使用J2SE API读取Properties文件的方法

cellspacing="0" cellpadding="2" bordercolorlight = "black" 

  bordercolordark = "#FFFFFF" align="center">  InputStream in = 
lnew BufferedInputStream
(new FileInputStream(name));
Properties p = new Properties();
p.load(in);  

ResourceBundle rb =
ResourceBundle.getBundle(name, 
Locale.getDefault()); 

InputStream in = 
new BufferedInputStream(new FileInputStream(name));
ResourceBundle rb =
new PropertyResourceBundle(in);  

InputStream in = 
JProperties.class.getResourceAsStream(name);
Properties p = new Properties();
p.load(in);  

InputStream in = 
JProperties.class.getClassLoader()
.getResourceAsStream(name);
Properties p = new Properties();
p.load(in);  

InputStream in = 
ClassLoader.getSystemResourceAsStream(name);
Properties p = new Properties();
p.load(in);  

InputStream in = 
context.getResourceAsStream(path);
Properties p = new Properties();
p.load(in);  

/**
** This program is free software.
** 
** You may redistribute it and
/or modify it under the terms of the GNU
** General Public License as 
published by the Free Software Foundation.
** Version 2 of the license should 
be included with this distribution in
** the file LICENSE, as well as
License.html. If the license is not
** included with this distribution, 
you may find a copy at the FSF web
** site at 'www.gnu.org' or 
'www.fsf.org', or you may write to the
** Free Software Foundation,
675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED
AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY
OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES
_NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM
THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
**/
package com.kindani;
//import javax.servlet.ServletContext;
import java.util.*;
import java.io.InputStream;
import java.io.IOException;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
/**
* 使用J2SE API?取Properties文件的六?方法
* User: SYNFORM
* Date: 2005/07/12
* Time: 18:40:55
* To change this template use File
| Settings | File Templates.
*/
public class JProperties 
{
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.getDefault());
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 (JProperties.class.equals(new JProperties().getClass()));
in = JProperties.class.
getResourceAsStream(name);
assert (in != null);
p.load(in);
//  return new JProperties().getClass().
getResourceAsStream(name);
} else if (type == BY_CLASSLOADER) 
{
assert (JProperties.class.
getClassLoader().equals
(new JProperties().getClass().
getClassLoader()));
in = JProperties.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;
}
//servlet used
/*
public static Properties loadProperties
(ServletContext context, String path)
throws IOException 
{
assert (context != null);
InputStream in = context.
getResourceAsStream(path);
assert (in != null);
Properties p = new Properties();
p.load(in);
in.close();
return p;
}
*/
//support class
/**
* ResourceBundle Adapter class.
*/
public static class
ResourceBundleAdapter extends Properties
{
public ResourceBundleAdapter
(ResourceBundle rb) 
{
assert (rb instanceof 
java.util.PropertyResourceBundle);
this.rb = rb;
java.util.Enumeration 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);
}
public 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);
}
public String[] getStringArray(String key) 
{
return rb.getStringArray(key);
}
protected Object handleGetObject(String key) 
{
return ((PropertyResourceBundle)
rb).handleGetObject(key);
}
}
} 
JPropertiesTest.java文件 
/**
** This program is free software.
** 
** You may redistribute it and/
or modify it under the terms of the GNU
** General Public License as 
published by the Free Software Foundation.
** Version 2 of the license should 
be included with this distribution in
