Java Inflater getTotalOut()函数及示例

Java Inflater getTotalOut()函数及示例

Inflater类getTotalOut() 函数返回到目前为止所提供的未压缩的字节数Output的总数。

函数签名

public int getTotalOut()

语法

i.getTotalOut();

参数: 该函数不需要参数

返回类型: 该函数返回int值,即未压缩的字节总数 输出。

异常: 该函数没有抛出任何异常。

例1: 使用getTotalOut()函数

// 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,
               DataFormatException
    {
  
        // compress the data
  
        // 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);
  
        // end
        d.end();
  
        // end of compression
  
        // use Inflater to get back the original data
  
        // Inflater
        Inflater i = new Inflater();
  
        // set the input for inflator
        i.setInput(output);
  
        // output bytes
        byte inflater_output[] = new byte[1024];
  
        // uncompress the data
        int org_size = i.inflate(inflater_output);
  
        // output of inflater and deflater
        System.out.println("Compressed output of deflater : "
                           + new String(output));
        System.out.println("Compressed output of Inflater : "
                           + new String(inflater_output, "UTF-8"));
  
        // get the total number of uncompressed bytes Output so far
        System.out.println("Total Output value :" + i.getTotalOut());
  
        // end
        i.end();
    }
}

输出:

Java中的Inflater getTotalOut函数及示例

注意:当输出的长度大于Integer.MAX_VALUE时就会出现问题,那么结果可能会溢出,我们应该使用getBytesRead()函数来代替。

**参考: ** https://docs.oracle.com/javase/7/docs/api/java/util/zip/Inflater.html#getTotalOut()

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