protobuf是谷歌推出的与语言无关、平台无关的通信协议，一个对象经过protobuf序列化后将变成二进制格式的数据，所以他可读性差，但换来的是占用空间小，速度快。居网友测试，它的序列化效率是xml的10倍以上。protostuff是java的实现版本。
protostuff在项目中的使用：
maven依赖：
<dependency>
<groupId>io.protostuff</groupId>
<artifactId>protostuff-api</artifactId>
<version>1.5.1</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
<exclusion>
<artifactId>log4j</artifactId>
<groupId>log4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.protostuff</groupId>
<artifactId>protostuff-collectionschema</artifactId>
<version>1.5.1</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
<exclusion>
<artifactId>log4j</artifactId>
<groupId>log4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.protostuff</groupId>
<artifactId>protostuff-runtime</artifactId>
<version>1.5.1</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
<exclusion>
<artifactId>log4j</artifactId>
<groupId>log4j</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>io.protostuff</groupId>
<artifactId>protostuff-core</artifactId>
<version>1.3.5</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<artifactId>commons-logging</artifactId>
<groupId>commons-logging</groupId>
</exclusion>
<exclusion>
<artifactId>log4j</artifactId>
<groupId>log4j</groupId>
</exclusion>
</exclusions>
</dependency>
工具类：
public class ProtostuffUtil {
private static Map<Class<?>, Schema<?>> cachedSchema = new ConcurrentHashMap<Class<?>, Schema<?>>();
private static <T> Schema<T> getSchema(Class<T> clazz) {
Schema<T> schema = (Schema<T>) cachedSchema.get(clazz);
if (schema == null) {
schema = RuntimeSchema.getSchema(clazz);
if (schema != null) {
cachedSchema.put(clazz, schema);
}
}
return schema;
}
/**
* 序列化
*
* @param obj 序列化对象
* @return 序列化后的byte[]值
*/
public static <T> byte[] serializer(T obj) {
@SuppressWarnings("unchecked")
Class<T> clazz = (Class<T>) obj.getClass();
LinkedBuffer buffer = LinkedBuffer.allocate(LinkedBuffer.DEFAULT_BUFFER_SIZE);
try {
Schema<T> schema = getSchema(clazz);
return ProtostuffIOUtil.toByteArray(obj, schema, buffer);
} catch (Exception e) {
throw new IllegalStateException(e.getMessage(), e);
} finally {
buffer.clear();
}
}
/**
* 反序列化
*
* @param data 序列化后的byte[]值
* @param clazz 反序列化后的对象
* @return 返回的对象
*/
public static <T> T deserializer(byte[] data, Class<T> clazz) {
try {
T obj = clazz.newInstance();
Schema<T> schema = getSchema(clazz);
ProtostuffIOUtil.mergeFrom(data, obj, schema);
return obj;
} catch (Exception e) {
throw new IllegalStateException(e.getMessage(), e);
}
}
}参考文档：