SpringCRUD实现账户表的增删改查(配置文件形式)

SpringCRUD实现账户表的增删改查(配置文件形式)

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实现步骤

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                1 独立的实体类 业务层  持久层代码

​                2 持久层技术dbutils(不用mybatis)

​                3 连接池（数据源）dbcp  c3p0

​                4 要求使用junit    测试

​                5  运用xml ioc  实现持久层和业务层解耦

具体实现

1. 注入依赖Maven导入响应的jar文件

   
   
   
     4.0.0
   
     cn.kgc
     springCrud01
     1.0-SNAPSHOT
   
     springCrud01
     
     http://www.example.com
   
     
       UTF-8
       1.8
       1.8
     
   
     
       
         junit
         junit
         4.11
         test
       
       
         mysql
         mysql-connector-java
         5.1.6
       
       
         c3p0
         c3p0
         0.9.1.2
       
       
         commons-dbutils
         commons-dbutils
         1.6
       
       
         org.springframework
         spring-context
         5.0.7.RELEASE
       
     

    

2.  数据库 创建表

   create table account
   (
       id    int auto_increment
           primary key,
       name  varchar(20) null,
       money float       null
   );
   
   INSERT INTO spring.account (id, name, money) VALUES (1, '吕蒙', 33333);
   INSERT INTO spring.account (id, name, money) VALUES (2, '马岱', 44);
   INSERT INTO spring.account (id, name, money) VALUES (3, 'shangjinghua', 29382);
   INSERT INTO spring.account (id, name, money) VALUES (4, '吕布', 34098);
   INSERT INTO spring.account (id, name, money) VALUES (9, '周瑜', 51234);
   INSERT INTO spring.account (id, name, money) VALUES (11, '马超', 235478);

    

3. 实体类

   package cn.kgc.pojo;
   
   public class Account {
       private Integer id;
       private String name;
       private Float money;
   
       public Account() {
       }
   
       public Account(Integer id, String name, Float money) {
           this.id = id;
           this.name = name;
           this.money = 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 +
                   '}';
       }
   }
   

    

4. 持久层

   package cn.kgc.dao;
   
   import cn.kgc.pojo.Account;
   
   import java.util.List;
   
   public interface AccountDao {
       //查询所有
       List findAll();
   
       //根据Id查询
       Account findById(Integer id);
   
       //曾
       void insert(Account account);
   
       //改
       void update(Account account);
   
       //删除
       void delete(Integer id);
   }
   

   package cn.kgc.dao.impl;
   
   import cn.kgc.pojo.Account;
   import cn.kgc.dao.AccountDao;
   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 AccountDao {
       QueryRunner queryRunner;//对象的赋值交给IOC容器
   
       public void setQueryRunner(QueryRunner queryRunner) {
           this.queryRunner = queryRunner;
       }
   
       @Override
       public List findAll() {
           String sql = "select * from account";
           try {
               List accountList = queryRunner.query(sql, new BeanListHandler(Account.class));
               return  accountList;
           } catch (SQLException e) {
               e.printStackTrace();
           }
           return null;
       }
   
       @Override
       public Account findById(Integer id) {
           String sql = "select * from account where id = ?";
           try {
               Account account = queryRunner.query(sql, new BeanHandler(Account.class), id);
               return  account;
           } catch (SQLException e) {
               e.printStackTrace();
           }
           return null;
       }
   
       @Override
       public void insert(Account account) {
           String sql = "insert into account values(null,?,?)";
           try {
               int update = queryRunner.update(sql, account.getName(), account.getMoney());
               if (update != 0) {
                   System.out.println("插入成功");
               }
           } catch (SQLException e) {
               e.printStackTrace();
           }
   
   
       }
   
       @Override
       public void update(Account account) {
           String sql = "update account set name = ? ,money = ? where id = ?";
           try {
               int update = queryRunner.update(sql, account.getName(), account.getMoney(),account.getId());
               if (update != 0) {
                   System.out.println("修改成功");
               }
           } catch (SQLException e) {
               e.printStackTrace();
           }
   
       }
   
       @Override
       public void delete(Integer id) {
           String sql = "delete from account where id = ?";
           try {
               int update = queryRunner.update(sql, id);
               if (update != 0) {
                   System.out.println("删除成功");
               }
           } catch (SQLException e) {
               e.printStackTrace();
           }
       }
   }
   

    

5. 业务层

   package cn.kgc.service;
   
   import cn.kgc.pojo.Account;
   
   import java.util.List;
   
   public interface AccountService {
       //查询所有
       List findAll();
   
       //根据Id查询
       Account findById(Integer id);
   
       //曾
       void insert(Account account);
   
       //改
       void update(Account account);
   
       //删除
       void delete(Integer id);
   }

   package cn.kgc.service.impl;
   
   import cn.kgc.pojo.Account;
   import cn.kgc.dao.AccountDao;
   import cn.kgc.service.AccountService;
   
   import java.util.List;
   
   public class AccountServiceImpl implements AccountService {
       AccountDao accountDao;//对象的初始化由IOc容器负责,同个set方法
   
       public void setAccountDao(AccountDao accountDao) {
           this.accountDao = accountDao;
       }
   
       @Override
       public List findAll() {
           return accountDao.findAll();
       }
   
       @Override
       public Account findById(Integer id) {
           return accountDao.findById(id) ;
       }
   
       @Override
       public void insert(Account account) {
           accountDao.insert(account);
       }
   
       @Override
       public void update(Account account) {
           accountDao.update(account);
       }
   
       @Override
       public void delete(Integer id) {
           accountDao.delete(id);
       }
   }
   

    

6. 配置文件
   1. applicationContext.xml

       

   2. applicationContext-dao.xml

       

7. 测试

   import cn.kgc.pojo.Account;
   import cn.kgc.service.impl.AccountServiceImpl;
   import org.junit.Test;
   import org.springframework.context.support.ClassPathXmlApplicationContext;
   
   import java.util.List;
   
   public class TestSpringCrud {
       @Test
       public void testFindAll(){
   //创建IOC容器,参数指定容器的配置文件
           ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
   //通过容器拿到容器内的对象Service
           AccountServiceImpl as = ac.getBean("accountService", AccountServiceImpl.class);
   //Service对象执行方法
           List accountList = as.findAll();
           for (Account acc : accountList) {
               System.out.println(acc);
           }
       }
       @Test
       public void testFindById(){
           ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
           AccountServiceImpl as = ac.getBean("accountService", AccountServiceImpl.class);
           Account account = as.findById(2);
           System.out.println(account);
       }
       @Test
       public void testInsert(){
           ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
           AccountServiceImpl as = ac.getBean("accountService", AccountServiceImpl.class);
           Account account = new Account();
           account.setName("马超");
           account.setMoney(235478.00f);
          as.insert(account);
          testFindAll();
       }
   
       @Test
       public void testUpdate() {
           ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
           AccountServiceImpl accountService = ac.getBean("accountService", AccountServiceImpl.class);
           Account acc = new Account();
           acc.setMoney(100f);
           acc.setName("鲁肃");
           acc.setId(6);
           accountService.update(acc);
           testFindAll();
       }
       @Test
       public void testDelete(){
           ClassPathXmlApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
           AccountServiceImpl accountService = ac.getBean("accountService", AccountServiceImpl.class);
           accountService.delete(6);
           testFindAll();
       }
   }