输入流转输出流

public class IOUtil {/*** inputStream转outputStream，输入流转输出流** @param inputStream 输入流* @return 返回输出流* @throws IOException*/public static ByteArrayOutputStream parse(InputStream inputStream) throws IOException {ByteArrayOutputStream swapStream = new ByteArrayOutputStream();int ch;while ((ch = inputStream.read()) != -1) {swapStream.write(ch);}return swapStream;}/*** outputStream转inputStream，输出流转输入流** @param out 输出流* @return 输入流*/public static ByteArrayInputStream parse(OutputStream out) {ByteArrayOutputStream baos = new ByteArrayOutputStream();baos = (ByteArrayOutputStream) out;ByteArrayInputStream swapStream = new ByteArrayInputStream(baos.toByteArray());return swapStream;}/*** 关闭inputStream** @param in inputStream*/public static void close(InputStream in) {if (null != in) {try {in.close();} catch (IOException e) {log.error("close inputStream error", e);}}}/*** 关闭reader** @param reader reader*/public static void close(Reader reader) {if (null != reader) {try {reader.close();} catch (IOException e) {log.error("close reader error", e);}}}/*** 关闭OutputStream** @param out OutputStream*/public static void close(OutputStream out) {if (null != out) {try {out.close();} catch (IOException e) {log.error("close OutputStream error", e);}}}/*** 关闭writer** @param writer writer*/public static void close(Writer writer) {if (null != writer) {try {writer.close();} catch (IOException e) {log.error("close writer error", e);}}}}