利用swt中的一个获取图片的类SwingResourceManager 来解决将程序打为jar后图片找不着的问题

利用swt中的一个获取图片的类SwingResourceManager 来解决将程序打为jar后图片找不着的问题

该类的具体代码如下：

import java.awt.Image;
import java.awt.Toolkit;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import javax.swing.ImageIcon;

public class SwingResourceManager {

private static HashMap <String, Image> m_ClassImageMap = new HashMap <String, Image>();

private static Image getImage(InputStream is) {
try {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte buf[] = new byte[1024 * 4];
while (true) {
int n = is.read(buf);
if (n == -1)
break;
baos.write(buf, 0, n);
}
baos.close();
return Toolkit.getDefaultToolkit().createImage(baos.toByteArray());
} catch (Throwable e) {
return null;
}
}

public static Image getImage(Class clazz, String path) {
String key = clazz.getName() + ' ¦' + path;
Image image = m_ClassImageMap.get(key);
if (image == null) {
if ((path.length() > 0) && (path.charAt(0) == '/')) {
String newPath = path.substring(1, path.length());
image = getImage(new BufferedInputStream(clazz.getClassLoader().getResourceAsStream(newPath)));
} else {
image = getImage(clazz.getResourceAsStream(path));
}
m_ClassImageMap.put(key, image);
}
return image;
}


public static Image getImage(String path) {
return getImage("default", path); //$NON-NLS-1$
}


public static Image getImage(String section, String path) {
String key = section + ' ¦' + SwingResourceManager.class.getName() + ' ¦' + path;
Image image = m_ClassImageMap.get(key);
if (image == null) {
try {
FileInputStream fis = new FileInputStream(path);
image = getImage(fis);
m_ClassImageMap.put(key, image);
fis.close();
} catch (IOException e) {
return null;
}
}
return image;
}

public static void clearImages(String section) {
for (Iterator I = m_ClassImageMap.keySet().iterator(); I.hasNext();) {
String key = (String) I.next();
if (!key.startsWith(section + ' ¦'))
continue;
Image image = m_ClassImageMap.get(key);
image.flush();
I.remove();
}
}


public static ImageIcon getIcon(Class clazz, String path) {
return getIcon(getImage(clazz, path));
}


public static ImageIcon getIcon(String path) {
return getIcon("default", path); //$NON-NLS-1$
}

public static ImageIcon getIcon(String section, String path) {
return getIcon(getImage(section, path));
}
public static ImageIcon getIcon(Image image) {
if (image == null)
return null;
return new ImageIcon(image);
}
}

将该类放在你的项目中，使用方法 例子如下
lable对象.setIcon(SwingResourceManager.getIcon(label所在类的类名.class,
"图片所在相对与类路径"));
如你的图片icon.jpg在与你程序根目录namespace在同一根目录下的image文件夹中，则路径应写为/image/icon.jpg
如果打包，推荐使用eclipse插件:fatjar