displayservlet.java

来自「Begining JSP Web Development外文书籍源代码」· Java 代码 · 共 36 行

JAVA
36
字号
package com.wrox.servlets;

import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class DisplayServlet extends HttpServlet {

  public void doGet(HttpServletRequest req, HttpServletResponse res) 
          throws ServletException, IOException {
    res.setContentType("text/html");
    PrintWriter out = res.getWriter();
    out.println("<html><head><title>Example</title></head><body>");
    out.println("Query String being processed:<p>");
    out.println(req.getQueryString());
    out.println("<p>");
    out.println("Request Parameters:<p>");

    Enumeration enumParam = req.getParameterNames();
    while (enumParam.hasMoreElements()) {
      String paramName = (String) enumParam.nextElement();
      String paramValues[] = req.getParameterValues(paramName);
      if (paramValues != null) {
        for (int i = 0; i < paramValues.length; i++) {
          out.println(paramName + " (" + i + "): " + paramValues[i] 
                      + "<p>");
        } 
      } 
    } 
    out.println("</body></html>");
    out.close();
  } 
}

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