inputStream 、outputStream、String互相轉化

一、OutputStream寫入String

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

二、字元串轉inputStream

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

三、.InputStream轉字元串

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

四、String寫入OutputStream

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

五、OutputStream  與 InputStream 互轉

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;
	}