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【旧】G004Spring学习笔记-IOC案例


一、XML方式实现

1、数据库创建语句

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、pom.xml文件

<?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>spring05</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>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.19</version>
</dependency>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.4</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-beta-3</version>
<scope>test</scope>
</dependency>

</dependencies>

</project>

3、bean.xml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="com.zibo.service.impl.AccountServiceImpl">
<!--注入dao-->
<property name="accountDao" ref="accountDao"/>
</bean>
<!--配置Dao-->
<bean id="accountDao" class="com.zibo.dao.impl.AccountDaoImpl">
<!--注入QueryRunner-->
<property name="runner" ref="runner"/>
</bean>
<!--配置QueryRunner,多例-->
<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">
<!--注入连接数据库的信息-->
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/zibo?serverTimezone=UTC"/>
<property name="user" value="***************"/>
<property name="password" value="***************"/>
</bean>
</beans>

4、接口IAccountDao

package com.zibo.dao;

import com.zibo.domain.Account;

import java.util.List;

public interface IAccountDao {
//查询所有账户
List<Account> findAllAccount();
//根据id查询账户
Account findAccountById(Integer accountId);
//保存账户
void saveAccount(Account account);
//更新账户
void updateAccount(Account account);
//删除用户
void deleteAccountById(Integer accountId);
}

5、接口实现类AccountDaoImpl

package com.zibo.dao.impl;

import com.zibo.dao.IAccountDao;
import com.zibo.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 IAccountDao {

private QueryRunner runner;

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

@Override
public List<Account> findAllAccount() {
try {
return runner.query("select * from account",new BeanListHandler<>(Account.class));
}catch (Exception e){
throw new RuntimeException(e);
}
}

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

@Override
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);
}
}

@Override
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);
}
}

@Override
public void deleteAccountById(Integer accountId) {
try {
runner.update("delete from account where id = ?",accountId);
}catch (Exception e){
throw new RuntimeException(e);
}
}
}

6、接口IAccountService

package com.zibo.service;

import com.zibo.domain.Account;

import java.util.List;

/**
* 账户的业务层接口
*/
public interface IAccountService {
//查询所有账户
List<Account> findAllAccount();
//根据id查询账户
Account findAccountById(Integer accountId);
//保存账户
void saveAccount(Account account);
//更新账户
void updateAccount(Account account);
//删除用户
void deleteAccountById(Integer accountId);
}

7、接口实现类AccountServiceImpl

package com.zibo.service.impl;

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

import java.util.List;

public class AccountServiceImpl implements IAccountService {

private IAccountDao accountDao;

public void setAccountDao(IAccountDao accountDao) {
this.accountDao = 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 deleteAccountById(Integer accountId) {
accountDao.deleteAccountById(accountId);
}
}

8、实体类Account

package com.zibo.domain;

import java.io.Serializable;

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 +
'}';
}
}

9、测试类AccountServiceTest

package com.zibo.test;

import com.zibo.domain.Account;
import com.zibo.service.IAccountService;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

/**
* 使用junit单元测试进行测试
*/
public class AccountServiceTest {
private ClassPathXmlApplicationContext ac;
private IAccountService as;
@Before
public void init(){
//1、获取容器
ac = new ClassPathXmlApplicationContext("bean.xml");
//2、得到业务层对象
as = ac.getBean("accountService",IAccountService.class);
}
@Before
public void end(){
ac.close();
}
@Test
public void testFindAllAccount(){
//3、执行方法
List<Account> accounts = as.findAllAccount();
//4、遍历输出
for (Account account : accounts) {
System.out.println(account);
}
}
@Test
public void testFindAccountById(){
Account account = as.findAccountById(1);
System.out.println(account);
}
@Test
public void testSave(){
Account account = new Account();
account.setName("大哥");
account.setMoney(2000);
as.saveAccount(account);
}
@Test
public void testUpdate(){
Account account = new Account();
account.setId(3);
account.setName("二哥");
account.setMoney(3000);
as.updateAccount(account);
}
@Test
public void testDelete(){
as.deleteAccountById(1);
}
}

 

二、注解方式实现

1、说明

目前的注解方式只需要对XML稍作修改,下面把更改的代码贴出来,其余代码见上面;

 

2、代码

bean.xml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"
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">
<!--告诉spring要创建容器时要扫描的包,但是配置所需要的标签不在<beans/>标签中,
而是一个名称为context的名称空间和约束中-->
<context:component-scan base-package="com.zibo"/>
<!--配置QueryRunner,多例-->
<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">
<!--注入连接数据库的信息-->
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/zibo?serverTimezone=UTC"/>
<property name="user" value="***************"/>
<property name="password" value="***************"/>
</bean>
</beans>

接口实现类AccountServiceImpl:

package com.zibo.service.impl;

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

import java.util.List;

/**
* 账户的业务层实现类
*/
@Service("accountService")
public class AccountServiceImpl implements IAccountService {
@Autowired
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 deleteAccountById(Integer accountId) {
accountDao.deleteAccountById(accountId);
}
}

接口实现类AccountDaoImpl:

package com.zibo.dao.impl;

import com.zibo.dao.IAccountDao;
import com.zibo.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.util.List;

/**
* 账户的持久层实现类
*/
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {
@Autowired
private QueryRunner runner;

@Override
public List<Account> findAllAccount() {
try {
return runner.query("select * from account",new BeanListHandler<>(Account.class));
}catch (Exception e){
throw new RuntimeException(e);
}
}

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

@Override
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);
}
}

@Override
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);
}
}

@Override
public void deleteAccountById(Integer accountId) {
try {
runner.update("delete from account where id = ?",accountId);
}catch (Exception e){
throw new RuntimeException(e);
}
}
}

 

 

 

 

 

 

 

 

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