java zip 替换文件
时间: 2023-11-29 22:08:28 浏览: 48
可以使用Java中的ZipFile和ZipOutputStream类来替换一个zip文件中的某个文件。以下是一个示例代码:
```java
import java.io.*;
import java.util.zip.*;
public class ZipFileReplacement {
public static void main(String[] args) throws IOException {
String zipFilePath = "path/to/zip/file.zip";
String fileToReplace = "file/to/replace.txt";
String replacementFilePath = "path/to/replacement/file.txt";
// Open the original zip file for reading
ZipFile zipFile = new ZipFile(zipFilePath);
// Create a temporary zip file for writing
String tempFilePath = zipFilePath + ".tmp";
ZipOutputStream tempZipOutputStream = new ZipOutputStream(new FileOutputStream(tempFilePath));
// Copy all entries from original zip to temporary zip
Enumeration<? extends ZipEntry> entries = zipFile.entries();
while (entries.hasMoreElements()) {
ZipEntry entry = entries.nextElement();
InputStream inputStream = zipFile.getInputStream(entry);
tempZipOutputStream.putNextEntry(new ZipEntry(entry.getName()));
byte[] buffer = new byte[1024];
int bytesRead;
while ((bytesRead = inputStream.read(buffer)) != -1) {
tempZipOutputStream.write(buffer, 0, bytesRead);
}
tempZipOutputStream.closeEntry();
inputStream.close();
}
// Add the replacement file to the temporary zip
InputStream replacementInputStream = new FileInputStream(replacementFilePath);
tempZipOutputStream.putNextEntry(new ZipEntry(fileToReplace));
byte[] replacementBuffer = new byte[1024];
int replacementBytesRead;
while ((replacementBytesRead = replacementInputStream.read(replacementBuffer)) != -1) {
tempZipOutputStream.write(replacementBuffer, 0, replacementBytesRead);
}
tempZipOutputStream.closeEntry();
replacementInputStream.close();
// Close the temporary zip file
tempZipOutputStream.close();
// Replace the original zip file with the temporary zip file
File originalZipFile = new File(zipFilePath);
File tempZipFile = new File(tempFilePath);
originalZipFile.delete();
tempZipFile.renameTo(originalZipFile);
// Close the original zip file
zipFile.close();
}
}
```
在上面的代码中,我们首先打开原始的zip文件进行读取,并创建一个临时zip文件进行写入。然后,我们将所有原始zip文件中的条目复制到临时zip文件中。最后,我们添加要替换的文件到临时zip文件中,并将原始zip文件替换为临时zip文件。
请注意,这个代码示例只能用于替换zip文件中的一个文件。如果您需要替换多个文件,您需要在循环中添加更多的替换文件代码。
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