第十周作业
1.设计一个注册页面，实现用户注册功能
package yxf;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
public static Connection getConnection() {
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver");
con=DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");
System.out.println(con);
} catch (Exception e) {
e.printStackTrace();
}
return con;
}
protected static 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();
}
}
}
package yxf;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class StuDao {
public int Register(String uname, String password, int age) {
int i = -1;
Connection con = BaseDao.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 {
BaseDao.closeAll(con, pred, null);
}
return i;
}
public boolean Login(String uname, String password) {
boolean f = false;
Connection con = BaseDao.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 {
BaseDao.closeAll(con, pred, resultSet);
}
return f;
}
}
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); %> <!DOCTYPE HTML> <html> <head> <title>login</title> </head> <body> <form action="dologin.jsp" method="post"> 账号<input type="text" name="uname"><br> 密码<input type="password" name="password"><br> <input type="submit" value="登录"> <a href="register.jsp">注册</a> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML> <html> <head> <title>dologin</title> </head> <body> 登陆成功 </body> </html>
<%@ 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> <form action="doregister.jsp" method="post"> 账号<input type="text" name="uname"><br> 密码<input type="password" name="password"><br> 年龄<input type="number" name="age"><br> <input type="submit" value="注册"> <input type="reset" value="重置"> </form> </body> </html>
<%@page import="yxf.StuDao"%> <%@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"); String age = request.getParameter("age"); int age1 = age == null ? -1 : Integer.parseInt(age); StuDao sd=new StuDao(); int i=sd.Register(uname, password, age1); if(i>0){ request.getRequestDispatcher("login.jsp").forward(request, response); } %> </body> </html>
