java.util.zip.InflaterOutputStream.finish() 方法示例

描述

java.util.zip.InflaterOutputStream.finish() 方法完成向輸出流中寫入壓縮資料，而無需關閉底層流。當對同一個輸出流連續應用多個過濾器時，可以使用此方法。

宣告

以下是 java.util.zip.InflaterOutputStream.finish() 方法的宣告。

public void finish()
   throws IOException

異常

• IOException − 如果發生 I/O 錯誤。

示例

以下示例演示了 java.util.zip.InflaterOutputStream.finish() 方法的用法。

package com.tutorialspoint;

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.InflaterOutputStream;

public class InflaterOutputStreamDemo {

   public static void main(String[] args) throws DataFormatException, IOException {
      String message = "Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;"
         +"Welcome to TutorialsPoint.com;";
      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.close();

      //Read and decompress the data
      InflaterOutputStream inflaterOutputStream = null;
      ByteArrayOutputStream decompressedOutputStream = null;
      decompressedOutputStream = new ByteArrayOutputStream();
      inflaterOutputStream = new InflaterOutputStream(decompressedOutputStream);
      inflaterOutputStream.write(arrayOutputStream.toByteArray());
      inflaterOutputStream.finish();
      inflaterOutputStream.close();

      //Should hold the original (reconstructed) data
      byte[] result = Arrays.copyOf(decompressedOutputStream.toByteArray(), 300);

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

讓我們編譯並執行上述程式，這將生成以下結果 −

Original Message length : 300
UnCompressed Message length : 300