一、讀取思路

1.使用InputStream物件構造InputStreamReader

2.使用InputStreamReader物件構造BufferedReader物件

3.構造一個StringBuilder物件，用來接收BufferedReader中的資料

二、原始碼

@Test
	public void test3() throws Exception, IOException{
		
		CloseableHttpClient httpclient = HttpClients.createDefault();
		HttpGet httpget = new HttpGet("url");
		CloseableHttpResponse response = httpclient.execute(httpget);
		try {
			HttpEntity entity = response.getEntity();
			if (entity != null) {
				//建立一個輸入流物件
				 InputStream instream = entity.getContent();
				
				 BufferedReader reader = new BufferedReader(new InputStreamReader(instream));   
				 StringBuilder sb = new StringBuilder();   
			     String line = null;   
			     while ((line = reader.readLine()) != null) { 
			    	 sb.append(line + "\n");   
			     }
			     instream.close(); 
			     System.out.println(sb.toString());

			     //如何從InputStream中讀取資料到字串
				//從輸入流中讀取資料
				/*int byteOne = instream.read();
				int byteTwo = instream.read();
				System.out.println(byteOne);
				System.out.println(byteTwo);*/
				
			}
		 } finally {
			 response.close();
		 }
	}