JSP+JAVABEAN+SERVLET模式的注冊執行個體實作

MVC模式即Model-View-Controller模式。

Servlet用來處理請求的事務，充當控制器（Controller即C）的角色，Servlet負責響應使用者對業務邏輯的請求并根據使用者的請求行為，決定将哪個JSP頁面發送給客戶。

JSP頁面處于表現層，也就是視力（View即V）的角色。

JavaBean則負責資料的處理，也就是模型（Model即M）的角色。

初始的請求由Servlet來處理，Servlet調用商業邏輯和資料處理代碼，并建立Bean來表示相應的結果（模型）。然後Servlet确定哪個頁面适合于表達這些特定的結果，并将請求轉發到相應的頁面（JSP頁面即為視圖），由Servlet确定哪個業務邏輯适用，應該用哪個JSP頁面相應結果（Servlet就是控制器）。

注冊執行個體：

配置檔案配置SERVLET的調用

/PetStore/WebRoot/WEB-INF/web.xml

<servlet-name>reg</servlet-name>

<servlet-class>cn.wy.CtrlServlet.reg</servlet-class>

</servlet>

<servlet-mapping>

<url-pattern>/reg</url-pattern>

</servlet-mapping>

前端jsp頁面

/PetStore/WebRoot/register.jsp

代碼

<%@ page contentType="text/html; charset=gb2312" language="java" import="cn.wy.Pet.User" errorPage="" %>

<jsp:useBean id="user" scope="page" class="cn.wy.Pet.User"/>

//權限預設不是超級管理者

boolean isAdmin = false ;

String actionStr = "";

if (session.getAttribute("user") != null)

{

user = (User)session.getAttribute("user");

//取出權限

if (user.getUPopedom() ==0)

isAdmin = true ;

}

String qFile = request.getRequestURI();

System.out.println(qFile);

//說明是超級管理者，并在背景添加使用者

if ("/admin/default.jsp".equals(qFile))

actionStr = "../" ;

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>寵物商店會員注冊</title>

<!--

.STYLE1 {

color: #FF0000;

font-weight: bold;

}

.STYLE2 {color: #FF0000}

.STYLE3 {

font-size: 18px;

-->

</style>

</head>

<span class="STYLE3">使用者注冊</span></p>

<tr>

<span class="STYLE1">*</span> 3~16位字母或者數字（如：8hack）</td>

</tr>

<span class="STYLE1">* </span> 3~16位字母或者數字（如：abc123）</td>

<span class="STYLE1">*</span> 必須和上面輸入的密碼相同</td>

<span class="STYLE1">*</span> 找回密碼和聯系用（如：[email protected]）</td>

如（0871-8888888，13888853113）</td>

if (isAdmin)//如果是管理者就顯示出下拉清單

{

<option value="0">超級管理者</option>

</select>

</td>

}else//否則就插入一個蘊藏域

}

<td align="left"><span class="STYLE2">為了友善聯系和管理請認真填寫你的資訊，帶星号的必須填寫</span></td>

&nbsp;&nbsp;&nbsp;&nbsp;

</table>

</form>

</body>

</html>

servlet類

/PetStore/src/cn/wy/CtrlServlet/reg.java

package cn.wy.CtrlServlet;

import cn.wy.DBConnection;

import java.io.*;

import java.sql.*;

import javax.servlet.ServletException;

import javax.servlet.http.*;

// Referenced classes of package cn.wy.CtrlServlet:

// login

public class reg extends HttpServlet

{

public reg()

protected void processRequest(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException

PrintWriter out;

DBConnection dbc=null;

String userName;

String psd;

String email;

String tel;

String address;

int popedom;

response.setContentType("text/html;charset=UTF-8");

out = response.getWriter();

try{

dbc = new DBConnection();

PreparedStatement ps = null;

userName = request.getParameter("userName");

psd = login.encrypt(request.getParameter("password1").toString());

email = request.getParameter("email");

tel = request.getParameter("tel");

address = request.getParameter("address");

popedom = Integer.parseInt(request.getParameter("popedom"));

if (userName != null && psd != null && email != null)

ps = dbc.getCon().prepareStatement("insert into [User](UName,Upass,UEmail,UTel,UAddress,UPopedom) values(?,?,?,?,?,?)");

ps.setString(1, userName);

ps.setString(2, psd);

ps.setString(3, email);

ps.setString(4, tel);

ps.setString(5, address);

ps.setInt(6, popedom);

ps.execute();

