filemsgbean.java

基于java的文件管理系统 能实现包括文件的创建、删除、查找等功能

package fileSys.util;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.Reader;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

/**
 * 
 * 属性文件操作类
 */
public class FileMsgBean {

	/**
	 * 获得所有文件的属性信息
	 * @return 所有文件的属性信息
	 * @throws Exception
	 */
	public Map<String, FileMessage> getFileMsgMap() throws Exception {

		Map<String, FileMessage> fileMsgMap = new HashMap<String, FileMessage>();
		String alineMsg;
		String[] msgs;
		FileMessage fileMsg;

		File file = new File("/main/.fileMsg.txt");
		if (!(file.exists())) {
			return fileMsgMap;
		}
		Reader reader = new FileReader("/main/.fileMsg.txt");
		BufferedReader bufferedReader = new BufferedReader(reader);

		while ((alineMsg = bufferedReader.readLine()) != null) {

			fileMsg = new FileMessage();
			msgs = alineMsg.split(" ");
			fileMsg.setFileName(msgs[0]);
			fileMsg.setUserName(msgs[1]);
			fileMsg.setSaveCode(msgs[2]);
			fileMsgMap.put(msgs[0], fileMsg);
		}
		
		bufferedReader.close();
		reader.close();
		return fileMsgMap;
	}

	/**
	 * 保存文件的属性信息
	 * @param fileMsgMap 所有文件的属性信息
	 * @throws Exception
	 */
	public void saveFileMsgMap(Map<String, FileMessage> fileMsgMap)
			throws Exception {

		File file = new File("/main/.fileMsg.txt");
		if (file.exists())
			file.delete();
		file.createNewFile();

		Writer writer = new FileWriter("/main/.fileMsg.txt");
		BufferedWriter bufferedWriter = new BufferedWriter(writer);

		Set<String> filenames = fileMsgMap.keySet();
		String userName;
		String saveCode;

		for (String filename : filenames) {
			
			userName = ((FileMessage) fileMsgMap.get(filename)).getUserName();
			saveCode = ((FileMessage) fileMsgMap.get(filename)).getSaveCode();
			bufferedWriter.write(filename + " " + userName + " " + saveCode);
			bufferedWriter.newLine();
		}

		bufferedWriter.close();
		writer.close();
	}

}