I have a file called mybundle.txt in c:/temp -
c:/temp/mybundle.txt
How do I load this file into a java.util.ResourceBundle? The file is a valid resource bundle.
This does not seem to work:
java.net.URL resourceURL = null;
String path = "c:/temp/mybundle.txt";
java.io.File fl = new java.io.File(path);
try {
resourceURL = fl.toURI().toURL();
} catch (MalformedURLException e) {
}
URLClassLoader urlLoader = new URLClassLoader(new java.net.URL[]{resourceURL});
java.util.ResourceBundle bundle = java.util.ResourceBundle.getBundle( path ,
java.util.Locale.getDefault(), urlLoader );
This question is related to
java
resourcebundle
If, like me, you actually wanted to load .properties files from your filesystem instead of the classpath, but otherwise keep all the smarts related to lookup, then do the following:
java.util.ResourceBundle.ControlnewBundle() methodIn this silly example, I assume you have a folder at C:\temp which contains a flat list of ".properties" files:
public class MyControl extends Control {
@Override
public ResourceBundle newBundle(String baseName, Locale locale, String format, ClassLoader loader, boolean reload)
throws IllegalAccessException, InstantiationException, IOException {
if (!format.equals("java.properties")) {
return null;
}
String bundleName = toBundleName(baseName, locale);
ResourceBundle bundle = null;
// A simple loading approach which ditches the package
// NOTE! This will require all your resource bundles to be uniquely named!
int lastPeriod = bundleName.lastIndexOf('.');
if (lastPeriod != -1) {
bundleName = bundleName.substring(lastPeriod + 1);
}
InputStreamReader reader = null;
FileInputStream fis = null;
try {
File file = new File("C:\\temp\\mybundles", bundleName);
if (file.isFile()) { // Also checks for existance
fis = new FileInputStream(file);
reader = new InputStreamReader(fis, Charset.forName("UTF-8"));
bundle = new PropertyResourceBundle(reader);
}
} finally {
IOUtils.closeQuietly(reader);
IOUtils.closeQuietly(fis);
}
return bundle;
}
}
Note also that this supports UTF-8, which I believe isn't supported by default otherwise.
This worked for me very well. And it doesn't reload the bundle everytime. I tried to take some stats to load and reload the bundle from external file location.
File file = new File("C:\\temp");
URL[] urls = {file.toURI().toURL()};
ClassLoader loader = new URLClassLoader(urls);
ResourceBundle rb = ResourceBundle.getBundle("myResource", Locale.getDefault(), loader);
where "c:\temp" is the external folder (NOT on the classpath) holding the property files, and "myResource" relates to myResource.properties, myResource_fr_FR.properties, etc.
Note: If you have the same bundle name on your classpath then it will be picked up by default using this constructor of URLClassLoader.
Credit to http://www.coderanch.com/t/432762/java/java/absolute-path-bundle-file
Find some of the stats below, all time in ms. I am not worried about the initial load time as that could be something with my workspace or code that I am trying to figure out but what I am trying to show is the reload took way lesser telling me its coming from memory.
Here some of the stats:
The file name should have .properties extension and the base directory should be in classpath. Otherwise it can also be in a jar which is in classpath Relative to the directory in classpath the resource bundle can be specified with / or . separator. "." is preferred.
For JSF Application
To get resource bundle prop files from a given file path to use them in a JSF app.
basename property of loadBundle tag.
<f:loadBundle basename="Message" var="msg" />For basic implementation of extended RB please see the sample at Sample Customized Resource Bundle
/* Create this class to make it base class for Loading Bundle for JSF apps */
public class Message extends ResourceBundle {
public Messages (){
File file = new File("D:\\properties\\i18n");
ClassLoader loader=null;
try {
URL[] urls = {file.toURI().toURL()};
loader = new URLClassLoader(urls);
ResourceBundle bundle = getBundle("message", FacesContext.getCurrentInstance().getViewRoot().getLocale(), loader);
setParent(bundle);
} catch (MalformedURLException ex) { }
}
.
.
.
}
Otherwise, get the bundle from getBundle method but locale from others source like Locale.getDefault(), the new (RB)class may not require in this case.
When you say it's "a valid resource bundle" - is it a property resource bundle? If so, the simplest way of loading it probably:
try (FileInputStream fis = new FileInputStream("c:/temp/mybundle.txt")) {
return new PropertyResourceBundle(fis);
}
I would prefer to use the resourceboundle class to load the properties - just to get it done in one line instead of 5 lines code through stream, Properties class and load().
