commons-dbutils实现增删改查

1、maven依赖

<?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.ly.spring</groupId>
    <artifactId>spring03</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>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>commons-dbutils</groupId>
            <artifactId>commons-dbutils</artifactId>
            <version>1.6</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>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

2、实体类

package com.ly.spring.domain;

import java.io.Serializable;

public class Account implements Serializable {
    private Integer id;
    private Integer uid;
    private double money;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public Integer getUid() {
        return uid;
    }

    public void setUid(Integer uid) {
        this.uid = uid;
    }

    public double getMoney() {
        return money;
    }

    public void setMoney(double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", uid=" + uid +
                ", money=" + money +
                '}';
    }
}

3、Service接口

package com.ly.spring.service;

import com.ly.spring.domain.Account;

import java.sql.SQLException;
import java.util.List;

public interface IAccountService {
    public List<Account> findAll() throws SQLException;
    public Account findOne(Integer id) throws SQLException;
    public void save(Account account) throws SQLException;
    public void update(Account account) throws SQLException;
    public void delete(Integer id) throws SQLException;
}

4、Service实现类

package com.ly.spring.service.impl;

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

import java.sql.SQLException;
import java.util.List;

@Service("accountService")
public class AccountServiceImpl implements IAccountService {
    @Autowired
    private IAccountDao accountDao;
    public List<Account> findAll() throws SQLException {
        return accountDao.findAll();
    }

    @Override
    public Account findOne(Integer id) throws SQLException {
        return accountDao.findOne(id);
    }

    @Override
    public void save(Account account) throws SQLException {
        accountDao.save(account);
    }

    @Override
    public void update(Account account) throws SQLException {
        accountDao.update(account);
    }

    @Override
    public void delete(Integer id) throws SQLException {
        accountDao.delete(id);
    }
}

5、Dao接口

package com.ly.spring.dao;

import com.ly.spring.domain.Account;

import java.sql.SQLException;
import java.util.List;

public interface IAccountDao {
    public List<Account> findAll() throws SQLException;
    public Account findOne(Integer id) throws SQLException;
    public void save(Account account) throws SQLException;
    public void update(Account account) throws SQLException;
    public void delete(Integer id) throws SQLException;
}

6、Dao实现类

package com.ly.spring.dao.impl;

import com.ly.spring.dao.IAccountDao;
import com.ly.spring.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("accountDao")
public class AccountDaoImpl implements IAccountDao {
    @Autowired
    private QueryRunner queryRunner;
    public List<Account> findAll() throws SQLException {
        return queryRunner.query("select * from account",new BeanListHandler<Account>(Account.class));
    }

    @Override
    public Account findOne(Integer id) throws SQLException {
        return queryRunner.query("select * from account where id = ?",new BeanHandler<Account>(Account.class),id);
    }

    @Override
    public void save(Account account) throws SQLException {
        queryRunner.update("insert into account(uid,money) values(?,?)",account.getUid(),account.getMoney());
    }

    @Override
    public void update(Account account) throws SQLException {
        queryRunner.update("update account set money = ? where id = ?",account.getMoney(),account.getId());
    }

    @Override
    public void delete(Integer id) throws SQLException {
        queryRunner.update("delete from account where id = ?",id);
    }
}

7、测试类

package com.ly.spring.test;
import com.ly.spring.domain.Account;
import com.ly.spring.service.IAccountService;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.sql.SQLException;
import java.util.List;

public class MainTest {
    private ApplicationContext context;
    private IAccountService accountService;
    @Before
    public void init() {
        context = new ClassPathXmlApplicationContext("bean.xml");
        accountService = context.getBean("accountService", IAccountService.class);
    }
    @Test
    public void findAll() throws SQLException {
        List<Account> accounts = accountService.findAll();
        System.out.println(accounts);
    }

    @Test
    public void findOne() throws SQLException {
        Account account = accountService.findOne(3);
        System.out.println(account);
    }

    @Test
    public void save() throws SQLException {
        Account account = new Account();
        account.setUid(51);
        account.setMoney(8000);
        accountService.save(account);
    }

    @Test
    public void update() throws SQLException {
        Account account = new Account();
        account.setId(4);
        account.setMoney(100000);
        accountService.update(account);
    }
    @Test
    public void delete() throws SQLException {
        accountService.delete(4);
    }
}

8、spring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"
       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">
    <!--配置注解扫描包-->
    <context:component-scan base-package="com.ly.spring"></context:component-scan>
    <!--引入外部properties文件-->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
    <!--配置QueryRunner并注入数据源-->
    <bean id="queryRunner" class="org.apache.commons.dbutils.QueryRunner">
        <constructor-arg name="ds" ref="dataSource"></constructor-arg>
    </bean>
    <!--配置c3p0数据源并注入相关属性-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
</beans>

9、数据库配置文件

jdbc.url = jdbc:mysql://localhost:3306/db01
jdbc.driver = com.mysql.jdbc.Driver
jdbc.user = root
jdbc.password = root