Applet与Servlet通讯 (片段源码)

最新推荐文章于 2025-01-19 22:54:53 发布

原创最新推荐文章于 2025-01-19 22:54:53 发布 · 282 阅读

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CC 4.0 BY-SA版权

文章标签：

#servlet #applet #通讯 #string #import #google

本文介绍了一种Applet与Servlet进行数据交换的方法，并提供了实际使用的源代码示例。通过此方法，Applet可以发送HTTP请求给Servlet，而Servlet则处理请求并返回响应。文章详细展示了如何设置请求参数及读取响应数据。

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showStatus(textField1.getText());

URL servlet = new URL(this.getDocumentBase(),"servlet/GetParameterServlet");

URLConnection connection = servlet.openConnection();

connection.setUseCaches(false);

connection.setDoOutput(true);

ByteArrayOutputStream byteStream = new ByteArrayOutputStream(1024);

PrintWriter out = new PrintWriter(byteStream, true);

String postData = "Name="   URLEncoder.encode(textField1.getText());

out.print(postData);

out.flush();

String lengthString = String.valueOf(byteStream.size());

connection.setRequestProperty("Content-Length", lengthString);

connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

byteStream.writeTo(connection.getOutputStream());

BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

textArea1.setText("");

String s;

for(; (s = br.readLine()) != null && s.length() > 0; textArea1.appendText(s   "/n"));

   ...

Servlet source



// GetParameterServlet

import java.io.*;

import javax.servlet.*;

import javax.servlet.http.*;

import java.util.*;





public class GetParameterServlet extends HttpServlet {

  public void doGet(HttpServletRequest request,

                    HttpServletResponse response)

      throws ServletException, IOException {

    response.setContentType("text/html");

    

    PrintWriter out = response.getWriter();

    String title = "Reading Request Parameters";

    String name = request.getParameter("Name");

    out.println(title);

    out.println("Hello: "   name );    

    

  }



  public void doPost(HttpServletRequest request,

                     HttpServletResponse response)

      throws ServletException, IOException {

    doGet(request, response);

  }

}

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