已创建java文件,但仍引发异常
我正在尝试创建文件并将其添加到该目录中。下面是我的代码,我可以创建并向其中添加文件,但最后它给我带来了一个异常。 我的代码:
解压主文件。java
import java.io.File;
public class UnZip_Main {
public static void main(String[] args) {
String zipFilePath = "D:\\News\\Zip\\";
String destDirectory = "D:\\News\\Zip\\Result\\";
new File(destDirectory).mkdir();
UnZip unzipper = new UnZip();
File dir = new File(zipFilePath);
File[] files = dir.listFiles();
if (null != files) {
for (int fileIntList = 0; fileIntList < files.length; fileIntList++) {
String ss = files[fileIntList].toString();
if (null != ss && ss.length() > 0) {
System.out.println("unzip path is ");
try {
System.out.println("dest directry is " + destDirectory);
unzipper.unzip(zipFilePath + ss.substring(ss.lastIndexOf("\\") + 1, ss.length()),
destDirectory);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
}
}
解压缩。java
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class UnZip {
private static final int BUFFER_SIZE = 4096;
public void unzip(String zipFilePath, String destDirectory) throws IOException {
File destDir = new File(destDirectory);
if (!destDir.exists()) {
destDir.mkdir();
}
ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath));
ZipEntry entry = zipIn.getNextEntry();
while (entry != null) {
String filePath = destDirectory + File.separator + entry.getName();
if (!entry.isDirectory()) {
// if the entry is a file, extracts it
extractFile(zipIn, filePath, zipFilePath);
} else {
// if the entry is a directory, make the directory
File dir = new File(filePath);
dir.mkdir();
}
zipIn.closeEntry();
entry = zipIn.getNextEntry();
}
zipIn.close();
}
private void extractFile(ZipInputStream zipIn, String filePath, String zipFilePath) throws IOException {
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath, true));
byte[] bytesIn = new byte[BUFFER_SIZE];
int read = 0;
while ((read = zipIn.read(bytesIn)) != -1) {
bos.write(bytesIn, 0, read);
}
bos.close();
File newName = new File(filePath);
String str = zipFilePath.substring(zipFilePath.lastIndexOf("\\") + 1, zipFilePath.lastIndexOf("."));
File zipPath = new File(filePath);
zipPath.mkdir();
File oldName = new File(zipPath.getParent() + "\\" + str + ".xml");
if (oldName.exists()) {
oldName.delete();
}
System.out.println("new name is " + newName + "and old name is " + oldName);
if (newName.renameTo(oldName)) {
System.out.println("Renamed");
} else {
System.out.println("Not Renamed");
}
}
}
我的输出:
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\If16c0c30613111e5850ddea403ecf0ba.xml
Renamed
unzip path is
dest directry is D:\News\Zip\Result\
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\If83120c05dd311e599a896be76e2f024.xml
Renamed
unzip path is
dest directry is D:\News\Zip\Result\
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\If8915610629d11e5b64da6abc0693b3d.xml
Renamed
unzip path is
dest directry is D:\News\Zip\Result\
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\If93445c0661f11e5839c9a236dd16599.xml
Renamed
unzip path is
dest directry is D:\News\Zip\Result\
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\If9bd10a061f411e5b445d6756f17230b.xml
Renamed
unzip path is
dest directry is D:\News\Zip\Result\
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\Ife581970612c11e5b64da6abc0693b3d.xml
Renamed
unzip path is
dest directry is D:\News\Zip\Result\
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\Ifed1c1f05f9a11e5bc448d3219668f6c.xml
Renamed
unzip path is
dest directry is D:\News\Zip\Result\
new name is D:\News\Zip\Result\content.xmland old name is D:\News\Zip\Result\Iff5aa9905d4011e5bb1df062954439f5.xml
Renamed
结尾处的异常:
java.io.FileNotFoundException: D:\News\Zip\Result (Access is denied)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at UnZip.unzip(UnZip.java:17)
at UnZip_Main.main(UnZip_Main.java:19)
这些文件都是在正确的文件夹中创建的,所有这些文件都已创建,但仍然出现此异常,无法知道哪里出错以及如何修复
观察到的另一件事是,如果我将String destDirectory = "D:\\News\\Zip\\Result\\";
更改为String destDirectory = "D:\\News\\Zip\\";
,并且如果Zip
路径中有任何文件夹,我将得到与上述相同的异常结果,否则它不会引发任何异常
# 1 楼答案
无法将目录作为文件打开。您的
FileInputStream
正试图打开D:\\News\\Zip\\Result\\
目录# 2 楼答案
此行导致异常:
因为您给它一个目录(D:\News\Zip\Result)
请确保为其提供的是文件路径,而不是目录路径
尝试设置一个断点进行检查
Get FileNotFoundException when initialising FileInputStream with File object
# 3 楼答案
像这样添加一个检查
如果(文件[fileIntList].isDirectory()) 继续
此外,你应该改变你的文件重命名代码,它应该是
oldName。重命名为(新名称)
理想情况下,您应该删除新文件(destDirectory)。mkdir()