1 需求和技术要求
1.1 需求
1.2 技术要求
- 使用Spring的IOC实现对象的管理。
- 使用QueryRunner作为持久层的解决方案。
- 使用C3p0作为数据源。
2 搭建环境并配置
2.1 导入所需要的依赖jar包的maven坐标
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.2.0.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.17</version>
</dependency>
<dependency>
<groupId>commons-dbutils</groupId>
<artifactId>commons-dbutils</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.4</version>
</dependency>
2.2 数据库脚本
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;-- ----------------------------
-- Table structure for account
-- ----------------------------
DROP TABLE IF EXISTS `account`;
CREATE TABLE `account` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
`name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '名称',
`money` double(11, 0) NULL DEFAULT NULL COMMENT '余额',
PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;-- ----------------------------
-- Records of account
-- ----------------------------
INSERT INTO `account` VALUES (1, 'aaa', 1000);
INSERT INTO `account` VALUES (2, 'bbb', 1000);SET FOREIGN_KEY_CHECKS = 1;
2.3 编写实体类
package com.sunxiaping.spring5.domain;import java.io.Serializable;/**
* 账户
*/
public class Account implements Serializable { private Integer id; private String name; private Double 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 Double getMoney() {
return money;
} public void setMoney(Double money) {
this.money = money;
}}
2.4 编写持久层代码
package com.sunxiaping.spring5.dao;import com.sunxiaping.spring5.domain.Account;import java.util.List;/**
* 账户的持久层接口
*/
public interface IAccountDao { /**
* 保存账户
*
* @param account
*/
void save(Account account); /**
* 更新账户
*
* @param account
*/
void update(Account account); /**
* 删除账户
*
* @param id
*/
void delete(Integer id); /**
* 根据主键查询账户信息
*
* @param id
* @return
*/
Account findById(Integer id); /**
* 查询所有
*
* @return
*/
List<Account> findAll();}
package com.sunxiaping.spring5.dao.impl;import com.sunxiaping.spring5.dao.IAccountDao;
import com.sunxiaping.spring5.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.sql.SQLException;
import java.util.List;@Repository
public class AccountDaoImpl implements IAccountDao { @Autowired
private QueryRunner queryRunner; @Override
public void save(Account account) {
try {
queryRunner.update("insert into account(name,money) values (?,?)", account.getName(), account.getMoney());
} catch (SQLException e) {
e.printStackTrace();
}
} @Override
public void update(Account account) {
try {
queryRunner.update("update account set name=?,money=? where id = ?", account.getName(), account.getMoney(), account.getId());
} catch (SQLException e) {
e.printStackTrace();
}
} @Override
public void delete(Integer id) {
try {
queryRunner.update("delete from account where id = ?", id);
} catch (SQLException e) {
e.printStackTrace();
}
} @Override
public Account findById(Integer id) {
try {
return queryRunner.query("select * from account where id = ?", new BeanHandler<>(Account.class), id);
} catch (SQLException e) {
e.printStackTrace();
}
return null;
} @Override
public List<Account> findAll() {
try {
return queryRunner.query("select * from account", new BeanListHandler<>(Account.class));
} catch (SQLException e) {
e.printStackTrace();
} return null;
}
}
2.5 编写业务层代码
package com.sunxiaping.spring5.service;import com.sunxiaping.spring5.domain.Account;import java.util.List;public interface IAccountService { /**
* 保存账户
*
* @param account
*/
void save(Account account); /**
* 更新账户
*
* @param account
*/
void update(Account account); /**
* 删除账户
*
* @param id
*/
void delete(Integer id); /**
* 根据主键查询账户信息
*
* @param id
* @return
*/
Account findById(Integer id); /**
* 查询所有
*
* @return
*/
List<Account> findAll();
}
package com.sunxiaping.spring5.service.impl;import com.sunxiaping.spring5.dao.IAccountDao;
import com.sunxiaping.spring5.domain.Account;
import com.sunxiaping.spring5.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;@Service
public class AccountServiceImpl implements IAccountService { @Autowired
private IAccountDao accountDao; @Override
public void save(Account account) {
accountDao.save(account);
} @Override
public void update(Account account) {
accountDao.update(account);
} @Override
public void delete(Integer id) {
accountDao.delete(id);
} @Override
public Account findById(Integer id) {
return accountDao.findById(id);
} @Override
public List<Account> findAll() {
return accountDao.findAll();
}
}
2.6 数据库配置文件
jdbc.driverClass=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&useSSL=false&serverTimezone=GMT%2B8&allowPublicKeyRetrieval=true
jdbc.user=root
jdbc.password=123456
2.7 数据库配置类
package com.sunxiaping.spring5.config;import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.apache.commons.dbutils.QueryRunner;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;import javax.sql.DataSource;
import java.beans.PropertyVetoException;@PropertySource("classpath:jdbc.properties")
public class JdbcConfig { @Value("${jdbc.driverClass}")
private String driverClass;
@Value("${jdbc.url}")
private String jdbcUrl;
@Value("${jdbc.user}")
private String user;
@Value("${jdbc.password}")
private String password; @Bean
public DataSource dataSource() {
try {
ComboPooledDataSource dataSource = new ComboPooledDataSource();
dataSource.setJdbcUrl(jdbcUrl);
dataSource.setDriverClass(driverClass);
dataSource.setUser(user);
dataSource.setPassword(password);
return dataSource;
} catch (PropertyVetoException e) {
throw new RuntimeException(e);
}
} @Bean
public QueryRunner queryRunner(DataSource dataSource) {
return new QueryRunner(dataSource);
}
}
2.8 Spring的配置类
package com.sunxiaping.spring5.config;import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;@Configuration
@ComponentScan("com.sunxiaping.spring5")
@Import(JdbcConfig.class)
public class SpringConfiguration {}
2.9 测试
package com.sunxiaping;import com.sunxiaping.spring5.config.SpringConfiguration;
import com.sunxiaping.spring5.service.IAccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfiguration.class)
public class spring5Test { @Autowired
private IAccountService accountService; @Test
public void test() {
System.out.println(accountService); }}
