java.util.zip.DeflaterOutputStream.flush()方法刷新压缩的输出流。 如果构造此压缩输出流时syncFlush为true，则此方法首先使用冲洗模式Deflater.SYNC_FLUSH刷新下层压缩器，以强制将所有待处理数据刷新到输出流，然后刷新输出流。 否则，此方法仅刷新输出流而不冲洗压缩器。
声明
以下是java.util.zip.DeflaterOutputStream.flush()方法的声明。
public void flush()
throws IOException
异常
IOException- 如果发生I/O错误。
示例
以下示例显示了java.util.zip.DeflaterOutputStream.flush()方法的用法。
package com.zaixian;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import java.util.zip.Adler32;
import java.util.zip.CheckedInputStream;
import java.util.zip.DataFormatException;
import java.util.zip.Deflater;
import java.util.zip.DeflaterInputStream;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.Inflater;
import java.util.zip.InflaterInputStream;
public class DeflaterOutputStreamDemo {
public static void main(String[] args) throws DataFormatException, IOException {
String message = "Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;"
+"Welcome to xuhuhu.com;";
String dictionary = "Welcome";
System.out.println("Original Message length : " + message.length());
byte[] input = message.getBytes("UTF-8");
// Compress the bytes
ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
DeflaterOutputStream outputStream = new DeflaterOutputStream(arrayOutputStream);
outputStream.write(input);
outputStream.flush();
outputStream.close();
//Read and decompress the data
byte[] readBuffer = new byte[5000];
ByteArrayInputStream arrayInputStream =
new ByteArrayInputStream(arrayOutputStream.toByteArray());
InflaterInputStream inputStream = new InflaterInputStream(arrayInputStream);
int read = inputStream.read(readBuffer);
//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());
}
}
执行上面示例代码，得到以下结果 -
Original Message length : 300
UnCompressed Message length : 300