获取HttpURLConnection 响应体内容

private static byte[] connection(HttpURLConnection huc, byte[] sendBytes,
String mode) throws Exception {
if (mode.equalsIgnoreCase("POST") && sendBytes != null) {
huc.getOutputStream().write(sendBytes);
huc.getOutputStream().flush();
huc.getOutputStream().close();
}

int resCode = huc.getResponseCode();

if (resCode == HttpURLConnection.HTTP_OK) {
int contentLength = huc.getContentLength();
InputStream in = huc.getInputStream();
if (contentLength > 0) {
System.out.println("httputil,contentLength:"+contentLength);
//				return readData(huc);
return readDataFromLength(in, contentLength);
} else {
return readData(in);
}
}
return null;
}

private static byte[] readData(InputStream in) throws Exception {

return FileUtils.readBytes(in);

}

private static byte[] readDataFromLength(InputStream in,
int contentLength) throws Exception {
BufferedInputStream bis = new BufferedInputStream(in);

// 数据字节数组
byte[] receData = new byte[contentLength];
int readLength = 0;
// 数据数组偏移量
int offset = 0;

readLength = bis.read(receData, offset, contentLength);
// 已读取的长度
int readAlreadyLength = readLength;
while (readAlreadyLength < contentLength) {
readLength = bis.read(receData, readAlreadyLength, contentLength-readAlreadyLength);
readAlreadyLength = readAlreadyLength + readLength;
}

return receData;
}

private static String connection(HttpURLConnection huc, byte[] sendBytes,
String mode) throws Exception {
if (mode.equalsIgnoreCase("POST") && sendBytes != null) {
huc.getOutputStream().write(sendBytes);
huc.getOutputStream().flush();
huc.getOutputStream().close();
}

int resCode = huc.getResponseCode();

if (resCode == HttpURLConnection.HTTP_OK) {
int contentLength = huc.getContentLength();
InputStream in = huc.getInputStream();
if (contentLength > 0) {
System.out.println("httputil,contentLength:"+contentLength);
//				return readData(huc);
return readDataFromLength(in, contentLength);
} else {
return readData(in);
}
}
return null;
}

private static String readData(InputStream in) throws Exception {

return IOUtils.toString(in, "ISO-8859-1");

}

private static String readDataFromLength(InputStream in,
int contentLength) throws Exception {
InputStreamReader isr = new InputStreamReader(in);
BufferedReader reader = new BufferedReader(isr);
StringBuffer sb = new StringBuffer();

String line = null;
String resultString = "";
while ((line = reader.readLine()) != null) {
sb.append(line);
}
resultString = sb.toString();
reader.close();
isr.close;
return resultString;
}