System.out.print("新使用者注冊：" + request.getParameter("userName") + " ");

out.print("<script>alert('恭喜您：注冊成功！現已經登入到網站！');history.go(-1)</script>");

if (dbc != null)

dbc.dbClose();

catch(SQLException ex)

out.print("<script>alert('注冊失敗！資料庫連接配接錯誤！');history.go(-1)</script>");

ex.printStackTrace();

protected void doGet(HttpServletRequest request, HttpServletResponse response)

processRequest(request, response);

protected void doPost(HttpServletRequest request, HttpServletResponse response)

public String getServletInfo()

return "Short description";

}

資料庫連接配接類

/PetStore/src/cn/wy/DBConnection.java

package cn.wy;

import java.io.PrintStream;

import java.sql.Connection;

import java.sql.DriverManager;

public class DBConnection

private String mySqlDriver;

private String mySqlUrl;

private String mdbDrStr;

private String mdbUrl;

long time;

private String SQLDRIVER;

private String SQLURL;

public Connection conn;

boolean Conectde;

public DBConnection()

mySqlDriver = "org.gjt.mm.mysql.Driver";

mySqlUrl = "jdbc:mysql://localhost/petstore?user=root&password=5455&useUnicode=true&characterEncoding=8859_1";

mdbDrStr = "sun.jdbc.odbc.JdbcOdbcDriver";

mdbUrl = "jdbc:odbc:pet";

SQLDRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";

SQLURL = "jdbc:sqlserver://127.0.0.1:1433;DatabaseName=PetStore";

conn = null;

Conectde = false;

time = System.currentTimeMillis();

try

Class.forName(SQLDRIVER).newInstance();

if (conn == null)

{

conn = DriverManager.getConnection(SQLURL, "sa", "123456");

Conectde = true;

System.out.print("<");

}

catch (Exception e)

e.printStackTrace();

public Connection getCon()

return conn;

public void dbClose()

if (Conectde)

conn.close();

Conectde = false;

System.out.print(System.currentTimeMillis() - time);

System.out.print("> ");

JavaBean類

/PetStore/src/cn/wy/Pet/User.java

package cn.wy.Pet;

public class User

private int userID;

private String UName;

private String UPass;

private String UEmail;

private String UTel;

private String UAddress;

private String URegDate;

private String ALastTime;

private int UPopedom;

private int UAppearCount;

private int URestoreCount;

private boolean login;

public User()

public boolean isLogin()

return login;

public void setLogin(boolean isLogin)

public void setURestoreCount(int URestoreCount)

this.URestoreCount = URestoreCount;

public int getURestoreCount()

return URestoreCount;

public void setUAppearCount(int UAppearCount)

this.UAppearCount = UAppearCount;

public int getUAppearCount()

return UAppearCount;

public void setUserID(int userID)

this.userID = userID;

public void setUPopedom(int UPopedom)

this.UPopedom = UPopedom;

public void setALastTime(String ALastTime)

this.ALastTime = ALastTime;

public void setURegDate(String URegDate)

this.URegDate = URegDate;

public void setUAddress(String UAddress)

this.UAddress = UAddress;

public void setUTel(String UTel)

this.UTel = UTel;

public void setUEmail(String UEmail)

this.UEmail = UEmail;

public void setUPass(String UPass)

this.UPass = UPass;

public void setUName(String UName)

this.UName = UName;

public int getUserID()

return userID;

public int getUPopedom()

return UPopedom;

public String getALastTime()

return ALastTime;

public String getURegDate()

return URegDate;

public String getUAddress()

return UAddress;

public String getUTel()

return UTel;

public String getUEmail()

return UEmail;

public String getUPass()

return UPass;

public String getUName()

return UName;

本文轉自linzheng 51CTO部落格，原文連結:http://blog.51cto.com/linzheng/1080779

JSP+JAVABEAN+SERVLET模式的注冊執行個體實作

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