该案例使用dbutils作为数据持久层,spring实现业务层,实现CRUD。
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.qublog</groupId>
<artifactId>spring02_account_xml_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>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
</dependencies>
</project>
Account类:
package com.qublog.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 +
'}';
}
}
AccountDao接口:
package com.qublog.dao;
import com.qublog.domain.Account;
import java.util.List;
//账户的持久层接口
public interface AccountDao {
//查询所有
List<Account> findAllAccount();
//查询一个
Account findAccountById(Integer id);
//保存
void saveAccount(Account account);
//更新
void updateAccount(Account account);
//删除
void deleteAccount(Integer id);
}
AccountDaoImpl类:
package com.qublog.dao.impl;
import com.qublog.dao.AccountDao;
import com.qublog.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 AccountDao {
private QueryRunner runner;
public void setRunner(QueryRunner runner) {
this.runner = runner;
}
public List<Account> findAllAccount() {
try{
return runner.query("select * from account;",new BeanListHandler<Account>(Account.class));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public Account findAccountById(Integer id) {
try{
return runner.query("select * from account where id=?;",new BeanHandler<Account>(Account.class),id);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
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);
}
}
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);
}
}
public void deleteAccount(Integer id) {
try{
runner.update("delete from account where id=?;",id);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
AccountService接口:
package com.qublog.service;
import com.qublog.domain.Account;
import java.util.List;
//账户的业务层接口
public interface AccountService {
//查询所有
List<Account> findAllAccount();
//查询一个
Account findAccountById(Integer id);
//保存
void saveAccount(Account account);
//更新
void updateAccount(Account account);
//删除
void deleteAccount(Integer id);
}
AccountServiceimpl类:
package com.qublog.service.impl;
import com.qublog.dao.AccountDao;
import com.qublog.domain.Account;
import com.qublog.service.AccountService;
import java.util.List;
//账户的业务层实现类
public class AccountServiceImpl implements AccountService {
private AccountDao accountDao;
public void setAccountDao(AccountDao accountDao) {
this.accountDao = accountDao;
}
public List<Account> findAllAccount() {
return accountDao.findAllAccount();
}
public Account findAccountById(Integer id) {
return accountDao.findAccountById(id);
}
public void saveAccount(Account account) {
accountDao.saveAccount(account);
}
public void updateAccount(Account account) {
accountDao.updateAccount(account);
}
public void deleteAccount(Integer id) {
accountDao.deleteAccount(id);
}
}
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.qublog.service.impl.AccountServiceImpl">
<!-- 注入dao -->
<property name="accountDao" ref="accountDao"></property>
</bean>
<!-- 配置dao对象 -->
<bean id="accountDao" class="com.qublog.dao.impl.AccountDaoImpl">
<property name="runner" ref="runner"></property>
</bean>
<!-- 配置QueryRunner对象 -->
<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.cj.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/springtest?serverTimezone=UTC"></property>
<property name="user" value="root"></property>
<property name="password" value="1234"></property>
</bean>
</beans>
AccountServiceTest类:
package com.qublog.test;
import com.qublog.domain.Account;
import com.qublog.service.AccountService;
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() {
//获取容器
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//得到业务层对象
AccountService as = (AccountService) ac.getBean("accountService");
//执行方法
List<Account> accounts = as.findAllAccount();
for (Account account:accounts) {
System.out.println(account);
}
}
@Test
public void testFindOne() {
//获取容器
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//得到业务层对象
AccountService as = (AccountService) ac.getBean("accountService");
//执行方法
Account account = as.findAccountById(1);
System.out.println(account);
}
@Test
public void testSave() {
//获取容器
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//得到业务层对象
AccountService as = (AccountService) ac.getBean("accountService");
//执行方法
Account account = new Account();
account.setName("test");
account.setMoney(666f);
as.saveAccount(account);
}
@Test
public void testUpdate() {
//获取容器
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//得到业务层对象
AccountService as = (AccountService) ac.getBean("accountService");
//执行方法
Account account = as.findAccountById(4);
account.setMoney(23456f);
as.updateAccount(account);
}
@Test
public void testDelete() {
//获取容器
ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
//得到业务层对象
AccountService as = (AccountService) ac.getBean("accountService");
//执行方法
as.deleteAccount(4);
}
}