import javax.servlet.http.Cookie; //導入方法依賴的package包/類

/** Return the header value used to set this cookie

*/

public static void getCookieHeaderValue(Cookie cookie, StringBuffer buf) {

int version = cookie.getVersion();

// this part is the same for all cookies

String name = cookie.getName(); // Avoid NPE on malformed cookies

if (name == null)

name = "";

String value = cookie.getValue();

if (value == null)

value = "";

buf.append(name);

buf.append("=");

maybeQuote(version, buf, value);

// add version 1 specific information

if (version == 1) {

// Version=1 ... required

buf.append (";Version=1");

// Comment=comment

if (cookie.getComment() != null) {

buf.append (";Comment=");

maybeQuote (version, buf, cookie.getComment());

}

}

// add domain information, if present

if (cookie.getDomain() != null) {

buf.append(";Domain=");

maybeQuote (version, buf, cookie.getDomain());

}

// Max-Age=secs/Discard ... or use old "Expires" format

if (cookie.getMaxAge() >= 0) {

if (version == 0) {

buf.append (";Expires=");

if (cookie.getMaxAge() == 0)

DateTool.oldCookieFormat.format(new Date(10000), buf,

new FieldPosition(0));

else

DateTool.oldCookieFormat.format

(new Date( System.currentTimeMillis() +

cookie.getMaxAge() *1000L), buf,

new FieldPosition(0));

} else {

buf.append (";Max-Age=");

buf.append (cookie.getMaxAge());

}

} else if (version == 1)

buf.append (";Discard");

// Path=path

if (cookie.getPath() != null) {

buf.append (";Path=");

maybeQuote (version, buf, cookie.getPath());

}

// Secure

if (cookie.getSecure()) {

buf.append (";Secure");

}

}

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