service层和impl

最新推荐文章于 2025-04-27 01:36:18 发布

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最新推荐文章于 2025-04-27 01:36:18 发布

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文章标签： java servlet jvm

本文链接：https://blog.youkuaiyun.com/weixin_71819778/article/details/127351880

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service层：管理具体的功能的接口，具体业务逻辑层

package com.nz.service;
import java.util.List;
import com.nz.entity.BankAccount;
public interface JDBCService {
   //查
   public List<BankAccount> JDBCQuery();
   //新增
   public boolean JDBCAdd(BankAccount bankAccount);
   //新增后查询
   public List<BankAccount> JDBCAddQuery(BankAccount bankAccount);
   }

impl层：是继承service，dao层具体的实现类

package com.nz.service.impl;
import java.sql.Connection;
import java.util.ArrayList;
import java.util.List;
import com.nz.dao.JDBCDao;
import com.nz.entity.BankAccount;
import com.nz.service.JDBCService;
import com.nz.util.MySQLDriverUtil;
public class JDBCServiceImpl implements JDBCService{
   //创建对象
   JDBCDao jdbcDao = new JDBCDao();
   @Override
   public List<BankAccount> JDBCQuery() {
       //初始化反参
       List<BankAccount> list = new ArrayList<BankAccount>();
       //查
       try {
           list = jdbcDao.JDBCSelect();
           //尝试获取连接
           Connection connection = MySQLDriverUtil.getConnect();
           //关闭流
           MySQLDriverUtil.flowClose(connection);
           } catch (Exception e) {
               e.printStackTrace();
               }
       return list;
       }
       //新增
   public boolean JDBCAdd(BankAccount bankAccount) {
       try {
           boolean bl = jdbcDao.JDBCInsert(bankAccount);
           //尝试获取连接
           Connection connection = MySQLDriverUtil.getConnect();
           //关闭流
           MySQLDriverUtil.flowClose(connection);
           return true;
           } catch (Exception e) {
               e.printStackTrace();
           }
       return false;
       }
       @Override
       public List<BankAccount> JDBCAddQuery(BankAccount bankAccount) {
           try {
               boolean bl = jdbcDao.JDBCInsert(bankAccount);
               List<BankAccount> list = jdbcDao.JDBCSelect();
               return list;
               } catch (Exception e) {
                   e.printStackTrace();
                   }finally{
                       //尝试获取连接
                       Connection connection = MySQLDriverUtil.getConnect();
                       //关闭流
                       MySQLDriverUtil.flowClose(connection);
                       }
           return null;
       }
   }