Java generates JPEG image files

Java generates JPEG image files. The code is as follows:





My code is mainly provided for the Workflow Designer object that I write myself (Eworkflowcontrol EWF), Eworkflowcontrol inherits the method that JComponent overloads the drawing, and if a brother needs to use this function, You just need to replace Eworkflowcontrol with your own JComponent object.





/** generates a JPEG image file for graphics on the current input workflow object.





* Each node corresponds to a picture.





* Established files are stored under the Jar file folder and a subfolder is created





* With the name of the node as the name of the folder.





* @param EWF A Workflow object that needs to generate a JPEG picture file.





* @return Boolean: Returns a Boolean value that indicates whether the save was successful.





*/





public static Boolean buildthepictrue (Eworkflowcontrol EWF)





{





//modify by MW





//Lists all node nodes in the process.





//Set these nodes as selected, and coexist into pictures (serial numbers with name nodes)





INode RootNode = Ewf.getnote (); Rectangle bounds = Ewf.getbounds ();





inode[] Children = Rootnode.getnodechildren ();





int childrenlen = Rootnode.getnodechildcount ();





String nodenumber = null;





Boolean flag = true;





//Eliminate all nodes in the selected state.





for (int j = 0; J < Childrenlen; J + +) {





Children[j].setselect (FALSE); }





//Generate general graph (I am a node an image)





try {





java.awt.image.BufferedImage image; Image = New Java.awt.image.BufferedImage (Bounds.width, Bounds.height, Java.awt.image.BufferedImage.TYPE_INT_RGB);





Graphics g = image.getgraphics (); G.setcolor (Color.White);





g.fillrect (0, 0, bounds.width, bounds.height);





Ewf.paintcomponent (g);





String Path = System.getproperty ("User.dir") +system.getproperty ("File.separator") +ewf.getworkflowname () + "[" + Ewf.getworkflowcode () + "]";





file FD = new file (path);





if (!fd.exists ()) {





Fd.mkdirs ();





}





String filePath = path + system.getproperty ("file.separator") + "0.jpeg";





file Imgfile = new file (FilePath);





FileOutputStream fos = new FileOutputStream (imgfile);





bufferedoutputstream bos = new Bufferedoutputstream (FOS);





JPEGImageEncoder encoder = jpegcodec.createjpegencoder (BOS);





Encoder.encode (image); Bos.close ();





}





catch (Exception ex) {





flag = false;





}





//To this first image has been generated!





//looping to generate pictures





for (int i = 0; i < Childrenlen; i++)





{





Nodenumber = Children[i].getnodenumber ();





if (Nodenumber = null)





{





flag = false; Continue





} else {





Children[i].setselect (TRUE);





try {





java.awt.image.BufferedImage image; Image = New Java.awt.image.BufferedImage (Bounds.width, Bounds.height, Java.awt.image.BufferedImage.TYPE_INT_RGB);





Graphics g = image.getgraphics ();





G.setcolor (Color.White);





g.fillrect (0, 0, bounds.width, bounds.height);





Ewf.paintcomponent (g);





String Path = System.getproperty ("User.dir") +system.getproperty ("File.separator") +ewf.getworkflowname () + "[" + Ewf.getworkflowcode () + "]";





file FD = new file (path);





if (!fd.exists ()) {





Fd.mkdirs ();





}





String FilePath = path + system.getproperty ("File.separator") +nodenumber+ ". jpeg";





file Imgfile = new file (FilePath);





FileOutputStream fos = new FileOutputStream (imgfile);





bufferedoutputstream bos = new Bufferedoutputstream (FOS); JPEGImageEncoder encoder = Jpegcodec.createjpegencoder (BOS);





Encoder.encode (image); Bos.close ();





Children[i].setselect (FALSE);





} catch (Exception ex) {





flag = false;





} } }





if (flag) {





New Exceptiondialog (Pic_save_ok,pic_save_dialog_title, Desktopframe.getcurrentinstance (), true). SetVisible ( true);





} else {





New Exceptiondialog (Pic_save_error,pic_save_dialog_title, Desktopframe.getcurrentinstance (), true). setVisible (true);





}





return flag;





}