通过protostuff实现动态proto

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>2.6.1</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>com.dyuproject.protostuff</groupId>
<artifactId>protostuff-core</artifactId>
<version>1.0.9</version>
</dependency>
<dependency>
<groupId>com.dyuproject.protostuff</groupId>
<artifactId>protostuff-api</artifactId>
<version>1.0.9</version>
</dependency>
<dependency>
<groupId>com.dyuproject.protostuff</groupId>
<artifactId>protostuff-runtime</artifactId>
<version>1.0.9</version>
</dependency>
<dependency>
<groupId>org.objenesis</groupId>
<artifactId>objenesis</artifactId>
<version>2.1</version>
</dependency>
</dependencies>

public class Student {

private String name;
private int age;

public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}

@Override
public String toString() {
return String.format("UserName:%s--UserAge:%d", name,age);
}
}

import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.objenesis.Objenesis;
import org.objenesis.ObjenesisStd;
import com.dyuproject.protostuff.LinkedBuffer;
import com.dyuproject.protostuff.ProtostuffIOUtil;
import com.dyuproject.protostuff.Schema;
import com.dyuproject.protostuff.runtime.RuntimeSchema;

public class SerializationUtil {

private SerializationUtil(){}

private static Map<Class<?>, Schema<?>> cachedSchema = new ConcurrentHashMap<Class<?>, Schema<?>>();
private static Objenesis objenesis = new ObjenesisStd(true);

private static <T> Schema<T> getSchema(Class<T> cls){
@SuppressWarnings("unchecked")
Schema<T> schema = (Schema<T>)cachedSchema.get(cls);
if(schema==null){
schema = RuntimeSchema.getSchema(cls);
cachedSchema.put(cls, schema);
}
return schema;
}

public static <T> byte[] serialize(T obj){
@SuppressWarnings("unchecked")
Class<T> cls = (Class<T>)obj.getClass();
LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
try {
Schema<T> schema = getSchema(cls);
return ProtostuffIOUtil.toByteArray(obj, schema, buffer);
} catch (Exception e) {
throw new IllegalStateException(e.getMessage(), e);
}
finally{
buffer.clear();
}
}

public static <T> T deserialize(byte[] data , Class<T> cls){
try {
T message = objenesis.newInstance(cls);
Schema<T> schema = getSchema(cls);
ProtostuffIOUtil.mergeFrom(data, message, schema);
return message;
} catch (Exception e) {
throw new IllegalStateException(e.getMessage(), e);
}

}
}