java.util.zip.ZipOutputStream.write() 方法
描述
java.util.zip.ZipOutputStream.write(byte[] buf, int off, int len) 方法将字节数组写入当前 ZIP 条目数据。 此方法将阻塞,直到写入所有字节。
声明
以下是 java.util.zip.ZipOutputStream.write(byte[] buf, int off, int len) 方法的声明。
public void write(byte[] buf, int off, int len) throws IOException
参数
buf − 要写入数据的缓冲区。
off − 目标数组 b 中的起始偏移量。
len − 要写入的字节数。
异常
ZipException − 如果发生 ZIP 文件错误。
IOException − 如果发生 I/O 错误。
前提条件
在 D:> test > 目录中创建一个 Hello.txt 文件,内容如下。
This is an example.
示例
下面的例子展示了 java.util.zip.ZipOutputStream.write(byte[] buf, int off, int len) 方法的使用。
package com.tutorialspoint; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.Date; import java.util.zip.Adler32; import java.util.zip.CheckedOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import java.util.zip.ZipOutputStream; public class ZipOutputStreamDemo { private static String SOURCE_FILE = "D:\\test\\Hello.txt"; private static String TARGET_FILE = "D:\\test\\Hello.zip"; public static void main(String[] args) { try { createZipFile(); readZipFile(); } catch(IOException ioe) { System.out.println("IOException : " + ioe); } } private static void createZipFile() throws IOException{ FileOutputStream fout = new FileOutputStream(TARGET_FILE); CheckedOutputStream checksum = new CheckedOutputStream(fout, new Adler32()); ZipOutputStream zout = new ZipOutputStream(checksum); FileInputStream fin = new FileInputStream(SOURCE_FILE); ZipEntry zipEntry = new ZipEntry(SOURCE_FILE); zout.putNextEntry(zipEntry); int length; byte[] buffer = new byte[1024]; while((length = fin.read(buffer)) > 0) { zout.write(buffer, 0, length); } zout.closeEntry(); zout.finish(); fin.close(); zout.close(); } private static void readZipFile() throws IOException{ ZipInputStream zin = new ZipInputStream(new FileInputStream(TARGET_FILE)); ZipEntry entry; while((entry = zin.getNextEntry())!=null){ System.out.printf("File: %s Modified on %TD %n", entry.getName(), new Date(entry.getTime())); extractFile(entry, zin); System.out.printf("Zip file %s extracted successfully.", SOURCE_FILE); zin.closeEntry(); } zin.close(); } private static void extractFile(final ZipEntry entry, ZipInputStream is) throws IOException { FileOutputStream fos = null; try { fos = new FileOutputStream(entry.getName()); while(is.available() != 0){ fos.write(is.read()); } } catch (IOException ioex) { fos.close(); } } }
让我们编译并运行上面的程序,这将产生下面的结果 −
Zip File: D:\test\Hello.zip, Contains 1 file(s). File: D:\test\Hello.txt Size 1026 Modified on 05/22/17 Zip file D:\test\Hello.txt extracted successfully.
❮ java.util.zip - ZipOutputStream 类