CRLFOutputStream.java
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上传用户:dinglihq
上传日期:2013-02-04
资源大小:99958k
文件大小:3k
源码类别:
Java编程
开发平台:
Java
- /*
- * @(#)CRLFOutputStream.java 1.3 01/05/23
- *
- * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistribution in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
- * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES OR LIABILITIES
- * SUFFERED BY LICENSEE AS A RESULT OF OR RELATING TO USE, MODIFICATION
- * OR DISTRIBUTION OF THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
- * SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
- * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS
- * BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that Software is not designed, licensed or intended
- * for use in the design, construction, operation or maintenance of any
- * nuclear facility.
- */
- import java.io.*;
- /**
- * Convert lines into the canonical MIME format, that is,
- * terminate lines with CRLF. <p>
- *
- * This stream can be used with the Part.writeTo and Message.writeTo
- * methods to generate the canonical MIME format of the data for the
- * purpose of (e.g.) sending it via SMTP or computing a digital
- * signature.
- */
- public class CRLFOutputStream extends FilterOutputStream {
- protected int lastb = -1;
- protected static byte[] newline;
- static {
- newline = new byte[2];
- newline[0] = (byte)'r';
- newline[1] = (byte)'n';
- }
- public CRLFOutputStream(OutputStream os) {
- super(os);
- }
- public void write(int b) throws IOException {
- if (b == 'r') {
- out.write(newline);
- } else if (b == 'n') {
- if (lastb != 'r')
- out.write(newline);
- } else {
- out.write(b);
- }
- lastb = b;
- }
- public void write(byte b[]) throws IOException {
- write(b, 0, b.length);
- }
- public void write(byte b[], int off, int len) throws IOException {
- int start = off;
- len += off;
- for (int i = start; i < len ; i++) {
- if (b[i] == 'r') {
- out.write(b, start, i - start);
- out.write(newline);
- start = i + 1;
- } else if (b[i] == 'n') {
- if (lastb != 'r') {
- out.write(b, start, i - start);
- out.write(newline);
- }
- start = i + 1;
- }
- lastb = b[i];
- }
- if ((len - start) > 0)
- out.write(b, start, len - start);
- }
- }