java.util.zip.CheckedInputStream read()方法

java.util.zip.CheckedInputStream read()方法 介绍

java.util.zip.CheckedInputStream.read() 方法返回校验该输入流。

java.util.zip.CheckedInputStream read()方法 声明

public int read()
   throws IOException

返回值：读取的字节，如果到达流的末尾，则为 -1。。

java.util.zip.CheckedInputStream read()方法 示例

下面的例子展示了 java.util.zip.CheckedInputStream read() 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.*;

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

   public static void main(String[] args) {
      try {
 
         createZipFile();
 
         FileInputStream fin= new FileInputStream(TARGET_FILE);
         CheckedInputStream checksum = new CheckedInputStream(fin, new Adler32());
         while(checksum.read() >= 0){        
 
         } 

         System.out.println("Checksum: " + checksum.getChecksum().getValue());      
      } catch(IOException ioe) {
         System.out.println("IOException : " + ioe);
      }
   }
   
   private static void createZipFile() throws IOException{
      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;
      byte[] buffer = new byte[1024];
      while((length = fin.read(buffer)) > 0) {
         zout.write(buffer, 0, length);
      }

      zout.closeEntry();
      fin.close();
      zout.close();
   }
}

输出结果为：