基于jsp的网站代码示例,jsp编写

本文目录一览：

• 
  1、需要一个可以运行的JSP简单代码？
  


• 
  2、jsp 中网站的首页源代码
  


• 
  3、jsp登陆界面源代码
  


• 
  4、求大神写一下jsp的简单的注册界面代码。
  

需要一个可以运行的JSP简单代码？

%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%

%

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

base href="%=basePath%"

titleMy JSP 'index.jsp' starting page/title

meta http-equiv="pragma" cOntent="no-cache"

meta http-equiv="cache-control" cOntent="no-cache"

meta http-equiv="expires" cOntent="0"

meta http-equiv="keywords" cOntent="keyword1,keyword2,keyword3"

meta http-equiv="description" cOntent="This is my page"

!--

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

--

/head

body

This is my JSP page. br

/body

/html

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"

titleJSP连接Access数据库/title

style type="text/css"

!--

.style1 {

font-size: 20px;

font-weight: bold;

}

--

/style

/headbody

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 border="1" align="center" bordercolor="#7188e0"

tr bgcolor="d1d1ff"

th 编号/th

th 姓名/th

th E-mail/th

th 网站/th

th 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

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

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

tdinput type="submit" value="登录" input

type="reset" value="重置" /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身份验证/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登录成功/title

/head

body

%

request.setCharacterEncoding("GB18030");

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://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" ""

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 4.01 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" align="left" color="green"

font size="6" color="red" 登录成功 /font

hr size="10" 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登录界面/title

/head

body  background="C:\Users\win8\workspace\Login\image\9dcbdc339e72a5663b5c289fb5573c13_10.jpg"

center

brbrbrbrbrbr

h1 Login/h1

br

form name="loginForm" action="login_check.jsp" method="post" 

table Border="0"

tr

td账号/td

tdinput type="text" name="username"/td

/tr

tr

td密码/td

tdinput type="password" name="password"

/td

/tr

/table

br

input type="submit" value="登录"

/form

/center

/body

/html

求大神写一下jsp的简单的注册界面代码。

1.需要一个jsp页面：

//login.jsp核心代码：

form action="${pageContext.request.contextPath}/servlet/UserServlet" method="post"

input type="text" name="loginname" /input type="password" name="password"/

input type="submit" value="登录"/

/form

2.需要一个servlet来验证登录信息

//UserServlet 核心代码

class UserServlet extends HttpServlet{

protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {

process(request, response);

}

protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {

process(request, response);

}

private void process(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {

PrintWriter pw = response.getWriter();

request.setCharacterEncoding("UTF-8");

response.setContentType("text/html");

String loginname = request.getParameter("loginname");

String password = request.getParameter("password");

//创建一个service来处理业务逻辑（包括查询数据库操作）

UserService service = new UserService();

boolean bool = service.validateUser(loginname,password);

if(!bool){

pw.println("用户名或密码错误");

}else{

pw.println("登录成功");

}

}

3.需要一个service处理业务逻辑（包括查询数据库操作）

//UserService 核心代码

public class UserService{

/**

*查询数据库验证用户是否存在，返回boolean

*/

public boolean validateUser(String loginname,String password){

boolean bool = false;

Connection cOnn= null;

PreparedStatement ps = null;

//这里以mysql为例

try {

Class.forName("com.mysql.jdbc.Driver").newInstance();

cOnn= DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "");

String sql = "select login_name,pass_word from t_user where login_name=? and pass_word=?";

ps = conn.prepareStatement(sql);

ps.setString(0, loginname);

ps.setString(1, password);

ResultSet rs = ps.executeQuery();

if(rs.next()){

bool = true;

}

} catch (Exception e) {

e.printStackTrace();

} finally{

try {

if(conn != null){

conn.close();

cOnn= null;

}

if(ps != null){

ps.close();

ps = null;

}

} catch (SQLException e) {

e.printStackTrace();

}

}

return bool;

}

}