java 寫檔案解析

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import java.io.File;   import java.io.FileOutputStream;   import java.io.*;   public class FileTest {       public FileTest() {       }       public static void main(String[] args) {           FileOutputStream out = null;           FileOutputStream outSTr = null;           BufferedOutputStream Buff=null;           FileWriter fw = null;           int count=1000;//寫檔案行數           try {               out = new FileOutputStream(new File(“C:/add.txt”));               long begin = System.currentTimeMillis();               for (int i = 0; i < count; i++) {                   out.write(“測試java 檔案操作\r\n”.getBytes());               }               out.close();               long end = System.currentTimeMillis();               System.out.println(“FileOutputStream執行耗時:” + (end - begin) + ” 豪秒”);               outSTr = new FileOutputStream(new File(“C:/add0.txt”));                Buff=new BufferedOutputStream(outSTr);               long begin0 = System.currentTimeMillis();               for (int i = 0; i < count; i++) {                   Buff.write(“測試java 檔案操作\r\n”.getBytes());               }               Buff.flush();               Buff.close();               long end0 = System.currentTimeMillis();               System.out.println(“BufferedOutputStream執行耗時:” + (end0 - begin0) + ” 豪秒”);               fw = new FileWriter(“C:/add2.txt”);               long begin3 = System.currentTimeMillis();               for (int i = 0; i < count; i++) {                   fw.write(“測試java 檔案操作\r\n”);               }                           fw.close();               long end3 = System.currentTimeMillis();               System.out.println(“FileWriter執行耗時:” + (end3 - begin3) + ” 豪秒”);           } catch (Exception e) {               e.printStackTrace();           }           finally {               try {                   fw.close();                   Buff.close();                   outSTr.close();                   out.close();               } catch (Exception e) {                   e.printStackTrace();               }           }       }   }

 

java 寫檔案解析