[英]How can I read comments from a Zip file?
如何使用Java在Zip文件中讀寫注釋?
我可以這樣寫評論:
FileOutputStream fos = new FileOutputStream(output);
ZipOutputStream zos = new ZipOutputStream(fos);
zos.setComment("BMC Comment");
嘗試:
java.util.zip.ZipFile.getComment()
檢查這篇文章:
編輯 :不幸的是,現在原始鏈接不可用,這是一個Web存檔鏈接:
為了后代,這里是要點(略有格式):
private static String getZipCommentFromBuffer (byte[] buffer, int len) {
byte[] magicDirEnd = {0x50, 0x4b, 0x05, 0x06};
int buffLen = Math.min(buffer.length, len);
// Check the buffer from the end
for (int i = buffLen - magicDirEnd.length - 22; i >= 0; i--) {
boolean isMagicStart = true;
for (int k = 0; k < magicDirEnd.length; k++) {
if (buffer[i + k] != magicDirEnd[k]) {
isMagicStart = false;
break;
}
}
if (isMagicStart) {
// Magic Start found!
int commentLen = buffer[i + 20] + buffer[i + 21] * 256;
int realLen = buffLen - i - 22;
System.out.println ("ZIP comment found at buffer position "
+ (i + 22) + " with len = " + commentLen + ", good!");
if (commentLen != realLen) {
System.out.println ("WARNING! ZIP comment size mismatch: "
+ "directory says len is " + commentLen
+ ", but file ends after " + realLen + " bytes!");
}
String comment = new String (buffer, i + 22, Math.min(commentLen, realLen));
return comment;
}
}
System.out.println ("ERROR! ZIP comment NOT found!");
return null;
}
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