下面列出了java.awt.datatransfer.DataFlavor#getParameter ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
/**
* Tests only whether the flavor's MIME type supports the charset
* parameter. Must only be called for flavors with a primary type of
* "text".
*/
public static boolean doesSubtypeSupportCharset(DataFlavor flavor) {
if (dtLog.isLoggable(PlatformLogger.Level.FINE)) {
if (!"text".equals(flavor.getPrimaryType())) {
dtLog.fine("Assertion (\"text\".equals(flavor.getPrimaryType())) failed");
}
}
String subType = flavor.getSubType();
if (subType == null) {
return false;
}
Object support = textMIMESubtypeCharsetSupport.get(subType);
if (support != null) {
return (support == Boolean.TRUE);
}
boolean ret_val = (flavor.getParameter("charset") != null);
textMIMESubtypeCharsetSupport.put
(subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE);
return ret_val;
}
protected String getCharsetForTextFormat(Long lFormat) {
long format = lFormat.longValue();
if (isMimeFormat(format, "text")) {
String nat = getNativeForFormat(format);
DataFlavor df = new DataFlavor(nat, null);
// Ignore the charset parameter of the MIME type if the subtype
// doesn't support charset.
if (!DataTransferer.doesSubtypeSupportCharset(df)) {
return null;
}
String charset = df.getParameter("charset");
if (charset != null) {
return charset;
}
}
return super.getCharsetForTextFormat(lFormat);
}
private static void runTest() throws Exception {
String testString = "my string";
JTextField tf = new JTextField(testString);
tf.selectAll();
Clipboard clipboard = new Clipboard("clip");
tf.getTransferHandler().exportToClipboard(tf, clipboard, TransferHandler.COPY);
DataFlavor[] dfs = clipboard.getAvailableDataFlavors();
for (DataFlavor df: dfs) {
String charset = df.getParameter("charset");
if (InputStream.class.isAssignableFrom(df.getRepresentationClass()) &&
charset != null) {
BufferedReader br = new BufferedReader(new InputStreamReader(
(InputStream) clipboard.getData(df), charset));
String s = br.readLine();
System.out.println("Content: '" + s + "'");
passed &= s.contains(testString);
}
}
}
/**
* Tests only whether the flavor's MIME type supports the charset
* parameter. Must only be called for flavors with a primary type of
* "text".
*/
public static boolean doesSubtypeSupportCharset(DataFlavor flavor) {
if (dtLog.isLoggable(PlatformLogger.Level.FINE)) {
if (!"text".equals(flavor.getPrimaryType())) {
dtLog.fine("Assertion (\"text\".equals(flavor.getPrimaryType())) failed");
}
}
String subType = flavor.getSubType();
if (subType == null) {
return false;
}
Object support = textMIMESubtypeCharsetSupport.get(subType);
if (support != null) {
return (support == Boolean.TRUE);
}
boolean ret_val = (flavor.getParameter("charset") != null);
textMIMESubtypeCharsetSupport.put
(subType, (ret_val) ? Boolean.TRUE : Boolean.FALSE);
return ret_val;
}
protected String getCharsetForTextFormat(Long lFormat) {
long format = lFormat.longValue();
if (isMimeFormat(format, "text")) {
String nat = getNativeForFormat(format);
DataFlavor df = new DataFlavor(nat, null);
// Ignore the charset parameter of the MIME type if the subtype
// doesn't support charset.
if (!DataTransferer.doesSubtypeSupportCharset(df)) {
return null;
}
String charset = df.getParameter("charset");
if (charset != null) {
return charset;
}
}
return super.getCharsetForTextFormat(lFormat);
}
protected String getCharsetForTextFormat(Long lFormat) {
long format = lFormat.longValue();
if (isMimeFormat(format, "text")) {
String nat = getNativeForFormat(format);
DataFlavor df = new DataFlavor(nat, null);
// Ignore the charset parameter of the MIME type if the subtype
// doesn't support charset.
