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//defaultSuffix是jpg
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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;
}
使用PowerDesigner软件逆向生成java类图的方法、步骤：1、打开PowerDesiger软件，点击文件-建立新模型，新建Obect-OrientedModel2、点击语言-ReverseEngineerJava，弹出反向生成类图设置窗口；3、在反向生成类图设置窗口中，选择ReverseEngineer，可以选择JavaFiles或JavaDirectories等，在这里我选择JavaDirectories；4、然后点击Add按钮添加目录，在这里我选择一个java源文件目录；5、点击确定，PowerDesigner会显示生成进度窗口，完成以后在PowerDesigner工作空间下会显示类图目录结构；6、到此便将选中的Java目录下的Java类文件生成了静态类结构，
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。