要用Apache的包，必須新增這些包進去才可以。下載後解壓後，放入程式的libs中。

客戶端程式：

package lgx.java.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

public class HttpClientGet {
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// 使用get方法連線伺服器
		HttpGet httpGet = new HttpGet("http://192.168.1.48:8080/Test/test.jpg");
		HttpClient client = new DefaultHttpClient();
		FileOutputStream fos;
		try {
			// 客戶端開始向指定的網址傳送請求
			HttpResponse response = client.execute(httpGet);
			InputStream inputStream = response.getEntity().getContent();
			File file = new File("D:\\jj");
			if (!file.exists()) {
				file.mkdirs();
			}

			fos = new FileOutputStream("D:\\jj\\test.jpg");
			byte[] data = new byte[1024];
			int len = 0;
			while ((len = inputStream.read(data)) != -1) {
				fos.write(data, 0, len);
			}

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
	}

}
 

兩個文章大同小異，不過一個是用的java介面實現，一個是Apache的介面實現