java.util.zip.DeflaterOutputStream flush()方法

java.util.zip.DeflaterOutputStream flush()方法 介绍

java.util.zip.DeflaterOutputStream.flush() 方法刷新压缩的输出流。如果在构造此压缩输出流时 syncFlush 为真，则此方法首先使用刷新模式 Deflater.SYNC_FLUSH 刷新底层压缩器，以强制将所有待处理数据刷新到输出流，然后刷新输出流。否则，此方法仅刷新输出流而不刷新压缩器。

java.util.zip.DeflaterOutputStream flush()方法 声明

public void flush()
   throws IOException

java.util.zip.DeflaterOutputStream flush()方法 参数

• 无

java.util.zip.DeflaterOutputStream flush()方法 返回值

• 无

java.util.zip.DeflaterOutputStream flush()方法 示例

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

package com.yiidian;

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

public class DeflaterOutputStreamDemo {

   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;";
      String dictionary = "Welcome";
      System.out.println("Original Message length : " + message.length());
      byte[] input = message.getBytes("UTF-8");

      // Compress the bytes
      ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
      DeflaterOutputStream outputStream = new DeflaterOutputStream(arrayOutputStream);
      outputStream.write(input);
      outputStream.flush();
      outputStream.close();

      //Read and decompress the data
      byte[] readBuffer = new byte[5000];
      ByteArrayInputStream arrayInputStream = 
         new ByteArrayInputStream(arrayOutputStream.toByteArray());
      InflaterInputStream inputStream = new InflaterInputStream(arrayInputStream);
      int read = inputStream.read(readBuffer);

      //Should hold the original (reconstructed) data
      byte[] result = Arrays.copyOf(readBuffer, read);

      // Decode the bytes into a String
      message = new String(result, "UTF-8");
    
      System.out.println("UnCompressed Message length : " + message.length());
   }
}

输出结果为：