Java 将JPanel保存到png文件中
我正在尝试实现一个工资条生成器。我已经让GUI在单独的Java 将JPanel保存到png文件中,java,Java,我正在尝试实现一个工资条生成器。我已经让GUI在单独的JPanel上生成工资单。当我单击“另存为PNG”按钮时,它当前正在将Jpanel保存为项目文件夹中的PNG文件。但我希望它能够在保存时指定文件路径和文件名。以下是我迄今为止所做的工作 public static BufferedImage getScreenShot(Component component) { BufferedImage image = new BufferedImage(component.getWidth(),
JPanel
上生成工资单。当我单击“另存为PNG”按钮时,它当前正在将Jpanel保存为项目文件夹中的PNG文件。但我希望它能够在保存时指定文件路径和文件名。以下是我迄今为止所做的工作
public static BufferedImage getScreenShot(Component component) {
BufferedImage image = new BufferedImage(component.getWidth(), component.getHeight(), BufferedImage.TYPE_INT_RGB);
component.paint(image.getGraphics());
return image;
}
public void saveScreenShot(Component component, String fname) throws Exception {
BufferedImage img = getScreenShot(component);
ImageIO.write(img, "png", new File(fname));
}
private void SaveAsPNGButtonActionPerformed(java.awt.event.ActionEvent evt) {
try {
saveScreenShot(PaySlip, "My panel Image.png");
} catch (Exception e) {
}
}
我希望它像下面的代码一样。我用它将搜索结果从Jtable
保存到文本文件中
private void Export2TextActionPerformed(java.awt.event.ActionEvent evt) {
try {
JFileChooser fc = new JFileChooser();
int option = fc.showSaveDialog(SearchEmployeeGUI.this);
if (option == JFileChooser.APPROVE_OPTION) {
try {
String filename = fc.getSelectedFile().getName();
String path = fc.getSelectedFile().getParentFile().getPath();
int len = filename.length();
String ext = "";
String file = "";
if (len > 4) {
ext = filename.substring(len - 4, len);
}
if (ext.equals(".txt")) {
file = path + "\\" + filename;
} else {
file = path + "\\" + filename + ".txt";
}
FileWriter fw = new FileWriter(file);
BufferedWriter bw = new BufferedWriter(fw);
bw.write("Employee ID First Name Last Name Gender Contact No Email Date of Join Designation Basic Salary");
bw.newLine();
bw.write("--------------------------------------------------------------------------------------------------------------------------------------------");
bw.newLine();
for (int i = 0; i < EmployeeTable.getRowCount(); i++) {
for (int j = 0; j < EmployeeTable.getColumnCount(); j++) {
bw.write(EmployeeTable.getModel().getValueAt(i, j) + " ");
}
bw.newLine();
}
bw.close();
fw.close();
int answer = JOptionPane.showConfirmDialog(null, "Would you like to open the exported file?", "Successfully exported!", option);
if (answer == JOptionPane.YES_OPTION) {
try {
Desktop dt = Desktop.getDesktop();
dt.open(new File(file));
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e);
}
}
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e);
}
}
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e);
}
}
private void Export2TextActionPerformed(java.awt.event.ActionEvent evt){
试一试{
JFileChooser fc=新的JFileChooser();
int option=fc.showsavedilog(SearchEmployeeGUI.this);
if(option==JFileChooser.APPROVE\u选项){
试一试{
字符串文件名=fc.getSelectedFile().getName();
字符串路径=fc.getSelectedFile().getParentFile().getPath();
int len=filename.length();
字符串ext=“”;
字符串文件=”;
如果(len>4){
ext=filename.substring(len-4,len);
}
如果(ext.equals(“.txt”)){
文件=路径+“\\”+文件名;
}否则{
文件=路径+“\\”+文件名+“.txt”;
}
FileWriter fw=新的FileWriter(文件);
BufferedWriter bw=新的BufferedWriter(fw);
填写(“员工ID姓名性别联系人无电子邮件加入日期指定基本工资”);
换行符();
写(“------------------------------------------------------------------------------------------------------------------------------------------------------”);
换行符();
for(int i=0;i
在这里,我可以指定路径和文件名。我想为“另存为png”
按钮做同样的事情。但我不知道该怎么做。有人能帮忙吗?提前感谢。您可以使用 String suggesteddir = ".";
String EXTENSION = ".png";
JFileChooser fileChooser = new JFileChooser(suggesteddir);
JFrame choose = new JFrame();
choose.setTitle("Save To ...");
int status = fileChooser.showSaveDialog(choose);
if (status == JFileChooser.APPROVE_OPTION)
{
try
{
File selectedFile = fileChooser.getSelectedFile();
String newfile = selectedFile.getCanonicalPath();
if (!newfile.endsWith(EXTENSION)) {
newfile=newfile + EXTENSION;
}
ImageIO.write(img, "png", new File(newfile)); //write img to file
} catch (IOException ex) {
ex.printStackTrace();
}
}