Java 压缩/解压本地字节流文件 ，Flex 解压缩本地字节流文件方式例子

Java 压缩..........

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.zip.Deflater;
import java.util.zip.Inflater;

import flex.messaging.io.SerializationContext;
import flex.messaging.io.amf.Amf3Output;

public class Test {

/**
* @param args
*/
public static void main(String[] args) {
SerializationContext serializationContext = new SerializationContext();
Amf3Output amfOut = new Amf3Output(serializationContext);
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
DataOutputStream dataOutStream = new DataOutputStream(outStream);
amfOut.setOutputStream(dataOutStream);

HashMap<String, Object> map = new HashMap<String, Object>();
//        Double[] arr = new Double[10000];
//        for (int index = 0; index < 10000; index++) {
//            arr[index] = Math.random();
//        }
//        map.put("arr", arr);
map.put("name", "weni");
map.put("ad", "27");
map.put("cc", "12");
map.put("bb", "33");
map.put("ee", "44");
try {
amfOut.writeObject(map);
dataOutStream.flush();
} catch (IOException e) {
e.printStackTrace();
}

byte[] messageBytes = outStream.toByteArray();

try {
FileOutputStream os;
os = new FileOutputStream("C://test.bin");
messageBytes = compressBytes(messageBytes); // 将数据进行压缩
os.write(messageBytes);
os.flush();
os.close();
System.out.println("OK");
} catch (Exception e) {
System.out.println("error  :" + e);
}
}

private static int cachesize = 1024;
private static Deflater compresser = new Deflater();

public static byte[] compressBytes(byte input[]) {
compresser.reset();
compresser.setInput(input);
compresser.finish();
byte output[] = new byte[0];
ByteArrayOutputStream o = new ByteArrayOutputStream(input.length);
try {
byte[] buf = new byte[cachesize];
int got;
while (!compresser.finished()) {
got = compresser.deflate(buf);
o.write(buf, 0, got);
}
output = o.toByteArray();
} finally {
try {
o.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return output;
}

}

Java 解压..........

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.zip.Inflater;

import flex.messaging.io.SerializationContext;
import flex.messaging.io.amf.ASObject;
import flex.messaging.io.amf.Amf3Input;

public class Test2 {

/**
* @param args
*/
public static void main(String[] args) {
SerializationContext serializationContext = new SerializationContext();
Amf3Input amfInput = new Amf3Input(serializationContext);
ByteArrayInputStream inputStream ;
ASObject asObj=new ASObject();
try {
inputStream= new ByteArrayInputStream(decompressBytes(readFile("C:\\test.bin")));
amfInput.setInputStream(inputStream);
asObj=(ASObject) amfInput.readObject();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.print("ASObject's size is   "+asObj.size());
}
public static byte[] readFile(String filename) throws IOException{

File file =new File(filename);
if(filename==null || filename.equals(""))
{
throw new NullPointerException("无效的文件路径");
}
long len = file.length();
byte[] bytes = new byte[(int)len];

BufferedInputStream bufferedInputStream=new BufferedInputStream(new FileInputStream(file));
int r = bufferedInputStream.read( bytes );
if (r != len)
throw new IOException("读取文件不正确");
bufferedInputStream.close();

return bytes;

}
private static int cachesize = 1024;
private static Inflater decompresser = new Inflater();
public static byte[] decompressBytes(byte input[]) {
byte output[] = new byte[0];
decompresser.reset();
decompresser.setInput(input);
ByteArrayOutputStream o = new ByteArrayOutputStream(input.length);
try {
byte[] buf = new byte[cachesize];

int got;
while (!decompresser.finished()) {
got = decompresser.inflate(buf);
o.write(buf, 0, got);
}
output = o.toByteArray();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
o.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return output;
}
}

Flex 解压....
package {
import flash.display.Sprite;
import flash.events.Event;
import flash.net.URLLoader;
import flash.net.URLLoaderDataFormat;
import flash.net.URLRequest;
import flash.utils.ByteArray;

public class AMF3Test extends Sprite
{
private var loader:URLLoader;
public function AMF3Test()
{
loader=new URLLoader();
loader.load(new URLRequest("C://test.bin"));
loader.addEventListener(Event.COMPLETE,onComplete);
loader.dataFormat=URLLoaderDataFormat.BINARY;
}

private function onComplete(evt:Event):void
{
var byte:ByteArray=loader.data as ByteArray;
byte.uncompress() //将数据进行解压缩
var obj:Object=byte.readObject();
}
} 
}