Jsp+Servlet+JavaBean实现用户注册

涓嬮潰鏄楠わ紝鏈夐渶瑕佺殑鍙互鍙傝€冩簮鐮侊細

1銆傚垱寤洪」鐩紝缂栧啓bean

public class UserBean {
	private String name;            //瀹氫箟鐢ㄦ埛鍚?	private String password;       //瀹氫箟瀵嗙爜
	private String email;           //瀹氫箟閭
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}
}
           

2銆傚垱寤虹被灏佽娉ㄥ唽琛ㄥ崟淇℃伅锛屽苟涓旈獙璇佽〃鍗曚俊鎭?

import java.util.HashMap;
 import java.util.Map;
 public class RegisterFormBean {
 	private String name;            //瀹氫箟鐢ㄦ埛鍚? 	private String password;       //瀹氫箟瀵嗙爜
 	private String password2;      //瀹氫箟纭瀵嗙爜
 	private String email;           //瀹氫箟閭
      // 瀹氫箟鎴愬憳鍙橀噺errors,鐢ㄤ簬灏佽琛ㄥ崟楠岃瘉鏃剁殑閿欒淇℃伅
 	private Map<String, String> errors = new HashMap<String, String>();
 	public String getName() {
 		return name;
 	}
 	public void setName(String name) {
 		this.name = name;
 	}
 	public String getPassword() {
 		return password;
 	}
 	public void setPassword(String password) {
 		this.password = password;
 	}
 	public String getPassword2() {
 		return password2;
 	}
 	public void setPassword2(String password2) {
 		this.password2 = password2;
 	}
 	public String getEmail() {
 		return email;
 	}
 	public void setEmail(String email) {
 		this.email = email;
 	}
 	public boolean validate() {
 		boolean flag = true;
 		if (name == null || name.trim().equals("")) {
 			errors.put("name", "璇疯緭鍏ュ鍚?");
 			flag = false;
 		}
 		if (password == null || password.trim().equals("")) {
 			errors.put("password", "璇疯緭鍏ュ瘑鐮?");
 			flag = false;
 		} else if (password.length() > 12 || password.length() < 6) {
 			errors.put("password", "璇疯緭鍏?-12涓瓧绗?");
 			flag = false;
 		}
 		if (password != null && !password.equals(password2)) {
 			errors.put("password2", "涓ゆ杈撳叆鐨勫瘑鐮佷笉鍖归厤.");
 			flag = false;
 		}
 		// 瀵筫mail鏍煎紡鐨勬牎楠岄噰鐢ㄤ簡姝ｅ垯琛ㄨ揪寮? 		if (email == null || email.trim().equals("")) {
 			errors.put("email", "璇疯緭鍏ラ偖绠?");
 			flag = false;
 		} else if (!email.matches("[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+")) {
 			errors.put("email", "閭鏍煎紡閿欒.");
 			flag = false;
 		}
 		return flag;
 	}
     // 鍚慚ap闆嗗悎errors涓坊鍔犻敊璇俊鎭? 	public void setErrorMsg(String err, String errMsg) {
 		if ((err != null) && (errMsg != null)) {
 			errors.put(err, errMsg);
 		}
 	}
     // 鑾峰彇errors闆嗗悎
      public Map<String, String> getErrors() {
 		return errors;
 	}
 }
           

3銆傚垱寤哄伐鍏风被DBUtil锛屾ā鎷熸暟鎹簱

import java.util.HashMap;
import cn.itcast.chapter11.model2.domain.UserBean;
public class DBUtil {
private static DBUtil instance = new DBUtil();   //
// 瀹氫箟users闆嗗悎锛岀敤浜庢ā鎷熸暟鎹簱
private HashMap<String,UserBean> users = new HashMap<String,UserBean>();
	private DBUtil() {
		// 鍚戞暟鎹簱(users)涓瓨鍏ヤ袱鏉℃暟鎹?		UserBean user1 = new UserBean();
		user1.setName("Jack");
		user1.setPassword("12345678");
		user1.setEmail("[email聽protected]");
		users.put("Jack ",user1);
		