if (!DataTransferer.doesSubtypeSupportCharset(df)) {
return null;
}
String charset = df.getParameter("charset");
if (charset != null) {
return charset;
}
}
return super.getCharsetForTextFormat(lFormat);
}
private static void runTest() throws Exception {
String testString = "my string";
JTextField tf = new JTextField(testString);
tf.selectAll();
Clipboard clipboard = new Clipboard("clip");
tf.getTransferHandler().exportToClipboard(tf, clipboard, TransferHandler.COPY);
DataFlavor[] dfs = clipboard.getAvailableDataFlavors();
for (DataFlavor df: dfs) {
String charset = df.getParameter("charset");
if (InputStream.class.isAssignableFrom(df.getRepresentationClass()) &&
charset != null) {
BufferedReader br = new BufferedReader(new InputStreamReader(
(InputStream) clipboard.getData(df), charset));
String s = br.readLine();
System.out.println("Content: '" + s + "'");
passed &= s.contains(testString);
}
}
}
protected String getCharsetForTextFormat(Long lFormat) {
long format = lFormat.longValue();
if (isMimeFormat(format, "text")) {
String nat = getNativeForFormat(format);
DataFlavor df = new DataFlavor(nat, null);
// Ignore the charset parameter of the MIME type if the subtype
// doesn't support charset.
if (!DataTransferer.doesSubtypeSupportCharset(df)) {
return null;
}
String charset = df.getParameter("charset");
if (charset != null) {
return charset;
}
}
return super.getCharsetForTextFormat(lFormat);
}
private static void runTest() throws Exception {
String testString = "my string";
JTextField tf = new JTextField(testString);
tf.selectAll();
Clipboard clipboard = new Clipboard("clip");
tf.getTransferHandler().exportToClipboard(tf, clipboard, TransferHandler.COPY);
DataFlavor[] dfs = clipboard.getAvailableDataFlavors();
for (DataFlavor df: dfs) {
String charset = df.getParameter("charset");
if (InputStream.class.isAssignableFrom(df.getRepresentationClass()) &&
charset != null) {
BufferedReader br = new BufferedReader(new InputStreamReader(
(InputStream) clipboard.getData(df), charset));
String s = br.readLine();
System.out.println("Content: '" + s + "'");
passed &= s.contains(testString);
}
}
}
protected String getCharsetForTextFormat(Long lFormat) {
long format = lFormat.longValue();
if (isMimeFormat(format, "text")) {
String nat = getNativeForFormat(format);
DataFlavor df = new DataFlavor(nat, null);
// Ignore the charset parameter of the MIME type if the subtype
// doesn't support charset.
if (!DataTransferer.doesSubtypeSupportCharset(df)) {
return null;
}
String charset = df.getParameter("charset");
if (charset != null) {
return charset;
}
}
return super.getCharsetForTextFormat(lFormat);
}
/**
* If the specified flavor is a text flavor which supports the "charset"
* parameter, then this method returns that parameter, or the default
* charset if no such parameter was specified at construction. For non-
* text DataFlavors, and for non-charset text flavors, this method returns
* null.
*/
public static String getTextCharset(DataFlavor flavor) {
if (!isFlavorCharsetTextType(flavor)) {
return null;
}
String encoding = flavor.getParameter("charset");
return (encoding != null) ? encoding : getDefaultTextCharset();
}
public static EHTMLReadMode getEHTMLReadMode (DataFlavor df) {
EHTMLReadMode mode = HTML_READ_SELECTION;
String parameter = df.getParameter("document");
if ("all".equals(parameter)) {
mode = HTML_READ_ALL;
} else if ("fragment".equals(parameter)) {
mode = HTML_READ_FRAGMENT;
}
return mode;
}
/**
* Returns whether this flavor is a text type which supports the
* 'charset' parameter.