FYI ....
public void init(ServletConfig servletConfig) throws ServletException {
super.init(servletConfig);
try {
/*** Type1 */
Properties props = new Properties();
String fileName = getServletContext().getRealPath("WEB-INF/classes/com/test/my.properties");
// stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName);
// stream = ClassLoader.getSystemResourceAsStream("WEB-INF/class/com/test/my.properties");
InputStream stream = getServletContext().getResourceAsStream("/WEB-INF/classes/com/test/my.properties");
// props.load(new FileInputStream(fileName));
props.load(stream);
stream.close();
Iterator keyIterator = props.keySet().iterator();
while(keyIterator.hasNext()) {
String key = (String) keyIterator.next();
String value = (String) props.getProperty(key);
System.out.println("key:" + key + " value: " + value);
}
/*** Type2: */
// Just get it done in one line by rb instead of 5 lines to load the properties
// WEB-INF/classes/com/test/my.properties file
// ResourceBundle rb = ResourceBundle.getBundle("com.test.my", Locale.ENGLISH, getClass().getClassLoader());
ResourceBundle rb = ResourceBundle.getBundle("com.ibm.multitool.customerlogs.ui.nl.redirect");
Enumeration<String> keys = rb.getKeys();
while(keys.hasMoreElements()) {
String key = keys.nextElement();
System.out.println(key + " - " + rb.getObject(key));
}
} catch (IOException e) {
e.printStackTrace();
throw new ServletException("Error loading config.", e);
} catch (Exception e) {
e.printStackTrace();
throw new ServletException("Error loading config.", e);
}
}
ResourceBundle rb = ResourceBundle.getBundle("service"); //service.properties
System.out.println(rb.getString("server.dns")); //server.dns=http://....
As long as you name your resource bundle files correctly (with a .properties extension), then this works:
File file = new File("C:\\temp");
URL[] urls = {file.toURI().toURL()};
ClassLoader loader = new URLClassLoader(urls);
ResourceBundle rb = ResourceBundle.getBundle("myResource", Locale.getDefault(), loader);
where "c:\temp" is the external folder (NOT on the classpath) holding the property files, and "myResource" relates to myResource.properties, myResource_fr_FR.properties, etc.
Credit to http://www.coderanch.com/t/432762/java/java/absolute-path-bundle-file
If you wanted to load message files for different languages, just use the shared.loader= of catalina.properties... for more info, visit http://theswarmintelligence.blogspot.com/2012/08/use-resource-bundle-messages-files-out.html
public class One {
private static One one = null;
Map<String, String> configParameter = Collections.synchronizedMap(new HashMap<String, String>());
private One() {
ResourceBundle rb = ResourceBundle.getBundle("System", Locale.getDefault());
Enumeration en = rb.getKeys();
while (en.hasMoreElements()) {
String key = (String) en.nextElement();
String value = rb.getString(key);
configParameter.put(key, value);
}
}
public static One getInstance() {
if (one == null) {
one= new One();
}
return one;
}
public Map<String, String> getParameter() {
return configParameter;
}
public static void main(String[] args) {
String string = One.getInstance().getParameter().get("subin");
System.out.println(string);
}
}
I think that you want the file's parent to be on the classpath, not the actual file itself.
Try this (may need some tweaking):
String path = "c:/temp/mybundle.txt";
java.io.File fl = new java.io.File(path);
try {
resourceURL = fl.getParentFile().toURL();
} catch (MalformedURLException e) {
e.printStackTrace();
}
URLClassLoader urlLoader = new URLClassLoader(new java.net.URL[]{resourceURL});
java.util.ResourceBundle bundle = java.util.ResourceBundle.getBundle("mybundle.txt",
java.util.Locale.getDefault(), urlLoader );
1) Change the extension to properties (ex. mybundle.properties.)
2) Put your file into a jar and add it to your classpath.
3) Access the properties using this code:
ResourceBundle rb = ResourceBundle.getBundle("mybundle");
String propertyValue = rb.getString("key");
From the JavaDocs for ResourceBundle.getBundle(String baseName):
baseName- the base name of the resource bundle, a fully qualified class name
What this means in plain English is that the resource bundle must be on the classpath and that baseName should be the package containing the bundle plus the bundle name, mybundle in your case.
Leave off the extension and any locale that forms part of the bundle name, the JVM will sort that for you according to default locale - see the docs on java.util.ResourceBundle for more info.
This works for me:
File f = new File("some.properties");
Properties props = new Properties();
FileInputStream fis = null;
try {
fis = new FileInputStream(f);
props.load(fis);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (fis != null) {
try {
fis.close();
fis = null;
} catch (IOException e2) {
e2.printStackTrace();
}
}
}
Source: Stackoverflow.com