Spring5（4）- 基於xml配置的小案例

1 實體類

package com.tzb.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 +
                '}';
    }
}

2 DAO

package com.tzb.dao;

import com.tzb.domain.Account;

import java.util.List;

public interface IAccountDao {
    void saveAccount(Account account);

    void updateAccount(Account account);

    void deleteAccount(Integer accountId);

    Account findAccountById(Integer accountId);

    List<Account> findAllAccount();
}

---

• DAO 實現類

package com.tzb.dao.impl;

import com.tzb.dao.IAccountDao;
import com.tzb.domain.Account;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.util.List;


public class AccountDaoImpl implements IAccountDao {

    private QueryRunner runner;

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

    @Override
    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);
        }
    }

    @Override
    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);
        }
    }

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

3 Service

package com.tzb.service;

import com.tzb.domain.Account;

import java.util.List;

public interface IAccountService {

    void saveAccount(Account account);

    void updateAccount(Account account);

    void deleteAccount(Integer accountId);

    Account findAccountById(Integer accountId);

    List<Account> findAllAccount();
}

---

• Service實現類

package com.tzb.service.impl;

import com.tzb.dao.IAccountDao;
import com.tzb.domain.Account;
import com.tzb.service.IAccountService;


import java.util.List;


public class AccountServiceImpl implements IAccountService {

    private IAccountDao accountDao;

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

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

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

    @Override
    public void deleteAccount(Integer accountId) {
        accountDao.deleteAccount(accountId);
    }

    @Override
    public Account findAccountById(Integer accountId) {
       return accountDao.findAccountById(accountId);
    }

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

4 bean.xml

<?xml version="1.0" encoding="UTF-8"?>

<!--導入 spring 約束-->
<!--基於註解的IOC配置需要導入 context 名稱空間-->
<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">

    <bean id="accountService" class="com.tzb.service.impl.AccountServiceImpl">
        <!--注入 DAO-->
        <property name="accountDao" ref="accountDao"></property>
    </bean>

    <bean id="accountDao" class="com.tzb.dao.impl.AccountDaoImpl">
        <property name="runner" ref="runner"></property>
    </bean>

    <!--此時是一個多例對象-->
    <bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype">
        <!--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">
        <!--連接數據庫的信息-->
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/spring5?userSSL=false"></property>
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
    </bean>

</beans>

5 單元測試

package com.tzb.test;


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

import java.util.List;

public class AccountServiceTest {

    @Test
    public void testFindAll(){
        // 獲取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");

        IAccountService as = ac.getBean("accountService", AccountServiceImpl.class);

        List<Account> accounts = as.findAllAccount();
        System.out.println(accounts);
    }

    @Test
    public void testFindOne(){
        // 獲取容器
        ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml");

        IAccountService as = ac.getBean("accountService", AccountServiceImpl.class);

        Account account = as.findAccountById(1);
        System.out.println(account);
    }

    @Test
    public void testSave(){

    }

    @Test
    public void testUpdate(){

    }
}