目录
基于xml的CRUD
- 使用C3P0连接池
- 使用dbutils包中的QueryRunner类来对数据库进行操作
代码实现
pom.xml
<?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.zjw</groupId>
<artifactId>day02_eesy_02account_xmlioc</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>17</java.version>
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
<encoding>UTF-8</encoding>
<spring.version>6.1.1</spring.version>
<lombok.version>1.18.30</lombok.version>
<mysql.version>8.0.33</mysql.version>
<dbutils.version>1.7</dbutils.version>
<c3p0.version>0.9.1.2</c3p0.version>
<junit.version>4.13.2</junit.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>${dbutils.version}</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>${c3p0.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
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.zjw.service.impl.AccountServiceImpl">
<!--注入dao-->
<property name="accountDao" ref="accountDao"/>
</bean>
<!--配置Dao对象-->
<bean id="accountDao" class="com.zjw.dao.impl.AccountDaoImpl">
<!--使用spring 方法注入创建多例的runner Spring应用了CGLIB（动态代理）-->
<lookup-method name="getRunner" bean="runner"/>
</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"/>
</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 name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/eesy_spring?useSSL=false&serverTimeZone=Asia\Shanghai"/>
<property name="user" value="root"/>
<property name="password" value="123456"/>
</bean>
</beans>
Dao层实现
package com.zjw.dao.impl;
import com.zjw.dao.IAccountDao;
import com.zjw.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;
/**
* 账户的持久层实现类
*/
//@Getter
public class AccountDaoImpl implements IAccountDao {
private QueryRunner runner;
// 虽然有get方法，但是并不会执行，而是由容器提供一个动态代理的实现
public QueryRunner getRunner() {
System.out.println("getRunner方法执行....");
return runner;
}
@Override
public List<Account> findAllAccount() {
try {
return getRunner().query("SELECT * FROM account",new BeanListHandler<>(Account.class));
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
@Override
public Account findAccountById(Integer accountId) {
try {
return getRunner().query("SELECT * FROM account WHERE id=?",new BeanHandler<>(Account.class),accountId);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
@Override
public void saveAccount(Account account) {
try {
getRunner().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 {
getRunner().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 accountId) {
try {
getRunner().update("DELETE FROM account WHERE id=?",accountId);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
Service层实现
package com.zjw.service.impl;
import com.zjw.dao.IAccountDao;
import com.zjw.domain.Account;
import com.zjw.service.IAccountService;
import lombok.Setter;
import java.util.List;
/**
* 账户的业务层实现类
* @author zjw
*/
@Setter
public class AccountServiceImpl implements IAccountService {
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 accountId) {
accountDao.deleteAccount(accountId);
}
}
测试
package com.zjw.test;
import com.zjw.domain.Account;
import com.zjw.service.IAccountService;
import org.junit.Before;
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 {
private ApplicationContext ac ;
/**
* 1. 初始化容器
*/
@Before
public void init(){
ac = new ClassPathXmlApplicationContext("bean.xml");
}
@Test
public void testFindAll(){
IAccountService accountService = ac.getBean("accountService", IAccountService.class);
List<Account> accountList = accountService.findAllAccount();
for (Account account : accountList) {
System.out.println(account);
}
}
@Test
public void testFindAccountById(){
IAccountService accountService = ac.getBean("accountService", IAccountService.class);
Account account = accountService.findAccountById(1);
System.out.println(account);
}
@Test
public void testSaveAccount(){
IAccountService accountService = ac.getBean("accountService", IAccountService.class);
Account account = new Account();
account.setId(7);
account.setName("abc");
account.setMoney(9999f);
accountService.saveAccount(account);
}
@Test
public void testUpdateAccount(){
IAccountService accountService = ac.getBean("accountService", IAccountService.class);
Account account = accountService.findAccountById(1);
System.out.println(account);
account.setMoney(888F);
accountService.updateAccount(account);
}
@Test
public void testDeleteAccount(){
IAccountService accountService = ac.getBean("accountService", IAccountService.class);
accountService.deleteAccount(7);
}
}