Java 获取资源路径
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get resource path
提问by Christian
created a new folder "resources" with all my images in eclipse. I added this folder to the class path.
在 Eclipse 中创建了一个包含我所有图像的新文件夹“资源”。我将此文件夹添加到类路径中。
Now i tried to access this images
现在我尝试访问此图像
URL url = new URL("imageA");
I also tried
我也试过
URL url = new URL("resources/imageA");
Both doesnt't work. What is wrong?
两者都不起作用。怎么了？
Sincerely Christian
虔诚的基督徒
回答by Chuk Lee
If you are loading from your classpath you should do something like this
如果你是从你的类路径加载你应该做这样的事情
InputSteam is = this.getClass().getClassLoader().getResourceAsStream("resources/myimage.png")
回答by polygenelubricants
I believe what you want to use are e.g.:
我相信你想使用的是例如：
See also
也可以看看
回答by kgiannakakis
See herefor directions. You can't load an image directly with URL (actually you can, but it is complicated see this question)
请参阅此处了解路线。您不能直接使用 URL 加载图像（实际上可以，但是很复杂，请参阅此问题）
Actually you need to do something like this:
其实你需要做这样的事情：
ClassLoader loader = ClassLoader.getSystemClassLoader();
if(loader != null) {
URL url = loader.getResource(name);
}
回答by Sarath Kumar Sivan
You can use something like this if you are trying to load an image from a local location.
如果您尝试从本地位置加载图像，则可以使用类似的方法。
File file = new File("D:/project/resources/imageA.jpg");
Image image = ImageIO.read(file);
If you are planning to read the image from a URL, use the below code:
如果您打算从 URL 读取图像，请使用以下代码：
URL url = new URL("http://www.google.co.in/images/srpr/logo3w.png");
Image image = ImageIO.read(url);
Please have a look at the below code for better understanding:
请查看以下代码以更好地理解：
package com.stack.overflow.works.main;
import java.awt.Image;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
/**
* @author sarath_sivan
*/
public class ImageLoader {
private ClassLoader classLoader = ClassLoader.getSystemClassLoader();
private Image image = null;
private URL url = null;
/**
* Loading image from a URL with the help of java.net.URL class.
*/
public void loadFromURL() {
image = null;
try {
url = new URL("http://www.google.co.in/images/srpr/logo3w.png");
if (url != null) {
image = ImageIO.read(url);
}
} catch(Exception exception) {
exception.printStackTrace();
}
display(image, "Loading image from URL...");
}
/**
* Loading image from your local hard-drive with getResource().
* Make sure that your resource folder which contains the image
* is available in your class path.
*/
public void loadFromLocalFile() {
image = null;
try {
url = classLoader.getResource("images.jpg");
if (url != null) {
image = ImageIO.read(url);
}
} catch(Exception exception) {
exception.printStackTrace();
}
display(image, "Loading image from Local File...");
}
private void display(Image image, String message) {
JFrame frame = new JFrame(message);
frame.setSize(300, 300);
JLabel label = new JLabel(new ImageIcon(image));
frame.add(label);
frame.setVisible(true);
}
public static void main(String[] args) {
ImageLoader imageLoader = new ImageLoader();
imageLoader.loadFromURL();
imageLoader.loadFromLocalFile();
}
}
Output
输出
