1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5
 6 <struts>
 7     <!-- 告知Struts2运行时使用Spring来创建对象 -->
 8     <constant name="struts.objectFactory" value="spring" />
 9     <package name="001pck" extends="struts-default">
10         <action name="Index" class="myIndexAction">
11             <result name="success">/WEB-INF/jsp/index.jsp</result>
12         </action>
13
14     </package>
15 </struts>

 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     <!-- 类似于财务部门一样，类就是钱，所有需要类的实例都由srping去管理, pojo除外-->
16     <bean id="myIndexAction" class="action.IndexAction" scope="prototype">
17         <property name="index" ref="myService1"></property>
18     </bean>
19     <!-- index = new IndexServiceImpl() -->
20     <bean id="myDao1" class="dao.BookCardDaoImpl" scope="prototype">
21         <property name="c" ref="myConnection1"></property>
22     </bean>
23
24     <bean id="myService1" class="service.IndexServiceImpl" scope="prototype">
25         <property name="bcd" ref="myDao1"></property>
26     </bean>
27
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>

 1 public class BookCardDaoImpl implements BookCardDao {
 2
 3     //只做属性的申明,不写死具体的实现
 4     private MyConnection c;
 5
 6     //提供一个set方法spring会自动注入
 7     public void setC(MyConnection c) {
 8         this.c = c;
 9     }
10
11     @Override
12     public List<BookCard> getAllCardInfo() {
13
14         // 第一步：获取数据库连接
15         Connection conn = c.getConnection();
16
17         // 第二步：查询数据库
18         // （操作JDBC，需要sql语句，需要执行sql语句对象，需要执行sql语句后结果集合）
19         String sql = "select * from BookCard";// 需要执行的sql语句
20         PreparedStatement stmt = null;// 执行sql语句对象
21         ResultSet rs = null;// 执行sql语句后的结果集
22         try {
23             stmt = conn.prepareStatement(sql);
24             rs = stmt.executeQuery();
25         } catch (Exception e) {
26             e.printStackTrace();
27         }
28
29         // 第三步
30         // 拿到rs后，执行一个遍历以及封装
31         List<BookCard> myBookCardList = new ArrayList<BookCard>();
32         try {
33             while (rs.next()) {
34                 // 风格：实体类是一个pojo对象，一般直接new就行
35                 BookCard bc = new BookCard();
36                 // 进行数据库封装
37                 bc.setCid(rs.getInt("cid"));
38                 bc.setName(rs.getString("name"));
39                 bc.setSex(rs.getString("sex"));
40                 bc.setCardDate(rs.getDate("cardDate"));
41                 bc.setDeposit(rs.getBigDecimal("deposit"));
42                 myBookCardList.add(bc);
43             }
44         } catch (Exception e1) {
45             e1.printStackTrace();
46         }
47
48         //关闭资源
49         try {
50             rs.close();
51             stmt.close();
52             conn.close();
53         } catch (Exception e) {
54             e.printStackTrace();
55         }
56
57         // 第5步返回结果集List给客户端
58         return myBookCardList;
59     }