文章目录

• 一、前期准备
• 1、创建Maven工程
• 2、在pom.xml中配置相关坐标
• 3、创建实体类
• 4、创建持久层接口
• 编写持久层接口实现类

• 编写业务层实现类

一、前期准备

1、创建Maven工程

打开IDEA，新建一个Maven工程，命名为Spring_xml_IoC

数据库代码：

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);

2、在pom.xml中配置相关坐标

<?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>org.example</groupId>
<artifactId>Spring01_xml_IOC</artifactId>
<version>1.0-SNAPSHOT</version>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>6</source>
<target>6</target>
</configuration>
</plugin>
</plugins>
</build>
<packaging>jar</packaging>
<dependencies>
<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.5.RELEASE</version>
</dependency>
<!-- dbutils -->
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.4</version>
</dependency>
<!-- mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
</dependency>
<!-- 连接池 -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>

3、创建实体类

账户实体类，并且实现序列化接口

import java.io.Serializable;
import java.math.BigInteger;
/**
* 账户实体类，并且实现序列化接口
*/
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、创建持久层接口

/**
* 账户的持久层接口
*/
public interface IAccountDao {

/**
* 查询所有
*/
List<Account> findAll();

/**
* 查询一个
*/
List<Account> findById(Integer id);

/**
* 保存账户
*/
void saveAccount(Account account);

/**
* 更新
*/
void updateAccount(Account account);

/**
*删除
*/
void deleteAccount(Integer id);
}

编写持久层接口实现类

/**
* 账户的持久层实现类
*/
public class AccountDaoImpl implements IAccountDao {
private QueryRunner queryRunner;
@Override
public List<Account> findAll() {
try {
return queryRunner.query("select * from account",new BeanListHandler<Account>(Account.class));
} catch (SQLException e) {
throw new RuntimeException(e);
}
}

@Override
public Account findById(Integer id) {
try {
return queryRunner.query("select * from account where id = ?",new BeanHandler<Account>(Account.class),id);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}

@Override
public void saveAccount(Account account) {
try {
queryRunner.update("insert into account(name,money)values(?,?)",account.getName(),account.getMoney());
} catch (SQLException e) {
throw new RuntimeException(e);
}
}

@Override
public void updateAccount(Account account) {
try {
queryRunner.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
} catch (SQLException e) {
throw new RuntimeException(e);
}
}

@Override
public void deleteAccount(Integer id) {
try {
queryRunner.update("delete from account where id=?",id);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}

public void setQueryRunner(QueryRunner queryRunner) {
this.queryRunner = queryRunner;
}
}

5、创建业务层接口

/**
* 账户业务层的接口
*/
public interface IAccountService {

/**
* 查询所有
*/
List<Account> findAll();

/**
* 查询一个
*/
List<Account> findById(Integer id);

/**
* 保存账户
*/
void saveAccount(Account account);

/**
* 更新
*/
void updateAccount(Account account);

/**
*删除
*/
void deleteAccount(Integer id);
}

编写业务层实现类

/**
* 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> findAll() {

return accountDao.findAll();
}

@Override
public Account findById(Integer id) {

return accountDao.findById(id);
}

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

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

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

二、编写配置文件

class路径需要根据实际情况更改

<?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.Answer.service.impl.AccountServiceImpl">
<!-- set方法注入 -->
<property name="accountDao" ref="accountDao"></property>
</bean>
<!-- 配置 dao -->
<bean id="accountDao" class="com.Answer.dao.impl.AccountDaoImpl">
<property name="queryRunner" ref="queryRunner"></property>
</bean>
<!-- 配置QueryRunner-->
<bean id="queryRunner" class="org.apache.commons.dbutils.QueryRunner">
<!-- 构造函数注入 -->
<constructor-arg name="ds" ref="dataSource"></constructor-arg>
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///sTest"></property>
<property name="user" value="root"></property>
<property name="password" value="123456"></property>
</bean>
</beans>

三、项目测试

编写测试类

public class AccountServiceTest {
/**
* 测试保存
*/
@Test
public void testSaveAccount() {
Account account = new Account();
account.setName("aaa");
account.setMoney(100000f);
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
IAccountService as = ac.getBean("accountService", IAccountService.class);
as.saveAccount(account);
}
/**
* 测试查询一个
*/
@Test
public void testFindAccountById() {
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
IAccountService as = ac.getBean("accountService",IAccountService.class);
Account account = as.findById(2);
System.out.println(account);
}
/**
* 测试更新
*/
@Test
public void testUpdateAccount() {
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
IAccountService as = ac.getBean("accountService",IAccountService.class);
Account account = as.findById(4);
account.setMoney(20301050f);
as.updateAccount(account);
}
/**
* 测试删除
*/
@Test
public void testDeleteAccount() {
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
IAccountService as = ac.getBean("accountService",IAccountService.class);
as.deleteAccount(1);
}
/**
* 测试查询所有
*/
@Test
public void testFindAllAccount() {
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
IAccountService as = ac.getBean("accountService",IAccountService.class);
List<Account> list = as.findAll();
for(Account account : list) {
System.out.println(account);
}
}
}

查询所有测试结果：

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