package cn.io; import java.io.FileWriter; import java.io.IOException; //FileWriter的初步使用 //注意:FileWriter在write()以后要关闭流,此时可能有异常需要try…catch //而且在try…catch里面可能失败于是在finally里面一定要关闭流即close() public class Test1 { public static void main(String[] args) { FileWriter fileWriter = null; try { fileWriter = new FileWriter("F:\\hao.txt"); fileWriter.write("你好"); fileWriter.write(",大家好"); fileWriter.close();// 关闭流 } catch (IOException e) { e.toString(); } finally { if (fileWriter != null) { try { fileWriter.close();// 在这里同样需要try…catch } catch (IOException e) { e.toString(); } } } } }