Spring基于注解加xml配置的IoC实现的CRUD

2023-06-20 75

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简介： Spring基于注解加xml配置的IoC实现的CRUD

Spring中基于注解配置IOC的CRUD

使用 DBAssit 作为持久层解决方案

使用 c3p0 数据源

创建数据库和编写实体类

create table account(
  id int primary key auto_increment,
  name varchar(40),
  money float
)character set utf8 collate utf8_general_ci;
insert into account(name,money) values('aaa',1000);
insert into account(name,money) values('bbb',1000);
insert into account(name,money) values('ccc',1000);

Account类

package com.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 +
                '}';
    }
}

导入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</groupId>
    <artifactId>spring</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.3.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>5.1.6</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>
</project>

编写持久层代码

IAccountDao接口

package com.dao;
import com.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
     * @return
     */
    Account findAccountById(Integer accountId);
    /**
     * 保存
     * @param account
     */
    void saveAccount(Account account);
    /**
     * 更新
     * @param account
     */
    void updateAccount(Account account);
    /**
     * 删除
     * @param acccountId
     */
    void deleteAccount(Integer acccountId);
}

IAccountDao接口实现类AccountDaoImpl

package dao.IMPL;
import dao.IAccountDao;
import 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;
/**
 * 账户的持久层实现类
 */
@Repository
public class AccountDaoImpl implements IAccountDao {
    @Autowired
    private QueryRunner runner;
    public void setRunner(QueryRunner runner) {
        this.runner = runner;
    }
    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 findAccountById(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);
        }
    }
//    @Override
    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);
        }
    }
//    @Override
    public void deleteAccount(Integer accountId) {
        try{
            runner.update("delete from account where id=?",accountId);
        }catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

编写业务层代码

IAccountService 接口

package com.service;
import com.domain.Account;
import java.util.List;
/**
 * 账户业务层的接口
 */
public interface IAccountService {
    /**
     * 查询所有
     * @return
     */
    List<Account> findAllAccount();
    /**
     * 查询一个
     * @return
     */
    Account findAccountById(Integer accountId);
    /**
     * 保存
     * @param account
     */
    void saveAccount(Account account);
    /**
     * 更新
     * @param account
     */
    void updateAccount(Account account);
    /**
     * 删除
     * @param acccountId
     */
    void deleteAccount(Integer acccountId);
}

IAccountService 接口实现类AccountServiceImpl

package Service.IMPL;
import Service.IAccountService;
import dao.IAccountDao;
import domain.Account;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
 * 账户的业务层实现类
 */
@Service
public class AccountServiceImpl implements IAccountService {
    @Autowired
    private IAccountDao accountDao;
    public void setAccountDao(IAccountDao accountDao) {
        this.accountDao = accountDao;
    }
//    @Override
    public List<Account> findAllAccount() {
        return accountDao.findAllAccount();
    }
//    @Override
    public Account findAccountById(Integer accountId) {
        return accountDao.findAccountById(accountId);
    }
//    @Override
    public void saveAccount(Account account) {
        accountDao.saveAccount(account);
    }
//    @Override
    public void updateAccount(Account account) {
        accountDao.updateAccount(account);
    }
//    @Override
    public void deleteAccount(Integer acccountId) {
        accountDao.deleteAccount(acccountId);
    }
}

创建并编写配置文件bean.xml

<?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">
    <!-- 告知spring在创建容器时要扫描的包 -->
    <context:component-scan base-package="dao"></context:component-scan>
    <context:component-scan base-package="domain"></context:component-scan>
    <context:component-scan base-package="Service"></context:component-scan>
    <!--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 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/test"></property>
        <property name="user" value="root"></property>
        <property name="password" value="123"></property>
    </bean>
</beans>

测试类代码

AccountServiceTest.java

import com.domain.Account;
import com.service.IAccountService;
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;
/**
 * 使用Junit单元测试：测试我们的配置
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:bean.xml")
public class AccountServiceTest {
    @Autowired
    private IAccountService as;
    @Test
    public void testFindAll() {
        //3.执行方法
        List<Account> accounts = as.findAllAccount();
        for(Account account : accounts){
            System.out.println(account);
        }
    }
    @Test
    public void testFindOne() {
        //3.执行方法
        Account account = as.findAccountById(1);
        System.out.println(account);
    }
    @Test
    public void testSave() {
        Account account = new Account();
        account.setName("test");
        account.setMoney(12345f);
        //3.执行方法
        as.saveAccount(account);
    }
    @Test
    public void testUpdate() {
        //3.执行方法
        Account account = as.findAccountById(4);
        account.setMoney(23456f);
        as.updateAccount(account);
    }
    @Test
    public void testDelete() {
        //3.执行方法
        as.deleteAccount(4);
    }
}