当前位置：网站首页>Programming technology of Servlet

Programming technology of Servlet

2022-07-21 23:38:00 【Crazy beauty is stupid】

One 、 The experiment purpose

understand Servlet How it works , master Servlet Application development method of ; Master common Servlet ;

Two 、 The experimental requirements

understand Servlet Application .
master Servlet The programming technology of the .
Skillfully use Eclipse Development Servlet application

3、 ... and 、 Experimental content

（ One ） use Servlet Get form data

Build a Servlet file accept.java And a register.jsp file , To achieve Servlet Realize the function of obtaining form data .

Program function ： utilize Servlet To achieve the acquisition of form data .
Reference source code ：

accept.java

import java.io.*; import javax.servlet.*;

import javax.servlet.http.*;

public class acceptUserRegist extends HttpServlet

{

public String codeToString(String str)

{// Functions for processing Chinese strings String s=str;

try

{

byte tempB[]=s.getBytes("ISO-8859-1"); s=new String(tempB);

return s;

}

catch(Exception e)

{

return s;

}

public void init(ServletConfig config) throws ServletException

{

super.init(config);

}

response)

public void doPost(HttpServletRequest request,HttpServletResponse

throws ServletException,IOException

{

// set up Set up mime response.setContentType("text/html;charset=GB2312"); PrintWriter out=response.getWriter();

out.println("<HTML><head><title> Receive new user registration

</title></head><BODY>");

out.println(" This is the data submitted by the new user registration ：<br>");

out.println(" use Household name yes ： "+codeToString(request.getParameter("username"))+"<br>");

out.println(" The secret code yes ： "+codeToString(request.getParameter("userpassword"))+"<br>");

out.println(" sex other yes ： "+codeToString(request.getParameter("sex"))+"<br>");

out.println(" Out raw year month yes ： "+request.getParameter("year")+request.getParameter("month")+request.getParamet er("day")+"<br>");

out.println(" The email address is ："+request.getParameter("email")+"<br>");

out.println(" home Court live site yes ： "+codeToString(request.getParameter("address"))+"<br>");

out.println("</body> </html>");

}

register.jsp

<%@ page contentType="text/html;charset=gb2312"%>

{// Verify the validity of the data

if (form1.username.value == "")

{

alert(" The username cannot be empty , Please enter a user name ！"); form1.username.focus();

return false;

}

if (form1.userpassword.value == "")

{

alert(" User password cannot be empty , Please input a password ！"); form1.userpassword.focus();

return false;

}

if (form1.reuserpassword.value == "")

{

alert(" The user confirmation password cannot be empty , Please input a password ！"); form1.reuserpassword.focus();

return false;

}

if (form1.userpassword.value != form1.reuserpassword.value)

{

alert(" The password is different from the confirmation password "); form1.userpassword.focus(); return false;

}

if (form1.email.value.length!= 0)

{

for (i=0; i<form1.email.value.length; i++) if (form1.email.value.charAt(i)=="@")

break;

if (i==form1.email.value.length)

{

else

{

alert(" illegal EMail Address ！"); form1.email.focus(); return false;

}

alert(" Please enter Email！"); form1.email.focus(); return false;

}

</script>

<html>

<head>

<title> New user registration </title>

</head>

<body>

New user registration <br>

user name (*)：<input type="text" name="username" size="20"><br>

The secret ; code (*)：<input type="password" name="userpassword" size="20"><br> Enter the password again (*)：<input type="password" name="reuserpassword" size="20"><br> Gender ：<input type="radio" value=" male " checked name="sex"> male <input type="radio"

name="sex" value=" Woman "> Woman <br>

date of birth ：<input name="year" size="4" maxlength=4> year

</select> month

<input name="day" size="3" maxlength=4> Japan <br>

email (*)：<input name="email" maxlength=28><br>

Home address ：<input type="text" name="address" size="20"><br>

</form>

</body>

</html>