/ * (1)判断e盘下是否有文件夹mytemp,如果没有就创建 * (2)在mytemp文件夹下创建文件hello.txt * (3)如果该文件已存在,提示已存在,就不要再重复创建了 * (4)在文件中写入hello,world~ */ public class HomeWork01 { public static void main(String[] args) throws IOException { String directoryPath = "e:\\mytemp"; File file = new File(directoryPath); if (!file.exists()){ //创建文件夹 if (file.mkdirs()){ System.out.println("创建" + directoryPath + "成功"); } else { System.out.println("创建" + directoryPath + "失败"); } } String filePath = directoryPath + "\\hello.txt"; File file2 = new File(filePath); if (file2.exists()){ System.out.println("该文件已存在,不能重复创建"); } else { //创建文件 if (file2.createNewFile()){ System.out.println("文件创建成功"); //写入内容 BufferedWriter writer = new BufferedWriter(new FileWriter(filePath)); writer.write("hello,world~ 编程快乐"); writer.close(); } else { System.out.println("文件创建失败"); } } } }
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