Java Way to read properties

The properties files are often read in daily use, and some of the Java read properties that you collect online are summarized as follows:

1, using the Java.util.Properties class of the load () method
Such as:

InputStream is = new Bufferedinputstream (new FileInputStream (the path to the properties file);
Properties Properties = new properties ();
Properties.load (IS);

2, the use of Java.util.ResourceBundle class Getbundle () method
Such as:

ResourceBundle RB = Resourcebundle.getbundle (name, Locale.getdefault ());

3, the use of the Java.util.PropertyResourceBundle class of constructors
Such as:

InputStream is = new Bufferedinputstream (new FileInputStream (name));
ResourceBundle RB = new propertyResourceBundle (IS);

4, the use of class variables getResourceAsStream () method
Such as:

InputStream in = class name. Class.getresourceasstream (name);
Properties P = new properties ();
P.load (in);

5. The getResourceAsStream () method of Java.lang.ClassLoader obtained by using Class.getclassloader ()
Such as:

InputStream in = class name. Class.getclassloader (). getResourceAsStream (name);
Properties P = new properties ();
P.load (in);

6, using the Java.lang.ClassLoader class of Getsystemresourceasstream () static method
Such as:

InputStream in = Classloader.getsystemresourceasstream (name);
Properties P = new properties ();
P.load (in);

Here are some code

Resourcebundleadapter class:

Package com.dengsilinming.read.properties;
Import java.util.Enumeration;
Import Java.util.Locale;
Import java.util.Properties;
Import Java.util.PropertyResourceBundle;

Import Java.util.ResourceBundle; /** * TODO Comment of Resourcebundleadapter * * @author dengsilinming * @version $Id: Resourcebundleadapter.java 2013 -1-30 PM 1:35:47 $/public class Resourcebundleadapter extends Properties {/** * */private static F

    inal long serialversionuid = 1L;
        Public Resourcebundleadapter (ResourceBundle RB) {assert (RB instanceof Java.util.PropertyResourceBundle);
        THIS.RB = RB;
        Enumeration<string> e = Rb.getkeys ();
            while (E.hasmoreelements ()) {Object o = e.nextelement ();
        This.put (O, Rb.getobject ((String) o));

    } private ResourceBundle RB = null;
    Public ResourceBundle Getbundle (String baseName) {return resourcebundle.getbundle (baseName); Public ResourceBundle GETbundle (String baseName, Locale Locale) {return Resourcebundle.getbundle (BaseName, Locale); ResourceBundle Getbundle (String baseName, Locale Locale, ClassLoader loader) {return resourcebundle
    . Getbundle (baseName, locale, loader);
    Public enumeration<?> Getkeys () {return Rb.getkeys ();
    Public Locale GetLocale () {return Rb.getlocale ();
    Public Object GetObject (String key) {return rb.getobject (key);
    public string getString (string key) {return rb.getstring (key);
    String[] Getstringarray (String key) {return Rb.getstringarray (key);
    } protected Object Handlegetobject (String key) {return (propertyResourceBundle) RB). Handlegetobject (key); }
}

Operateproperties class:

Package com.dengsilinming.read.properties;
Import Java.io.BufferedInputStream;
Import Java.io.FileInputStream;
Import java.io.IOException;
Import Java.io.InputStream;
Import java.util.Enumeration;
Import Java.util.Locale;
Import java.util.Properties;
Import Java.util.PropertyResourceBundle;


Import Java.util.ResourceBundle; /** * TODO Comment of jproperties * * @author dengsilinming * @version $Id: Jproperties.java 2013-1-30 1:34:32 $ *
    /public class Operateproperties {public final static int by_properties = 1;
    Public final static int by_resourcebundle = 2;
    Public final static int by_propertyresourcebundle = 3;
    Public final static int by_class = 4;
    Public final static int by_classloader = 5;

