首页 > 技术文章 > 文件压缩

tobiasy 2018-01-10 14:31 原文

package com.xfm.utils;

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

/**
* 文件压缩
* @author xfm
*/
public class ZipCompress {
public static void main(String[] args) {
ZipCompress zipCom = new ZipCompress("E:\\tobiasy_decompiler_v2.4.0_SNAPSHOT.zip", "E:\\tobiasy_decompiler_v2.4.0_SNAPSHOT");
try {
zipCom.zip();
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 目的地Zip文件
*/
private String zipFileName;
/**
* 源文件(带压缩的文件或文件夹)
*/
private String sourceFileName;

public ZipCompress(String zipFileName, String sourceFileName) {
this.zipFileName = zipFileName;
this.sourceFileName = sourceFileName;
}

public void zip() throws Exception {
//File zipFile = new File(zipFileName);
System.out.println("压缩中...");

//创建zip输出流
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));

//创建缓冲输出流
BufferedOutputStream bos = new BufferedOutputStream(out);

File sourceFile = new File(sourceFileName);

//调用函数
compress(out, bos, sourceFile, sourceFile.getName());

bos.close();
out.close();
System.out.println("压缩完成");

}

public void compress(ZipOutputStream out, BufferedOutputStream bos, File sourceFile, String base) throws Exception {
//如果路径为目录(文件夹)
if (sourceFile.isDirectory()) {

//取出文件夹中的文件(或子文件夹)
File[] flist = sourceFile.listFiles();
/**
* 如果文件夹为空,则只需在目的地zip文件中写入一个目录进入点
*/
if (flist.length == 0)
{
System.out.println(base + "/");
out.putNextEntry(new ZipEntry(base + "/"));
} else
//如果文件夹不为空,则递归调用compress,文件夹中的每一个文件(或文件夹)进行压缩
{
for (int i = 0; i < flist.length; i++) {
compress(out, bos, flist[i], base + "/" + flist[i].getName());
}
}
} else
//如果不是目录(文件夹),即为文件,则先写入目录进入点,之后将文件写入zip文件中
{
out.putNextEntry(new ZipEntry(base));
FileInputStream fos = new FileInputStream(sourceFile);
BufferedInputStream bis = new BufferedInputStream(fos);

int tag;
System.out.println(base);
//将源文件写入到zip文件中
while ((tag = bis.read()) != -1) {
bos.write(tag);
}
bis.close();
fos.close();

}
}
}

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