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JAVA一步一步的WEB编程关于SERVLET〈二〉

时间:2009-12-23 15:42来源:未知 作者:admin 点击:
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上次说到Java一步一步的WEB编程关于jsp与JavaBean 现在说SERVLET,由与内容多所以分几章来说 SERVLET〈一〉 它与别的CGI程序不同的是,它有强大的J2EE做后,配合JSP,JAVABEAN,连接EJB, 等更高

  上次说到Java一步一步的WEB编程关于jsp与JavaBean
  现在说SERVLET,由与内容多所以分几章来说
  SERVLET〈一〉
  它与别的CGI程序不同的是,它有强大的J2EE做后,配合JSP,JAVABEAN,连接EJB,
  等更高一级的应用,这里慢慢说来,不同的SERVLET服务器配置,不同,现在就,语言本身STUDY
  这里有一些例子,先看看:
  
  
 
  //Hello.class
  import java.io.*;
  import javax.servlet.*;
  import javax.servlet.http.*;
  
  public class Hello extends HttpServlet {
  
   public void doGet(HttpServletRequest req, HttpServletResponse res)
   throws ServletException, IOException {
  
   res.setContentType("text/Html");
   PrintWriter out = res.getWriter();
  
   String name = req.getParameter("name");
   out.println("<HTML>");
   out.println("<HEAD><TITLE>Hello, " + name + "</TITLE></HEAD>");
   out.println("<BODY>");
   out.println("Hello, " + name);
   out.println("</BODY></HTML>");
   }
  
   public String getServletInfo() {
   return "A servlet that knows the name of the person to whom it's" +
   "saying hello";
   }
  }
  //HelloWorld.class
  //-------------------------------
  import java.io.*;
  import javax.servlet.*;
  import javax.servlet.http.*;
  
  public class HelloWorld extends HttpServlet {
  
   public void doGet(HttpServletRequest req, HttpServletResponse res)
   throws ServletException, IOException {
  
   res.setContentType("text/html");
   PrintWriter out = res.getWriter();
  
   out.println("<HTML>");
   out.println("<HEAD><TITLE>Hello World</TITLE></HEAD>");
   out.println("<BODY>");
   out.println("<BIG>Hello World</BIG>");
   out.println("</BODY></HTML>");
   }
  }
  //
  ------------------------
  //form.html
  
  <HTML>
  <HEAD>
  <TITLE>IntrodUCtions</TITLE>
  </HEAD>
  <BODY>
  <FORM METHOD=GET ACTION="/servlet/Hello">
  If you don't mind me aSKINg, what is your name?
  <INPUT TYPE=TEXT NAME="name"><P>
  <INPUT TYPE=SUBMIT>
  </FORM>
  </BODY>
  </HTML>
  先配置一下,
  
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