		UserBean user2 = new UserBean();
		user2.setName("Rose");
		user2.setPassword("abcdefg");
		user2.setEmail("[email聽protected]");
		users.put("Rose ",user2);			
	}
	public static DBUtil getInstance()	{
		return instance;
	}
	// 鑾峰彇鏁版嵁搴?users)涓殑鏁版嵁
	public UserBean getUser(String userName) {
		UserBean user = (UserBean) users.get(userName);
		return user;
	}
	// 鍚戞暟鎹簱(users)鎻掑叆鏁版嵁
	public boolean insertUser(UserBean user) {
		if(user == null) {
			return false;
		}
		String userName = user.getName();
		if(users.get(userName) != null) {
			return false;
		}
		users.put(userName,user);
		return true;
	}
}
           

4銆傚垱寤簊ervlet锛岀敤浜庤鍥炬帶鍒躲€?

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.itcast.chapter11.model2.domain.RegisterFormBean;
import cn.itcast.chapter11.model2.domain.UserBean;
import cn.itcast.chapter11.model2.util.DBUtil;
public class ControllerServlet extends HttpServlet {
	public void doGet(HttpServletRequest request,
	HttpServletResponse response) throws ServletException, IOException {
		this.doPost(request, response);
	}
	public void doPost(HttpServletRequest request,
	HttpServletResponse response) throws ServletException, IOException {
        response.setHeader("Content-type", "text/html;charset=GBK");  
		response.setCharacterEncoding("GBK");
		// 鑾峰彇鐢ㄦ埛娉ㄥ唽鏃惰〃鍗曟彁浜ょ殑鍙傛暟淇℃伅
		String name = request.getParameter("name");
		String password=request.getParameter("password");
		String password2=request.getParameter("password2");
		String email=request.getParameter("email");
		// 灏嗚幏鍙栫殑鍙傛暟灏佽鍒版敞鍐岃〃鍗曠浉鍏崇殑RegisterFormBean绫讳腑
		RegisterFormBean formBean = new RegisterFormBean();
		formBean.setName(name);
		formBean.setPassword(password); 
		formBean.setPassword2(password2);
		formBean.setEmail(email);
		// 楠岃瘉鍙傛暟濉啓鏄惁绗﹀悎瑕佹眰锛屽鏋滀笉绗﹀悎锛岃浆鍙戝埌register.jsp閲嶆柊濉啓
		if(!formBean.validate()){
			request.setAttribute("formBean", formBean);
			request.getRequestDispatcher("/register.jsp").forward(request, response);
			return;
		}
		// 鍙傛暟濉啓绗﹀悎瑕佹眰锛屽垯灏嗘暟鎹皝瑁呭埌UserBean绫讳腑
		UserBean userBean = new UserBean();
		userBean.setName(name);
		userBean.setPassword(password);
		userBean.setEmail(email);
        // 璋冪敤DBUtil绫讳腑鐨刬nsertUser()鏂规硶鎵ц娣诲姞鎿嶄綔锛屽苟杩斿洖涓€涓猙oolean绫诲瀷鐨勬爣蹇?		boolean b = DBUtil.getInstance().insertUser(userBean);
        // 濡傛灉杩斿洖涓篺alse锛岃〃绀烘敞鍐岀殑鐢ㄦ埛宸插瓨鍦紝鍒欓噸瀹氬悜鍒皉egister.jsp閲嶆柊濉啓
		if(!b){
			request.setAttribute("DBMes", "浣犳敞鍐岀殑鐢ㄦ埛宸插瓨鍦?);
              request.setAttribute("formBean", formBean);
		     request.getRequestDispatcher("/register.jsp").forward(request, response);
			return;
		}
		response.getWriter().print("鎭枩浣犳敞鍐屾垚鍔燂紝3绉掗挓鑷姩璺宠浆");
		// 灏嗘垚鍔熸敞鍐岀殑鐢ㄦ埛淇℃伅娣诲姞鍒癝ession涓?		request.getSession().setAttribute("userBean", userBean);
		// 娉ㄥ唽鎴愬姛鍚庯紝3绉掕烦杞埌鐧诲綍鎴愬姛椤甸潰loginSuccess.jsp
		response.setHeader("refresh", "3;url=loginSuccess.jsp");
	}
}
           

