java.util.zip.CRC32.getValue()方法返回校验和值。
声明
以下是java.util.zip.CRC32.getValue方法的声明。
public long getValue()
返回值
当前的校验和值。
在D:test>目录下用以下内容创建一个文件Hello.txt。
This is an example.
示例
以下示例显示了java.util.zip.CRC32.getValue()方法的用法。
package com.yiibai; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.CRC32; import java.util.zip.CheckedOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; public class CRC32Demo { 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 CRC32()); 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("CRC32 Checksum is : " + checksum.getChecksum().getValue()); } catch(IOException ioe) { System.out.println("IOException : " + ioe); } } }
执行上面示例代码，得到以下结果 –
Zip file generated! CRC32 Checksum is : 3847524486
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