Schlagwort: schreiben

Mit Java in eine Textdatei schreiben

Mit dem folgendem Code kann ein beliebiger Inhalt in eine Textdatei geschrieben werden. Sollte die Datei bereits existieren, wird der Text am Ende der Datei angefügt:

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
 
public class SimpleFileWriter
{
 
  static final Logger logger = Logger.getLogger(SimpleFileWriter.class.getName());
 
  public static void writeFile(String pathName, String content) throws IOException
  {
    File file = new File(pathName);
    try (FileWriter writer = new FileWriter(file, true))
    {
      writer.write(content);
      writer.flush();
    }
  }
 
  public static void main(String[] args)
  {
    try
    {
      writeFile("C:/Temp/test.txt", "Hello World!" + System.getProperty("line.separator", "\r\n"));
      System.out.println("Data was successfully written.");
    }
    catch (IOException ex)
    {
      logger.log(Level.WARNING, ex.getLocalizedMessage());
    }
  }
}

Eigenes jQuery-Plugin selbst schreiben

Das JavaScript-Framework jQuery lässt sich ganz leicht mit eigenen Plugins erweitern. Wie das geht, seht ihr hier:

HTML-Code

1
2
3
4
5
6
7
8
9
10
11
12

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>jQuery Plugin Example</title>
  </head>
  <body> 
    <div id="my_div"></div>
    <script src="./js/jquery.js"></script>
    <script src="./js/my_jquery_plugin.js"></script>
  </body>
</html>

my_jquery_plugin.js

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

(function($)
  {
    $.fn.myPlugin = function(title, params)
    {      
      var object = $(this);
      $.extend(object, params); 
      alert(title);
      alert(object.greeting);
      alert(object.isReceived);
      return this; // to allow jQuery chaining
    }
  })(jQuery);
 
$('#my_div').myPlugin('This comes from my jQuery plugin.',
{
  greeting: 'Hello World!',
  isReceived: true
});

my_jquery_plugin.js mit Standard-Einstellungen

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

(function($){
  $.fn.myPlugin = function(params)
  {      
    var settings = 
    {
      firstName:'Max',
      lastName:'Mustermann'
    };
    if (params) 
    { 
      $.extend(settings, params);
    }
    alert(settings.firstName+' '+settings.lastName);
    return this;
  }
})(jQuery);
 
$('#my_div').myPlugin({firstName:'Benny'});

my_jquery_plugin.js mit Funktionsnamen als Parameter

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

(function($)
  {
    function myRedFunction(element, settings)
    {
      $(element).css({
        width:'200px', 
        height:'200px', 
        backgroundColor:'red'
      }).html(settings.firstName+' '+settings.lastName);
    }
 
    $.fn.myPlugin = function(params)
    {
      var settings = 
      {
        firstName:'Max',
        lastName:'Mustermann',
        callback:myRedFunction
      };
      if (params) 
      { 
        $.extend(settings, params);
      }
      return settings.callback(this, settings);
    }
  })(jQuery);
 
function myBlueFunction(element, settings)
{
  $(element).css({
    width:'200px', 
    height:'200px', 
    backgroundColor:'blue'
  }).html(settings.firstName+' '+settings.lastName);
}
 
$('#my_div').myPlugin({
  firstName:'Benny', 
  lastName:'Neugebauer',
  callback:myBlueFunction
});

Eine gute Basis für ein jQuery-Plugin könnte wie folgt aussehen:

HTML-Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>My jQuery-Plugin</title>
    <style type="text/css">
      * { margin: 0; padding: 0; border: 0; }
      html { background-color: wheat; }
      #testdiv
      {
        width: 400px;
        height: 400px;
        background-color: sienna;
      }
    </style>
  </head>
  <body>
    <div id="testdiv"></div>
    <script src="./js/jquery.js"></script>
    <script src="./js/my_jquery_plugin.js"></script>
    <script type="text/javascript">
      jQuery(document).ready(function($)
      {
        $('#testdiv').myPlugin();
      });
    </script>
  </body>
</html>

JavaScript Code:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

(function($)
  {
    function mergeSettings(parameters)
    {
      var settings = {
      };
      if (parameters) 
        $.extend(settings, parameters);
      return settings;
    }
 
    $.fn.myPlugin = function(parameters)
    { 
      var element = $(this);
      var settings = mergeSettings(parameters);
      alert('Plugin activated on: '+element.attr('id'));
      return element;
    }
  })(jQuery);