java写脚本解决运维中备份磁盘空间不够的问题

直接上代码

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import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class BackupCheck {

public static void main(String[] args) {
	// TODO Auto-generated method stub
	
	File diskPartition = new File("E:");
	long frees=diskPartition.getFreeSpace();
	//剩余空间小于5G
	if ((frees/(1024*1024*1024))<5) {
		List<FileInfo> fs = getFiles("E:\\backup");
		for (int i=1;i<fs.size();i++) {
			fs.get(i).file.delete();
		}
		
		
	}
	
	
	
}
static public List<FileInfo> getFiles(String dir) {
	File file = new File(dir);
	File[] fileList = file.listFiles();
	List<FileInfo> fis=new ArrayList<FileInfo>();
	
	
	for (int i=0;i<fileList.length;i++) {
		String fn=fileList[i].getName();
		Long ed=fileList[i].lastModified();
		//System.out.println(fn+ed);
		if (fileList[i].isFile()) {
			FileInfo fi=new FileInfo();
			//fi.add(fileList[i]);
			fi.fn=fn;
			fi.editDate=ed;
			fi.file=fileList[i];
			fis.add(fi);
			//System.out.println(fn);
			
			
		}
		
	}
	//排序留下最新的备份
	Collections.sort(fis,new Comparator<FileInfo>() {

		@Override
		public int compare(FileInfo arg0, FileInfo arg1) {
			// TODO Auto-generated method stub
			if (arg0.editDate>arg1.editDate) {
				return -1;
			}
			return 1;
		}
		
	});
	//最新文件
	System.out.println(fis.get(0).fn);
	return fis;
}
static public class FileInfo{
	public String fn;
	public Long editDate;
	public File file;
	
}

}

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