1 package util;
2
3 import java.sql.Connection;
4
5 public interface MyConnection {
6     public Connection getConnection();
7 }

 1 package util;
 2
 3 import java.sql.Connection;
 4 import java.sql.DriverManager;
 5
 6 public class MyConnection_sqlserver implements MyConnection {
 7      9     // 第一步：获取数据连接，让appliction server能够与db server进行交互
10     private String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
11     private String url = "jdbc:sqlserver://localhost:1433;DatabaseName=CardDB";
12     private String name = "sa";
13     private String pwd = "123456";
14     private Connection conn = null;
15
16     @Override
17     public Connection getConnection() {
18         try {
19             Class.forName(driver);
20         } catch (ClassNotFoundException e) {
21             System.out.println( e.getMessage() );
22         }
23         try{
24             conn = DriverManager.getConnection(url, name, pwd);
25         }
26         catch(Exception e){
27             System.out.println("获取数据库连接时有异常："+e.getMessage());
28         }
29         return conn;
30     }
31
32 }

 1 package dao;
 2
 3 import java.sql.Connection;
 4 import java.sql.PreparedStatement;
 5 import java.sql.ResultSet;
 6 import java.util.ArrayList;
 7 import java.util.List;
 8
 9 import entity.BookCard;
10 import util.MyConnection;
11
12 public class BookCardDaoImpl implements BookCardDao {
13
14     private MyConnection c;
15
16     public void setC(MyConnection c) {
17         this.c = c;
18     }

1 public class BookCardDaoImpl implements BookCardDao {
2
3     MyConnection c = new MyConnection_sqlserver();

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4         xmlns:p="http://www.springframework.org/schema/p"
 5         xmlns:aop="http://www.springframework.org/schema/aop"
 6         xmlns:context="http://www.springframework.org/schema/context"
 7         xmlns:jee="http://www.springframework.org/schema/jee"
 8         xmlns:tx="http://www.springframework.org/schema/tx"
 9         xsi:schemaLocation="
10             http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd
11             http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
12             http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
13             http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.2.xsd
14             http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">
15
20     <bean id="myDao1" class="dao.BookCardDaoImpl" scope="prototype">
21         <property name="c" ref="myConnection1"></property>
22     </bean>
23
28     <bean id="myConnection1" class="util.MyConnection_mysql" scope="prototype"></bean>
29
30     <bean id="myConnection2" class="util.MyConnection_sqlserver" scope="prototype"></bean>
31
32 </beans>
33