Object,byte[],ByteBuffer之间的转换。

新版本

package cn.vicky.chapt13;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
/**
* 对象序列化，反序列化（序列化对象转byte[],ByteBuffer, byte[]转object
*
* @author Vicky
* @email eclipser@163.com
*/
public class ByteUtil {
public static byte[] getBytes(Serializable obj) throws IOException {
ByteArrayOutputStream bout = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(bout);
out.writeObject(obj);
out.flush();
byte[] bytes = bout.toByteArray();
bout.close();
out.close();
return bytes;
}
public static int sizeof(Serializable obj) throws IOException {
return getBytes(obj).length;
}
public static Object getObject(byte[] bytes) throws IOException, ClassNotFoundException {
ByteArrayInputStream bi = new ByteArrayInputStream(bytes);
ObjectInputStream oi = new ObjectInputStream(bi);
Object obj = oi.readObject();
bi.close();
oi.close();
return obj;
}
public static Object getObject(ByteBuffer byteBuffer) throws ClassNotFoundException, IOException {
InputStream input = new ByteArrayInputStream(byteBuffer.array());
ObjectInputStream oi = new ObjectInputStream(input);
Object obj = oi.readObject();
input.close();
oi.close();
byteBuffer.clear();
return obj;
}
public static ByteBuffer getByteBuffer(Serializable obj) throws IOException {
byte[] bytes = ByteUtil.getBytes(obj);
ByteBuffer buff = ByteBuffer.wrap(bytes);
return buff;
}
public static void main(String[] args) throws IOException, ClassNotFoundException {
System.out.println(ByteUtil.sizeof(new Player1()));
System.out.println(ByteUtil.sizeof(new Player2()));
System.out.println(ByteUtil.sizeof(new Player3()));
System.out.println(ByteUtil.sizeof(new Player4()));
System.out.println(ByteUtil.sizeof(new Player5()));
System.out.println("---------");
Player5 p5 = new Player5();
System.out.println(ByteUtil.sizeof(p5));
p5.id1 = 100000;
p5.id2 = 200000;
System.out.println(ByteUtil.sizeof(p5));
p5.name = "ooxx";
System.out.println(ByteUtil.sizeof(p5));
p5.name = "ooxxooxx";
System.out.println(ByteUtil.sizeof(p5));
System.out.println("---------");
byte[] bytes = ByteUtil.getBytes(p5);
Player5 p5_2 = (Player5) ByteUtil.getObject(bytes);
System.out.println(p5_2.id1);
System.out.println(p5_2.id2);
System.out.println(p5_2.name);
System.out.println("---------");
System.out.println(ByteUtil.sizeof(new Player6()));
Player6 p6 = new Player6();
System.out.println(ByteUtil.sizeof(p6));
p6.id1 = 100000;
p6.id2 = 200000;
System.out.println(ByteUtil.sizeof(p6));
p6.setName("Vicky");
System.out.println(ByteUtil.sizeof(p6));
p6.setName("中文名称");
System.out.println(ByteUtil.sizeof(p6));
bytes = ByteUtil.getBytes(p6);
Player6 p6_2 = (Player6) ByteUtil.getObject(bytes);
System.out.println(p6_2.id1);
System.out.println(p6_2.id2);
System.out.println(p6_2.getName());
}
}
class Player1 implements Serializable {
int id1;
}
class Player2 extends Player1 {
int id2;
}
class Player3 implements Serializable {
int id1;
int id2;
}
class Player4 extends Player3 {
String name;
}
class Player5 implements Serializable {
int id1;
int id2;
String name;
}
class Player6 implements Serializable {
final static Charset chrarSet = Charset.forName("UTF-8");
int id1;
int id2;
private byte[] name = new byte[20];
public String getName() {
return new String(name, chrarSet);
}
public void setName(String name) {
this.name = name.getBytes(chrarSet);
}
// public void setName(String name) {
//    byte[] tmpBytes = name.getBytes(chrarSet);
//    for (int i = 0; i < tmpBytes.length; i++) {
//        this.name[i] = tmpBytes[i];
//    }
// }
}

