照着Java Servlet开发与实例的程序清单4.1和4.2写的。
初学者一定要注意修改项目中web-inf目录下的web.xml文件，添加以下内容，不然会出错
<servlet> <servlet-name>***</servlet-name> <servlet-class>包.类名称</servlet-class> </servlet> <servlet-mapping> <servlet-name>***</servlet-name> <url-pattern>/路径名称/**</url-pattern> </servlet-mapping>
BasicServlet.java
package servlet;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.Enumeration;
public class BasicServlet extends HttpServlet{
/**
*
*/
private static final long serialVersionUID = 1L;
public void init(ServletConfig config)
throws ServletException{
super.init(config);
}
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException,IOException{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
out.println("<html>");
out.println("<head><title>BasicServlet</title></head>");
out.println("<body>");
out.println("Your request method was "+request.getMethod()+"\n");
Enumeration parameters=request.getParameterNames();
String param=null;
while(parameters.hasMoreElements()){
param=(String)parameters.nextElement();
out.println("<b>"+param+":"+request.getParameter(param)+"</b><br>");
}
out.println("</body></html>");
out.close();
}
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException,IOException{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
out.println("<html>");
out.println("<head><title>BasicServlet</title></head>");
out.println("<body>");
out.println("Your request method was "+request.getMethod()+"\n");
Enumeration parameters=request.getParameterNames();
String param=null;
while(parameters.hasMoreElements()){
param=(String)parameters.nextElement();
out.println("<b>"+param+":"+request.getParameter(param)+"</b><br>");
}
out.println("</body></html>");
out.close();
}
public String getServlerInfo(){
return "BasicServlet Information";
}
}
Form.html
<html> <head> <title>Form</title> </head> <body> <form action=http://localhost:8080/BasicServlet/servlet.BasicServlet method=POST> <table style="height:173px; width:300px"> <tr> <td>Last Name:</td> <td><input type=text name="LastName" align="left" size="15"></td> </tr> <tr> <td>First Name:</td> <td><input type=text name="FirstName" align=left size=15> </td> </tr> <tr> <td>SSN:</td> <td><input type=text align=left name=SSN size=11> </td> </tr> <tr> <td>DOB:</td> <td><input type=text align=left name=DOB size=8> </td> </tr> <tr> <td>Username:</td> <td><input type=text align=left name=Username> </td> </tr> <tr> <td>Password:</td> <td><input type=password align=left name=Password size=8> </td> </tr> </table> <input type="submit" name="Submit" value="Submit"> <input type="reset" value="Reset"> </form> </body> </html>