程序员网: JAVA一步一步的WEB编程关于SERVLET〈二〉

JAVA一步一步的WEB编程关于SERVLET〈二〉

04:50

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，注意，SERVLET CLASS 放在，servlets 下，访问时，servlet下访问
我这里简单放在examples下了
C:\jakarta-tomcat-3.3a\webapps\examples\WEB-INF\classes\上面的CLASS
访问的SERVLET class 如下
http://localhost:8080/examples/servlet/...

写于02年10月 newless <淘宝热门商品：