Java Inflater setInput()函数及示例

Inflater类 的 setInput() 函数用于设置解压的输入数据。当needsInput()返回true表示输入缓冲区为空时，应调用该函数。

函数签名

public void setInput(byte[] b)
public void setInput(byte[] b, int offset, int len)

语法

i.setInput(byte[]);
i.setInput(byte[], int, int);

参数： 这些重载函数所接受的各种参数是。

byte[] b : 这是要被膨胀的输入数组。
int offset : 这是在给定数组中读取数值的起始偏移量。
int length : 这是从起始偏移量开始要压缩的最大长度。

返回类型： 该函数没有返回值

异常： 该函数没有抛出任何异常。

例1： 使用setInput(byte[] b)函数

// Java program to describe the use
// of setInput(byte[] b) 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"));
  
        // end
        i.end();
    }
}

输出：

Java中的Inflater setInput函数及示例

例2： 使用setInput(byte[] b, int offset, int len)函数

// Java program to describe the use
// of setInput(byte[] b, int offset, int len) 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 the compression
  
        // use Inflater to get back the original data
  
        // Inflater
        Inflater i = new Inflater();
  
        // set the input for inflator
        i.setInput(output, 0, 14);
  
        // 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"));
  
        // end
        i.end();
    }
}

输出：

Java中的Inflater setInput函数及示例