import javax.swing.ImageIcon;
站在用户的角度思考问题，与客户深入沟通，找到大余网站设计与大余网站推广的解决方案，凭借多年的经验，让设计与互联网技术结合，创造个性化、用户体验好的作品，建站类型包括：网站设计制作、成都网站制作、企业官网、英文网站、手机端网站、网站推广、域名注册、雅安服务器托管、企业邮箱。业务覆盖大余地区。
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Test extends JFrame{
private ImageIcon i;
private JLabel l;
private JPanel p;
public Test(){
i = new ImageIcon("D:\\1.jpg");
l = new JLabel(i);
p = new JPanel();
p.add(l);
this.add(p);
this.setBounds(300, 200, 200, 300);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args){
new Test();
}
}
这样写吧，简单明了。路径是可变的，我这个例子是D盘下有个 1.jpg 的图片
你要改路径的时候 记得是\\ 写\ 没用的。
愿你的JAVA 之路更有趣，有问题随时欢迎讨论！
1.调用"images"文件夹里的文件放在ImageIcon里显示2.在windows下面显示正常Java在图形处理时调用了本地的图形处理库。在利用Java作图形处理（比如：图片缩放，图片签名，生成报表）时，如果运行在windows上不会出问题。如果将程序移植到Linux/Unix上的时候有可能出现图形不能显示的错误。3.提示信息："Can'tconnecttoX11windowserver"这是由于Linux的图形处理需要一个XServer服务器。（关于Linux的图形处理模式参考Tomcat的修改如下：打开%Tomcat_home%/bin/catalina.sh文件在文件的86%处，启动Tomcat的脚本中加上:-Djava.awt.headless=true/参考："$_RUNJAVA"$JAVA_OPTS$CATALINA_OPTS/-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS"-classpath"$CLASSPATH"/-Dcatalina.base="$CATALINA_BASE"/-Dcatalina.home="$CATALINA_HOME"/-Djava.io.tmpdir="$CATALINA_TMPDIR"/-Djava.awt.headless=true/org.apache.catalina.startup.Bootstrap"$@"start/"$CATALINA_BASE"/logs/catalina.out21if[!-z"$CATALINA_PID"];thenecho$!$CATALINA_PIDfifielif["$1"="stop"];then保存后，重新启动就可以处理图形了。
//defaultSuffix是jpg
public static final boolean resizeImage(String fileName, String suffix) throws Exception {
boolean uploaded = false;
BufferedImage input;
if(suffix.equalsIgnoreCase("tif")||suffix.equalsIgnoreCase("tiff")||suffix.equalsIgnoreCase("png")) {
RenderedImage image = JAI.create("fileload", TurbineServlet.getRealPath(imageRoot + fileName+"."+suffix));
WritableRaster raster = image.copyData(null);
BufferedImage bi = new BufferedImage( image.getColorModel(), raster, true, null);
BufferedImage bi2 = new BufferedImage( maxResizeDimension, bi.getHeight()*maxResizeDimension/bi.getWidth(), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi2.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.setBackground(java.awt.Color.WHITE);//把tiff和png转换后的背景设置为白色
g2.fillRect(0, 0, maxResizeDimension, bi.getHeight()*maxResizeDimension/bi.getWidth());
g2.drawImage(bi, 0, 0, maxResizeDimension, bi.getHeight()*maxResizeDimension/bi.getWidth(), null);
PlanarImage pi = PlanarImage.wrapRenderedImage(bi2);
JAI.create("FileStore", pi, TurbineServlet.getRealPath(resizeRoot + fileName+"."+defaultSuffix).replaceAll("\\\\","\\\\\\\\"), "JPEG", new JPEGEncodeParam());
input = pi.getAsBufferedImage();
int w = maxThumbDimension, h = maxThumbDimension;
BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_3BYTE_BGR);
Graphics2D g = output.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(input,0,0,w,h, null);
ImageIO.write(output, defaultSuffix, new File(TurbineServlet.getRealPath(thumbRoot + fileName+"."+defaultSuffix)));
}
else {
input = ImageIO.read(new File(TurbineServlet.getRealPath(imageRoot + fileName+"."+suffix)));
int w = maxThumbDimension, h = maxThumbDimension;
BufferedImage output = new BufferedImage(w, h, BufferedImage.TYPE_3BYTE_BGR);
Graphics2D g = output.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g.drawImage(input,0,0,w,h, null);
ImageIO.write(output, defaultSuffix, new File(TurbineServlet.getRealPath(thumbRoot + fileName+"."+defaultSuffix)));
BufferedImage output2 = new BufferedImage(maxResizeDimension, input.getHeight()*maxResizeDimension/input.getWidth(), BufferedImage.TYPE_3BYTE_BGR);
Graphics2D g2 = output2.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2.drawImage(input,0,0,maxResizeDimension, input.getHeight()*maxResizeDimension/input.getWidth(), null);
ImageIO.write(output2, defaultSuffix, new File(TurbineServlet.getRealPath(resizeRoot + fileName+"."+defaultSuffix)));
}
uploaded = true;
return uploaded;
}
正好写了一个，给你看看哈
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.util.Date;
import javax.imageio.ImageIO;
public class ScreenCapturer {
public static void main(String[] args) throws Exception{
Date date = new Date();
Robot rbt = new Robot();
BufferedImage bf = rbt.createScreenCapture(new Rectangle(1440,900)); //这是屏幕分辨率 可以根据自己的屏幕修改
File file = new File("d://"+ date.toString().replace(" ","").replace(":","")+".jpg"); //这是保存路径D盘根目录
ImageIO.write(bf,"jpg",file);
System.out.println("截图成功！保存于D盘根目录下！时间：" + date.toString());
}
}
仅仅是给窗口添加背景的话是很简单的，添加上以下语句（自己去添加变量哈）：
label = new JLabel(background); //background为ImageIcon
// 把标签的大小位置设置为图片刚好填充整个面板
label.setBounds(0, 0, this.getWidth(), this.getHeight());
//添加图片到frame的第二层(把背景图片添加到分层窗格的最底层作为背景)
this.getLayeredPane().add(label,new Integer(Integer.MIN_VALUE));
//把内容窗格转化为JPanel，否则不能用方法setOpaque()来使内容窗格透明
jPanel=(JPanel)this.getContentPane();
//设置透明
jPanel.setOpaque(false);
然后你上面那个JPanel p也设置成透明就可以了
