Java第十次作业
package tenth.week; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class Jdbct extends jdbc { public int Register(String uname, String password, int age) { int i = -1; Connection con = getConnection(); String sql = "insert into stu(uname,password,age)values(?,?,?)"; PreparedStatement pred = null; try { pred = con.prepareStatement(sql); pred.setString(1, uname); pred.setString(2, password); pred.setInt(3, age); i = pred.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } finally { closeAll(con, pred, null); } return i; } public boolean Login(String uname, String password) { boolean f=false; Connection con = getConnection(); String sql = "select * from stu where uname=? and password=?"; PreparedStatement pred = null; ResultSet resultSet = null; try { pred = con.prepareStatement(sql); pred.setString(1, uname); pred.setString(2, password); resultSet = pred.executeQuery(); while (resultSet.next()) { f=true; } } catch (SQLException e) { e.printStackTrace(); } finally { closeAll(con, pred, resultSet); } return f; } }
package tenth.week; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class jdbc{ public Connection getConnection() { Connection con = null; try { Class.forName("com.mysql.jdbc.Driver"); con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","010616"); } catch (Exception e) { e.printStackTrace(); } return con; } protected void closeAll(Connection con,PreparedStatement ps,ResultSet rs){ try { if(rs != null) rs.close(); if(ps != null) ps.close(); if(con != null) con.close(); } catch (SQLException e) { e.printStackTrace(); } } }
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title>注册</title> </head> <body> <h1>欢迎</h1> <form action="index.jsp" method="post"> <table> <tr> <td>用户名</td> <td><input type="text" name="uname"></td> </tr> <tr> <td>密码</td> <td><input type="password" name="password"></td> </tr> <tr> <td>年龄</td> <td><input type="text" name="age"></td> </tr> <tr> <td><input type="submit" value="注册"></td> </tr> </table> </form> </body> </html>
<%@page import="tenth.week.Jdbct"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <% String uname = request.getParameter("uname"); String password = request.getParameter("password"); String age = request.getParameter("age"); int age1 = age == null ? -1 : Integer.parseInt(age); Jdbct sd=new Jdbct(); int i=sd.Register(uname, password, age1); if(i>0){ request.getRequestDispatcher("MyJsp.jsp").forward(request, response); }else{ out.print("注册失败"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title>登录</title> </head> <body> <h1>欢迎</h1> <form action="on.jsp" method="post"> <table> <tr> <td>用户名</td> <td><input type="text" name="uname"></td> </tr> <tr> <td>密码</td> <td><input type="password" name="password"></td> </tr> <tr> <td><input type="submit" value="登录"></td> <td><a href="on.jsp">注册</a></td> </tr> </table> </form> </body> </html>
<%@page import="tenth.week.Jdbct"%> <%@page import="javax.xml.bind.ParseConversionEvent"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <% String uname = request.getParameter("uname"); String password = request.getParameter("password"); Jdbct sd=new Jdbct(); if(sd.Login(uname, password)){ request.getRequestDispatcher("under.jsp").forward(request, response); }else{ out.print("登陆失败,即将跳回登陆页....."); response.setHeader("refresh", "2;url=MyJsp.jsp"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8");%> <!DOCTYPE HTML> <html> <head> <title></title> </head> <body> <h1>登录成功</h1> </body> </html>