Not updated for a long time
Ten thousand words are omitted here. Hu Hansan is back again!!!! get down to business...
This time, the main function is to achieve: according to the incoming path, compress files and folders, for example, compress files from path A to directory B, including empty folders. Not much nonsense, directly on the code: (this is A tool class, idea pro test available!!)
import java.util.zip.ZipFile;
import org.apache.tools.zip.*;
import java.io.*;
/********* 1.Compress files and folders*******/
public static void zipFile(ZipOutputStream zipOutputStream, File file, String parentFileName) {
FileInputStream in = null;
try {
org.apache.tools.zip.ZipEntry zipEntry = new org.apache.tools.zip.ZipEntry(parentFileName);
// ZipEntry zipEntry = new ZipEntry(file.getName());
zipEntry.setTime(file.lastModified());
zipOutputStream.putNextEntry(zipEntry);
in = new FileInputStream(file);
int len;
byte[] buf = new byte[8 * 1024];
while ((len = in.read(buf)) != -1) {
zipOutputStream.write(buf, 0, len);
}
zipOutputStream.closeEntry();
} catch (FileNotFoundException e) {
e.printStackTrace();
}catch (Exception e){
e.printStackTrace();
}finally {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 2.Recursively compressed directory structure
*
* @param zipOutputStream
* @param file
* @param parentFileName
*/
public static void directory(org.apache.tools.zip.ZipOutputStream zipOutputStream, File file, String parentFileName) {
File[] files = file.listFiles();
String parentFileNameTemp = null;
for (File fileTemp : files) {
String fileTempName = fileTemp.getName().substring(fileTemp.getName().indexOf(".") + 1);
if(fileTempName.equals("zip")){
fileTemp.delete();
continue;
}
parentFileNameTemp = com.dy.core.sims.utils.StringUtils.isEmpty(parentFileName) ? fileTemp.getName() : parentFileName + "/" + fileTemp.getName();
if (fileTemp.isDirectory()) {
directory(zipOutputStream, fileTemp, parentFileNameTemp);
}else {
zipFile(zipOutputStream, fileTemp, parentFileNameTemp);
}
}
if(files.length==0){
try{
zipOutputStream.putNextEntry(new ZipEntry (getPath(file)+File.separator));
}catch (Exception e){
e.printStackTrace();
}
}
}
//3. Obtain the relative path of the file in the compressed package
public static String getPath (File f) {
String str1 = f.getAbsolutePath();
int n1= str1.length();
String str2 = f.getAbsolutePath();
int n2= str2.length();
String str3 = f.getName();
int n3= str3.length();
String str = str2.substring(n1-n3, n2);
return str;
}
/**
* 4.Compressed file directory
*
* @param source Source file directory (single file and multi-level directory)
* @param destit Target directory
*/
public static Boolean compressFiles(String source, String destit) {
//Determine whether the path exists
String de=destit.substring(0, destit.lastIndexOf("//")+2);
File targetFile=new File(source);
File fileTarget=new File(de);
if(!targetFile.exists() || !fileTarget.exists()){
return false;
}
File file = new File(source);
org.apache.tools.zip.ZipOutputStream zipOutputStream = null;
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(destit);
zipOutputStream = new ZipOutputStream(fileOutputStream);
if (file.isDirectory()) {
directory(zipOutputStream, file, "");
} else {
zipFile(zipOutputStream, file, "");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
zipOutputStream.close();
fileOutputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return true;
}
/**
* test
*
* @param args
*/
public static void main(String[] args) {
try{
Boolean flag=compressFiles("D://Excel//","D://Excel//aa.zip");
System.out.println(flag);
}catch (Exception e){
e.printStackTrace();
}
}