java用代码编写页面 jsp页面写java代码

如何用java编写 网页

一般在网上有免费的界面提供下载，有一定的html，css，脚本方面的知识，即使不懂，也能自我修改达到你要求的效果 算了我直接给你代码得了

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*************************************test.html*********************************************************

!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ""

html xmlns=""

head

meta http-equiv="Content-Type" content="text/html; charset=gb2312" /

title3列固定宽度居中+头部+尾部——a href=""标准之路;/a/title

link href="layout.css" rel="stylesheet" type="text/css" /

/head

body

div id="container"

div id="header"This is the Header/div

div id="mainContent"

div id="sidebar"This is the sidebar/div

div id="sidebar2"This is the sidebar2/div

div id="content"3列固定宽度居中+头部+尾部——a href=""标准之路;/a/div

/div

div id="footer"This is the footer/div

/div

/body

/html

********************************************layout.css *************************************************

body { font-family:Verdana; font-size:14px; margin:0;}

#container {margin:0 auto; width:900px;}

#header { height:100px; background:#6cf; margin-bottom:5px;}

#mainContent { height:500px; margin-bottom:5px;}

#sidebar { float:left; width:200px; height:500px; background:#9ff;}

#sidebar2 { float:right; width:200px; height:500px; background:#9ff;}

#content { margin:0 205px !important; margin:0 202px; height:500px; background:#cff;}

#footer { height:60px; background:#6cf;}

如何用java写网页

用MyEclipse新建WEB项目，跟你新建java项目是同一级别目录下的。要写网页就是JSP了，JSP开发你要学会servlet和jsp，这是最起码的，servlet就是java代码了，jsp类似于html。

求用java编登录页面，可以连接MySql 数据库

第一步：创建一个查询过程，因为在登录时要根据用户名查询用户密码

此步要用到pl/sql编程知识，代码如下：

create or replace procedure sel_user(uname in varchar2,pass out varchar2) is

begin

select users.password into pass from users where users.username=uname and rownum = 1;

end;

第二步：编写登录页面（login.java）（采用纯java+servlet编写）

//login.java如下

package cn.hnu;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class testhtml extends HttpServlet {

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

resp.setContentType("text/html;charset=gbk");

try {

PrintWriter pw = resp.getWriter();

pw.println("html");

pw.println("head");

pw.println("title");

pw.println("用户登录");

pw.println("/title");

pw.println("/head");

pw.println("body");

pw.println("h1用户登录/h1");

pw.println("hr");

pw.println("form method=post action=loginCl");

pw.println("用户名：input type=text name=userNamebr");

pw.println("密nbspnbsp码：input type=password name=passwordbr");

pw.println("input type=submit value=登录");

pw.println("input type=reset value=重置");

pw.println("/form");

pw.println("/body");

pw.println("/html");

} catch (Exception e) {

e.printStackTrace();

// TODO: handle exception

}

}

@Override

protected void doPost(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

this.doGet(req, resp);

}

}

第三步：编程成功登录页面（wel.java） //wel.java如下，它主要用于用户正常登录后显示信息给用户

package cn.hnu;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

public class Wel extends HttpServlet {

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

//防止用户非法登录

HttpSession hs = req.getSession();

String s = (String)hs.getAttribute("pass");

if(s == null){

resp.sendRedirect("login");

}

PrintWriter pw = resp.getWriter();

pw.write("welcome,hello");

}

@Override

protected void doPost(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

this.doGet(req, resp);

}

}

第四步：编写login处理页面（loginCl.java）

package cn.hnu;

import java.io.IOException;

import java.sql.*;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

public class loginCl extends HttpServlet {

@Override

protected void doGet(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

String u = req.getParameter("userName");

String p = req.getParameter("password");

//查询数据库

String pa=null;

Connection ct = null;

CallableStatement cs = null;

try {

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

ct = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:oracle",

"scott", "tiger");

cs = ct.prepareCall("{call sel_user(?,?)}");

cs.setString(1, u);

cs.registerOutParameter(2, oracle.jdbc.OracleTypes.VARCHAR);

cs.execute();

pa = cs.getString(2);

System.out.println("u=" + u + " p=" + pa);

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

} finally {

try {

if (cs != null) {

cs.close();

}

if (ct != null) {

ct.close();

}

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

//验证用户信息是否合法

if (p.equals(pa)) {

HttpSession hs = req.getSession(true);//防止用户非法登录

hs.setAttribute("pass", "OK");

resp.sendRedirect("wel");

} else {

resp.sendRedirect("login");

}

}

@Override

protected void doPost(HttpServletRequest req, HttpServletResponse resp)

throws ServletException, IOException {

// TODO Auto-generated method stub

this.doGet(req, resp);

