Spring使用XML+註解實現的小案例+Spring-Junit整合

Spring使用XML+註解實現的小案例

項目結構

數據庫

配置文件

pom.xml

<?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.xiaoge</groupId>
    <artifactId>account_xmlioc</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>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.0.2.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>commons-dbutils</groupId>
            <artifactId>commons-dbutils</artifactId>
            <version>1.4</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.13</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>
        </dependency>

    </dependencies>


</project>

bean.xml重點

<?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">


    <!--
       告知spring在創建容器時要掃描的包,
       配置所需要的標籤不是在bean的約束中,
       而是一個名稱爲context名稱空間和約束中
   -->
    <!-- base-package: 指定了包, 它就會掃描這個包下及其子包, 所有類上和接口上的註解 -->
    <context:component-scan base-package="com.xiaoge"></context:component-scan>


    <!-- 配置QueryRunner對象 配置成多例, 單例對象會有線程安全問題 -->
    <bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype">

        <!-- 帶參構造注入數據源 -->
        <constructor-arg name="ds" ref="dataSource"></constructor-arg>

    </bean>

    <!-- 配置數據源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- 注入鏈接數據庫的必備信息 -->
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/eesy"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123456"></property>
    </bean>

</beans>

實體類

Account

package com.xiaoge.domain;

import java.io.Serializable;

/**
 * @Author: 瀟哥
 * @DateTime: 2020/4/7 下午10:16
 * @Description: 賬戶實體類
 */
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 +
                '}';
    }
}

持久層

AccountDao接口

package com.xiaoge.dao;

import com.xiaoge.domain.Account;

import java.util.List;

/**
 * @Author: 瀟哥
 * @DateTime: 2020/4/7 下午10:25
 * @Description: 賬戶的持久層接口
 */
public interface AccountDao {

    /**
     * 查詢所有
     * @return
     */
    public List<Account> findAllAccount();

    /**
     * 查詢一個
     * @return
     */
    public Account findAccountById(Integer id);

    /**
     * 保存
     */
    public void saveAccount(Account account);

    /**
     * 更新
     * @param account
     */
    public void updateAccount(Account account);

    /**
     * 刪除
     * @param id
     */
    public void deleteAccount(Integer id);

}

AccountDaoImpl實體類

package com.xiaoge.dao.impl;

import com.xiaoge.dao.AccountDao;
import com.xiaoge.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;

/**
 * @Author: 瀟哥
 * @DateTime: 2020/4/7 下午10:25
 * @Description: 賬戶的持久層實現類
 */
@Repository("accountDao")
public class AccountDaoImpl implements AccountDao {

    @Autowired
    private QueryRunner runner;

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

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

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

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

業務層

AccountService接口

package com.xiaoge.service;

import com.xiaoge.domain.Account;

import java.util.List;

/**
 * @Author: 瀟哥
 * @DateTime: 2020/4/7 下午10:14
 * @Description: 賬戶的業務層接口
 */
public interface AccountService {

    /**
     * 查詢所有
     * @return
     */
    public List<Account> findAllAccount();

    /**
     * 查詢一個
     * @return
     */
    public Account findAccountById(Integer id);

    /**
     * 保存
     */
    public void saveAccount(Account account);

    /**
     * 更新
     * @param account
     */
    public void updateAccount(Account account);

    /**
     * 刪除
     * @param id
     */
    public void deleteAccount(Integer id);
}

AccountServiceImpl實現類

package com.xiaoge.service.impl;

import com.xiaoge.dao.AccountDao;
import com.xiaoge.domain.Account;
import com.xiaoge.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @Author: 瀟哥
 * @DateTime: 2020/4/7 下午10:14
 * @Description: 賬戶的業務層實現類
 */
@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired  // 它會自動取核心容器(map集合 找值, 鍵都不會匹配的)中找AccountDao類型匹配的唯一個bean, 那就是我們用註解修飾了的@Repository AccountDaoImpl類
    private AccountDao accountDao;

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

    public Account findAccountById(Integer id) {
        return accountDao.findAccountById(id);
    }

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

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

    public void deleteAccount(Integer id) {
        accountDao.deleteAccount(id);
    }
}

測試

AccountServiceTest

package com.xiaoge.test;

import com.xiaoge.domain.Account;
import com.xiaoge.service.AccountService;
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;

import java.util.List;

/**
 * @Author: 瀟哥
 * @DateTime: 2020/4/7 下午10:52
 * @Description: 使用Junit單元測試, 測試我們的配置
 * Spring整合junit的配置
 *      1. 導入spring整合junit的jar(座標)
 *      2. 使用junit提供的一個註解把原有的main方法替換了, 替換成spring提供的
 *          @Runwith
 *      3. 告知spring的運行器, spring和ioc的創建基於xml還是註解的, 並且說明位置
 *          @ContextConfiguration
 *              locations: 指定xml文件的位置, 加上classpath關鍵字, 表示在類路徑下
 *              classes: 指定註解類所在的位置
 *
 * 當我們使用spring 5.x版本的時候, 要求junit的jar必須是4.12及以上版本
 */

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:bean.xml")
public class AccountServiceTest {

    @Autowired
    private AccountService accountService;

    @Test
    public void findAllTest() {
        // 1. 執行方法
        List<Account> allAccount = accountService.findAllAccount();

        for (Account account : allAccount) {
            System.out.println(account);
        }

    }

    @Test
    public void findOneTest() {
        // 1. 執行方法
        Account account = accountService.findAccountById(1);

        System.out.println(account);

    }

    @Test
    public void saveAccountTest() {
        // 1. 構造對象
        Account account = new Account();
        account.setId(4);
        account.setName("ddd");
        account.setMoney(2000f);

        // 2. 執行方法
        accountService.saveAccount(account);

    }

    @Test
    public void updateAccountTest() {
        // 1. 構造對象
        Account account = new Account();
        account.setId(3);
        account.setName("ddd");
        account.setMoney(2000f);

        // 2. 執行方法
        accountService.updateAccount(account);


    }

    @Test
    public void deleteAccountTest() {
        // 1. 執行方法
        accountService.deleteAccount(3);

    }
}

Spring使用XML+註解實現的小案例+Spring-Junit整合

Spring使用XML+註解實現的小案例

項目結構

數據庫

配置文件

實體類

持久層

業務層

測試

[轉帖]cpupower

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Spring使用XML+註解實現的小案例+Spring-Junit整合

模仿spring的核心容器創建單例對象

Spring常用註解(註解對應的XML標籤)

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