java.util.zip.CheckedOutputStream getChecksum()方法

java.util.zip.CheckedOutputStream getChecksum()方法 介绍

java.util.zip.CheckedOutputStream.getChecksum() 方法返回校验该输出流。

java.util.zip.CheckedOutputStream getChecksum()方法 声明

public Checksum getChecksum()

java.util.zip.CheckedOutputStream getChecksum()方法 示例

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

在D:> test >目录下创建一个文件 Hello.txt ，内容如下：

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编写代码

package com.yiidian;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.Adler32;
import java.util.zip.CheckedOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class CheckedOutputStreamDemo {

   private static String SOURCE_FILE = "D:\\test\\Hello.txt";
   private static String TARGET_FILE = "D:\\test\\Hello.zip";

   public static void main(String[] args) {
      byte[] buffer = new byte[1024];

      try {
         FileOutputStream fout = new FileOutputStream(TARGET_FILE);
         CheckedOutputStream checksum = new CheckedOutputStream(fout, new Adler32());
         ZipOutputStream zout = new ZipOutputStream(checksum);

         FileInputStream fin = new FileInputStream(SOURCE_FILE);
         zout.putNextEntry(new ZipEntry(SOURCE_FILE));
         int length;
         while((length = fin.read(buffer)) > 0) {
            zout.write(buffer, 0, length);
         }

         zout.closeEntry();
         fin.close();
         zout.close();
         System.out.println("Zip file generated!");
         System.out.println("Adler32 Checksum is : " + checksum.getChecksum().getValue());
      } catch(IOException ioe) {
         System.out.println("IOException : " + ioe);
      }
   }
}

输出结果为：