如果用户未能选择RadioButton，则使用JAR从访问PDF文件

Question

如果用户未能选择单选按钮，我想从我的JAR中复制一个PDF文件。我遇到的问题是控制台报告java.io.FileNotFoundException：file:/home/geekey/workspace/TabSync/bin/ndg/co/uk/TabSync/nullpdf.pdf(没有这样的文件或目录(，即使文件在那里。如果我复制声称为"没有这样的文件"的路径。。。进入Thunar，然后文件会立即打开，因此路径是正确的。

代码如下：

    URL nopathbrain = getClass().getResource("/ndg/co/uk/TabSync/nullpdf.pdf");
////////////////////////////////////////////////////////////////////////////////////////
        public void actionPerformed(ActionEvent arg0) {
            try{
            //set the busy cursor while building the sync files
             setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
            if (radioButton1.isSelected()) {
                filepathbrain1 = txtPath1.getText();
                System.out.println(filepathbrain1);
            } else {
                System.out.println(nopathbrain);
                filepathbrain1 = String.valueOf(nopathbrain); 
            }
copysource();

copysource((看起来像这个

public void copysource() {
    try{
        File afile =new File(filepathbrain1);
        File bfile =new File(buildpath +"/documents/1.pdf");
        FileInputStream inStream = new FileInputStream(afile);
        FileOutputStream outStream = new FileOutputStream(bfile);
        byte[] buffer = new byte[1024];
        int length;
        //copy the file content in bytes 
        while ((length = inStream.read(buffer)) > 0){
            outStream.write(buffer, 0, length);
        } //end while
        inStream.close();
        outStream.close();

jar-tvf的输出为：

 0 Sun Mar 31 09:51:56 BST 2013 ngd/
     0 Sun Mar 31 09:51:56 BST 2013 ngd/co/
     0 Sun Mar 31 09:51:56 BST 2013 ngd/co/uk/
     0 Sun Mar 31 09:51:56 BST 2013 ngd/co/uk/TabSync/
   806 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/About$1.class
   556 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/About$2.class
  4762 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/About.class
  1802 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/Help.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$1.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$10.class
  1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$11.class
  1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$12.class
  1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$13.class
  1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$14.class
  1117 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$15.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$16.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$17.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$18.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$19.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$2.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$20.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$21.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$22.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$23.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$24.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$25.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$26.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$27.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$28.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$29.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$3.class
   735 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$30.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$31.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$32.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$33.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$34.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$35.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$36.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$37.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$38.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$39.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$4.class
  1120 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$40.class
  4765 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$41.class
   723 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$42.class
  1185 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$43.class
   697 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$44.class
  1220 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$45.class
   995 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$46.class
   781 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$47.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$5.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$6.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$7.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$8.class
   733 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$9.class
  2097 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main$Field1Listener.class
 47217 Sun Mar 31 09:52:54 BST 2013 ngd/co/uk/TabSync/Main.class
  1260 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/FileFiltererpdf.class
  1260 Sun Mar 31 08:53:20 BST 2013 ngd/co/uk/TabSync/FileFiltererjpg.class
991552 Wed Jul 27 19:13:00 BST 2011 ngd/co/uk/TabSync/Coalition_v2.ttf
991552 Wed Jul 27 19:13:00 BST 2011 Coalition_v2.ttf
409717 Thu Mar 21 14:15:32 GMT 2013 nullpdf.pdf

我遇到的问题是，如果没有选择单选按钮，那么JAR中的PDF副本就无法工作。如果我在桌面上提供了一个文件的手动路径，那么副本就可以正常工作(所以我很高兴copysource((工作正常，只是为了完整起见才包含在内(。

编辑于此：

我现在正试图通过一个临时文件访问pdf，因为我似乎应该使用Stream来获取资源，但我仍然得到了未找到的文件异常。代码：

//write the null file to tmp for copy
         try {
                java.io.InputStream iss = getClass().getResourceAsStream("/nullpdf.pdf");
                byte[] data = new byte[iss.available()];
                iss.read(data);
                iss.close();
                String tempFile = "file";
                File temp = File.createTempFile(tempFile, ".pdf");
                FileOutputStream fos = new FileOutputStream(temp);
                fos.write(data);
                fos.flush();
                fos.close();
            nopathbrain = tempFile +".pdf";
            } catch (IOException ex) {
                ex.printStackTrace();
                System.out.println("TEMP FILE NOT CREATED - ERROR in brainradiocheck");
            }

我认为临时文件创建得还可以，但如何将其文件路径作为字符串返回？我想将tempfile的文件路径设置为nopathbrain。

Andy

Answer 1

要访问资源jar，我使用以下语句：

this.getClass().getResourceAsStream("/es/app/firstTry/resources/button.jpg")

这将返回一个InputStream，因此您可以打开它或将其复制到任何目录。

Answer 2

//write the null file to tmp for copy
         try {
                java.io.InputStream iss = getClass().getResourceAsStream("/nullpdf.pdf");
                byte[] data = new byte[iss.available()];
                iss.read(data);
                iss.close();
                String tempFile = "file";
                File temp = File.createTempFile(tempFile, ".pdf");
                FileOutputStream fos = new FileOutputStream(temp);
                fos.write(data);
                fos.flush();
                fos.close();
            nopathbrain = temp.getAbsolutePath();
            System.out.println(tempFile);
            System.out.println(nopathbrain);
            } catch (IOException ex) {
                ex.printStackTrace();
                System.out.println("TEMP FILE NOT CREATED - ERROR in brainradiocheck");
            }

如果其他人也面临类似的问题，我自己回答。