| JSP学习笔记(三)-----使用JSP处理用户注册和登陆 |
| 日期：2006-2-3 20:20:32 人气： [大 中 小] |
1. 这是一个JSP实例，由四个JSP页面组成，处理用户的注册和登陆信息 2. 首先是login.jsp,代码如下： <html> <center> <form method=get action="http://127.0.0.1:8000/jsp/test.jsp"> username<input type=text name=username> <br><br> password<input type=password name=pass> <br><br> <input type=submit value="注册"> </form>
<form method=get action="http://127.0.0.1:8000/jsp/test3.jsp"> username<input type=text name=username> <br><br> password<input type=password name=pass> <br><br> <input type=submit value="登陆"> </form> <br> </center> </html>
3. test.jsp代码如下：（主要处理用户注册，将注册信息插入数据库） <html> <%@ page language="java" import="java.sql.*"%> your username is:<%=request.getParameter("username")%> <br><br> your password is:<%=request.getParameter("pass")%> <br><br> <% String name=request.getParameter("username"); String pass=request.getParameter("pass"); try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa",""); PreparedStatement stat=dbcon.prepareStatement( "insert login values(?,?)"); stat.setString(1,name); stat.setString(2,pass); stat.executeUpdate(); out.println("<br><br><B>insert successful</B>"); } catch(Exception e) { out.println(e); } %> <b>Click here to view all people</b> <form method=get action="http://127.0.0.1:8000/jsp/test2.jsp"> <input type=submit value="--->"> </form> </html>
4. test2.jsp，代码如下：（处理当用户注册成功之后可以查看所有的注册用户名单） <html> <%@ page language="java" import="java.sql.*"%> <% try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa",""); PreparedStatement stat=dbcon.prepareStatement( "select * from login"); ResultSet result=stat.executeQuery(); %> <table border=2> <% while(result.next()) { %> <tr><td><%=result.getString(1)%><td></tr>
<% } %> </table> <% } catch(Exception e) { out.println(e); } %> </html>
5. test3.jsp代码如下：（处理用户登录信息） <html> your username is:<%=request.getParameter("username")%> <br><br> your password is:<%=request.getParameter("pass")%> <br><br> <%@ page language="java" import="java.sql.*"%> <% String name=request.getParameter("username"); String pass=request.getParameter("pass"); try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa",""); PreparedStatement stat=dbcon.prepareStatement( "select * from login where username=? and password=?"); stat.setString(1,name); stat.setString(2,pass); ResultSet result=stat.executeQuery();
if(result.next()) { out.println("Login Successful"); } else { out.println("Login Error"); } } catch(Exception e) { out.println(e); } %>
6.此外还需要一个名为login的数据库，只需要两个列username,password就可以了 |
| 出处：CnCode转载收集 作者：不详 |
