如何在JavaSWT中显示PNG图像?
我需要在SWT Java窗口中显示PNG图像,我正在使用WindowBuilder和Eclipse 首先,我尝试使用标签和以下代码:如何在JavaSWT中显示PNG图像?,java,eclipse,swt,bufferedimage,windowbuilder,Java,Eclipse,Swt,Bufferedimage,Windowbuilder,我需要在SWT Java窗口中显示PNG图像,我正在使用WindowBuilder和Eclipse 首先,我尝试使用标签和以下代码: Label lblNewLabel = new Label(this, SWT.NONE); lblNewLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, true, 1, 1)); Image image = new Image(display, "img
Label lblNewLabel = new Label(this, SWT.NONE);
lblNewLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, true, 1, 1));
Image image = new Image(display, "img/selae_mini.png");
lblNewLabel.setImage(image)
protected Image readImage(String path, Display display) {
InputStream stream = ClassLoader.getSystemClassLoader().getResourceAsStream(path);
BufferedImage bi = null;
try {
bi = ImageIO.read(stream);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (stream != null)
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return new Image(display, convertToSWT(bi));
}
public static ImageData convertToSWT(BufferedImage bufferedImage) {
if (bufferedImage.getColorModel() instanceof DirectColorModel) {
DirectColorModel colorModel = (DirectColorModel) bufferedImage.getColorModel();
PaletteData palette = new PaletteData(
colorModel.getRedMask(),
colorModel.getGreenMask(),
colorModel.getBlueMask()
);
ImageData data = new ImageData(
bufferedImage.getWidth(),
bufferedImage.getHeight(), colorModel.getPixelSize(),
palette
);
WritableRaster raster = bufferedImage.getRaster();
int[] pixelArray = new int[3];
for (int y = 0; y < data.height; y++) {
for (int x = 0; x < data.width; x++) {
raster.getPixel(x, y, pixelArray);
int pixel = palette.getPixel(
new RGB(pixelArray[0], pixelArray[1], pixelArray[2])
);
data.setPixel(x, y, pixel);
}
}
return data;
} else if (bufferedImage.getColorModel() instanceof IndexColorModel) {
IndexColorModel colorModel = (IndexColorModel) bufferedImage.getColorModel();
int size = colorModel.getMapSize();
byte[] reds = new byte[size];
byte[] greens = new byte[size];
byte[] blues = new byte[size];
colorModel.getReds(reds);
colorModel.getGreens(greens);
colorModel.getBlues(blues);
RGB[] rgbs = new RGB[size];
for (int i = 0; i < rgbs.length; i++) {
rgbs[i] = new RGB(reds[i] & 0xFF, greens[i] & 0xFF, blues[i] & 0xFF);
}
PaletteData palette = new PaletteData(rgbs);
ImageData data = new ImageData(
bufferedImage.getWidth(),
bufferedImage.getHeight(),
colorModel.getPixelSize(),
palette
);
data.transparentPixel = colorModel.getTransparentPixel();
WritableRaster raster = bufferedImage.getRaster();
int[] pixelArray = new int[1];
for (int y = 0; y < data.height; y++) {
for (int x = 0; x < data.width; x++) {
raster.getPixel(x, y, pixelArray);
data.setPixel(x, y, pixelArray[0]);
}
}
return data;
}
return null;
}
它在eclipse中执行时起作用,但是当我生成jar时,它就不起作用了。然后我在stackoverflow上发现,您必须使用ClassLoader.getSystemClassLoader().getResourceAsStream
来获取BuffereImage
,然后必须将BuffereImage
转换为ImageData
,最后将其转换为SWTImage
上帝之母。因此,我尝试使用以下代码:
Label lblNewLabel = new Label(this, SWT.NONE);
lblNewLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, true, 1, 1));
Image image = new Image(display, "img/selae_mini.png");
lblNewLabel.setImage(image)
protected Image readImage(String path, Display display) {
InputStream stream = ClassLoader.getSystemClassLoader().getResourceAsStream(path);
BufferedImage bi = null;
try {
bi = ImageIO.read(stream);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (stream != null)
stream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return new Image(display, convertToSWT(bi));
}
