05.基于XML的IOC的案例

作者: 吃伏冒有礼貌 | 来源:发表于2020-02-08 23:58 被阅读0次

1.1 案例准备
新建一个Maven工程,spring02_eesy_02account_xmlioc,在pom.xml中添加一下Dependency,dependecy需要org.springframework,mysql,junit,c3p0,commons-dbutils

<?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.itheima</groupId>
    <artifactId>spring02_eesy_02account_xmlioc</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <!--为了Idea不用每次都要配置java编译版本-->
    <properties>
        <maven.compiler.source>12</maven.compiler.source>
        <maven.compiler.target>12</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.1.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>commons-dbutils</groupId>
            <artifactId>commons-dbutils</artifactId>
            <version>1.4</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.15</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

准备AccountService,AccountDao,Account实体类,AccountServiceImpl,AccountDaoImpl.

准备Account实体类

package com.itheima.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 +
                '}';
    }
}

准备 AccountService 接口

package com.itheima.service;

import com.itheima.domain.Account;

import java.util.List;

public interface IAccountService {

    /**
     * 查询所有账户
     * @return
     */
    List<Account> findAllAccount();

    /**
     * 通过id查询账户
     * @return
     */
    Account findAccountbyId(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);

}

准备 AccountServiceImpl 实现类

package com.itheima.service.impl;

import com.itheima.dao.IAccountDao;
import com.itheima.dao.impl.AccountDaoImpl;
import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import org.springframework.beans.factory.annotation.Autowired;

import java.util.List;

public class AccountServiceImpl implements IAccountService {
    private IAccountDao accountDao;
    public List<Account> findAllAccount() {
        return accountDao.findAllAccount();
    }

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

    public Account findAccountbyId(Integer accountId) {
        return accountDao.findAccountbyId(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);
    }
}

准备 AccountDao 接口

package com.itheima.dao;

import com.itheima.domain.Account;

import java.util.List;

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

    /**
     * 通过id查询账户
     * @return
     */
    Account findAccountbyId(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);
}

准备 AccountDaoImpl 实现类

package com.itheima.dao.impl;

import com.itheima.dao.IAccountDao;
import com.itheima.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;


public class AccountDaoImpl implements IAccountDao {
    private QueryRunner queryRunner;

    public void setQueryRunner(org.apache.commons.dbutils.QueryRunner queryRunner) {
        this.queryRunner = queryRunner;
    }

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

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

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

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

    public void deleteAccount(Integer accountId) {
        try {
            queryRunner.update("delete from account where id = ? ",accountId);
        } catch (SQLException e) {
            throw new RuntimeException();
        }
    }
}

在beans.xml中的配置,需要配置service,dao,数据源,QueryRunner.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns="http://www.springframework.org/schema/beans"
       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.itheima.service.impl.AccountServiceImpl">
        <property name="accountDao" ref="accountDao"></property>
    </bean>
    <!--配置Dao-->
    <bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">
        <!--注入QueryRunner-->
        <property name="queryRunner" ref="runner"></property>
    </bean>
    <!--配置QueryRunner-->
   <!--QueryRunner需要配置为多例模式,避免多个dao使用同一个对象时线程互相干扰-->
      <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 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/eesy"></property>
        <property name="user" value="root"></property>
        <property name="password" value="password"></property>
    </bean>
</beans>

接下来在测试类中测试.创建测试类 AccountServiceTest ,进行测试

package com.itheima.test;

import com.itheima.domain.Account;
import com.itheima.service.IAccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

/**
 * 使用Junit单元测试
 */
public class AccountServiceTest {
    @Test
    public void testFindAll(){
        //获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml") ;
        //获取业务层对象
        IAccountService accountService = (IAccountService) ac.getBean("accountService");
        //执行
        List<Account> accountList = accountService.findAllAccount();
        //打印
        System.out.println(accountList);
    }
    @Test
    public void testFindAccountbyId(){
        //获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml") ;
        //获取业务层对象
        IAccountService accountService = (IAccountService) ac.getBean("accountService");
        //执行
        Account accountbyId = accountService.findAccountbyId(1);
        //打印
        System.out.println(accountbyId);
    }
    @Test
    public void testSaveAccount(){
        //获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml") ;
        //获取业务层对象
        IAccountService accountService = (IAccountService) ac.getBean("accountService");
        Account account = new Account();
        account.setName("xiaohu");
        account.setMoney((float) 900000);
        //执行
        accountService.saveAccount(account);
        //打印
    }
    @Test
    public void testUpdateAccount(){
        //获取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml") ;
        //获取业务层对象
        IAccountService accountService = (IAccountService) ac.getBean("accountService");
        //获取Account
        Account account = accountService.findAccountbyId(6);
        account.setMoney((float) 80000);
        account.setName("langx");
        accountService.updateAccount(account);
        //打印
    }
    @Test
    public void testDeleteAccount(){
        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml") ;
        IAccountService accountService = ac.getBean("accountService",IAccountService.class);
        accountService.deleteAccount(7);
    }

}

05.基于XML的IOC的案例

1.1 案例准备

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