老版本

package cn.vicky.utils; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.nio.ByteBuffer; import org.apache.mina.core.buffer.IoBuffer; /** * 对象序列化，反序列化（序列化对象转byte[],ByteBuffer, byte[]转object * * @author Vicky * @email eclipser@163.com */ public class ByteUtil { public static byte[] getBytes(Object obj) throws IOException { ByteArrayOutputStream bout = new ByteArrayOutputStream(); ObjectOutputStream out = new ObjectOutputStream(bout); out.writeObject(obj); out.flush(); byte[] bytes = bout.toByteArray(); bout.close(); out.close(); return bytes; } public static Object getObject(byte[] bytes) throws IOException, ClassNotFoundException { ByteArrayInputStream bi = new ByteArrayInputStream(bytes); ObjectInputStream oi = new ObjectInputStream(bi); Object obj = oi.readObject(); bi.close(); oi.close(); return obj; } public static Object getObject(ByteBuffer byteBuffer) throws ClassNotFoundException, IOException { // 需要mina框架的IoBuffer IoBuffer buffer = IoBuffer.allocate(byteBuffer.capacity()).setAutoExpand(true); // 自动展开 for (int i = 0; i < byteBuffer.capacity(); i++) { byteBuffer.position(i); buffer.put(byteBuffer.get()); } buffer.position(0); InputStream input = buffer.asInputStream(); ObjectInputStream oi = new ObjectInputStream(input); Object obj = oi.readObject(); input.close(); oi.close(); return obj; } public static ByteBuffer getByteBuffer(Object obj) throws IOException { byte[] bytes = ByteUtil.getBytes(obj); ByteBuffer buff = ByteBuffer.wrap(bytes); return buff; } }

以上实现了Java之间的转换，关于Java与ActionScript之间的数据传输与转换。主要思想同上暂时不予讨论。。。

Object,byte[],ByteBuffer之间的转换。相关推荐

【java】之3种方式实现Object和Map之间的转换
转载:[java]之3种方式实现Object和Map之间的转换 - 古越剑箫 - 博客园
Java的object如何转为map_java实现Object和Map之间的转换3种方式
java实现Object和Map之间的转换3种方式发布时间:2020-10-17 18:42:04 来源:脚本之家阅读:98 作者:古越剑箫利用commons.BeanUtils实现Obj和Ma ...
Java实现Object和Map之间的转换
Java实现Object和Map之间的转换 public class Obj2MapUtils {/*** 将Object类型的数据转化成Map<String,Object>* @para ...
java byte转16进制_Java 十六进制（Hex）与byte数组之间的转换
一.十六进制(Hex)与字节(byte)的概念十六进制(Hex):计算机中数据的一种表示方法,它由0-9,A-F组成,字母不区分大小写.与10进制的对应关系是:0-9对应0-9:A-F对应10-15 ...
map怎么转化dto_java实现Object和Map之间的转换3种方式
利用commons.BeanUtils实现Obj和Map之间转换,这种是最简单,也是最经常用的 public static Object mapToObject(Map map, Class> ...
InputStream，BufferedImage与byte数组之间的转换
需要获取网络的一张图片,但是某种需要,要把获取的这段流输入换为BufferedImage流,有的地方还需要转换为byte[]. 获得图片地址,获得了一个图片输入流,例如: Url img = n ...
C语言：位（bit）与字节（byte）之间的转换
1. 取出一个字节(byte)中的每一位(bit) 代码如下: uint8_t Data = 0x52;uint8_t n[8]={0};//方法1: n[0] = (Data & 0x01) ...
Javascript Object和Map之间的转换
简单的区分Map和Object Map是ES6退出的一个类型,特点:任何值都可作为属性名 Object特点:属性名只能是字符串(一开始我也不信,测试后才发现的) 代码图片创建一个map类型 new ...
C# string 和byte[]之间的转换
c#将string和byte数组之间互相转换如下方法将字符串转换为byte数组,使用System.Buffer.BlockCopy方法. static byte[] GetBytes(strin ...

Object,byte[],ByteBuffer之间的转换。

Object,byte[],ByteBuffer之间的转换。相关推荐

最新文章

热门文章