FileBrowser.java

package feel.good;
import java.io.*;
import java.net.URL;
import javax.swing.JFileChooser;
import javax.swing.JTextField;
import java.nio.CharBuffer;
// von mir website@luna-net.org
public class FileBrowser {
		private JTextField jtfStatus;
		private JFileChooser fileChooser;
	//	private URL url;
		public String startDir = ".";
	//	public String startDir;
	//	private String str;
		private File file;
	//	private StringBuffer sb;
	//	private BufferedReader bufReader;
	//	private FileReader reader;
		
	        public File getFile(){
		return file;
    		}
    	
    		public FileBrowser(JTextField jtfStatus) {
		this.jtfStatus=jtfStatus;
		}
    		
	public URL chooseURL(String title, String startdir) {
	 URL url=null;	
	 fileChooser = new JFileChooser(new File(startDir));
	 int returnVal = fileChooser.showDialog(null, title);
	     if(returnVal == JFileChooser.APPROVE_OPTION) {
		     try {
			url = fileChooser.getSelectedFile().toURL(); //auswahl
	//auswahl 	url = fileChooser.getCurrentDirectory().toURL();
			 } catch (java.net.MalformedURLException murlex) {
			  jtfStatus.setText("MalformedURLException: " 
			+murlex.getMessage());
	//		file = fileChooser.getSelectedFile().getAbsoluteFile();
			} 
      	      } else if (returnVal == JFileChooser.CANCEL_OPTION) {
		  jtfStatus.setText("No file choosen");
		  }
              return url;  
	}
	

	
    public String chooseText(String title, String startdir) {
		file=null;
		fileChooser = new JFileChooser(new File(startDir));
		int returnVal = fileChooser.showDialog(null, title);
//auswahl	if(returnVal == JFileChooser.APPROVE_OPTION) { 
		if(returnVal == JFileChooser.OPEN_DIALOG) { //auswahl
		file = fileChooser.getSelectedFile();
		} else if(returnVal == JFileChooser.CANCEL_OPTION)  {
		return null;
		}		
		FileReader reader=null;
		try {
		  reader = new FileReader(file);
		} catch (FileNotFoundException fnfe) {
		  System.out.println("FileNotFoundException: "
		  +fnfe.getMessage());
		  }
		BufferedReader bufReader=new BufferedReader(reader);
		String str;
		StringBuffer sb=new StringBuffer();
		try {
		  while ((str=bufReader.readLine()) != null) {
		    sb.append(str);
		    // Zeilenschaltung ergänzen
		    sb.append(System.getProperty("line.separator"));
		  }
		  bufReader.close();
		} catch (IOException ioe) {
		System.out.println("IOException: "
		+ioe.getMessage());
	          }
	  	return sb.toString();
	} 
	// für den Bedingungsablauf in der verarbeitenden Klasse nun mit throws IOException	
    public void saveFile(File file, String text) //throws IOException
     {
    	
  	try { 
   	  BufferedWriter bufWriter=new BufferedWriter(new FileWriter(file));
   	  bufWriter.write(text);
   	  bufWriter.flush();
   	  bufWriter.close();
  	} catch (IOException ioe) {
    	  jtfStatus.setText("IOException: "+ioe.getMessage());
   	  }
    }
        public File saveFileAs(String text, String title, String startDir){
	File file;
	fileChooser = new JFileChooser(new File(startDir));
	fileChooser.setDialogType(JFileChooser.SAVE_DIALOG);
	fileChooser.setApproveButtonText(title);
	int returnVal = fileChooser.showDialog(jtfStatus, null);
	if(returnVal == JFileChooser.APPROVE_OPTION){
	    file = fileChooser.getSelectedFile();
	    saveFile(file, text);
	    jtfStatus.setText("Text in Datei \""+ file +"\" gespeichert.");
	    return file;
	}else if(returnVal == JFileChooser.CANCEL_OPTION){
	    jtfStatus.setText("Save-dialog escaped");
	}
	return null;
    }	
}