Java Deflater getBytesWritten()函数及示例

java.util.zip中 Deflater类 的 getBytesWritten() 函数返回到目前为止提供的压缩字节总数。

函数签名

public long getBytesWritten()

语法

d.getBytesWritten();

参数： 该函数不需要参数

返回类型： 该函数返回一个Long值，即输出的压缩字节的总数。

异常： 该函数没有抛出任何异常。

例子 1 :

// Java program to describe the use
// of getBytesWritten() function
  
import java.util.zip.*;
import java.io.UnsupportedEncodingException;
  
class GFG {
    public static void main(String args[])
        throws UnsupportedEncodingException
    {
        // deflater
        Deflater d = new Deflater();
  
        // get the text
        String pattern = "GeeksforGeeks", text = "";
  
        // generate the text
        for (int i = 0; i < 4; i++)
            text += pattern;
  
        // set the Input for deflator
        d.setInput(text.getBytes("UTF-8"));
  
        // finish
        d.finish();
  
        // output bytes
        byte output[] = new byte[1024];
  
        // compress the data
        int size = d.deflate(output);
  
        // compressed String
        System.out.println("Compressed String :"
                           + new String(output)
                           + "\n Size " + size);
  
        // original String
        System.out.println("Original String :" + text
                           + "\n Size " + text.length());
  
        // get the total number of
        // compressed bytes output so far
        System.out.println("Bytes Written value :"
                           + d.getBytesWritten());
  
        // end
        d.end();
    }
}

输出

Compressed String :x?sOM?.N?/r???q??
 Size 21
Original String :GeeksforGeeksGeeksforGeeksGeeksforGeeksGeeksforGeeks
 Size 52
Bytes Written value :21

参考资料: https://docs.oracle.com/javase/7/docs/api/java/util/zip/Deflater.html#getBytesWritten()