java swing 把控件映射为BufferedImage
如何把java swing的可视控件 转化为BufferedImage 呢?
直接上代码:
/***
* convert JTextArea to image
* @param ta
* @param destFile
* @param format
*/
public static BufferedImage genericImage(JComponent ta,File destFile,String format){//TODO 如何提高分辨率
BufferedImage img = new BufferedImage(ta.getWidth(), ta.getHeight(), BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = img.createGraphics();
ta.printAll(g2d);
g2d.dispose();
if(!ValueWidget.isNullOrEmpty(destFile)){
try {
ImageIO.write(img, format/*"jpg"*/, destFile);
} catch (IOException ex) {
ex.printStackTrace();
}
}
return img;
}
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如何把BufferedImage 复制到剪切板:
/***
* 复制图片到剪切板
* @param image
*/
public static void setClipboardImage(Container frame, final Image image) {
Transferable trans = new Transferable() {
@Override
public Object getTransferData(DataFlavor flavor)
throws UnsupportedFlavorException, IOException {
if (isDataFlavorSupported(flavor)) {
return image;
}
throw new UnsupportedFlavorException(flavor);
}
@Override
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { DataFlavor.imageFlavor };
}
@Override
public boolean isDataFlavorSupported(DataFlavor flavor) {
return DataFlavor.imageFlavor.equals(flavor);
}
};
frame.getToolkit().getSystemClipboard().setContents(trans, null);
}
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调用:
BufferedImage img =ImageHWUtil.genericImage(ta, null, "jpg"/*picFormat*/);
if(ValueWidget.isNullOrEmpty(img)){
return;
}
ComponentUtil.setClipboardImage(ta.getParent(),img);
ToastMessage toastMessage = new ToastMessage("复制图片到剪切板",3000);
toastMessage.setVisible(true);
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下面是详细工具类:
package com.swing.component;
import java.awt.Color;
import java.awt.Container;
import java.awt.Frame;
import java.awt.Image;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JProgressBar;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.Document;
import javax.swing.text.JTextComponent;
import com.common.dict.Constant2;
import com.common.util.SystemHWUtil;
import com.common.util.TypeUtil;
import com.common.util.WindowUtil;
import com.io.hw.file.util.FileUtils;
import com.string.widget.util.ValueWidget;
import com.swing.menu.MenuUtil2;
import com.swing.messagebox.GUIUtil23;
import com.time.util.TimeHWUtil;
public final class ComponentUtil {
/***
* 为了防止JTextField 重复增加 DocumentListener
*/
public static List<JTextField> tfs = new ArrayList<JTextField>();
/***
* 获取指定页面 复选框被选中的个数
*
* @param checkBoxes
* @param startIndex
* :currentPage * size_per_page
* @param count
* @return
*/
public static int getSelSum(List checkBoxes, int startIndex, int count) {
if (checkBoxes == null || checkBoxes.size() == 0) {
return 0;
} else {
JCheckBox[] chkArr = getCurrentPageChkbox(checkBoxes, startIndex,
count);
if (chkArr == null) {
return 0;
}
int tmp = 0;
for (int i = 0; i < chkArr.length; i++) {
JCheckBox array_element = chkArr[i];
tmp += TypeUtil.bool2int(array_element.isSelected());
}
return tmp;
}
}
/***
*
* @param checkBoxes
* @param startIndex
* :0,5,10,15 ;if =-1,indicate no paging
* @param count
* :size of per page
*/
public static void setSelect(List checkBoxes, int startIndex, int count) {
JCheckBox[] chkArr = getCurrentPageChkbox(checkBoxes, startIndex, count);
if (ValueWidget.isNullOrEmpty(chkArr)) {
return;
}
for (int i = 0; i < chkArr.length; i++) {
JCheckBox chk = chkArr[i];
chk.setSelected(true);
// System.out.println(2);
}
