gproperties.java

用Swing实现的CHM制作工具

package g2w.app.gchm.lib;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;

/**
 * Extended properties.
 * 
 * @author GreatGhoul
 * @version 002 2009-3-10 23:01:26
 */
public class GProperties extends Properties {
	File file = null;
	FileInputStream is = null;
	FileOutputStream os = null;
	
	/**
	 * Contstructs a blank properties file.
	 */
	public GProperties() {
		super();
	}
	
	/**
	 * Constructs a properties file using specified file path <i>path<i>,
	 * then automatically load it.
	 * 
	 * @param path The path of the properties file.
	 * @throws IOException 
	 */
	public GProperties(String path) throws IOException {
		super();
		file = new File(path);
		load();
	}
	
	/**
	 * Loads the properties file using a proper parser.
	 * 
	 * @throws IOException 
	 */
	private void load() throws IOException {
		if (file == null) {
			throw new IOException("No file specifed");
		} else if (file.exists()) {
			is = new FileInputStream(file);
			if (file.getName().toLowerCase().endsWith(".xml")) {
				super.loadFromXML(is);
			} else
				super.load(is);
			is.close();
		}
	}
	
	/**
	 * Loads a new properties file using specified file path <i>path</i>.
	 * 
	 * @param filename The specified path.
	 * @throws IOException 
	 */
	public void load(String filename) throws IOException {
		file = new File(filename);
//		load();
	}
	
	/**
	 * 重载方法,识别文件类型,并采用相应的保存方式
	 * @param out 输出流
	 * @param comments 属性列表的描述
	 */
	public void store(OutputStream out, String comments) throws IOException {
		if (file.getName().toLowerCase().endsWith(".xml"))
			super.storeToXML(out, comments);
		else
			super.store(out, comments);
		out.close();
	}
	
	/**
	 * 存储配置文件,不添加注释
	 * @throws IOException
	 */
	public void store() throws IOException {
		if (file == null) {
			throw new IOException("No file specified");
		} if (os == null) {
			os = new FileOutputStream(file);
			store(os, null);
		}
	}
	
	/**
	 * 存储配置文件,添加注释
	 * @param comments 注释
	 * @throws IOException
	 */
	public void store(String comments) throws IOException {
		if (file == null) {
			throw new IOException("No file specified");
		} if (os == null) { 
			os = new FileOutputStream(file);
			store(os, comments);
		}
	}
	
	/**
	 * 以path为路径存储配置文件
	 * @param path 文件路径
	 * @throws IOException
	 */
	public void storeTo(String path) throws IOException {
		load(path);
		if (os == null)
			os = new FileOutputStream(file);
		store(os, null);
	}
	
	/**
	 * 以path为路径存储配置文件
	 * @param path 文件路径
	 * @throws IOException
	 */
	public void storeTo(String path, String comments) throws IOException {
		load(path);
		if (os == null)
			os = new FileOutputStream(file);
		store(os, comments);
	}
	
	/**
	 * 在屏幕上打印属性列表
	 */
	public void list() {
		super.list(System.out);
	}
	
	public static void main(String[] args) {
		try {
			GProperties p = new GProperties();
			p.setProperty("CurrentProjectPath", "C:\\Documents and Settings\\GreatGhoul\\My Documents\\chm demo\\");
			p.list();
			p.storeTo("config/config.xml");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}