5銆傚父瑙佹敞鍐岄〉闈紝璇锋眰鎻愪氦缁檚ervlet

<%@ page language="java" pageEncoding="GBK"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 
Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
    <title>鐢ㄦ埛娉ㄥ唽</title>
    <style type="text/css">
        h3 {
	        margin-left: 100px;
        }
        #outer {
	        width: 750px;
        }
        span {
	        color: #ff0000
        }
        div {
             height:20px;
	        margin-bottom: 10px;
        }
        .ch {
	        width: 80px;
	        text-align: right;
	        float: left;
        }
        .ip {
	        width: 500px;
	        float: left
        }
        .ip>input {
	        margin-right: 20px
        }
        #bt {
	        margin-left: 50px;
        }
        #bt>input {
	        margin-right: 30px;
        }
    </style>
</head>
<body>
	    <form action="ControllerServlet" method="post">
		    <h3>鐢ㄦ埛娉ㄥ唽</h3>
		    <div id="outer">
			    <div>
				    <div class="ch">濮撳悕:</div>
				    <div class="ip">
				<input type="text" name="name" value="${formBean.name }" />
					    <span>${formBean.errors.name}${DBMes}</span>
				    </div>
			    </div>
			    <div>
				    <div class="ch">瀵嗙爜:</div>
				    <div class="ip">
					    <input type="password" name="password" />
					    <span>${formBean.errors.password}</span>
				    </div>
			    </div>
			    <div>
				    <div class="ch">纭瀵嗙爜:</div>
				    <div class="ip">
					    <input type="password" name="password2" />
					    <span>${formBean.errors.password2}</span>
				    </div>
			    </div>
			    <div>
				    <div class="ch">閭:</div>
				    <div class="ip">
			<input type="text" name="email" value="${formBean.email }" />
					    <span>${formBean.errors.email}</span>
				    </div>
			    </div>
			    <div id="bt">
				    <input type="reset" value="閲嶇疆 " />
				    <input type="submit" value="娉ㄥ唽" />
			    </div>
		    </div>
	    </form>
</body>
</html>

           

6銆傚垱寤烘敞鍐屾垚鍔熼〉闈?

<%@ page language="java" pageEncoding="GBK" import="cn.itcast.chapter11.model2.domain.UserBean"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 
Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>login successfully</title>
    <style type="text/css">
        #main {
	        width: 500px;
	        height: auto;
        }
        #main div {
	        width: 200px;
	        height: auto;
        }
        ul {
	        padding-top: 1px;
	        padding-left: 1px;
	        list-style: none;
        }
    </style>
</head>
<body>
	    <%
		    if (session.getAttribute("userBean") == null) {
	    %>
	    <jsp:forward page="register.jsp" />
	    <%
		    return;
		    }
	    %>
	    <div id="main">
		    <div id="welcome">鎭枩浣狅紝鐧诲綍鎴愬姛</div>
             <hr />
		    <div>鎮ㄧ殑淇℃伅</div>
		    <div>
			    <ul>
				    <li>鎮ㄧ殑濮撳悕:${userBean.name }</li>
				    <li>鎮ㄧ殑閭:${userBean.email }</li>
			    </ul>
		    </div>
	    </div>
</body>
</html>

           

7銆傞厤缃畐eb.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:web="http://java.sun.com/xml/ns/javaee" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>鐢ㄦ埛娉ㄥ唽MVC</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>register.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welc**鍔犵矖鏍峰紡**ome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
    <description></description>
    <display-name>ControllerServlet</display-name>
    <servlet-name>ControllerServlet</servlet-name>
    <servlet-class>cn.itcast.chapter11.model2.web.ControllerServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>ControllerServlet</servlet-name>
    <url-pattern>/ControllerServlet</url-pattern>
  </servlet-mapping>
</web-app>
           

8銆傝繍琛岋細