基于XML连接MySQL

package com.it.domain;import java.io.Serializable;/*** @Author: 东方老赢* @Date: 2020/4/2 11:07** 账户的实体类*/
public class Account implements Serializable {private Integer id;private String name;private Float money;public Account(Integer id, String name, Float money) {this.id = id;this.name = name;this.money = money;}public Account(String name, Float money) {this.name = name;this.money = money;}public Account(){}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;}@Overridepublic String toString() {return "Account{" +"id=" + id +", name='" + name + '\'' +", money=" + money +'}';}
}

package com.it.dao;import com.it.domain.Account;import java.util.List;/*** @Author: 东方老赢* @Date: 2020/4/2 11:20*/
public interface IAccountDao {/*** 查询所有* @return*/List<Account> findAllAccount();/*** 查询一个* @return*/Account findAccount(Integer accountId);/*** 保存* @param account*/void saveAccount(Account account);/*** 更新* @param account*/void updateAccount(Account account);/*** 删除* @param accountId*/void deleteAccount(Integer accountId);
}

package com.it.dao.impl;import com.it.dao.IAccountDao;
import com.it.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;/*** @Author: 东方老赢* @Date: 2020/4/2 11:19*/
public class AccountDaoImpl implements IAccountDao{private QueryRunner runner;public AccountDaoImpl(QueryRunner runner) {this.runner = runner;}public AccountDaoImpl() {}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 findAccount(Integer accountId) {try {return runner.query("select * from account where id = ?",new BeanHandler<Account>(Account.class),accountId);} 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 accountId) {try {runner.update("delete from account where id = ?",accountId);} catch (Exception e) {throw new RuntimeException(e);}}public void setRunner(QueryRunner runner) {this.runner = runner;}public QueryRunner getRunner() {return runner;}
}

package com.it.service;import com.it.domain.Account;import java.util.List;/*** @Author: 东方老赢* @Date: 2020/4/2 11:06** 账户的业务层接口*/
public interface IAccountService {/*** 查询所有* @return*/List<Account> findAllAccount();/*** 查询一个* @return*/Account findAccount(Integer accountId);/*** 保存* @param account*/void saveAccount(Account account);/*** 更新* @param account*/void updateAccount(Account account);/*** 删除* @param accountId*/void deleteAccount(Integer accountId);
}

package com.it.service.impl;import com.it.dao.IAccountDao;
import com.it.domain.Account;
import com.it.service.IAccountService;import java.util.List;/*** @Author: 东方老赢* @Date: 2020/4/2 11:18** 账户的业务层*/
public class AccountServiceImpl implements IAccountService {private IAccountDao accountDao;public void setAccountDao(IAccountDao accountDao) {this.accountDao = accountDao;}public List<Account> findAllAccount() {return accountDao.findAllAccount();}public Account findAccount(Integer accountId) {return accountDao.findAccount(accountId);}public void saveAccount(Account account) {accountDao.saveAccount(account);}public void updateAccount(Account account) {accountDao.updateAccount(account);}public void deleteAccount(Integer accountId) {accountDao.deleteAccount(accountId);}
}

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd"><!--1.配置Service对象--><bean id="accountService" class="com.it.service.impl.AccountServiceImpl"><!--注入dao--><property name="accountDao" ref="accountDao"></property></bean><!--2.配置Dao对象--><bean id="accountDao" class="com.it.dao.impl.AccountDaoImpl"><!--注入QueryRunner--><property name="runner" ref="runner"></property></bean><!--3.配置Queryrunner对象:多例，防止线程冲突--><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><!--4.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.jdbc.Driver"></property><property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring"></property><property name="user" value="root"></property><property name="password" value="123456"></property></bean></beans>

<?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.it</groupId><artifactId>day02_eesy_03account _annoioc</artifactId><version>1.0-SNAPSHOT</version><packaging>jar</packaging><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.2.0.RELEASE</version></dependency><dependency><groupId>commons-dbutils</groupId><artifactId>commons-dbutils</artifactId><version>1.6</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.36</version></dependency><dependency><groupId>c3p0</groupId><artifactId>c3p0</artifactId><version>0.9.1.1</version></dependency><dependency><groupId>org.junit</groupId><artifactId>com.springsource.org.junit</artifactId><version>4.7.0</version><scope>test</scope></dependency></dependencies></project>

基于注解连接MySQL

这里只展示与xml不同的部分

<?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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><context:component-scan base-package="com.it"/><bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"><constructor-arg name="ds" ref="dataSource"></constructor-arg></bean><bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"><property name="driverClass" value="com.mysql.jdbc.Driver"></property><property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring"></property><property name="user" value="root"></property><property name="password" value="123456"></property></bean>
</beans>

package com.it.dao;import com.it.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;/*** @Author: 东方老赢* @Date: 2020/4/3 10:02*/
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao{@Autowiredprivate QueryRunner runner;//    public List<Account> findAll() {//        try {//            return runner.query("select * from account",new BeanListHandler<Account>(Account.class));
//        } catch (Exception e) {//           throw new RuntimeException(e);
//        }
//    }public AccountDaoImpl(){}public List<Account> findAll() {try {return runner.query("select * from account",new BeanListHandler<Account>(Account.class));} catch (Exception e) {throw new RuntimeException(e);}}public Account find(Integer accountId) {try {return runner.query("select * from account where id =?",new BeanHandler<Account>(Account.class),accountId);} catch (Exception e) {throw new RuntimeException(e);}}public void save(Account account) {try {runner.update("insert into account(name,money) values(?,?)",account.getName(),account.getMoney());} catch (Exception e) {throw new RuntimeException(e);}}public void delete(Integer accountId) {try {runner.update("delete from account where id = ?",accountId);} catch (Exception e) {throw new RuntimeException(e);}}public void update(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);}}}


package com.it.service;import com.it.dao.AccountDaoImpl;
import com.it.dao.IAccountDao;
import com.it.domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;/*** @Author: 东方老赢* @Date: 2020/4/3 10:07*/
@Service("accountService")
public class AccountServiceImpl implements IAccountService {@AutowiredIAccountDao accountDao;public List<Account> findAll() {return accountDao.findAll();}public Account find(Integer accountId) {return accountDao.find(accountId);}public void save(Account account) {accountDao.save(account);}public void delete(Integer accountId) {accountDao.delete(accountId);}public void update(Account account) {accountDao.update(account);}}

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