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compressFileUtil.java
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compressFileUtil.java
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package com.corejava.chapter1;
import static java.lang.System.*;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Scanner;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
public class compressFileUtil
{
public static void main(String[] args) throws Exception
{
compressFiles("d:" + File.separator + "srcZip" + File.separator,
"d:" + File.separator + "desZip");
out.println("successful compression !");
}
public static void compressFiles(String srcPath, String desPath) throws Exception
{
File srcfile = new File(srcPath);
FileOutputStream fos = new FileOutputStream(desPath + ".zip");
ZipOutputStream zos = new ZipOutputStream(new BufferedOutputStream(fos));
createCompressedFile(zos, srcfile, "");
zos.close();
}
public static void createCompressedFile(ZipOutputStream zos, File file, String dir) throws Exception
{
if(file.isDirectory()) //如果当前文件类型是文件夹,则进行进一步处理
{
File[] files = file.listFiles(); //得到文件列表信息
zos.putNextEntry(new ZipEntry(dir + File.separator)); //将文件夹添加到下一级打包目录
dir = dir.length() == 0 ? "" : dir + File.separator;
for (int i = 0; i < files.length; i++) //循环将文件夹中的文件打包
{
createCompressedFile(zos, files[i], dir + files[i].getName());
}
}
else //当前文件类型是文件,打包处理
{
FileInputStream fis = new FileInputStream(file); //文件输入流
zos.putNextEntry(new ZipEntry(dir));
int j = 0;
byte[] buffer = new byte[1024];
while((j = fis.read(buffer)) > 0)
{
zos.write(buffer, 0, j); // 进行写操作
}
fis.close(); //关闭输入流
}
}
}