使用J2SE API讀取Properties文件的六種方法

1。使用Java.util.PropertIEs類的load()方法
示例： InputStream in = lnew BufferedInputStream(new FileInputStream(name));
Properties p = new PropertIEs();
p.load(in);

2。使用Java.util.ResourceBundle類的getBundle()方法
示例： ResourceBundle rb = ResourceBundle.getBundle(name, Locale.getDefault());

3。使用Java.util.PropertyResourceBundle類的構造函數
示例： InputStream in = new BufferedInputStream(new FileInputStream(name));
ResourceBundle rb = new PropertyResourceBundle(in);

4。使用class變量的getResourceAsStream()方法
示例： InputStream in = JPropertIEs.class.getResourceAsStream(name);
Properties p = new PropertIEs();
p.load(in);

5。使用class.getClassLoader()所得到的Java.lang.ClassLoader的getResourceAsStream()方法
示例： InputStream in = JPropertIEs.class.getClassLoader().getResourceAsStream(name);
Properties p = new PropertIEs();
p.load(in);

6。使用Java.lang.ClassLoader類的getSystemResourceAsStream()靜態方法
示例： InputStream in = ClassLoader.getSystemResourceAsStream(name);
Properties p = new PropertIEs();
p.load(in);

補充

Servlet中可以使用Javax.servlet.ServletContext的getResourceAsStream()方法
示例：InputStream in = context.getResourceAsStream(path);
Properties p = new PropertIEs();
p.load(in);

完整的示例，可以參考附件文件
如何上傳文件，誰知道請告訴以下。 只好把source都貼上來了
JPropertIEs.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

http://www.mscto.com

** 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);

軟件開發網

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) {

軟件開發網

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) {

[1] [2] 下一頁