FileUtils扩展readURLtoString读取url内容

/**
  * 因为fileutils不支持，所以添加个方法 string content =
  * fileutils.readfiletostring(fileutils.tofile(new
  * url("http://www.baidu.com")));
  *
  * @param source
  * @param encoding
  * @return
  * @throws ioexception
  */
 public static string readurltostring(url source) throws ioexception {
  return readurltostring(source,null);
 }
 /**
  * 因为fileutils不支持，所以添加个方法
  *
  * <pre>
  * string content = fileutils.readfiletostring(fileutils.tofile(new url(
  *   "http://www.baidu.com")), "gb2312");
  * </pre>
  *
  * @param source
  * @param encoding
  * @return
  * @throws ioexception
  */
 public static string readurltostring(url source, string encoding)
   throws ioexception {
  inputstream input = source.openstream();
  try {
   return ioutils.tostring(input, encoding);
  } finally {
   ioutils.closequietly(input);
  }
 }
 /**
  * 读取url的内容(method为post，可指定多个参数)
  * @param url
  * @param encoding
  * @param params map的参数(key为参数名,value为参数值)
  * @return string
  * @throws ioexception
  */
 public static string readurltostringbypost(url url, string encoding,map<string, string> params)
 throws ioexception {
  httpurlconnection con = null;
  // 构建请求参数
  stringbuffer sb = new stringbuffer();
  if (params != null) {
   for (entry<string, string> e : params.entryset()) {
    sb.append(e.getkey());
    sb.append("=");
    sb.append(e.getvalue());
    sb.append("&");
   }
   if(sb.length()>0){
    sb.substring(0, sb.length() - 1);
   }
  }
  // 尝试发送请求
  try {
   con = (httpurlconnection) url.openconnection();
   con.setrequestmethod("post");
   con.setdooutput(true);
   con.setdoinput(true);
   con.setusecaches(false);
   con.setrequestproperty("content-type","application/x-www-form-urlencoded");
   outputstreamwriter osw = new outputstreamwriter(con.getoutputstream(),encoding);
   if (params != null) {
    osw.write(sb.tostring());
   }
   osw.flush();
   osw.close();
  } catch (exception e) {
   logfactory.getlog(fileutils.class).error("post("+url.tostring()+")error("+e.getmessage()+")",e);
  } finally {
   if (con != null) {
    con.disconnect();
   }
  }
  // 读取返回内容
  stringbuffer buffer = new stringbuffer();
  try {
   bufferedreader br = new bufferedreader(new inputstreamreader(con
     .getinputstream(),encoding));
   string temp;
   while ((temp = br.readline()) != null) {
    buffer.append(temp);
    buffer.append("\n");
   }
  } catch (exception e) {
   e.printstacktrace();
  }

  return buffer.tostring();
 }