lfile.java

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package myfile;

import java.io.*;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

public class LFile {
	public static void save(String str){
		System.out.print("保存");
		JFileChooser chooser = new JFileChooser();
		FileWriter fileWriter;
		File file;
		
		chooser.setDialogTitle("保存");
		chooser.showSaveDialog(null);
		file = chooser.getSelectedFile();
		
		try{
			fileWriter = new FileWriter(file);
			fileWriter.write(str);
			fileWriter.close();
		}catch(FileNotFoundException e){
			System.out.println("FileNotFoundException");
		}catch(IOException e){
			System.out.println("IOException");
		}
	}
	
	public static String read(){
		System.out.print("读取");
		JFileChooser chooser = new JFileChooser();
		FileReader fileReader;
		File file;
		
		chooser.setDialogTitle("载入");
		chooser.showDialog(null,"载入");
		
		
		file = chooser.getSelectedFile();
		String str = "";
		
		
		try{
			fileReader = new FileReader(file);
			if(fileReader.read()!=-1){
				BufferedReader br = new BufferedReader(fileReader);
				str = br.readLine();
			}
			fileReader.close();
		}catch(FileNotFoundException e){
			System.out.println("FileNotFoundException");
		}catch(IOException e){
			System.out.println("IOException");
		}
		
		return str;
	}

}