accountDao.deleteAccount(id);
    }
}

5.5 创建主注解配置类

package config;
import org.springframework.context.annotation.*;

//声明当前是一个配置类
@Configuration
//扫描dao和service包的注解
@ComponentScan({"dao","service"})
//导入数据库注解配置类
@Import(JdbcConfig.class)
//导入数据库连接相关的信息
@PropertySource("classpath:jdbcConfig.properties")
public class SpringConfiguration {

}

5.6 创建数据库配置文件

jdbcConfig.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone = GMT
jdbc.username=root
jdbc.password=123456

5.7 创建数据库注解配置子类

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.Scope;

import javax.sql.DataSource;

/**
 * @author konley
 * @date 2020-08-17 14:33
 * 和spring连接数据库相关的配置类
 */
public class JdbcConfig {
    /**
    *使用Value注入普通类型数据，读取properties在主配置类中完成了
    */
    @Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;
    
    /**
     * description: 创建QueryRunner对象并使用Bean注解将其加载到容器中
     * @param dataSource
     * @return org.apache.commons.dbutils.QueryRunner
     */
    @Bean(name = "runner")
    @Scope("prototype")
    public QueryRunner createQueryRunner(DataSource dataSource){
        return new QueryRunner(dataSource);
    }

    /**
     * description: 创建数据源并使用Bean注解将其加载到容器中
     * @param
     * @return javax.sql.DataSource
     */
    @Bean(name = "dataSource")
    public DataSource createDataSource(){
        ComboPooledDataSource ds = new ComboPooledDataSource();
        try {
            ds.setDriverClass(driver);
            ds.setJdbcUrl(url);
            ds.setUser(username);
            ds.setPassword(password);
        }catch (Exception e){
            e.printStackTrace();
        }
        return ds;
    }
}

5.8 测试类

此时，不再使用ClassPathXmlApplicationContext类通过读取xml来创建容器了

而是使用AnnotationConfigApplicationContext类通过加载主配置类来创建容器

ApplicationContext app = new AnnotationConfigApplicationContext(主配置类.class);

import dao.IAccountDao;
import domain.Account;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.sql.SQLException;
import java.util.List;

/**
 * @author konley
 * @date 2020-08-17 13:21
 * 测试纯注解配置
 */
public class AccountServiceTest {
    private ApplicationContext app;
    private IAccountDao dao;

    @Before
    public void getDao(){
        //app = new ClassPathXmlApplicationContext("beans.xml");
        app = new AnnotationConfigApplicationContext(SpringConfiguration.class);

        dao = app.getBean("accountDao", IAccountDao.class);
    }

    @Test
    public void findAll() throws SQLException {
        List<Account> accounts = dao.findAll();
        for (Account account : accounts) {
            System.out.println(account);
        }
    }
    @Test
    public void findOne() throws SQLException {
        Account account = dao.findAccountById(1);
        System.out.println(account);
    }
    @Test
    public void save() throws SQLException {
        Account account = new Account();
        account.setName("ddd");
        account.setMoney(2000);
        dao.saveAccount(account);
    }
    @Test
    public void update() throws SQLException {
        Account account = new Account();
        account.setId(4);
        account.setName("tony");
        account.setMoney(12000);
        dao.updateAccount(account);
    }
    @Test
    public void delete() throws SQLException {
        dao.deleteAccount(6);
    }
}