Question

I’m trying to convert files from png’s to pdf using imagemagick and Java. I’ve got everything working to a place when I’m executing imagemagick command to actually merge multiple png’s into one pdf. The command itself looks properly, and it works fine when executed in the terminal but my application gives me error showing that imgck can’t open the file (even though it exists and I’ve set permissions to the folder to 777 :

line: convert: unable to open image `"/Users/mk/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/sch-java/print-1357784001005.png"': No such file or directory @ error/blob.c/OpenBlob/2642.

This is my command :

/opt/local/bin/convert "/Users/mk/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/sch-java/print-1357784001005.png" "/Users/mk/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/sch-java/print-1357784001219.png" "/Users/mk/Documents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/sch-java/complete-exportedPanel2013-01-1003:13:17.212.pdf"

And my Java code :

String filesString = "";

for (String s : pdfs){
    filesString += "\""+ s + "\" ";
}

Process imgkProcess = null;

BufferedReader br = null;
File f1 = new File(pdfs[0]);

//returns true
System.out.println("OE: "+f1.exists());

String cmd = imgkPath+"convert "+ filesString+ " \""+outputPath+outName+"\"";
try {
    imgkProcess = Runtime.getRuntime().exec(cmd);
    InputStream stderr = imgkProcess.getErrorStream();
    InputStreamReader isr = new InputStreamReader(stderr);
    br = new BufferedReader(isr);
} catch (IOException e1) {
    msg = e1.getMessage(); 
}

imgkProcess.waitFor();

while( (line=br.readLine() ) != null){
    System.out.println("line: "+line);
}

The whole code is executed from a java servlet controller after getting request from a form. Any ideas what can cause this ? I’m using latest imgck, jdk, and osx 10.7 .

Answer 1

Solved it by adding all arguments to an arrayList and then casting it to String array.

ArrayList<String> cmd = new ArrayList<String>();
cmd.add(imgkPath+"convert");

for (int i=0, l=pdfs.length; i<l; i++){
    cmd.add(pdfs[i]);
}
cmd.add(outputPath+outName);

imgkProcess = Runtime.getRuntime().exec(cmd.toArray(new String[cmd.size()]));