有没有办法在Windows下使用java.util.Preferences而不使用Registry作为后端？ [英] Is there a way to use java.util.Preferences under Windows without it using the Registry as the backend?

问题描述

我想使用java.util.Preferences API，但我不希望我的程序尝试读取或写入Windows注册表。我该怎么做？

I want to use the java.util.Preferences API but I don't want my program to attempt to read or write to the Windows registry. How would I go about this?

推荐答案

我相信你已经阅读了使用Java读取/写入Windows注册表，然后在使用<$ c $时，您希望拥有另一个后端而不是注册表c> java.util.Preferences API

I trust you have read the read/write to Windows Registry using Java and you then want to have another back-end than the registry when using the java.util.Preferences API

你可以扩展 首选项 API ，如 Bernhard 或 Croft ，如这篇文章：

You could extend the Preference API, like Bernhard or Croft did, as described in this article:

因为首选项API 是后端中立的，您无需关心是否数据存储在文件，数据库表或特定于平台的存储中，例如Windows注册表。

Because the Preferences API is back-end neutral, you need not care whether the data are stored in files, database tables, or a platform-specific storage such as the Windows Registry.

通过< a href =http://code.ohloh.net/search?s=%22java.util.prefs.AbstractPreferences%22&pp=0&fl=Java&ff=1&mp=1&ml=1&me = 1& md = 1& filterChecked = truerel =nofollow noreferrer>新首选项可以在这里看到。

Examples of extensions through new Preferences can be seen here.

IMO比使用其他API更好。

That is better, IMO, than to use another API.

例如，搜索扩展的类 java.util.prefs.AbstractPreferences ：

For instance, searching for classes extending java.util.prefs.AbstractPreferences:

• 您可以使用由XML文件支持的首选项存储：

de.unika.ipd.grgen.util.MyPreferences

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.prefs.AbstractPreferences;
import java.util.prefs.BackingStoreException;

/**
 * Own implementation of the Java preferences API, that does not use
 * a "OS backing store" but relies on importing and exporting the
 * preferences via xml files.
 * Also, If a preference is got, but was not in the tree, it is entered.
 */
public class MyPreferences extends AbstractPreferences {

    private Map<String, String> prefs = new HashMap<String, String>();
    private Map<String, AbstractPreferences> children = new HashMap<String, AbstractPreferences>();

  public MyPreferences(MyPreferences parent, String name) {
    super(parent, name);
  }

  /**
   * @see java.util.prefs.AbstractPreferences#putSpi(java.lang.String, java.lang.String)
   */
  protected void putSpi(String key, String value) {
    prefs.put(key, value);
  }

---

• 或者您可以将这些首选项存储在LDAP中：



de.tarent.ldap.prefs.LDAPSystemPreferences

import java.util.prefs.AbstractPreferences;
import java.util.prefs.BackingStoreException;

import javax.naming.NamingException;
import javax.naming.directory.Attributes;

import de.tarent.ldap.LDAPException;
import de.tarent.ldap.LDAPManager;

/**
 * @author kirchner
 * 
 * Preferences im LDAP
 */
public class LDAPSystemPreferences extends AbstractPreferences {
    LDAPManager     ldm         = null;
    Properties      properties  = new Properties();
    //Map für key/value der Preferences
    Map             cache       = new HashMap();
    //Map für timestamp der Preferences
    Map             timestamp   = new HashMap();
    private Boolean deleted     = Boolean.FALSE;





---






• 或者你可以使用简单的属性文件：



com.adito.boot.PropertyPreferences ：

import java.util.prefs.AbstractPreferences;
import java.util.prefs.BackingStoreException;
import java.util.prefs.Preferences;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;


/**
 * A simple implementation for the preferences API. That stores preferences
 * in propery files. We do not have to worry about sharing the preferencese 
 * with other JVM instance so there is no need for any kind of synchronising
 * or locking.
 */
public class PropertyPreferences extends AbstractPreferences {

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