java将流转为字符串

	public String  stream2String(InputStream is) throws IOException {
		
		StringBuilder str = new StringBuilder();
		
		BufferedReader reader = new BufferedReader(new InputStreamReader(is));
		
		String line=null;
		
		while ((line=reader.readLine())!=null) {
			
			str.append(line);
			
			System.out.println(line);
			
			System.out.println("**********************************************");
			
		}
                return str.toString();
		
	}