public static ImageData convertToSWT(BufferedImage bufferedImage) {
if (bufferedImage.getColorModel() instanceof DirectColorModel) {
DirectColorModel colorModel = (DirectColorModel) bufferedImage.getColorModel();
PaletteData palette = new PaletteData(
colorModel.getRedMask(),
colorModel.getGreenMask(),
colorModel.getBlueMask()
);
ImageData data = new ImageData(
bufferedImage.getWidth(),
bufferedImage.getHeight(), colorModel.getPixelSize(),
palette
);
WritableRaster raster = bufferedImage.getRaster();
int[] pixelArray = new int[3];
for (int y = 0; y < data.height; y++) {
for (int x = 0; x < data.width; x++) {
raster.getPixel(x, y, pixelArray);
int pixel = palette.getPixel(
new RGB(pixelArray[0], pixelArray[1], pixelArray[2])
);
data.setPixel(x, y, pixel);
}
}
return data;
} else if (bufferedImage.getColorModel() instanceof IndexColorModel) {
IndexColorModel colorModel = (IndexColorModel) bufferedImage.getColorModel();
int size = colorModel.getMapSize();
byte[] reds = new byte[size];
byte[] greens = new byte[size];
byte[] blues = new byte[size];
colorModel.getReds(reds);
colorModel.getGreens(greens);
colorModel.getBlues(blues);
RGB[] rgbs = new RGB[size];
for (int i = 0; i < rgbs.length; i++) {
rgbs[i] = new RGB(reds[i] & 0xFF, greens[i] & 0xFF, blues[i] & 0xFF);
}
PaletteData palette = new PaletteData(rgbs);
ImageData data = new ImageData(
bufferedImage.getWidth(),
bufferedImage.getHeight(),
colorModel.getPixelSize(),
palette
);
data.transparentPixel = colorModel.getTransparentPixel();
WritableRaster raster = bufferedImage.getRaster();
int[] pixelArray = new int[1];
for (int y = 0; y < data.height; y++) {
for (int x = 0; x < data.width; x++) {
raster.getPixel(x, y, pixelArray);
data.setPixel(x, y, pixelArray[0]);
}
}
return data;
}
return null;
}
受保护的图像读取图像(字符串路径、显示){
InputStream stream=ClassLoader.getSystemClassLoader().getResourceAsStream(路径);
BuffereImage bi=null;
试一试{
bi=图像IO.read(流);
}捕获(IOE异常){
e、 printStackTrace();
}最后{
试一试{
if(流!=null)
stream.close();
}捕获(IOE异常){
e、 printStackTrace();
}
}
返回新图像(显示、转换到WT(bi));
}
公共静态图像数据转换器TOSWT(BuffereImage BuffereImage){
if(BuffereImage.getColorModel()DirectColorModel的实例){
DirectColorModel colorModel=(DirectColorModel)BuffereImage.getColorModel();
PaletteData调色板=新PaletteData(
colorModel.getRedMask(),
colorModel.getGreenMask(),
colorModel.getBlueMask()
);
ImageData数据=新的ImageData(
BuffereImage.getWidth(),
BuffereImage.getHeight(),colorModel.getPixelSize(),
调色板
);
WritableRaster raster=BuffereImage.getRaster();
int[]像素数组=新int[3];
对于(int y=0;y
现在的问题是,我的图像是一个png文件,当执行convertToSWT方法的IF时,得到的结果是图像有一个名为#pixelBits的颜色模型,因此该方法返回null!我找不到任何关于如何解决这个问题的信息
我真的被这件简单的事难住了。任何帮助都将不胜感激。我以前遇到过这个问题,我已经解决了。假设您的图像位于项目的资源文件夹中:
String yourImg = "sampleImg.png";
...
Label swtImg = new Label(composite, SWT.NONE);
swtImg.setImage(new Image(display, YourClassName.calss.getResourceAsStream(yourImg)));
这对我有用!
祝你好运;) 我以前遇到过这个问题,我解决了。假设您的图像位于项目的资源文件夹中:
String yourImg = "sampleImg.png";
...
Label swtImg = new Label(composite, SWT.NONE);
swtImg.setImage(new Image(display, YourClassName.calss.getResourceAsStream(yourImg)));
这对我有用!
祝你好运;) 我尝试过你的方式:lblNewLabel.setImage(新图像(display,ClassLoader.getSystemClassLoader().getResourceAsStream(“Image.png”));我把图像放在最近创建的“res”文件夹中。但它在该行出现“IllegalArgumentException:Argument cannot be null”异常时崩溃……我在项目属性中的“java构建路径”的源选项卡中将res文件夹添加到java构建路径中,现在它工作了。。。感谢您尝试过:lblNewLabel.setImage(新图像(display,ClassLoader.getSystemClassLoader().getResourceAsStream(“Image.png”));我把图像放在最近创建的“res”文件夹中。但它在该行出现“IllegalArgumentException:Argument cannot be null”异常时崩溃……我在项目属性中的“java构建路径”的源选项卡中将res文件夹添加到java构建路径中,现在它工作了。。。谢谢