}
/***
*
* @param checkBoxes
* @param startIndex
* :0,5,10,15 ;if =-1,indicate no paging and omit count
* @param count
* :omit when startIndex=-1
* @return
*/
public static JCheckBox[] getCurrentPageChkbox(List checkBoxes,
int startIndex, int count) {
if (checkBoxes == null || checkBoxes.size() == 0) {
return null;
} else {
int endIndex = startIndex + count;
int sum_chk = checkBoxes.size();
if (/*startIndex == -1*/startIndex <0) {
startIndex = 0;
} else {
if (sum_chk < endIndex) {
endIndex = sum_chk;
}
}
JCheckBox[] chkArr = new JCheckBox[endIndex - startIndex];
int index3 = 0;
for (int i = startIndex; i < endIndex&i<sum_chk; i++) {
JCheckBox chk = (JCheckBox) checkBoxes.get(i);
chkArr[index3] = chk;
index3++;
}
return chkArr;
}
}
public static int getCurrentPageChkboxSum(List checkBoxes, int startIndex,
int count) {
if (checkBoxes == null || checkBoxes.size() == 0) {
return 0;
} else {
JCheckBox[] chkArr = getCurrentPageChkbox(checkBoxes, startIndex,
count);
return chkArr.length;
}
}
/***
* 当文本框中输入\ 时，自动扫描该目录下是否只有一个文件，若只有一个文件，设置文本框的值为该文件的绝对路径
*
* @param sourceTF
* @param e
* @throws BadLocationException
*/
public static void assistantTF(final JTextField sourceTF, DocumentEvent e)
throws BadLocationException {
int changeLength = e.getLength();
if (changeLength == 1) {// 表示一次性增加的字符个数是1
final Document doc = e.getDocument();
final String input = doc.getText(e.getDocument().getLength() - 1,
changeLength);
String filepath = null;
File[] files = null;
final String sourceFileStr = sourceTF.getText();
if (input.endsWith(SystemHWUtil.SEPARATOR)) {// 输入的必须是一个字符，必须是 files = FileUtils.getFilesByPathAndSuffix(sourceFileStr, "");
} else {
String fatherFolder = SystemHWUtil.getParentDir(sourceFileStr);
if (!ValueWidget.isNullOrEmpty(fatherFolder)) {
files = FileUtils.getFilesByPathAndPrefix(fatherFolder,
SystemHWUtil.getFileSimpleName(sourceFileStr));
}
}
if (!ValueWidget.isNullOrEmpty(files)) {
if (files.length == 1) {
filepath = files[0].getAbsolutePath();
// System.out.println(filepath);
}
}
if (!ValueWidget.isNullOrEmpty(filepath)) {
// System.out.println("input:" + filepath);
// 临时变量
final String filepath_tmp = filepath;
new Thread(new Runnable() {
@Override
public void run() {
// int length2=sourceFileStr.length();
// try {
// doc.insertString(length2-1, "abc", null);
// } catch (BadLocationException e4) {
// e4.printStackTrace();
// }
sourceTF.setText(filepath_tmp);// 应该放在线程中，不然会报异常：java.lang.IllegalStateException:
// Attempt to mutate in
// notification，参考：http://stackoverflow.com/questions/2788779/java-lang-illegalstateexception-while-using-document-listener-in-textarea-java
sourceTF.setCaretPosition(filepath_tmp.length());
// sourceTF.updateUI();
}
}).start();
}
}
}
public static void assistantTF(final JTextField sourceTF) {
boolean isContains = tfs.contains(sourceTF);
if (isContains) {
throw new RuntimeException(
"This JTextField has added the DocumentListener.");
}
final Document doc = sourceTF.getDocument();
DocumentListener docLis = new DocumentListener() {
@Override
public void removeUpdate(DocumentEvent e) {
}
@Override
public void insertUpdate(DocumentEvent e) {
// System.out.println("insert");
try {
ComponentUtil.assistantTF(sourceTF, e);// Assist path
// complement
} catch (BadLocationException e2) {
e2.printStackTrace();
}
}
@Override
public void changedUpdate(DocumentEvent e) {
// System.out.println("change");
}
};
doc.addDocumentListener(docLis);
tfs.add(sourceTF);
}
/***
* Get a copy button.