*/
public static boolean isFlavorCharsetTextType(DataFlavor flavor) {
// Although stringFlavor doesn't actually support the charset
// parameter (because its primary MIME type is not "text"), it should
// be treated as though it does. stringFlavor is semantically
// equivalent to "text/plain" data.
if (DataFlavor.stringFlavor.equals(flavor)) {
return true;
}
if (!"text".equals(flavor.getPrimaryType()) ||
!doesSubtypeSupportCharset(flavor))
{
return false;
}
Class rep_class = flavor.getRepresentationClass();
if (flavor.isRepresentationClassReader() ||
String.class.equals(rep_class) ||
flavor.isRepresentationClassCharBuffer() ||
DataTransferer.charArrayClass.equals(rep_class))
{
return true;
}
if (!(flavor.isRepresentationClassInputStream() ||
flavor.isRepresentationClassByteBuffer() ||
DataTransferer.byteArrayClass.equals(rep_class))) {
return false;
}
String charset = flavor.getParameter("charset");
return (charset != null)
? DataTransferer.isEncodingSupported(charset)
: true; // null equals default encoding which is always supported
}
/**
* If the specified flavor is a text flavor which supports the "charset"
* parameter, then this method returns that parameter, or the default
* charset if no such parameter was specified at construction. For non-
* text DataFlavors, and for non-charset text flavors, this method returns
* null.
*/
public static String getTextCharset(DataFlavor flavor) {
if (!isFlavorCharsetTextType(flavor)) {
return null;
}
String encoding = flavor.getParameter("charset");
return (encoding != null) ? encoding : getDefaultTextCharset();
}
/**
* If the specified flavor is a text flavor which supports the "charset"
* parameter, then this method returns that parameter, or the default
* charset if no such parameter was specified at construction. For non-
* text DataFlavors, and for non-charset text flavors, this method returns
* null.
*/
public static String getTextCharset(DataFlavor flavor) {
if (!isFlavorCharsetTextType(flavor)) {
return null;
}
String encoding = flavor.getParameter("charset");
return (encoding != null) ? encoding : getDefaultTextCharset();
}
public static EHTMLReadMode getEHTMLReadMode (DataFlavor df) {
EHTMLReadMode mode = HTML_READ_SELECTION;
String parameter = df.getParameter("document");
if ("all".equals(parameter)) {
mode = HTML_READ_ALL;
} else if ("fragment".equals(parameter)) {
mode = HTML_READ_FRAGMENT;
}
return mode;
}
public static EHTMLReadMode getEHTMLReadMode (DataFlavor df) {
EHTMLReadMode mode = HTML_READ_SELECTION;
String parameter = df.getParameter("document");
if ("all".equals(parameter)) {
mode = HTML_READ_ALL;
} else if ("fragment".equals(parameter)) {
mode = HTML_READ_FRAGMENT;
}
return mode;
}
public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {
LinkedHashSet<String> natives = new LinkedHashSet<>(1);
if (df == null) {
return natives;
}
String charset = df.getParameter("charset");
String baseType = df.getPrimaryType() + "/" + df.getSubType();
String mimeType = baseType;
if (charset != null && DataTransferer.isFlavorCharsetTextType(df)) {
mimeType += ";charset=" + charset;
}
// Add a mapping to the MIME native whenever the representation class
// doesn't require translation.
if (df.getRepresentationClass() != null &&
(df.isRepresentationClassInputStream() ||
df.isRepresentationClassByteBuffer() ||
byte[].class.equals(df.getRepresentationClass()))) {
natives.add(mimeType);
}
if (DataFlavor.imageFlavor.equals(df)) {
String[] mimeTypes = ImageIO.getWriterMIMETypes();
if (mimeTypes != null) {
for (int i = 0; i < mimeTypes.length; i++) {
Iterator writers =
ImageIO.getImageWritersByMIMEType(mimeTypes[i]);
while (writers.hasNext()) {
ImageWriter imageWriter = (ImageWriter)writers.next();
ImageWriterSpi writerSpi =
imageWriter.getOriginatingProvider();
if (writerSpi != null &&
writerSpi.canEncodeImage(getDefaultImageTypeSpecifier())) {
natives.add(mimeTypes[i]);
break;
}
}
}
}
} else if (DataTransferer.isFlavorCharsetTextType(df)) {
// stringFlavor is semantically equivalent to the standard
// "text/plain" MIME type.
if (DataFlavor.stringFlavor.equals(df)) {
baseType = "text/plain";
}
for (String encoding : DataTransferer.standardEncodings()) {
if (!encoding.equals(charset)) {
natives.add(baseType + ";charset=" + encoding);
}
}
// Add a MIME format without specified charset.
