FileUtils工具类

导入第三方jar：commons-io

?

1 2 3 4 5 6 7 8 9 10 11 12

@Test     public void test7() throws IOException {         File srcFile = new File("hello.txt");         File destFile = new File("hello2.txt");         //FileUtils.copyFile(srcFile,destFile);//复制文件           String data = FileUtils.readFileToString(srcFile, "UTF-8");//读文件         System.out.println(data);           FileUtils.writeStringToFile(destFile,"你好333","UTF-8",true);//写文件，文件不存在时会自动创建     }