java 如何使用 JFileChooser 在 JFrame 中上传和显示图像
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how to upload and display image in JFrame using JFileChooser
提问by Prabhu Krishnan
I need to upload and display an image selected with the JFileChooser(i.e the user wants to set his/her profile picture) in a JFrame.. How should I do it?
我需要上传并显示选择的图像JFileChooser（即用户想要设置他/她的个人资料图片）在JFrame.. 我应该怎么做？
Here is my code for choosing the file:
这是我选择文件的代码：
private void UploadImageActionPerformed(java.awt.event.ActionEvent evt) {
int returnVal = fileChosser.showOpenDialog(this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
File file = fileChosser.getSelectedFile();
// What to do with the file
// I want code for this part
try {
//code that might create an exception
}
catch (Exception e1) {
e.printStackTrace();
}
}
}
回答by Prabhu Krishnan
I solved it myself. I chose an image and displayed in a JLabel.
我自己解决了。我选择了一个图像并显示在JLabel.
Here is My code:
这是我的代码：
private void uploadImageActionPerformed(java.awt.event.ActionEvent evt) {
JFileChooser filechooser = new JFileChooser();
filechooser.setDialogTitle("Choose Your File");
filechooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
// below code selects the file
int returnval = filechooser.showOpenDialog(this);
if (returnval == JFileChooser.APPROVE_OPTION)
{
File file = filechooser.getSelectedFile();
BufferedImage bi;
try {
// display the image in a Jlabel
bi = ImageIO.read(file);
jLabel1.setIcon(new ImageIcon(bi));
} catch(IOException e) {
e.printStackTrace(); // todo: implement proper error handeling
}
this.pack();
}
}
