单表CRUD-半注解

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<?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>example</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>jar</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>commons-dbutils</groupId>
            <artifactId>commons-dbutils</artifactId>
            <version>1.7</version>
        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.200</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>alimaven</id>
            <name>aliyun maven</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
            <releases>
                <enabled>true</enabled>
            </releases>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>14</java.version>
        <maven.compiler.source>14</maven.compiler.source>
        <maven.compiler.target>14</maven.compiler.target>
        <encoding>UTF-8</encoding>
    </properties>

</project>
<?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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd">
    <context:component-scan base-package="com.example"/>

    <!--配置dao-->
    <bean id="accountDao" class="com.example.dao.impl.AccountDaoImpl">
        <property name="runner" ref="runner"></property>
    </bean>
    <!--配置QueryRunner-->
    <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>
    <!--配置数据源-->
    <bean name="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="org.h2.Driver"></property>
        <property name="jdbcUrl" value="jdbc:h2:file:~/.h2/h2"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123456"></property>
     </bean>
</beans>

代码：

package com.example.domain;

import java.io.Serializable;

/**
 * 账户的实现类
 */
public class Account implements Serializable {
    private int id;
    private String name;
    private float money;

    public Account() {}
    public Account(String name, int money) {
        this.name=name;
        this.money=money;
    }

    public Account(int id, String ddd, int i1) {
        this.id=id;
        this.name=name;
        this.money=money;
    }

    public int getId() {
        return id;
    }

    public void setId(int 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 +
                ‘}‘;
    }
}
package com.example.service;

import com.example.domain.Account;

import java.util.List;

/**
 * 账户的业务层接口
 */
public interface IAccountService {
    /**
     * 查询所有
     * @return
     */
    List<Account> findAllAccount();

    /**
     * 查询一个
     * @param id
     * @return
     */
    Account findAccountById(int id);

    /**
     * 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 id
     */
    void deleteAccount(int id);

}
package com.example.service.impl;

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

import java.util.List;
@Service("accountService")
public class AccountServiceImpl implements IAccountService {
    @Autowired
    private IAccountDao accountDao;

    public IAccountDao getAccountDao() {
        return accountDao;
    }

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

    @Override
    public List<Account> findAllAccount() {
        return accountDao.findAllAccount();
    }

    @Override
    public Account findAccountById(int id) {
        return accountDao.findAccountById(id);
    }

    @Override
    public void saveAccount(Account account) {
        accountDao.saveAccount(account);
    }

    @Override
    public void updateAccount(Account account) {
        accountDao.updateAccount(account);
    }

    @Override
    public void deleteAccount(int id) {
        accountDao.deleteAccount(id);
    }
}
package com.example.dao;

import com.example.domain.Account;

import java.util.List;

/**
 * 账户的持久层接口
 */
public interface IAccountDao {
    /**
     * 查询所有
     * @return
     */
    List<Account> findAllAccount();

    /**
     * 查询一个
     * @param id
     * @return
     */
    Account findAccountById(int id);

    /**
     * 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 id
     */
    void deleteAccount(int id);
}
package com.example.dao.impl;

import com.example.dao.IAccountDao;
import com.example.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.context.annotation.Scope;
import org.springframework.stereotype.Repository;

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

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

    public QueryRunner getRunner() {
        return runner;
    }

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

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

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

    @Override
    public void saveAccount(Account account) {
        try {
             runner.update("insert into account(name,money)values(?,?)",account.getName(),account.getMoney());
        } catch (SQLException throwables) {
            throw new RuntimeException(throwables);
        }
    }

    @Override
    public void updateAccount(Account account) {
        try {
            runner.update("update account set name = ? ,money = ? where id = ?",account.getName(),account.getMoney(),account.getId());
        } catch (SQLException throwables) {
            throw new RuntimeException(throwables);
        }
    }

    @Override
    public void deleteAccount(int id) {
        try {
            runner.update("delete account where id = ?",id);
        } catch (SQLException throwables) {
            throw new RuntimeException(throwables);
        }
    }
}

测试：

package com.example;

import com.example.domain.Account;
import com.example.service.IAccountService;
import org.junit.Before;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

/**
 * 使用junit单元测试，测试我们的配置
 */
public class AccountServiceTest {


    IAccountService as;

    @Before
    public void setUp() throws Exception {
        //1. 获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");
        //2. 获取业务层对象
         as = ac.getBean("accountService",IAccountService.class);
    }

    @Test
    public void testFindAll() {
        List<Account> accounts = as.findAllAccount();
        for(Account account : accounts){
            System.out.println(account);
        }
    }
    @Test
    public void testFindOne() {
        Account account=as.findAccountById(1);
        System.out.println(account);
    }
    @Test
    public void testSave() {
        Account account=new Account("ddd",100);
        as.saveAccount(account);
    }
    @Test
    public void testUpdate() {
        Account account=new Account(2,"ddd",100);
        as.updateAccount(account);
    }
    @Test
    public void testDelete() {
        as.deleteAccount(1);
    }
}

 

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