在创建文件之前，删除前一天的文件

Question

我正在C：驱动器文件夹abc中创建一个dat文件，如下所示，现在我的文件每天生成，现在假设如果今天生成我的文件，那么将来也会像往常一样生成它，但是当生成它时，我必须请确保删除较早的文件，因为该文件夹中的空间有限，并且每次都要进行此检查，然后才从该文件夹中删除该文件，请告知如何实现。

File file = new File(FilePath + getFileName()); //filepath is being passes through //ioc         //and filename through a method 


        if (!file.exists()) {
            file.createNewFile();
        }

FileOutputStream fileOutput = new FileOutputStream(
                file);

        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
                fileOutput));

Answer 1

为什么不使用file.delete()？

File file = new File(FilePath + getFileName()); //filepath is being passes through //ioc         //and filename through a method 

if (file.exists()) {
     file.delete(); //you might want to check if delete was successfull
}
file.createNewFile();

FileOutputStream fileOutput = new FileOutputStream(file);

BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fileOutput));