在windows平台下换行符是 /r/n ,而在linux,android平台下换行符是 /n   ,所以取得的JSON字符串必须进行过滤,将/r/n替换成/n,

另外不建议使用 BasicResponseHandler() ,这样会导致乱码

两个重要函数:

public static String get(String urlString)  {
		
		/*try{
			HttpGet request = new HttpGet(urlString);
			String result=getHttpClient().execute(request,new BasicResponseHandler());
			return result;
		}catch(IOException e){
			throw e;
		}*/
		
		String result="";
		BufferedReader in=null;
		try {
		    HttpClient client = new DefaultHttpClient();
		    HttpGet request=new HttpGet(urlString);
		    HttpResponse response = client.execute(request);
		    
		    in=new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
		    StringBuffer sb=new StringBuffer("");
		    String line="";
		    String NL=System.getProperty("line.separator");
		   // String NL="";
		    while((line=in.readLine())!=null){
		    	sb.append(line+NL);
		    }
		    in.close();
		    result=sb.toString();
		    result=JsonFilter(result);
		} 
		catch (Exception e) {
			e.printStackTrace();
		}
		finally{
			if(in!=null){
				try{
					in.close();
				}catch(IOException e){
					e.printStackTrace();
				}
			}
		}
		return result;		
	}
	
	/*
	 * 对json字符串进行过滤,防止乱码和黑框
	 */
	public static String JsonFilter(String jsonstr){
		return jsonstr.substring(jsonstr.indexOf("{")).replace("\r\n","\n"); 
	}