📄 hello.java
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import amzi.ls.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class Hello extends HttpServlet
{
//Initialize global variables
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
// Process the HTTP Get request
public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
ServletOutputStream out = response.getOutputStream();
// set content type and other response header fields first
response.setContentType("text/html");
out.println("<HEAD><TITLE> Hello Java Servlet </TITLE></HEAD><BODY>");
out.println("<h1><FONT COLOR=BLUE> Hello Java Servlet </FONT></h1>");
out.println("<form method=post action=\"/servlet/Hello\">");
out.println("<p>Enter full pathname for HELLO.XPL (use double backslashes-do not include hello.xpl or a trailing slash): ");
out.println("<input name=\"path\" type=text rows=1 size=50>");
out.println("<p><input name=submit type=submit></form>");
out.println("</BODY>");
out.close();
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
{
long term;
String result, path;
response.setContentType("text/html");
PrintWriter out = new PrintWriter (response.getOutputStream());
out.println("<html>");
out.println("<head><title>Hello</title></head>");
try
{
LogicServer ls = new LogicServer();
ls.Init("");
if ( (path = request.getParameter("path")) == null) path = "";
path = path + "\\hello.xpl";
ls.Load(path);
term = ls.ExecStr("hello($Java Programmer$, Response)");
if (term == 0)
out.println("Hello Failed");
else
{
result = ls.GetStrArg(term, 2);
out.println(result);
}
ls.Close();
}
catch (LSException ex)
{
out.println("Logic Server Exception: " + ex.getMessage());
}
out.println("<body>");
out.println("</body></html>");
out.close();
}
//Get Servlet information
public String getServletInfo()
{
return "Hello Information";
}
}
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