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                ### 構造方法 ``` public?FileOutputStream(File?file) :創建文件輸出流以寫入由指定的 File對象表示的文件。 public?FileOutputStream(String?name) : 創建文件輸出流以指定的名稱寫入文件 public?FileOutputStream(File?file, boolean append) :是否追加 public?FileOutputStream(String?name, boolean append) : 是否追加 ``` ### 常用方法 ``` write(int?b) 每次可以寫出一個字節數據 write(byte[]?b) 每次可以寫出數組中的數據 write(byte[]?b,?int?off,?int?len) 每次寫出從off索引開始,len個字節 ``` ``` FileOutputStream fileOutputStream = new FileOutputStream("test.txt"); fileOutputStream.write(97); //int類型四個字節,但是只會保留一個字節的信息寫出 fileOutputStream.write("測試".getBytes()); fileOutputStream.write("abcdefg".getBytes(), 2, 2); fileOutputStream.write("\r\n".getBytes(), 2, 2); //換行 Windows : \r\n Mac和Linux : \n fileOutputStream.close(); //流操作完畢后,必須釋放系統資源,調用close方法,千萬記得 ```
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