java.util.zip.GZIPInputStream read()方法
java.util.zip.GZIPInputStream read()方法 介绍
java.util.zip.GZIPInputStream.read(byte[] buf, int off, int len) 方法读取未压缩的数据到字节数组。如果 len 不为零,则该方法将阻塞,直到可以解压缩某些输入;否则,不读取任何字节并返回 0。
java.util.zip.GZIPInputStream read()方法 声明
public int read(byte[] buf, int off, int len)
throws IOException
java.util.zip.GZIPInputStream read()方法 参数
-
buf : 读取数据的缓冲区。
-
off : 目标数组 b 中的起始偏移量。
-
len : 读取的最大字节数。
java.util.zip.GZIPInputStream read()方法 返回值
- 读取的实际字节数,如果到达流的末尾,则为 -1。
java.util.zip.GZIPInputStream read()方法 示例
下面的例子展示了 java.util.zip.GZIPInputStream.read(byte[] buf, int off, int len) 方法的用法。
package com.yiidian;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.zip.DataFormatException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
public class GZIPInputStreamDemo {
public static void main(String[] args) throws DataFormatException, IOException {
String message = "Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;"
+"Welcome to Yiidian.com;";
System.out.println("Original Message length : " + message.length());
byte[] input = message.getBytes("UTF-8");
// Compress the bytes
ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
GZIPOutputStream outputStream = new GZIPOutputStream(arrayOutputStream);
outputStream.write(input);
outputStream.close();
//Read and decompress the data
byte[] readBuffer = new byte[5000];
ByteArrayInputStream arrayInputStream =
new ByteArrayInputStream(arrayOutputStream.toByteArray());
GZIPInputStream inputStream = new GZIPInputStream(arrayInputStream);
int read = inputStream.read(readBuffer,0,readBuffer.length);
inputStream.close();
//Should hold the original (reconstructed) data
byte[] result = Arrays.copyOf(readBuffer, read);
// Decode the bytes into a String
message = new String(result, "UTF-8");
System.out.println("UnCompressed Message length : " + message.length());
}
}
输出结果为:
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