scouter.util.ZipFileUtil Maven / Gradle / Ivy

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package scouter.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

public class ZipFileUtil {
	private static final int FILE_BUFFER_SIZE = 8096;
	
	static public void sendZipFile(ZipOutputStream zos, File file) throws Exception {
		String zipFilename = file.getAbsolutePath();
		int index = zipFilename.lastIndexOf(File.separator);
		if(index >= 0){
			zipFilename = zipFilename.substring(index+1);
		}
			  
		ZipEntry zipEntry = new ZipEntry(zipFilename);
		zipEntry.setMethod(ZipEntry.DEFLATED);
		zipEntry.setSize(file.length());
		zos.putNextEntry(zipEntry);
		int readSize = 0;		
		byte[] buffer = new byte[FILE_BUFFER_SIZE];

		BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
		while (0 != (readSize = bis.read(buffer))) {
			if(-1 == readSize) break;
			zos.write(buffer, 0, readSize);
		}
		bis.close();
	}
	
	
	static public void recieveZipFile(ZipInputStream zis, String relativePath) throws Exception {
		ZipEntry zipEntry = null;
		  		  
		int readSize;			
		byte[] buffer = new byte[FILE_BUFFER_SIZE];

		while(null != (zipEntry = zis.getNextEntry())){
			File outFile = new File(relativePath + "/" + zipEntry.getName());
			
			File parentFolder = outFile.getParentFile();
			if(parentFolder.exists() == false){
				parentFolder.mkdirs();
			}
		   
			BufferedOutputStream fos = null;	
			try{
				fos = new BufferedOutputStream(new FileOutputStream(outFile));
	
				while((readSize = zis.read(buffer)) > 0){
					fos.write(buffer, 0, readSize);
				}
				fos.flush();
			}finally{
				if(fos != null){
					try { fos.close(); }catch(Exception ex){}
				}
			}
		}
	}
	
	static private int caculReadSize(int remainLength){
		if(remainLength >= FILE_BUFFER_SIZE){
			return FILE_BUFFER_SIZE;
		}
		return remainLength;
	}
}