Java中的 Deflater getTotalOut()函数及示例
Java .util.zip中Deflater 类的getTotalOut()函数返回迄今为止提供的压缩字节Output 的总数。
函数签名:
public int getTotalOut()
句法:
d.getTotalOut();
参数:该函数不需要参数
返回类型:该函数返回一个int 值,它是输出压缩字节的总数。
异常:函数没有抛出任何异常
示例 1:
// Java program to describe the use
// of getTotalOut() 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("Total Output value :"
+ d.getTotalOut());
// end
d.end();
}
}
输出:
Compressed String :x?sOM?.N?/r???q??
Size 21
Original String :GeeksforGeeksGeeksforGeeksGeeksforGeeksGeeksforGeeks
Size 52
Total Output value :21
注意:当输入的长度大于Integer.MAX_VALUE时会出现问题。那么结果可能会溢出,我们应该使用 getBytesRead()函数来代替
参考: https: Java/util/zip/Deflater.html#getTotalOut()