    Public final static int by_system_classloader = 6;  Public final static Properties Loadproperties (final String name, final int type) throws IOException {properties P
        = new Properties (); InputStream in = null;
            if (type = = by_properties) {in = new Bufferedinputstream (new FileInputStream (name));
            ASSERT (in!= null);
        P.load (in);
            else if (type = = By_resourcebundle) {ResourceBundle RB = Resourcebundle.getbundle (name, locale.english);
            ASSERT (RB!= null);
        p = new Resourcebundleadapter (RB);
            else if (type = = By_propertyresourcebundle) {in = new Bufferedinputstream (new FileInputStream (name));
            ASSERT (in!= null);
            ResourceBundle RB = new propertyResourceBundle (in);
        p = new Resourcebundleadapter (RB);
            else if (type = = By_class) {assert (OperateProperties.class.equals (new Operateproperties (). GetClass ()));
            in = OperateProperties.class.getResourceAsStream (name);
            ASSERT (in!= null);
            P.load (in);
        return new Jproperties (). GetClass (). getResourceAsStream (name); } ELSE if (type = = By_classloader) {assert (OperateProperties.class.getClassLoader (). Equals (New Operatepropertie
            S (). GetClass (). getClassLoader ());
            in = OperateProperties.class.getClassLoader (). getResourceAsStream (name);
            ASSERT (in!= null);
            P.load (in);
        return new Jproperties (). GetClass (). getClassLoader (). getResourceAsStream (name);
            else if (type = = By_system_classloader) {in = Classloader.getsystemresourceasstream (name);
            ASSERT (in!= null);
        P.load (in);
        } if (in!= null) {in.close ();
    } return p; public static class Resourcebundleadapter extends Properties {/** * * */PRIV

        Ate static final long serialversionuid = 1L;
            Public Resourcebundleadapter (ResourceBundle RB) {assert (RB instanceof Java.util.PropertyResourceBundle);
            THIS.RB = RB; EnumeratiOn<string> e = Rb.getkeys ();
                while (E.hasmoreelements ()) {Object o = e.nextelement ();
            This.put (O, Rb.getobject ((String) o));

        } private ResourceBundle RB = null;
        Public ResourceBundle Getbundle (String baseName) {return resourcebundle.getbundle (baseName); ResourceBundle Getbundle (String baseName, Locale Locale) {return Resourcebundle.getbundle (b
        Asename, Locale); ResourceBundle Getbundle (String baseName, Locale Locale, ClassLoader loader) {return resour
        Cebundle.getbundle (baseName, locale, loader);
        Public enumeration<?> Getkeys () {return Rb.getkeys ();
        Public Locale GetLocale () {return Rb.getlocale ();
        Public Object GetObject (String key) {return rb.getobject (key); public string getString (string Key) {return rb.getstring (key);
        String[] Getstringarray (String key) {return Rb.getstringarray (key); } protected Object Handlegetobject (String key) {return ((propertyResourceBundle) RB). Handlegetobject
        (key); }
    }
}

Propertiestest class:

Package com.dengsilinming.read.properties;

Import java.util.Properties;

Import Junit.framework.TestCase; /** * TODO Comment of Propertiestest * * @author dengsilinming * @version $Id: Propertiestest.java 2013-1-30 afternoon 1:40:5
    2 $ */public class Propertiestest extends TestCase {operateproperties jproperties;
    String key = "Helloworld.title";

    String value = "Hello world!";
        public void Testloadproperties () throws Exception {String name = null;

        Properties P = new properties ();
        Name = "F:/workspace/dailypractise/src/com/dengsilinming/read/properties/localeproperties.properties";
        p = operateproperties.loadproperties (name, operateproperties.by_properties);

        Assertequals (value, P.getproperty (key));
        Name = "Com.dengsilinming.read.properties";
        p = operateproperties.loadproperties (name, operateproperties.by_resourcebundle);
        Assertequals (value, P.getproperty (key)); Assertequals (Value,((Operateproperties.resourcebundleadapter) p). GetString (key));
        Name = "F:/workspace/dailypractise/src/com/dengsilinming/read/properties/localeproperties.properties";
        p = operateproperties.loadproperties (name, operateproperties.by_propertyresourcebundle);
        Assertequals (value, P.getproperty (key));

        Assertequals (value, (Operateproperties.resourcebundleadapter) p). GetString (key));
        Name = "\\com\\dengsilinming\\read\\properties\\localeProperties.properties";
        p = operateproperties.loadproperties (name, Operateproperties.by_system_classloader);

        Assertequals (value, P.getproperty (key));
        Name = "\\com\\dengsilinming\\read\\properties\\localeProperties.properties";
        p = operateproperties.loadproperties (name, Operateproperties.by_classloader);

        Assertequals (value, P.getproperty (key));
        Name = "\\properties\\localeProperties.properties"; p = operateproperties.loadproperties (name, Operateproperties.by_clasS);
    Assertequals (value, P.getproperty (key)); }
}

The attached code in the runtime is the error, everyone to modify it, are some very easy questions, but do not lazy oh

The point to note is this: this is an article I read on the Internet, I have slightly changed some of the code, because I did not pay much attention to the origin of the article, so I apologize to the original author