本文目錄一覽:
jsp的兩個選擇題,不會做
第一個,選(d)
(1,2)好像jsp:getgetParam name=”” jsp:getParameter name=」」
不存在樣的,
(3)它是得session裡面的值,所以不行的,
第二個,選(b)
(1)因為A 它是包含結果,首先它會執行兩次,當他執行第二個時,它是得不到值的, 那樣得到只是一個null
(2)第二個是,代碼包含,它會把第個頁面的代碼copy近來,那樣就能得到了值了
(3,4)頁面跳轉,也不會得到值的,
在JSP中怎麼實現多項選擇題,可以給以下源代碼,
你說的多項選擇題,我是不是可以理解成多選??
多選的實現是這樣的:
第一: 必須將多選框放到form裡面。
第二: 然後name屬性完全一樣,value不相同。這樣當你提交到Action中的時候,只需要使用request對象獲取toselect的值就行了。
第三: 獲取值:request.getParameterValues(“toselect”),就會將選中的多選框裡面的value獲取,並且返回一個String[]數組,這個數組裡面就有你想要的值:即選中的值
html
body
form
input type = “checkbox” value = “A” name = “toselect”/A
input type = “checkbox” value = “B” name = “toselect”/B
input type = “checkbox” value = “C” name = “toselect”/C
input type = “checkbox” value = “D” name = “toselect”/D
/form
/body
/html
用jsp設計一個小的人事信息管理系統 (軟體工程)(課程設計)
幫你做,那肯定是要收費的,這個系統如果拿設計到源碼,如果開發的快,最少也要個2個星期!並且必須用SSH框架做,不然JSP寫SQL語句,那還不搞死人
jsp登陸界面源代碼
1、login.jsp文件
%@ page language=”java” contentType=”text/html; charset=GB18030″
pageEncoding=”GB18030″%
%@ page import=”java.util.*” %
!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”
html
head
title登錄頁面/title
/head
body
form name=”loginForm” method=”post” action=”judgeUser.jsp”
table
tr
td用戶名:input type=”text” name=”userName” id=”userName”/td
/tr
tr
td密碼:input type=”password” name=”password” id=”password”/td
/tr
tr
tdinput type=”submit” value=”登錄” style=”background-color:pink” input
type=”reset” value=”重置” style=”background-color:red”/td
/tr
/table
/form
/body
/html
2、judge.jsp文件
%@ page language=”java” contentType=”text/html; charset=GB18030″
pageEncoding=”GB18030″%
%@ page import=”java.util.*” %
!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”
html
head
title身份驗證/title
/head
body
%
request.setCharacterEncoding(“GB18030”);
String name = request.getParameter(“userName”);
String password = request.getParameter(“password”);
if(name.equals(“abc”) password.equals(“123”)) {
3、afterLogin.jsp文件
%
jsp:forward page=”afterLogin.jsp”
jsp:param name=”userName” value=”%=name%”/
/jsp:forward
%
}
else {
%
jsp:forward page=”login.jsp”/
%
}
%
/body
/html
%@ page language=”java” contentType=”text/html; charset=GB18030″
pageEncoding=”GB18030″%
!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN”
html
head
title登錄成功/title
/head
body
%
request.setCharacterEncoding(“GB18030”);
String name = request.getParameter(“userName”);
out.println(“歡迎你:” + name);
%
/body
/html
擴展資料:
java web登錄界面源代碼:
1、Data_uil.java文件
import java.sql.*;
public class Data_uil
{
public Connection getConnection()
{
try{
Class.forName(“com.microsoft.sqlserver.jdbc.SQLServerDriver”);
}catch(ClassNotFoundException e)
{
e.printStackTrace();
}
String user=”***”;
String password=”***”;
String url=”jdbc:sqlserver://127.0.0.1:1433;DatabaseName=***”;
Connection con=null;
try{
con=DriverManager.getConnection(url,user,password);
}catch(SQLException e)
{
e.printStackTrace();
}
return con;
}
public String selectPassword(String username)
{
Connection connection=getConnection();
String sql=”select *from login where username=?”;
PreparedStatement preparedStatement=null;
ResultSet result=null;
String password=null;
try{
preparedStatement=connection.prepareStatement(sql);
preparedStatement.setString(1,username);
