Spring的IOC方式实现账户的CRUD操作案例，基于xml方式

1、需求

　　实现账户的 CRUD 操作

2、技术选取

　　使用 spring 的 IoC 实现对象的管理

　　使用 DBAssit 作为持久层解决方案

　　使用 c3p0 数据源

3、环境jar包

　　

 

 

 4、数据库创建和实体类编写

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);

/**
* 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;
　　}
}

5、持久层代码

public interface IAccountDao {
/**
* 保存
* @param account
*/
void save(Account account);
/**
* 更新
* @param account
*/
void update(Account account);
/**
* 删除
* @param accountId
*/
void delete(Integer accountId);
/**
* 根据 id 查询
* @param accountId
* @return
*/
Account findById(Integer accountId);
/**
* 查询所有
* @return
*/
List<Account> findAll();
}

public class AccountDaoImpl implements IAccountDao {
　　private DBAssit dbAssit;
　　public void setDbAssit(DBAssit dbAssit) {
　　　　this.dbAssit = dbAssit;
　　}
　　@Override
　　public void save(Account account) {
　　　　dbAssit.update("insert into account(name,money)values(?,?)",account.getName(),account.getMoney());
　　}
　　@Override
　　public void update(Account account) {
　　　　dbAssit.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
　　}
　　@Override
　　public void delete(Integer accountId) {
　　　　dbAssit.update("delete from account where id=?",accountId);
　　}
　　@Override
　　public Account findById(Integer accountId) {
　　　　return dbAssit.query("select * from account where id=?",new BeanHandler<Account>(Account.class),accountId);
　　}
　　@Override
　　public List<Account> findAll() {
　　　　return dbAssit.query("select * from account where id=?",new BeanListHandler<Account>(Account.class));
　　}
}

6、业务层代码

public interface IAccountService {
/**
* 保存账户
* @param account
*/
void saveAccount(Account account);
/**
* 更新账户
* @param account
*/
void updateAccount(Account account);
/**
* 删除账户
* @param account
*/
void deleteAccount(Integer accountId);
/**
* 根据 id 查询账户
* @param accountId
* @return
*/
Account findAccountById(Integer accountId);
/**
* 查询所有账户
* @return
*/
List<Account> findAllAccount();
}

public class AccountServiceImpl implements IAccountService {
private IAccountDao accountDao;
public void setAccountDao(IAccountDao accountDao) {
this.accountDao = accountDao;
}
@Override
public void saveAccount(Account account) {
accountDao.save(account);
}
@Override
public void updateAccount(Account account) {
accountDao.update(account);
}
@Override
public void deleteAccount(Integer accountId) {
accountDao.delete(accountId);
}
@Override
public Account findAccountById(Integer accountId) {
return accountDao.findById(accountId);
}
@Override
public List<Account> findAllAccount() {
return accountDao.findAll();
}
}

6、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 service -->
<bean id="accountService"
class="service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"></property>
</bean>
<!-- 配置 dao -->
<bean id="accountDao" class="dao.impl.AccountDaoImpl">
<property name="dbAssit" ref="dbAssit"></property>
</bean>
<!-- 配置 dbAssit 此处我们只注入了数据源，表明每条语句独立事务-->
<bean id="dbAssit" class="com.dbassit.DBAssit">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql:///spring_day02"></property>
<property name="user" value="root"></property>
<property name="password" value="1234"></property>
</bean>
</beans>

7、测试

public class AccountServiceTest {
/**
* 测试保存
*/
@Test
public void testSaveAccount() {
Account account = new Account();
account.setName("程序员");
account.setMoney(1000f);
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.findAccountById(1);
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.findAccountById(1);
account.setMoney(203050f);
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.findAllAccount();
for(Account account : list) {
System.out.println(account);
}
}
}