if (!natives.contains(baseType)) {
natives.add(baseType);
}
}
return natives;
}
public List getPlatformMappingsForFlavor(DataFlavor df) {
List natives = new ArrayList(1);
if (df == null) {
return natives;
}
String charset = df.getParameter("charset");
String baseType = df.getPrimaryType() + "/" + df.getSubType();
String mimeType = baseType;
if (charset != null && DataTransferer.isFlavorCharsetTextType(df)) {
mimeType += ";charset=" + charset;
}
// Add a mapping to the MIME native whenever the representation class
// doesn't require translation.
if (df.getRepresentationClass() != null &&
(df.isRepresentationClassInputStream() ||
df.isRepresentationClassByteBuffer() ||
byteArrayClass.equals(df.getRepresentationClass()))) {
natives.add(mimeType);
}
if (DataFlavor.imageFlavor.equals(df)) {
String[] mimeTypes = ImageIO.getWriterMIMETypes();
if (mimeTypes != null) {
for (int i = 0; i < mimeTypes.length; i++) {
Iterator writers =
ImageIO.getImageWritersByMIMEType(mimeTypes[i]);
while (writers.hasNext()) {
ImageWriter imageWriter = (ImageWriter)writers.next();
ImageWriterSpi writerSpi =
imageWriter.getOriginatingProvider();
if (writerSpi != null &&
writerSpi.canEncodeImage(getDefaultImageTypeSpecifier())) {
natives.add(mimeTypes[i]);
break;
}
}
}
}
} else if (DataTransferer.isFlavorCharsetTextType(df)) {
// stringFlavor is semantically equivalent to the standard
// "text/plain" MIME type.
if (DataFlavor.stringFlavor.equals(df)) {
baseType = "text/plain";
}
for (String encoding : DataTransferer.standardEncodings()) {
if (!encoding.equals(charset)) {
natives.add(baseType + ";charset=" + encoding);
}
}
// Add a MIME format without specified charset.
if (!natives.contains(baseType)) {
natives.add(baseType);
}
}
return natives;
}
@Override
public LinkedHashSet<String> getPlatformMappingsForFlavor(DataFlavor df) {
LinkedHashSet<String> natives = new LinkedHashSet<>(1);
if (df == null) {
return natives;
}
String charset = df.getParameter("charset");
String baseType = df.getPrimaryType() + "/" + df.getSubType();
String mimeType = baseType;
if (charset != null && DataFlavorUtil.isFlavorCharsetTextType(df)) {
mimeType += ";charset=" + charset;
}
// Add a mapping to the MIME native whenever the representation class
// doesn't require translation.
if (df.getRepresentationClass() != null &&
(df.isRepresentationClassInputStream() ||
df.isRepresentationClassByteBuffer() ||
byte[].class.equals(df.getRepresentationClass()))) {
natives.add(mimeType);
}
if (DataFlavor.imageFlavor.equals(df)) {
String[] mimeTypes = ImageIO.getWriterMIMETypes();
if (mimeTypes != null) {
for (String mime : mimeTypes) {
Iterator<ImageWriter> writers = ImageIO.getImageWritersByMIMEType(mime);
while (writers.hasNext()) {
ImageWriter imageWriter = writers.next();
ImageWriterSpi writerSpi = imageWriter.getOriginatingProvider();
if (writerSpi != null &&
writerSpi.canEncodeImage(getDefaultImageTypeSpecifier())) {
natives.add(mime);
break;
}
}
}
}
} else if (DataFlavorUtil.isFlavorCharsetTextType(df)) {
// stringFlavor is semantically equivalent to the standard
// "text/plain" MIME type.
if (DataFlavor.stringFlavor.equals(df)) {
baseType = "text/plain";
}
for (String encoding : DataFlavorUtil.standardEncodings()) {
if (!encoding.equals(charset)) {
natives.add(baseType + ";charset=" + encoding);
}
}
// Add a MIME format without specified charset.
if (!natives.contains(baseType)) {
natives.add(baseType);
}
}
return natives;
}