• FileWriter字符输出

@Test
public void test3(){
    File file = new File("hello1.txt");
    FileWriter fw = null;
    try {
        //自动创建文件。默认false，覆盖写；true追加写
        fw = new FileWriter(file, true);
        fw.write("天南地北");
    } catch (IOException e) {
        e.printStackTrace();
    }finally {
        if (fw != null){
            try {
                fw.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}