** the file LICENSE, as well as
License.html. If the license is not
** included with this distribution,
you may find a copy at the FSF web
** site at 'www.gnu.org' or 'www.fsf.org',
or you may write to the
** Free Software Foundation, 
675 Mass Ave, Cambridge, MA 02139 USA.
**
** THIS SOFTWARE IS PROVIDED 
AS-IS WITHOUT WARRANTY OF ANY KIND,
** NOT EVEN THE IMPLIED WARRANTY 
OF MERCHANTABILITY. THE AUTHOR
** OF THIS SOFTWARE, ASSUMES 
_NO_ RESPONSIBILITY FOR ANY
** CONSEQUENCE RESULTING FROM 
THE USE, MODIFICATION, OR
** REDISTRIBUTION OF THIS SOFTWARE. 
**/
package com.kindani.test;
import junit.framework.*;
import com.kindani.JProperties;
//import javax.servlet.ServletContext;
import java.util.Properties;
public class JPropertiesTest extends TestCase 
{
JProperties jProperties;
String key = "helloworld.title";
String value = "Hello World!";
public void testLoadProperties() 
throws Exception {
String name = null;
Properties p = new Properties();
name = "C:\\IDEAP\\Properties4Methods
\\src\\com\\kindani\\test
\\LocalStrings.properties";
p = JProperties.loadProperties
(name, JProperties.BY_PROPERTIES);
assertEquals
(value, p.getProperty(key));
name = "com.kindani.test.LocalStrings";
p = JProperties.loadProperties(name,
JProperties.BY_RESOURCEBUNDLE);
assertEquals(value, p.getProperty(key));
assertEquals(value,
((JProperties.ResourceBundleAdapter)p)
.getString(key));
name = "C:\\IDEAP\\Properties4Methods\\
src\\com\\kindani\\test\\
LocalStrings.properties";
p = JProperties.loadProperties(name, JProperties.BY_PROPERTYRESOURCEBUNDLE);
assertEquals(value, p.getProperty(key));
assertEquals(value,
((JProperties.ResourceBundleAdapter)p).
getString(key));
name = "\\com\\kindani\\test\\
LocalStrings.properties";
p = JProperties.loadProperties(name, JProperties.BY_SYSTEM_CLASSLOADER);
assertEquals(value, p.getProperty(key));
name = "\\com\\kindani\\test\\
LocalStrings.properties";
p = JProperties.loadProperties(name, JProperties.BY_CLASSLOADER);
assertEquals(value, p.getProperty(key));
name = "test\\LocalStrings.properties";
p = JProperties.loadProperties(name, 
JProperties.BY_CLASS);
assertEquals(value, p.getProperty(key));
}
/*
public void testLoadProperties2()
throws Exception 
{
ServletContext context = null;
String path = null;
Properties p = null;
path = "/WEB-INF/classes
/LocalStrings.properties";
p = JProperties.loadProperties(context, path);
assertEquals(value, p.getProperty(key));
}
*/
}
properties文件与JPropertiesTest.
java文件相同的目录下
LocalStrings.properties文件
# $Id: LocalStrings.properties,
v 1.1 2000/08/17 00:57:52 horwat Exp $
# Default localized resources
for example servlets
# This locale is en_US
helloworld.title=Hello World!
requestinfo.title=Request 
Information Example
requestinfo.label.method=Method:
requestinfo.label.requesturi=Request URI:
requestinfo.label.protocol=Protocol:
requestinfo.label.pathinfo=Path Info:
requestinfo.label.remoteaddr=Remote Address:
requestheader.title=Request Header Example
requestparams.title=Request
Parameters Example
requestparams.params-in-req=Parameters
in this request:
requestparams.no-params=No Parameters,
Please enter some
requestparams.firstname=First Name:
requestparams.lastname=Last Name:
cookies.title=Cookies Example
cookies.cookies=Your browser is 
sending the following cookies:
cookies.no-cookies=Your browser 
isn't sending any cookies
cookies.make-cookie=Create a
cookie to send to your browser
cookies.name=Name:
cookies.value=Value:
cookies.set=You just sent the 
following cookie to your browser:
sessions.title=Sessions Example
sessions.id=Session ID:
sessions.created=Created:
sessions.lastaccessed=
Last Accessed:
sessions.data=The following 
data is in your session:
sessions.adddata=Add data
to your session
sessions.dataname=Name of
Session Attribute:
sessions.datavalue=Value 
of Session Attribute: