jsp登陆界面源码_给定JSP程序源码如下：

1. JSP登陆页面小实验

//20块钱搞定...
<html>
<head>
<scriptsrc="......jquery.1.7.2.js"></script>
<scripttype="text/javascript">
varloginNum=0;
functionlogin(){
varac=$("input[name=account]").val();
varpwd=$("input[name=pwd]").val();
$.ajax({
url:"login.jsp",
type:"POST",
data:"name="+ac+"&pwd="+pwd,
success:function(res){
if(res==0){
loginNum++;
if(loginNum==3){window.close();}
}else{
window.location='login.jsp';
}
}
});
}
</script>
</head>
<body>
账户：<inputtype="text"name="account"/><br/>
密码：<inputtype="password"name="pwd"/><br/>
<inputtype="button"value="登陆"onclick="login()"/>
</body>
</html>
login.jsp
<%
Stringac=request.getParameter("name");
Stringpwd=request.getParameter("pwd");
PrintWriterpw=response.getWriter();
Stringmsg="";
if(ac.equals("sa")&&pwd.equals("pwd")){
msg="1";
}else{
msg="0";
}
out.println(msg);
out.flush();
out.close();


%>
Welcome

2. 网上下的jsp源码要怎么用

需要部署到服务器中

找到菜单window→ShowView→Servers，打开Servers视图标签，部署的Tomcat服务

在新打开的对话框中，有一个Project项，选择要部署的项目

点击“Finish”完成部署

这样项目就部署到Tomcat里面去了

3. idea 运行JSP后显示源代码是什么情况

1.这种情况，应该是jsp的内容被当做文本直接显示到了页面上，一般在使用springMVC时可能出现这样的问题，猜测可能使用了springMVC。
2.具体解决方案：
查找web.xml文件，并找到springMVC的相关配置

<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>

将上面的内容改为下面的即可拦截是/ 而不是/*
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

原因：在这种情况向springMVC会把*.jsp,*.sql,*.txt都当做txt处理。结果就是直接在浏览器加载了jsp源码。

4. jsp登陆界面源代码

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>

</head>

<body>

<table>

<tr>

</tr>

<tr>

</tr>

<tr>

<td><input type="submit" value="登录" 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>

</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>

</head>

<body>

request.setCharacterEncoding("GB18030");

String name = request.getParameter("userName");

out.println("欢迎你:" + name);

</body>

</html>

(4)jsp登陆界面源码扩展阅读：

java web登录界面源代码：

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();//可执行的查询

if(result.next())

password=result.getString("password");

}catch(SQLException e){

e.printStackTrace();

}finally

{

close(preparedStatement);

close(result);

close(connection);

}

System.out.println("找到的数据库密码为："+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" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>验证用户密码</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('用户名不能为空');</script>");

response.setHeader("refresh", "0;url=user_login.jsp");

}

else

{

System.out.println("输入的用户名:"+username);

String passwordInDataBase=util.selectPassword(username);

System.out.println("密码："+passwordInDataBase);

if(passwordInDataBase==null||"".equals(passwordInDataBase))

{

out.print("<script language='javaScript'> alert('用户名不存在');</script>");

response.setHeader("refresh", "0;url=user_login.jsp");

}

else if(passwordInDataBase.equals(password))

{

out.print("<script language='javaScript'> alert('登录成功');</script>");

response.setHeader("refresh", "0;url=loginSucces.jsp");

}

else

{

out.print("<script language='javaScript'> alert('密码错误');</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" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<title>Insert title here</title>

</head>

<body>

</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" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

</head>

<h1 style="color:yellow">Login</h1>

<br>

<tr >

</tr>

<tr>

</td>

</tr>

</table>

<br>

</form>

</center>

</body>

</html>

5. 用jsp怎样做一个用户登录界面

//jsp文件,登录界面
<%@pagepageEncoding="utf-8"contentType="text/html;charset=utf-8"%>
<body>
<h1>Register</h1>
<hr/>
<formaction="login"method="post">
用户名：š
<inputtype="text"name="username"id="text"/>
密码：š
<inputtype="password"name="pwd"id="text"//>
<inputtype="submit"value="登录"id="button"/>
</form>
</body>

//这是server文件，web.xml部署名字login
importjava.io.IOException;

importjavax.servlet.ServletException;
importjavax.servlet.http.HttpServlet;
importjavax.servlet.http.HttpServletRequest;
importjavax.servlet.http.HttpServletResponse;
importjavax.servlet.http.HttpSession;

{

	publicvoidservice(HttpServletRequestrequest,HttpServletResponseresponse)
	throwsServletException,IOException{

		response.setContentType("text/html;charset=utf-8");
		request.setCharacterEncoding("utf-8");
		Stringusername=request.getParameter("username");
		Stringpwd=request.getParameter("pwd");

		try{
			if(username.equals（"name"）&&pwd.equals("pwd")){
			system.out.print("登录成功");
			}else{
			system.out.print("error");
			}
		}catch(Exceptione){
			e.printStackTrace();
		}
	}
}

简单的登录界面，不需要数据库，如果要链接数据库就要判断很多了

6. 给定JSP程序源码如下：

a和d是表达式，所以有输出；c和d是java程序片，要想输出得用java的输出，所以这里没有输出。
a是先加后输出，d是先输出后加，所以一个是2，一个是1.

