1.linux怎么获得网页源码。源码
2.win10 cmake源码编译安装opencv(c++,源码qt)(解决ffmpeg下载失败导致opencv无法处理视频)
3.jsp登陆界面源代码
linux怎么获得网页源码。
操作设备:戴尔电脑操作系统:win
操作软件:linux
1、源码首先连接相应linux主机,源码进入到linux命令行状态下,源码等待输入shell指令。源码pdffactory源码
2、源码其次在linux命令行中输入:curl 。源码
3、源码最后按下回车键执行shell指令,源码此时会看到网页被成功打开获取到了源代码。源码
win cmake源码编译安装opencv(c++,源码qt)(解决ffmpeg下载失败导致opencv无法处理视频)
要使用Qt与Windows上的OpenCV,当默认的源码移动首页网站源码msvc版本不满足需求时,需要通过源码编译安装,源码并配合cmake工具。源码以下是详细的步骤:
首先,下载OpenCV sources版本,同时确保已经安装了cmake编译工具,这里推荐选择对应版本的传奇网页端源码MinGW版本。在Qt的mingw环境中,需将mingw的bin路径(例如:D:\Programs\Qt\Qt5..\Tools\mingw_\bin)添加到环境变量,验证配置成功可通过在cmd中输入gcc -v。
解压OpenCV到指定位置,创建一个build文件夹。使用cmake-gui,网络蜘蛛 vc源码设置源码路径和build文件夹,配置为MinGW Makefiles。初次配置可能遇到问题,如ffmpeg下载失败,这时需要重命名ffmpeg.cmake为ffmpeg.txt,修改其中的怡代挂源码下载地址为/。
在cmake-gui中,勾选with_qt和with_opengl,取消opencv_enable_allocator_stats和与python相关的选项。如果需要python支持,可以使用pip安装。配置完成后,再次点击configure并生成makefile,确保所有路径正确。
在build文件夹中,通过mingw-make -j(根据你的CPU核心数设置线程数,例如)开始编译,最后执行mingw-make install。安装后,别忘了将安装路径(如D:\Programs\opencv3.4.\build\install\x\mingw\bin)添加到系统环境变量。
通过这些步骤,你就可以在Qt环境中成功安装并使用OpenCV处理视频了,无需担心ffmpeg下载失败的问题。
jsp登陆界面源代码
1、login.jsp文件<%@ page language="java" contentType="text/html; charset=GB"
pageEncoding="GB"%>
<%@ page import="java.util.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">
<html>
<head>
<title>登录页面</title>
</head>
<body>
<form name="loginForm" method="post" action="judgeUser.jsp">
<table>
<tr>
<td>用户名:<input type="text" name="userName" id="userName"></td>
</tr>
<tr>
<td>密码:<input type="password" name="password" id="password"></td>
</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=GB"
pageEncoding="GB"%>
<%@ page import="java.util.*" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">
<html>
<head>
<title>身份验证</title>
</head>
<body>
<%
request.setCharacterEncoding("GB");
String name = request.getParameter("userName");
String password = request.getParameter("password");
if(name.equals("abc")&& password.equals("")) {
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=GB"
pageEncoding="GB"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4. Transitional//EN">
<html>
<head>
<title>登录成功</title>
</head>
<body>
<%
request.setCharacterEncoding("GB");
String name = request.getParameter("userName");
out.println("欢迎你:" + name);
%>
</body>
</html>
扩展资料:
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://.0.0.1:;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. Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<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. Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO--1">
<title>Insert title here</title>
</head>
<body>
<hr size="" width="%" align="left" color="green">
<font size="6" color="red" >登录成功 </font>
<hr size="" width="%" 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. Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO--1">
<title>登录界面</title>
</head>
<body background="C:\Users\win8\workspace\Login\image\9dcbdceab5cfbc_.jpg" >
<center>
<br><br><br><br><br><br>
<h1 style="color:yellow">Login</h1>
<br>
<form name="loginForm" action="login_check.jsp" method="post">
<table Border="0" >
<tr >
<td>账号</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password">
</td>
</tr>
</table>
<br>
<input type="submit" value="登录" style="color:#BC8F8F">
</form>
</center>
</body>
</html>