result=preparedStatement.executeQuery();//可執行的 查詢
if(result.next())
password=result.getString(“password”);
}catch(SQLException e){
e.printStackTrace();
}finally
{
close(preparedStatement);
close(result);
close(connection);
}
System.out.println(“找到的資料庫密碼為:”+password);
return password;
}
public void close (Connection con)
{
try{
if(con!=null)
{
con.close();
}
}catch(SQLException e)
{
e.printStackTrace();
}
}
public void close (PreparedStatement preparedStatement)
{
try{
if(preparedStatement!=null)
{
preparedStatement.close();
}
}catch(SQLException e)
{
e.printStackTrace();
}
}
public void close(ResultSet resultSet)
{
try{
if(resultSet!=null)
{
resultSet.close();
}
}catch(SQLException e)
{
e.printStackTrace();
}
}
}
2、login_check.jsp:文件
%@ page language=”java” contentType=”text/html; charset=utf-8″
pageEncoding=”utf-8″%
!DOCTYPE html PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN” “”
html
head
meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″
title驗證用戶密碼/title
/head
body
jsp:useBean id=”util” class=”util.Data_uil” scope=”page” /
%
String username=(String)request.getParameter(“username”);
String password=(String)request.getParameter(“password”);
if(username==null||””.equals(username))
{
out.print(“script language=’javaScript’ alert(‘用戶名不能為空’);/script”);
response.setHeader(“refresh”, “0;url=user_login.jsp”);
}
else
{
System.out.println(“輸入的用戶名:”+username);
String passwordInDataBase=util.selectPassword(username);
System.out.println(“密碼:”+passwordInDataBase);
if(passwordInDataBase==null||””.equals(passwordInDataBase))
{
out.print(“script language=’javaScript’ alert(‘用戶名不存在’);/script”);
response.setHeader(“refresh”, “0;url=user_login.jsp”);
}
else if(passwordInDataBase.equals(password))
{
out.print(“script language=’javaScript’ alert(‘登錄成功’);/script”);
response.setHeader(“refresh”, “0;url=loginSucces.jsp”);
}
else
{
out.print(“script language=’javaScript’ alert(‘密碼錯誤’);/script”);
response.setHeader(“refresh”, “0;url=user_login.jsp”);
}
}
%
/body
/html
3、loginSucces.jsp文件
%@ page language=”java” contentType=”text/html; charset=utf-8″
pageEncoding=”utf-8″%
!DOCTYPE html PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN” “”
html
head
meta http-equiv=”Content-Type” content=”text/html; charset=ISO-8859-1″
titleInsert title here/title
/head
body
hr size=”10″ width=”26%” align=”left” color=”green”
font size=”6″ color=”red” 登錄成功 /font
hr size=”10″ width=”26%” align=”left” color=”green”
/body
/html
4、user_login.jsp文件
%@ page language=”java” contentType=”text/html; charset=utf-8″
pageEncoding=”utf-8″%
!DOCTYPE html PUBLIC “-//W3C//DTD HTML 4.01 Transitional//EN” “”
html
head
meta http-equiv=”Content-Type” content=”text/html; charset=ISO-8859-1″
title登錄界面/title
/head
body background=”C:\Users\win8\workspace\Login\image\9dcbdc339e72a5663b5c289fb5573c13_10.jpg”
center
brbrbrbrbrbr
h1 style=”color:yellow”Login/h1
br
form name=”loginForm” action=”login_check.jsp” method=”post”
table Border=”0″
tr
td賬號/td
tdinput type=”text” name=”username”/td
/tr
tr
td密碼/td
tdinput type=”password” name=”password”
/td
/tr
/table
br
input type=”submit” value=”登錄” style=”color:#BC8F8F”
/form
/center
/body
/html
原創文章,作者:簡單一點,如若轉載,請註明出處:https://www.506064.com/zh-tw/n/129053.html