Servlet向JSP传值

电玩女神 2022-06-09 05:10 193阅读 0赞

声明：本文转自http://blog.csdn.net/mpfly/article/details/70195671[点击打开链接][Link 1]

**servlet文件**

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1.  package com.mi.servlet;  
2.    
3.  import java.io.IOException;  
4.    
5.    
6.  import java.io.PrintWriter;  
7.    
8.  import javax.servlet.ServletException;  
9.  import javax.servlet.http.HttpServlet;  
10. import javax.servlet.http.HttpServletRequest;  
11. import javax.servlet.http.HttpServletResponse;  
12. import com.mi.beans.\*;  
13. import java.sql.\*;  
14. import java.util.ArrayList;  
15. public class List\_book extends HttpServlet \{  
16.   
17.       
18.     public void doGet(HttpServletRequest request, HttpServletResponse response)  
19.             throws ServletException, IOException \{  
20.         Connection conn = null;  
21.         Statement sta = null;  
22.         ResultSet res = null;  
23.         conn = DBConn.getConn();  
24.         //声明一个ArrayList.用来存放Book类中的数据  
25.         ArrayList**<****Book****>** list = new ArrayList**<****Book****>**();  
26.         try \{  
27.             sta = conn.createStatement();  
28.             String sql = "select \* from book;";  
29.             res = sta.executeQuery(sql);  
30.             while (res.next()) \{  
31.                 //建立了一个实体类,用来存放从数据库中拿到的数据  
32.                 Book book = new Book();  
33.                 book.setName(res.getString("name"));  
34.                 book.setAuthor(res.getString("author"));  
35.                 book.setPrice(res.getString("price"));  
36.                 book.setCountry(res.getString("country"));  
37.                 list.add(book);  
38.             \}  
39.             //将list数据打包  
40.             request.setAttribute("list", list);  
41.               
42.         \} catch (SQLException e) \{  
43.             e.printStackTrace();  
44.         \}  
45.           
46.         //将list数据发送到.jap文件中  
47.         request.getRequestDispatcher("ListBook.jsp").forward(request, response);  
48.     \}  
49.   
50.     public void doPost(HttpServletRequest request, HttpServletResponse response)  
51.             throws ServletException, IOException \{  
52.         doGet(request, response);  
53.     \}  
54.   
55. \}

jsp文件

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1.  **<****strong****>****<****span** style="font-size:18px;"**>****<**%@page import="com.mi.beans.Book"%**>**  
2.  **<**%@ page language="java" import="java.util.\*" pageEncoding="utf-8"%**>**  
3.  **<**%  
4.  String path = request.getContextPath();  
5.  String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
6.  %**>**  
7.    
8.  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"**>**  
9.  **<****html****>**  
10.   **<****head****>**  
11.     **<****base** href="<%=basePath%>"**>**  
12.       
13.     **<****title****>**My JSP 'ListBook.jsp' starting page**</****title****>**  
14.       
15.     **<****meta** http-equiv="pragma" content="no-cache"**>**  
16.     **<****meta** http-equiv="cache-control" content="no-cache"**>**  
17.     **<****meta** http-equiv="expires" content="0"**>**      
18.     **<****meta** http-equiv="keywords" content="keyword1,keyword2,keyword3"**>**  
19.     **<****meta** http-equiv="description" content="This is my page"**>**  
20.       
23.     **<****script****>**  
24.     **</****script****>**  
25.   **</****head****>**  
26.   **<****body****>**  
27.           
28.     **<**%   
29.         ArrayList list = (ArrayList) request.getAttribute("list");  
30.     %**>**  
31.       
32.     **<****h2** align = "center"**>**图书列表**</****h2****>**  
33.     **<****table** border = 1px align = "center"**>**  
34.         **<****tr****>**  
35.             **<****th****>**图书名称**</****th****>**  
36.             **<****th****>**图书作者**</****th****>**  
37.             **<****th****>**图书价格**</****th****>**  
38.             **<****th****>**所属国家**</****th****>**  
39.         **</****tr****>**  
40.           
41.         **<**%  
42.             for(int i = 0;i**<****list.size**();i++)\{  
43.                 Book book =(Book) list.get(i);%**>**  
44.                 **<****tr****>**  
45.                 **<****th****>****<**%=book.getName() %**>****</****th****>**  
46.                 **<****th****>****<**%=book.getAuthor()%**>****</****th****>**  
47.                 **<****th****>****<**%=book.getPrice()%**>****</****th****>**  
48.                 **<****th****>****<**%=book.getCountry()%**>****</****th****>****<****br****>**  
49.                   
50.                   
51.                 **<****th****>****<****a** href="update.jsp?name=**<**%=book.getName()%**>**&author=**<**%=book.getAuthor()%**>**&  
52.                 &country=**<**%=book.getCountry()%**>**&price=**<**%=book.getPrice()%**>**"**>**修改**</****a****>**   
53.                   
54.                 **<****a** href="Delete\_Servlet?de\_name=<%=book.getName()%>" onclick="confirm('确定删除该条记录?')"**>**删除**</****a****>**  
55.                 **</****th****>**  
56.         **<**% \}  
57.          %**>**  
58.     **</****table****>**  
59.   **</****body****>**  
60. **</****html****>****</****span****>****</****strong****>****<****span** style="font-size:24px;"**>**  
61. **</****span****>**  
62.

[Link 1]: http://blog.csdn.net/mpfly/article/details/70195671
[view plain]: http://blog.csdn.net/mpfly/article/details/70195671#