Java 導出txt檔案

package com.test;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;

public class Export {
	
	public static void main(String[] args) {
		List<String> list = new ArrayList<String>();
		list.add("Hello,World!");  
		list.add("Hello,World!");  
		list.add("Hello,World!");  
		list.add("Hello,World!");  

		File file = new File("D:/123.txt");
      	if(!file.exists()){
         	file.mkdir();
       	}
    	boolean isSuccess=exportTxt(file, list);
    	System.out.println(isSuccess);
	}

	/**
	 * 導出
	 * 
	 * @param file
	 *            Txt檔案(路徑+檔案名)，Txt檔案不存在會自動建立
	 * @param dataList
	 *            資料
	 * @return
	 */
	public static boolean exportTxt(File file, List<String> dataList) {
		FileOutputStream out = null;
		try {
			out = new FileOutputStream(file);
			return exportTxtByOS(out, dataList);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
			return false;
		}
	}

	/**
	 * 導出
	 * 
	 * @param out
	 *            輸出流
	 * @param dataList
	 *            資料
	 * @return
	 */
	public static boolean exportTxtByOS(OutputStream out, List<String> dataList) {
		boolean isSucess = false;

		OutputStreamWriter osw = null;
		BufferedWriter bw = null;
		try {
			osw = new OutputStreamWriter(out);
			bw = new BufferedWriter(osw);
			// 循環資料
			for (int i = 0; i < dataList.size(); i++) {
				bw.append(dataList.get(i)).append("\r\n");
			}
			
			isSucess = true;
		} catch (Exception e) {
			e.printStackTrace();
			isSucess = false;

		} finally {
			if (bw != null) {
				try {
					bw.close();
					bw = null;
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			if (osw != null) {
				try {
					osw.close();
					osw = null;
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
			if (out != null) {
				try {
					out.close();
					out = null;
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}

		return isSucess;
	}

}