java.util.zip.InflaterInputStream mark()方法

java.util.zip.InflaterInputStream mark()方法 介绍

java.util.zip.InflaterInputStream.mark() 方法标记当前在该输入流的位置。InflaterInputStream 的标记方法什么也不做。

java.util.zip.InflaterInputStream mark()方法 声明

public void mark(int readlimit)

java.util.zip.InflaterInputStream mark()方法 参数

• readlimit ：在标记位置无效之前可以读取的最大字节数。

java.util.zip.InflaterInputStream mark()方法 返回值

• 到达底层输入流的末尾后为零，否则始终返回 1。

java.util.zip.InflaterInputStream mark()方法 示例

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

package com.yiidian;

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

public class InflaterInputStreamDemo {
   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];

      ByteArrayOutputStream buffer = new ByteArrayOutputStream();
      if(inflaterInputStream.markSupported()){
         inflaterInputStream.mark(0);  
      }
      if(inflaterInputStream.markSupported()){
         inflaterInputStream.reset();  
      }
      while(inflaterInputStream.available() != 0){
         buffer.write(inflaterInputStream.read());
      }

      inflaterInputStream.close();
      // Decode the bytes into a String
      String message1 = new String(buffer.toByteArray(),0, length,"UTF-8");
      System.out.println(message.equals(message1));
   }
}

输出结果为：