inputStream 、outputStream、String相互转化

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一、OutputStream写入String

ByteArrayOutputStream baos = new ByteArrayOutputStream();//向OutPutStream中写入，如 message.writeTo(baos);String str = baos.toString();

二、字符串转inputStream

String string;  //  InputStream is = new ByteArrayInputStream(string.getBytes());

三、.InputStream转字符串

ByteArrayOutputStream baos = new ByteArrayOutputStream();  int i;  while ((i = is.read()) != -1) {      baos.write(i);  }  String str = baos.toString();  System.out.println(str);

四、String写入OutputStream

OutputStream os = System.out;  os.write(string.getBytes());

五、OutputStream 与 InputStream 互转

public InputStream inputStreamToOutPut(OutputStream os){InputStream is = new ByteArrayInputStream(os.toString().getBytes());return is;}

六、InputStream to byte[]

public static final byte[] input2byte(InputStream inStream)              throws IOException {          ByteArrayOutputStream swapStream = new ByteArrayOutputStream();          byte[] buff = new byte[100];          int rc = 0;          while ((rc = inStream.read(buff, 0, 100)) > 0) {              swapStream.write(buff, 0, rc);          }          byte[] in2b = swapStream.toByteArray();          return in2b;      }

七、byte[] to InputStream

public static InputStream byteToInputStream(byte[] buf){InputStream sbs = new ByteArrayInputStream(buf); return sbs;}

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