如何通过访问某一个网页上的一个下载链接下载文件到本地呢？我学习了一下，利用httpget1，httpResponse1来判断网络是否连接访问成功，又通过httpget2，httpResponse2来访问下载链接实现文件下载。

注意：在使用httpget2之前需使用语句“ httpget1.abort();”将get1关闭，否则会报异常。

/* 下载文件 @param urlsrc 网页地址  @param outPath 文件输出路径 */  @SuppressWarnings({ "resource" })  public static String DownLoadPages(String urlsrc, String outpath) throws UnknownHostException  {  	// 输入流   	InputStream in = null;  	// 文件输出流  	FileOutputStream out = null;  	try{   		HttpParams httpParams = new BasicHttpParams();  		HttpConnectionParams.setConnectionTimeout(httpParams,5000); //设置连接超时为5秒  		HttpClient client = new DefaultHttpClient(httpParams); // 生成一个http客户端发送请求对象  		HttpGet httpget1 = new HttpGet(urlsrc); //对查询页面get  		HttpResponse httpResponse1 = client.execute(httpget1); // 发送请求并等待响应  		// 判断网络连接是否成功  		System.out.println("状态码："+httpResponse1.getStatusLine().getStatusCode());  		if (httpResponse1.getStatusLine().getStatusCode() != 200)  			System.out.println("网络错误异常！!!!");  		else  			System.out.println("网络连接成功!!!");  		httpget1.abort(); //关闭get  		HttpGet httpget2 = new HttpGet("http://....../download? DownloadFileName=All=true"); //对下载链接get实现下载  		HttpResponse httpResponse2 = client.execute(httpget2);  		HttpEntity entity = httpResponse2.getEntity(); // 获取响应里面的内容  		in = entity.getContent(); // 得到服务气端发回的响应的内容（都在一个流里面）  		out = new FileOutputStream(new File(outpath));   		byte[] b = new byte[1024];   		int len = 0;   		while((len=in.read(b))!= -1){   			out.write(b,0,len);   		}   		in.close();   		out.close();    		}catch(Exception e){    			e.printStackTrace();  		}  	}  	System.out.println("download, success!!");   }  public static void main(String[] args) throws Exception {  	String urlsrc="http://......//"; //要访问的链接  	String outPath="//...//..."； //本地路径  	DownLoadPages(src,outpath);  }