java.util.zip.DeflaterInputStream skip()方法

java.util.zip.DeflaterInputStream skip()方法 介绍

java.util.zip.DeflaterInputStream.skip() 方法跳过从输入流并丢弃数据。此方法可能会阻塞，直到读取并跳过指定数量的字节。注意：虽然 n 以 long 形式给出，但可以跳过的最大字节数是 Integer.MAX_VALUE。

java.util.zip.DeflaterInputStream skip()方法 声明

public long skip(long n)
   throws IOException

java.util.zip.DeflaterInputStream skip()方法 参数

• n ： 要跳过的字节数。

java.util.zip.DeflaterInputStream skip()方法 返回值

• 实际跳过的字节数。

java.util.zip.DeflaterInputStream skip()方法 示例

下面的例子展示了 java.util.zip.DeflaterInputStream.skip() 方法的用法。

package com.yiidian;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.InflaterInputStream;

public class DeflaterInputStreamDemo {
   public static void main(String[] args) throws DataFormatException, IOException {
      String message = "Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;"
         +"Welcome to Yiidian.com;";
      System.out.println("Original Message length : " + message.length());
      byte[] input = message.getBytes("UTF-8");
      int length = message.length();
      // Compress the bytes
      byte[] output = new byte[1024];
      Deflater deflater = new Deflater();
      deflater.setInput(input);
   
      deflater.finish();
      int compressedDataLength = deflater.deflate(output,0 , output.length, Deflater.NO_FLUSH);
      System.out.println("Total uncompressed bytes input :" + deflater.getTotalIn());
      System.out.println("Compressed Message Checksum :" + deflater.getAdler());     
      deflater.finished();

      System.out.println("Compressed Message length : " + compressedDataLength);
   
      ByteArrayInputStream bin = new ByteArrayInputStream(output);
      InflaterInputStream inflaterInputStream = new InflaterInputStream(bin);
      byte[] result = new byte[1024];
      System.out.println("Before Skipping, available: " + inflaterInputStream.available());
      inflaterInputStream.skip(result.length);
      System.out.println("After Skipping, available: " + inflaterInputStream.available());
      inflaterInputStream.close();     
   }
}

输出结果为：