zoukankan html css js c++ java

jsp第七周作业

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
   
  <body>
    <form name="form1" method="post" action="control.jsp" >
        <table>
        <tr> 
            <td>编号：</td>
                <td> <input type="text" name="sid" id="userName"  ></td>
            </tr>
            <tr> 
                <td>用户名：</td>
                <td> <input type="text" name="uname" id="userName"  ></td>
            </tr>
            <tr> 
                <td>输入登录密码：</td>
                <td><input type="password" name="upwd" id="pwd"></td>
            </tr>
             
            <tr> 
                <td colspan="2"><input type="submit" value="登录">   <input type="submit" value="注册"></td>
            </tr>
        </table>
    </form>
  </body>
</html>

control.jsp

<%@page import="com.gd.dao.StuDao"%>
<%@page import="com.gd.bean.Stu"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
    Stu s = new Stu();
    int id = Integer.parseInt(request.getParameter("sid"));
    s.setSid(id);
    String uname = request.getParameter("uname");
    s.setUname(uname);
    String upwd = request.getParameter("upwd");
    s.setUpwd(upwd);
     
    StuDao sd=new StuDao();
    if(sd.addstu(s)>0){
        //跳转注册成功页面
    }else{
        //错误页面
    }
%>
<%   
    if(uname.equals("scg")&&upwd.equals("123")){
    //跳转成功登录页面
    request.getRequestDispatcher("success.jsp").forward(request, response);
    session.setAttribute("uname",uname);
    }
    else{
    //错误页面
    request.getRequestDispatcher("index.jsp").forward(request, response);
    }
%>

success.jsp

<%@ page language="java" import="java.util.*" contentType="text/html;charset=utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
  
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
   登录成功<br>
  </body>
</html>

Stu.java

package com.gd.bean;

public class Stu {
    private int sid;
    private String uname;
    private String upwd;
    //访问器
    public int getSid() {
        return sid;
    }
    public void setSid(int sid) {
        this.sid = sid;
    }
    public String getUname() {
        return uname;
    }
    public void setUname(String uname) {
        this.uname = uname;
    }
    public String getUpwd() {
        return upwd;
    }
    public void setUpwd(String upwd) {
        this.upwd = upwd;
    }
    //构造器
    public Stu(int sid, String uname, String upwd) {
        super();
        this.sid = sid;
        this.uname = uname;
        this.upwd = upwd;
    }
    public Stu() {
        super();
    }  
}

StuDao.java

package com.gd.dao;

import java.sql.DriverManager;
import java.sql.PreparedStatement;
 
import com.gd.bean.Stu;
import com.sun.corba.se.pept.transport.Connection;
 
public class StuDao {
    public int addstu(Stu s){
        int i=0;
         
        try {
            //加载驱动
            Class.forName("com.mysql.jdbc.Driver");
            //建立连接
            Connection con=(Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=utf8", "root", "root");           
            //写SQL语句
            String sql="insert into stu values(?,?,?)";        
            //执行
            PreparedStatement ps=((java.sql.Connection) con).prepareStatement(sql);
            ps.setInt(1, s.getSid());
            ps.setString(2, s.getUname());
            ps.setString(3, s.getUpwd());
            i=ps.executeUpdate();
             
             
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return i;
    }
    public int selectUser(Stu u){
        int n=0;
        try{
            Class.forName("com.mysql.jdbc.Driver");
            Connection con=(Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/mysql?useUnicode=true&characterEncoding=utf8", "root", "root");   
            String sql="select uname,upwd from stu where uname=?and upwd=?";   
            PreparedStatement ps=((java.sql.Connection) con).prepareStatement(sql);
            ps.setInt(1,u.getSid());
            ps.setString(2, u.getUname());
            ps.setString(3, u.getUpwd());
            n=ps.executeUpdate();
             
        } catch (Exception e) {
            e.printStackTrace();
        }
        return n;
    }
}

newfile.sql

create table stu(
sid int primary key,
uname varchar(20),
upwd varchar(20)
)

insert into stu values(1,'zs','123');
insert into stu values(2,'ls','456');
insert into stu values(3,'scg','111');

delete from stu;

<%@ page language="java" import="java.util.*" contentType="text/html;charset=utf-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> </head> <body> 登录成功<br> </body></html>

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原文地址：https://www.cnblogs.com/sigure0428/p/14676916.html