*
* @param tp
* @return
*/
public static JButton getCopyBtn(final JTextPane tp) {
JButton copyBtn = new JButton(MenuUtil2.ACTION_STR_COPY);
copyBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(!ValueWidget.isNullOrEmpty(tp)){
String input = tp.getText();
if (!ValueWidget.isNullOrEmpty(input)) {
WindowUtil.setSysClipboardText(input);
}
}}
});
return copyBtn;
}
/***
* Get a copy button.
*
* @param tf
* @return
*//*
public static JButton getCopyBtn(final JTextField tf) {
JButton copyBtn = new JButton(MenuUtil2.ACTION_STR_COPY);
copyBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(!ValueWidget.isNullOrEmpty(tf)){
String input = tf.getText();
if (!ValueWidget.isNullOrEmpty(input)) {
WindowUtil.setSysClipboardText(input);
}
}}
});
return copyBtn;
}*/
/***
* Get a copy button.
*
* @param tf
* @return
*/
public static JButton getCopyBtn(final JTextComponent ta) {
JButton copyBtn = new JButton(MenuUtil2.ACTION_STR_COPY);
copyBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if(!ValueWidget.isNullOrEmpty(ta)){
String input = ta.getText();
if (!ValueWidget.isNullOrEmpty(input)) {
WindowUtil.setSysClipboardText(input);
}
}
}
});
return copyBtn;
}
/***
* Get a paste button.
*
* @param ta
* @return
*/
public static JButton getPasteBtn(final JTextComponent ta) {
JButton copyBtn = new JButton(MenuUtil2.ACTION_STR_PASTE);
copyBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String input = WindowUtil.getSysClipboardText();
if (!ValueWidget.isNullOrEmpty(input)) {
ta.setText(input);
}
}
});
return copyBtn;
}
/***
* Get a paste button.
*
* @param tf
* @return
*/
/*public static JButton getPasteBtn(final JTextField tf) {
JButton copyBtn = new JButton(MenuUtil2.ACTION_STR_PASTE);
copyBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String input = WindowUtil.getSysClipboardText();
if (!ValueWidget.isNullOrEmpty(input)) {
tf.setText(input);
}
}
});
return copyBtn;
}*/
/***
* Get a paste button.
*
* @param tp
* @return
*/
public static JButton getPasteBtn(final JTextPane tp) {
if(ValueWidget.isNullOrEmpty(tp)){
return null;
}
JButton copyBtn = new JButton(MenuUtil2.ACTION_STR_PASTE);
copyBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
String input = WindowUtil.getSysClipboardText();
if (!ValueWidget.isNullOrEmpty(input)) {
tp.setText(input);
}
}
});
return copyBtn;
}
/***
* 默认显示时间
* @param resultTextArea
* @param result
* @param isAddDivide
*/
public static void appendResult(JTextArea resultTextArea, String result,
boolean isAddDivide){
appendResult(resultTextArea, result, isAddDivide, true);
}
/***
*
* @param resultTextArea
* @param result
* @param isAddDivide
* @param prependTime : 是否显示时间
*/
public static void appendResult(JTextArea resultTextArea, String result,
boolean isAddDivide,boolean prependTime)
{
if(ValueWidget.isNullOrEmpty(resultTextArea)){
return;
}
appendResult(resultTextArea, result, isAddDivide, false,prependTime);
}
/***
* 向结果文本框追加内容,不会删除原来的内容。
*
* @param result
* @param CRLFbefore : 表示是否在前面添加一个回车换行
* @param isAddDivide
* @param prependTime : 是否显示时间
*/
public static void appendResult(JTextArea resultTextArea, String result,
boolean isAddDivide,boolean CRLFbefore,boolean prependTime) {
if(ValueWidget.isNullOrEmpty(resultTextArea)){
return;
}
if (result == null) {
result = "";
} else {
result = result + SystemHWUtil.CRLF;
if(prependTime){
String currentTime=TimeHWUtil.getCurrentMiniuteSecondZH();
result = currentTime+"\t| "+result;
}
}
if(CRLFbefore){
result=SystemHWUtil.CRLF+result;
