java压缩解压文件文件夹[指点]
java压缩解压文件文件夹
用java压缩文件夹/文件
压缩文件夹代码:
import java.io.File;
import org.apache.tools.zip.ZipOutputStream; //这个包在ant.jar里,要到官方网
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipInputStream; import java.util.zip.ZipEntry;
public class CompressBook {
public CompressBook() {}
/**//*
* inputFileName 输入一个文件夹
* zipFileName 输出一个压缩文件夹
*/
public void zip(String inputFileName) throws Exception {
String zipFileName = "c:\\test.zip"; //打包后文件名字
System.out.println(zipFileName);
zip(zipFileName, new File(inputFileName));
}
private void zip(String zipFileName, File inputFile)
throws Exception {
ZipOutputStream out = new ZipOutputStream(new
FileOutputStream(zipFileName));
zip(out, inputFile, "");
System.out.println("zip done");
out.close();
}
private void zip(ZipOutputStream out, File f, String base)
throws Exception {
if (f.isDirectory()) {
File[] fl = f.listFiles();
out.putNextEntry(new
org.apache.tools.zip.ZipEntry(base + "/"));
base = base.length() == 0 ? "" : base + "/";
for (int i = 0; i < fl.length; i++) {
zip(out, fl[i], base + fl[i].getName());
}
}else {
out.putNextEntry(new
org.apache.tools.zip.ZipEntry(base));
FileInputStream in = new FileInputStream(f);
int b;
System.out.println(base);
while ( (b = in.read()) != -1) {
out.write(b);
}
in.close();
}
}
public static void main(String [] temp){
CompressBook book = new CompressBook();
try {
book.zip("c:\\c");//你要压缩的文件夹
}catch (Exception ex) {
ex.printStackTrace();
}
}
}
压缩文件代码:
import java.io.*;
import java.util.zip.*;//ZipOutputStream这个流在这里
import java.util.*;
public class ZipOutputStreamTest
{
public static void main(String[] args) throws Exception
{
File f = new File("a.jpg");
FileInputStream fis = new FileInputStream(f);
BufferedInputStream bis = new BufferedInputStream(fis);
byte[] buf = new byte[1024];
int len;
FileOutputStream fos = new
FileOutputStream(f.getName()+".zip");
BufferedOutputStream bos = new
BufferedOutputStream(fos);
ZipOutputStream zos = new ZipOutputStream(bos);//压缩包
ZipEntry ze = new ZipEntry(f.getName());//这是压缩包名里的文件名
zos.putNextEntry(ze);//写入新的 ZIP 文件条目并将流定位到条目数据的开始处
while((len=bis.read(buf))!=-1)
{
zos.write(buf,0,len);
zos.flush();
}
bis.close();
zos.close();
}
}
用java解压文件夹
import java.io.File;
import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;
/** *//**
* 使用java核心类库打包、解包zip文件,不足之处在于压缩中文名的文件时,在压缩包内中文字符是乱码,
* 在windows下解压后编码正常显示中文,而其他系统下则不能正常还原;
*/
public class TestZip {
/** *//**
* 定义解压缩zip文件的
* @param zipFileName
* @param outputDirectory
*/
public void unzip(String zipFileName, String
outputDirectory) {
try {
ZipInputStream in = new ZipInputStream(new
FileInputStream(zipFileName));
//获取ZipInputStream中的ZipEntry条目,一个zip文件中可能包含多个ZipEntry,
//当getNextEntry方法的返回值为null,则代
ZipInputStream中没有下一个ZipEntry,
//输入流读取完成;
ZipEntry z = in.getNextEntry();
while (z != null) {
System.out.println("unziping " +
z.getName());
//创建以zip包文件名为目录名的根目录
File f = new File(outputDirectory);
f.mkdir();
if (z.isDirectory()) {
String name = z.getName();
name = name.substring(0, name.length() - 1);
System.out.println("name " + name);
f = new File(outputDirectory + File.separator + name);
f.mkdir();
System.out.println("mkdir " + outputDirectory + File.separator + name);
}
else {
f = new File(outputDirectory + File.separator + z.getName());
f.createNewFile();
FileOutputStream out = new FileOutputStream(f);
int b;
while ((b = in.read()) != -1) {
out.write(b);
}
out.close();
}
//读取下一个ZipEntry
z = in.getNextEntry();
}
in.close();
}
catch (Exception e) {
// TODO 自动生成 catch 块
e.printStackTrace();
}
}
public static void main(String[] args) throws Exception{
TestZip t = new TestZip();
t.unzip("c:/a.zip", "c:/b");
//解压C盘下的a.zip文件放到C盘下的b文件夹里
//一定要注意a.zip文件要经java程序压缩出来的文件,这个程序才可以解压
}
}