Java Tutorial/Email/Formatter
Convert lines into the canonical MIME format, that is, terminate lines with CRLF
<source lang="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.FilterOutputStream; import java.io.IOException; import java.io.OutputStream; /**
* Convert lines into the canonical MIME format, that is, terminate lines with * CRLF.*
* * 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); } }</source>
Convert the various newline conventions to the local platform"s newline convention
<source lang="java">
/*
* @(#)NewlineOutputStream.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.FilterOutputStream; import java.io.IOException; import java.io.OutputStream; /**
* Convert the various newline conventions to the local platform"s newline * convention. * <P> * * This stream can be used with the Message.writeTo method to generate a message * that uses the local plaform"s line terminator for the purpose of (e.g.) * saving the message to a local file. */
public class NewlineOutputStream extends FilterOutputStream {
private int lastb = -1;
private static byte[] newline;
public NewlineOutputStream(OutputStream os) {
super(os);
if (newline == null) {
String s = System.getProperty("line.separator");
if (s == null || s.length() <= 0)
s = "\n";
newline = new byte[s.length()];
s.getBytes(0, s.length(), newline, 0);
}
}
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 {
for (int i = 0; i < len; i++) {
write(b[off + i]);
}
}
}</source>