}
Document doc = resultTextArea.getDocument();
int length = doc.getLength();
try {
doc.insertString(length, result, null);
length = length + result.length();
if (isAddDivide) {
doc.insertString(length, SystemHWUtil.DIVIDING_LINE
+ SystemHWUtil.CRLF, null);
}
} catch (BadLocationException e) {
e.printStackTrace();
GUIUtil23.warningDialog(e.getMessage());
}
}
/***
* 向结果文本框追加内容,不会删除原来的内容。
*
* @param result
* @param isAddDivide
*/
public static void appendResult(JTextPane resultTextArea, String result,
boolean isAddDivide) {
if(ValueWidget.isNullOrEmpty(resultTextArea)){
return;
}
appendResult(resultTextArea, result, null, isAddDivide);
}
/***
* 向结果文本框追加内容,不会删除原来的内容。
*
* @param result
* @param isAddDivide
*/
public static void appendResult(JTextPane resultTextPane, String result, AttributeSet set,
boolean isAddDivide) {
if(ValueWidget.isNullOrEmpty(resultTextPane)){
return;
}
if (result == null) {
result = "";
} else {
result = result + SystemHWUtil.CRLF;
}
Document doc = resultTextPane.getDocument();resultTextPane.getText();
int length = doc.getLength();
// if(length>7){
// length=length-17;
// }
try {
doc.insertString(length, result, set);
length = length + result.length();
if (isAddDivide) {
doc.insertString(length, SystemHWUtil.DIVIDING_LINE
+ SystemHWUtil.CRLF, null);
}
} catch (BadLocationException e) {
e.printStackTrace();
GUIUtil23.warningDialog(e.getMessage());
}
}
/***
* 在实际使用过程中，应该放在线程中
*
* @param in
* @param sourceSize
* : 输入流的长度，即要读取的字节个数
* @param targfile
*/
public static void progress(JProgressBar copyProgressBar, InputStream in,
long sourceSize, File targfile) {
FileOutputStream target = null;
try {
int bytesArrLeng = 0;
if (sourceSize < SystemHWUtil.BUFF_SIZE_1024) {//
bytesArrLeng = (int) sourceSize;
} else {
long shangOne = sourceSize / SystemHWUtil.NUMBER_100;
if (shangOne == 0) {// sourceSize<100
shangOne = shangOne + 1;
}
if (shangOne <= SystemHWUtil.BUFF_SIZE_1024) {
bytesArrLeng = (int) shangOne;
} else {
long shangTwo = shangOne / SystemHWUtil.BUFF_SIZE_1024;
if (shangOne % SystemHWUtil.BUFF_SIZE_1024 != 0) {
shangTwo = shangTwo + 1L;
}
bytesArrLeng = (int) (shangOne / shangTwo);
}
}
System.out.println("字节数组的长度是：" + bytesArrLeng);
target = new FileOutputStream(targfile);
byte[] buffer = new byte[bytesArrLeng];
int byteNum;
long hasReadByte = 0L;// 已经读取的字节个数
float result;
int progressSize = 0;
while ((byteNum = in.read(buffer)) != SystemHWUtil.NEGATIVE_ONE) {
target.write(buffer, 0, byteNum);
hasReadByte = hasReadByte + byteNum;
result = (float) ((double) hasReadByte / sourceSize);
progressSize = Math.round(result * SystemHWUtil.NUMBER_100);
updateProgress(copyProgressBar, progressSize);
}
if (progressSize < SystemHWUtil.NUMBER_100) {
progressSize = SystemHWUtil.NUMBER_100;
updateProgress(copyProgressBar, progressSize);
}
copyProgressBar.setForeground(Color.blue);
} catch (Exception e) {
e.printStackTrace();
GUIUtil23.errorDialog(e);
// copyFileBtn.setEnabled(true);
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
GUIUtil23.errorDialog(e);
}
in = null;
}
if (target != null) {
try {
target.close();
} catch (IOException e) {
e.printStackTrace();
GUIUtil23.errorDialog(e);
}
target = null;
}
}
}
/***
* 更新进度条上得进度数字
*
* @param copyProgressBar
* @param progressSize
*/
private static void updateProgress(JProgressBar copyProgressBar,
int progressSize) {
copyProgressBar.setString(progressSize + "%");
copyProgressBar.setValue(progressSize);
}
/***
* 复制图片到剪切板
* @param image
