propertyloader.java

来自「一个可以存储和打印成绩单的系统」· Java 代码 · 共 64 行

package org.minjey.cjsjk.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import org.minjey.cjsjk.core.SysDict;

public class PropertyLoader {
	private static Properties properties = null;
	
	public static Properties loadProperty(String filename) throws IOException {
		Properties properties = null;
		File file = new File(filename);
		if(!file.exists()) {
			boolean saved = new PropertySetter().createNewDefaultProperty();
			if(saved) {
				return loadSystemProperty();
			}else{
				throw new IOException(filename + " (No such file or directory)");
			}
		} else {
			try {
				//FileReader reader = new FileReader(file);
				InputStream in = new FileInputStream(file);
				properties = new Properties();
				
				properties.load(in);
				System.out.println("Load Property File: " + filename + " Successd.");
				
			} catch (IOException e) {
				String message = filename + " (No such file or directory)";
				if(message.equals(e.getMessage())) {
					System.err.println(e);
					throw e;
				}else {
					e.printStackTrace();
				}
			}
		}
		return properties;
	}
	public static Properties loadSystemProperty() {
		String filename = SysDict.PROPERTYFILENAME;

		if(properties == null) {
			try {
				System.out.println("Attempt To Load System Property File: " + filename + ".");
				properties = loadProperty(filename);
			} catch (IOException e) {
				boolean saved = new PropertySetter().createNewDefaultProperty();
				if(saved) {
					properties = loadSystemProperty();
				}else{
					e.printStackTrace();
				}
			}
		}
		return properties;
	}
}