我正在使用 NetBeans 将数据导出到 Java 应用程序中的文件中.该文件将具有我在代码中给出的硬编码名称.请在下面找到代码.
I am exporting data into a file in a Java application using NetBeans. The file will have a hard coded name given by me in the code. Please find below the code.
private static String FILE = "D:\Report.pdf";
我想将日期和时间戳附加到生成的文件名中,以便创建的每个文件都是唯一的文件.如何做到这一点?
I want to append date and time stamp to the file name generated so that each file created is a unique file. How to achieve this?
使用 SimpleDateFormat
并拆分以保留文件扩展名:
Use SimpleDateFormat
and split to keep file extension:
private static String FILE = "D:Report.pdf";
DateFormat df = new SimpleDateFormat("yyyyMMddhhmmss"); // add S if you need milliseconds
String filename = FILE.split(".")[0] + df.format(new Date()) + FILE.split(".")[1];
// filename = "D:Report20150915152301.pdf"
更新:
如果您能够修改 FILE
变量,我的建议是:
private static String FILE_PATH = "D:Report";
private static String FILE_EXTENSION = ".pdf";
DateFormat df = new SimpleDateFormat("yyyyMMddhhmmss"); // add S if you need milliseconds
String filename = FILE_PATH + df.format(new Date()) + "." + FILE_EXTENSION;
// filename = "D:Report20150915152301.pdf"
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