java修改文件为只读权限

本文链接：https://blog.csdn.net/yaerfeng/article/details/37756043

原文：java修改文件为只读权限

代码下载地址：http://www.zuidaima.com/share/1550463260658688.htm

通过java可以修改文件为只读权限

   

package com.zuidaima.util.file;
     
    import java.io.File;
    import java.io.IOException;
     
    /**
     * 修改文件为只读权限
     *
     * @author javaniu
     *
     */
    public class MakeFileReadOnly {
        public static void main(String[] args) throws IOException {
            File file = new File("c:/file.txt");
     
            // mark this file as read only, since jdk 1.2
            file.setReadOnly();
     
            if (file.canWrite()) {
                System.out.println("This file is writable");
            } else {
                System.out.println("This file is read only");
            }
     
            // revert the operation, mark this file as writable, since jdk 1.6
            file.setWritable(true);
     
            if (file.canWrite()) {
                System.out.println("This file is writable");
            } else {
                System.out.println("This file is read only");
            }
        }
    }
      

不过,经过实际检验,上述方法虽然改变了文件的权限,但是仍然可以修改文件,然后另存为,所以上述方法并不可行!!

可靠的方法:

Runtime.getRuntime().exec("chmod 777 -R " + uploadFilePath);

uploadFilePath: 为要修改的文件路径

原文链接：https://blog.csdn.net/yaerfeng/article/details/37756043