将Http请求输入流转化为字符串工具类StreamHelper

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;

public class StreamHelper {
/**
* 将一个输入流转化为字符串
*/
public static String getStringFromStream(InputStream tInputStream){
if (tInputStream != null){
try{
BufferedReader tBufferedReader = new BufferedReader(new InputStreamReader(tInputStream));
StringBuffer tStringBuffer = new StringBuffer();
String sTempOneLine = new String("");
while ((sTempOneLine = tBufferedReader.readLine()) != null){
tStringBuffer.append(sTempOneLine);
}
if(tStringBuffer.length() != 0){
return tStringBuffer.toString();
}
}catch (Exception ex){
ex.printStackTrace();
}
}
return null;
}

/**
* 将一个字符串转化为输入流
*/
public static InputStream getStreamFromString(String sInputString){
if (sInputString != null && !sInputString.trim().equals("")){
try{
ByteArrayInputStream tInputStringStream = new ByteArrayInputStream(sInputString.getBytes());
return tInputStringStream;
}catch (Exception ex){
ex.printStackTrace();
}
}
return null;
}
}