Difference between methods of creating files in java
区别:
mkdir
和mkdirs
:mkdir只能用来创建文件夹,且只能创建一级目录;
mkdirs同样只能用来创建文件夹,可创建多级目录 ,如果上级不存在,就会自动创建。
createNewFile
:只能用来创建文件,且只能在已存在的目录下创建文件。
一般情况下配合使用,附上一段代码,会在自定义的目录下创建名为111的docx文件,将inputString字符串内容写入其中。
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示例演示如下:
import java.io.ByteArrayInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; public class Modify { public static void main(String[] args) throws IOException { String path = "F:\\Users\\yyy\\Desktop\\111.docx"; Modify modify = new Modify(); modify.create("hhh",path); } /** * * @param inputString 需写入的字符串内容 * @param path 文件创建的路径 * @throws IOException */ private void create(String inputString,String path) throws IOException { String newPath = path.substring(0,path.lastIndexOf("\\")); File file = new File(newPath); if (!file.exists()){ file.mkdirs(); } File newFile = new File(path); if (!newFile.exists()){ newFile.createNewFile(); } ByteArrayInputStream input = new ByteArrayInputStream(inputString.getBytes()); int index; byte[] bytes = new byte[1024]; FileOutputStream fs = new FileOutputStream(path); while ((index = input.read(bytes)) != -1) { fs.write(bytes, 0, index); fs.flush(); } fs.close(); input.close(); } }
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