试图编写java代码来编写“.dat”文件..同时检查大小以及..每200 KB创建新的“.dat”继续写入文件。有什么办法,我能做到这一点..Java自动创建新文件取决于文件大小
当文件超过200KB,并创建新的文件名这样
1st file name.. 1_filename
2nd file name.. 2_filename
3rd file name.. 3_filename........
,或者如果文件只创建一个文件,意味着小于200KB比
Filenamd ..文件名,如代码..
我写的代码写入文件,但..其唯一的书写2个文件..这不是做正确的方式..
她e是我的代码..
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class xmlfile1filebytes {
public static void main(String[] args) throws IOException {
File folder = new File ("07072013");
File[] listOfFiles = folder.listFiles();
System.out.println("There are " + listOfFiles.length + " files");
String filesin;
String timeStamp = new SimpleDateFormat("MM-dd-yyyy[HH.mm.ss]")
.format(Calendar.getInstance().getTime());
System.out.println(timeStamp);
BufferedWriter xmlfile = null;
BufferedWriter datfile = null;
String outxmlfile = ("07072013\\" + timeStamp + ".xml");
xmlfile = new BufferedWriter(new FileWriter(outxmlfile));
String outdatfile = ("07072013\\" + timeStamp + ".dat");
datfile = new BufferedWriter(new FileWriter(outdatfile));
int offset = 0;
int size = 0;
for (int i = 0; i < listOfFiles.length; i++) {
File f = listOfFiles[i];
// System.out.println(i + " " + f.getAbsolutePath());
if (f.isFile()) {
filesin = listOfFiles[i].getName();
if (filesin.endsWith("pdf")) {
Path aPath = Paths.get(f.getAbsolutePath());
System.out.println(filesin);
byte[] actualBytes = Files.readAllBytes(aPath);
size = actualBytes.length;
xmlfile.append((i + 1) + ")" + " File = " + filesin + ", Offset = " + offset + ", Size = " + size + "\n");
offset = offset + size;
xmlfile.newLine();
String s = new String(actualBytes);
datfile.append(s);
datfile.newLine();
File datfileinfolder = new File ("07072013\\" + timeStamp + ".dat");
long datfilesize = datfileinfolder.length();
long datfilesizeinkb = datfilesize /1024;
System.out.println(datfilesizeinkb);
if (datfilesizeinkb >= 200) {
datfile.close();
BufferedWriter datfile1 = null;
String outdatfile1 = ("07072013\\" + "1_"+ timeStamp + ".dat");
datfile1 = new BufferedWriter(new FileWriter(outdatfile1));
String s1 = new String(actualBytes);
datfile1.append(s1);
datfile1.close();
}
}
}
}
xmlfile.close();
}
}
而且我得到的错误,当写文件超过400 KB ..
错误:
There are 10 files
07-09-2013[16.03.00]
1192970_eBill_20130709.pdf
96
1321470_eBill_20130709.pdf
208
1724897_eBill_20130709.pdf
Exception in thread "main" java.io.IOException: Stream closed
at java.io.BufferedWriter.ensureOpen(Unknown Source)
at java.io.BufferedWriter.write(Unknown Source)
at java.io.Writer.write(Unknown Source)
at java.io.Writer.append(Unknown Source)
at xmlfile1filebytes.main(xmlfile1filebytes.java:65)
您需要告诉我们哪一行导致异常xmlfile1filebytes.java:65。另外,我编辑了你的问题,删除了一些不必要的乞讨。 –