7. jsp 中网站的首页源代码

这是最简单的一个例子，数据库要你自己建，用的是ACCESS

<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>JSP连接Access数据库</title>
<style type="text/css">

</style>
</head><body>
<div align="center" class="style1">JSP连接Access数据库</div>
<br>
<hr>
<p><%
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); //载入驱动程序类别
Connection con = DriverManager.getConnection("jdbc:odbc:jspdata"); //建立数据库链接,jspdata为ODBC数据源名称
//建立Statement对象
Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
ResultSet rs = stmt.executeQuery("select * from lyb"); //建立ResultSet(结果集)对象，并执行SQL语句
%>
</p>
<p align="center">NUMB1数据表中记录如下</p>
<table width="640" border="1" align="center" bordercolor="#7188e0">
<tr bgcolor="d1d1ff">
<th width="49">编号</th>
<th width="90">姓名</th>
<th width="126">E-mail</th>
<th width="221">网站</th>
<th width="80">QQ</th>
</tr>
<%
while(rs.next())
{
%>
<tr bgcolor="#f8f8f8">
<th><%= rs.getString(1) %></th>
<th><%= rs.getString(2) %></th>
<th><%= rs.getString(3) %></th>
<th bgcolor="#f6f6f8"><%= rs.getString(4) %></th>
<th><%= rs.getString(5) %></th>
</tr>
<%
}
rs.close();
stmt.close();
con.close();
%>
</table>
<p align="center"><br>
如果您能看到表格中的数据，说明连接数据库成功！</p>
</body>
</html>

8. jsp登录代码

login.jsp

<%@ page language="java" pageEncoding="utf-8"%>
<html>
<head>

<title>登录</title>
<script language="javascript">

function checkform() {
if (form4.name.value.length==0){
alert("请输入正确的姓名！");
form4.name.focus();
return false;
}
if (form4.password.value.length==0){
alert("请输入正确的密码!");
form4.password.focus();
return false;
}

}
</script>
<style type="text/css">

</style>
</head>

<body>
<div id="Layer1" style="left: 16px; width: 369px;">
<form id="form4" name="form4" method="post" action="loginControl.jsp">
<table border="0" style="top: 443px; left: 17px; width: 240px; height: 240px;">
<tr>
<td colspan="3"> <div align="center"><strong>用户登录</strong></div></td>
</tr>
<tr>
<td ><div align="right"><strong>用户名:</strong></div></td>
<td colspan="1"><input type="text" name="name" /></td>
</tr>
<tr>
<td ><div align="right"><strong>密码:</strong><strong> </strong></div></td>
<td colspan="1"><input type="password" name="password" /></td>
</tr>
<tr>
<td height="37" colspan="3">
<label>
<input type="submit" name="Submit" value="登录"onclick="javascript:return(checkform());" />

</label>
<input type="reset" name="reset" value="重填" />

</td>
</tr>
</table>
</form>
</div>
<div id="Layer2"> <img src=2.jpg width="120" height="120"/></div>
<label></label>
</body>
</html>

loginControl.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ include file="tdb.jsp"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<style type="text/css">

</style>
<head>
<title>My JSP 'loginControl.jsp' starting page</title>
</head>
<body>
<%
String name= request.getParameter("name");
String password= request.getParameter("password");
System.out.println("成功11111");
sql="SELECT * FROM tdb WHERE user_Name='"+name+"' AND user_Pwd='"+password+"'";
rs = smt.executeQuery(sql);
if(!rs.next())
{%>
<script type="text/javascript">
alert("用户名和密码不正确！！！");
window.location.href='index.jsp';
</script><%

}
response.sendRedirect("main.jsp");
%>
</body>
</html>

tdb.jsp

<%

Class.forName("oracle.jdbc.OracleDriver");

java.sql.Connection con=null;
con=java.sql.DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:ABC","zhan","123");
java.sql.Statement smt=con.createStatement();
java.sql.ResultSet rs;
java.sql.PreparedStatement ps;
String sql;
%>

9. 做一个web登录界面，login.jsp里面进行登录，loginservlet进行登录处理，然后转回login.jsp进行显示

首先，你jsp跳转到Servlet是用哪种方法传值的，是form表单提交，还是用连接（&loginok=true）这样的提交。无论怎样提交。boolean loginok = req.getParameter(loginok);也不对啊。req是什么类型的啊？你的loginok是放在session里面的。所以先创建session对象，然后在用session的内置方法获取loginok的值。HttpSession session = request.getSession();然后在boolean loginok = session.getAttribute("loginok");
下面是我自己登陆用的Servlet希望可以帮到你：
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String userName = "";
String userPwd = "";
String flag = "";
flag = request.getParameter("flag");
if (flag == null) {
flag = "";
}
if (flag.equals("back")) {
HttpSession session = request.getSession();
session.invalidate();
flag = "";
response.sendRedirect("/MicroBlog/initServlet");
} else {
boolean bool = false;
action login = new action();
try {
RequestDispatcher rd = null;
request.setCharacterEncoding("UTF-8"); // 中文转码
response.setCharacterEncoding("UTF-8");

userName = request.getParameter("name"); // 获得用户登录名
userPwd = request.getParameter("pwd"); // 获得用户密码

bool = login.getLogin(userName, userPwd);
HttpSession session = request.getSession();
if (bool) { // 登陆成功
UserForm userForm = login.getUser();
ArrayList<String> guanList = login.getGuan(userForm.getId());
ArrayList<ExForm> expList = login.getExp();
session.setAttribute("exp", expList);
session.setAttribute("user", userForm);
session.setAttribute("guan", guanList);
rd = request.getRequestDispatcher("user.jsp");

} else {
rd = request.getRequestDispatcher("error.jsp");
}

rd.forward(request, response);

} catch (Exception e) {
e.printStackTrace();
}
}
}

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jsp登陆界面源码

(4)jsp登陆界面源码扩展阅读：

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