?? rot13.java
字號:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Rot13 extends HttpServlet {
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
String text = req.getParameter("text");
String translation = translate(text);
res.setContentType("text/html");
ServletOutputStream out = res.getOutputStream();
out.println("<html>");
out.println("<body>");
out.println("<head><title>ROT-13 Translator</title></head>");
out.println("<h1>ROT-13 Translator</h1>");
out.println("<p>Text to translate:");
out.println("<form action=\"Rot13\" method=\"POST\">");
out.println("<textarea name=\"text\" ROWS=8 COLS=55>");
out.println(translation);
out.println("</textarea>");
out.println("<p><input type=\"submit\" value=\"translate\">");
out.println("</form>");
out.println("</body>");
out.println("</html>");
}
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
doPost(req, res);
}
String translate(String input) {
StringBuffer output = new StringBuffer();
if (input != null) {
for (int i = 0; i < input.length(); i++) {
char inChar = input.charAt(i);
if ((inChar >= 'A') & (inChar <= 'Z')) {
inChar += 13;
if (inChar > 'Z')
inChar -= 26;
}
if ((inChar >= 'a') & (inChar <= 'z')) {
inChar += 13;
if (inChar > 'z')
inChar -= 26;
}
output.append(inChar);
}
}
return output.toString();
}
}
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