下面的代码我在本机（win7）能成功运行，但是在Linux服务器上运行报错:

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;


public class TestMail {

	public static void main(String[] args) {
		StringBuffer document = new StringBuffer();
		try {
			URL url = new URL("http://localhost:8111/test/jsp/index.jsp?user_id=1052&cycle=0");
			URLConnection conn = url.openConnection();
			InputStream is = conn.getInputStream();
			InputStreamReader isr =new InputStreamReader(is,"UTF-8");
			BufferedReader reader = new BufferedReader(isr);
			String line = null;
			while ((line = reader.readLine()) != null)
			document.append(line + "\r\n");
			reader.close();
			isr.close();
			is.close();
			writerFile("/home", "test112.html", document.toString());
			System.out.println(conn);
			System.out.println("测试url.openConnection！");
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			System.out.println("111");
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			System.out.println("222");
			e.printStackTrace();
		} 
	}

	public static int writerFile(String path, String fileName, String content) {
		String pathFileName = path + File.separator + fileName;
		File fpath = new File(path);

		int ok = 0;
		try {
			if (!fpath.exists()) {
				fpath.mkdirs();
			}
			FileOutputStream fileOutputStream = new FileOutputStream(
					pathFileName);
			OutputStreamWriter outputStreamWriter = new OutputStreamWriter(
					fileOutputStream, "utf-8");
			outputStreamWriter.write(content.toString());
			outputStreamWriter.close();
			fileOutputStream.close();
		} catch (Exception e) {
			e.printStackTrace();

		} finally {
		}
		return ok;
	}

}

报错信息：
222
java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:529)
        at java.net.Socket.connect(Socket.java:478)
        at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:395)
        at sun.net.www.http.HttpClient.openServer(HttpClient.java:530)
        at sun.net.www.http.HttpClient.<init>(HttpClient.java:234)
        at sun.net.www.http.HttpClient.New(HttpClient.java:307)
        at sun.net.www.http.HttpClient.New(HttpClient.java:324)
        at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970)
        at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911)
        at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836)
        at TestMail.main(TestMail.java:21)

各路大神请帮忙啊，感谢！