*/
public static void setClipboardImage(Container frame, final Image image) {
Transferable trans = new Transferable() {
@Override
public Object getTransferData(DataFlavor flavor)
throws UnsupportedFlavorException, IOException {
if (isDataFlavorSupported(flavor)) {
return image;
}
throw new UnsupportedFlavorException(flavor);
}
@Override
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[] { DataFlavor.imageFlavor };
}
@Override
public boolean isDataFlavorSupported(DataFlavor flavor) {
return DataFlavor.imageFlavor.equals(flavor);
}
};
frame.getToolkit().getSystemClipboard().setContents(trans, null);
}
public static BufferedImage getClipboardImage(Frame frame) {
// java.lang.ClassCastException: sun.awt.datatransfer.TransferableProxy cannot be cast to sun.awt.datatransfer.ClipboardTransferable
Transferable trans=frame.getToolkit().getSystemClipboard().getContents(null);
BufferedImage image=null;
// if(trans instanceof ClipboardTransferable){
// ClipboardTransferable clipboardTrans =(ClipboardTransferable)trans;
try {
if (null != trans && trans.isDataFlavorSupported(DataFlavor.imageFlavor)) {
Object obj22=trans.getTransferData(DataFlavor.imageFlavor);
if(!ValueWidget.isNullOrEmpty(obj22)){
if(obj22 instanceof BufferedImage){
image=(BufferedImage)obj22;
}
}
}
} catch (UnsupportedFlavorException e1) {
e1.printStackTrace();
GUIUtil23.errorDialog(e1);
} catch (IOException e1) {
e1.printStackTrace();
GUIUtil23.errorDialog(e1);
}
// }
/*try {
Map map=(Map)ReflectHWUtils.getObjectValue(clipboardTrans, "flavorsToData");
Object val=null;
for(Object obj:map.keySet()){
val=map.get(obj);
break;
}
byte[] data=(byte[])ReflectHWUtils.getObjectValue(val, "data");
return data;//(BufferedImage)trans.getTransferData(trans.getTransferDataFlavors()[0]);
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}*/
return image;
}
/***
*
* @param comb
* @param urls
*/
public static void fillComboBox(JComboBox<String> comb,String urls[]){
if(comb==null||ValueWidget.isNullOrEmpty(urls)){
return;
}
for(int i=0;i<urls.length;i++){
comb.addItem(urls[i]);
}
}
/***
*
* @param comb : 下拉框
* @param picUrls : 以;;分割的字符串
*/
public static void fillComboBox(JComboBox<String> comb,String picUrls){
if(!ValueWidget.isNullOrEmpty(picUrls)){//为空判断
String urls[]=picUrls.split(Constant2.SHAREDPICDIVISION);
ComponentUtil.fillComboBox(comb, SystemHWUtil.unique(urls));
}
}
public static JComboBox<String> comboBoxSelectedHandle(JComboBox<String> comboBox,final JTextField ipTextField){
if(ValueWidget.isNullOrEmpty(comboBox)){
comboBox = new JComboBox<String>();
}
comboBox.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
JComboBox<String> target=(JComboBox<String>)e.getSource();
String selectedPort=(String)target.getSelectedItem();
if(!ValueWidget.isNullOrEmpty(selectedPort)){
ipTextField.setText(selectedPort);
}
// System.out.println(e.getSource());
}
});
comboBox.addItemListener(new ItemListener() {
public void itemStateChanged(ItemEvent e) {
JComboBox<String> target=(JComboBox<String>)e.getSource();
String selectedPort=(String)target.getSelectedItem();
if(!ValueWidget.isNullOrEmpty(selectedPort)){
ipTextField.setText(selectedPort);
}
}
});
return comboBox;
}
/***
*
* @param tc
*/
public static void trim(JTextComponent tc){
String text=tc.getText();
if(text!=null && text.length()>0){
tc.setText(text.trim());
}
}
}
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java swing 把控件转化为BufferedImage
原文：http://hw1287789687.iteye.com/blog/2233609