public  long checkSpace(){
        String path = System.getProperty("user.dir");
        System.out.println("path=="+path);
        File file = new File(path);
        long freeSpace = file.getFreeSpace();
        long diskSpace = freeSpace / 1024 / 1024/1024;
        return diskSpace;
    }

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原文链接:https://blog.csdn.net/txwy12/article/details/129853700