}

}

亲，sql可以换成MySQL

这个没关系的，别的都可以照搬来用

用java编写一个程序。设计一个页面，第一行含有三个按钮，第二行正中间含有一

代码：

package FrameText;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class FrameDemo extends JFrame {

JButton jbtwo ,jbHello, jbBye;

public FrameDemo() {

setLayout(new GridLayout(3, 1));// 3行1列布局

JPanel jp1 = new JPanel();// 第一行

JButton jb1 = new JButton("第一个按钮");

JButton jb2 = new JButton("第二个按钮");

JButton jb3 = new JButton("第三个按钮");

jp1.add(jb1);

jp1.add(jb2);

jp1.add(jb3);

add(jp1);

JPanel jp2 = new JPanel();// 第二行

JButton jbtwo = new JButton("第四个按钮");

jp2.add(jbtwo);

add(jp2);

JPanel jp3 = new JPanel();// 第三行

jbHello = new JButton("第五个按钮");

jbBye = new JButton("第六个按钮");

jp3.add(jbHello);

jp3.add(jbBye);

add(jp3);

setSize(380, 180);

setTitle("窗口");

setLocationRelativeTo(null);

setDefaultCloseOperation(EXIT_ON_CLOSE);

setVisible(true);

}

//点击按钮后响应

public static void main(String[] args) {

new FrameDemo();

}

}

运行时可调用浏览器打开一个网页，网页地址在代码中的java代码怎么写？

网页地址在代码中的java代码写法如下：

packagecom.test;

importjava.lang.reflect.Method;

//实现打开浏览器并跳到指定网址的类

publicclassBareBonesBrowserLaunch{

publicstaticvoidopenURL(Stringurl){

try{

browse(url);

}catch(Exceptione){

}

}

privatestaticvoidbrowse(Stringurl)throwsException{

//获取操作系统的名字

StringosName=System.getProperty("os.name","");

if(osName.startsWith("MacOS")){

//苹果的打开方式

ClassfileMgr=Class.forName("com.apple.eio.FileManager");

MethodopenURL=fileMgr.getDeclaredMethod("openURL",newClass[]{String.class});

openURL.invoke(null,newObject[]{url});

}elseif(osName.startsWith("Windows")){

//windows的打开方式。

Runtime.getRuntime().exec("rundll32url.dll,FileProtocolHandler"+url);

}else{

//UnixorLinux的打开方式

String[]browsers={"firefox","opera","konqueror","epiphany","mozilla","netscape"};

Stringbrowser=null;

for(intcount=0;countbrowsers.lengthbrowser==null;count++)

//执行代码，在brower有值后跳出，

//这里是如果进程创建成功了，==0是表示正常结束。

if(Runtime.getRuntime().exec(newString[]{"which",browsers[count]}).waitFor()==0)

browser=browsers[count];

if(browser==null)

thrownewException("Couldnotfindwebbrowser");

else

//这个值在上面已经成功的得到了一个进程。

Runtime.getRuntime().exec(newString[]{browser,url});

}

}

}

//主方法测试类

publicstaticvoidmain(String[]args){

Stringurl="";

BareBonesBrowserLaunch.openURL(url);

}

登陆界面的java代码怎么写？

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import java.sql.*;

class LoginFrm extends JFrame implements ActionListener

{

JLabel lbl1=new JLabel("用户名");

JLabel lbl2=new JLabel("密码");

JTextField txt=new JTextField(15);

JPasswordField pf=new JPasswordField();

JButton btn1=new JButton("确定");

JButton btn2=new JButton("取消");

public LoginFrm()

{

this.setTitle("登陆");

JPanel jp=(JPanel)this.getContentPane();

jp.setLayout(new GridLayout(3,2,10,10));

jp.add(lbl1);jp.add(txt);

jp.add(lbl2);jp.add(pf);

jp.add(btn1);jp.add(btn2);

btn1.addActionListener(this);

btn2.addActionListener(this);

}

public void actionPerformed(ActionEvent ae)

{

if(ae.getSource()==btn1)

{

try

{

Class.forName("sun.jdbc.odbc.JdbcOdbcDriver")；

Connection con=DriverManager.getConnection("jdbc:odbc:MyDB","","");

Statement cmd=con.createStatement();

ResultSet rs=cmd.executeQuery("select * from loginAndpassword where login='"+txt.getText()+"' and password='"+pf.getText()+"'");

if(rs.next())

{

JOptionPane.showMessageDialog(null,"登陆成功！");

}

else

JOptionPane.showMessageDialog(null,"用户名或密码错误！");

} catch(Exception ex){}

if(ae.getSource()==btn2)

{

txt.setText("");

pf.setText("");

}

}

}

public static void main(String arg[])

{

JFrame.setDefaultLookAndFeelDecorated(true);

LoginFrm frm=new LoginFrm();

frm.setSize(400,200);

frm.setVisible(true);

}

}