import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter; public class txtExport {  private static String path = "D:/"; private static String filenameTemp;  public static void main(String[] args) throws IOException { txtExport.creatTxtFile("你好"); txtExport.writeTxtFile("你好"); }   /** * 創建文件 *  * @throws IOException */ public static boolean creatTxtFile(String name) throws IOException { boolean flag = false; filenameTemp = path + name + ".txt"; File filename = new File(filenameTemp); if (!filename.exists()) {  filename.createNewFile();  flag = true; } return flag; }  /** * 寫文件 *  * @param newStr *      新內容 * @throws IOException */ public static boolean writeTxtFile(String newStr) throws IOException { // 先讀取原有文件內容，然后進行寫入操作 boolean flag = false; String filein = newStr + "/r/n"; String temp = "";  FileInputStream fis = null; InputStreamReader isr = null; BufferedReader br = null;  FileOutputStream fos = null; PrintWriter pw = null; try {  // 文件路徑  File file = new File(filenameTemp);  // 將文件讀入輸入流  fis = new FileInputStream(file);  isr = new InputStreamReader(fis);  br = new BufferedReader(isr);  StringBuffer buf = new StringBuffer();   // 保存該文件原有的內容  for (int j = 1; (temp = br.readLine()) != null; j++) {  buf = buf.append(temp);  // System.getProperty("line.separator")  // 行與行之間的分隔符 相當于“/n”  buf = buf.append(System.getProperty("line.separator"));  }  buf.append(filein);   fos = new FileOutputStream(file);  pw = new PrintWriter(fos);  pw.write(buf.toString().toCharArray());  pw.flush();  flag = true; } catch (IOException e1) {  // TODO 自動生成 catch 塊  throw e1; } finally {  if (pw != null) {  pw.close();  }  if (fos != null) {  fos.close();  }  if (br != null) {  br.close();  }  if (isr != null) {  isr.close();  }  if (fis != null) {  fis.close();  } } return flag; } }