通用的ProtostuffSerializer for Java

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以前使用 protobuf或protostuff的時候覺得很麻煩，每個類都要單獨定製，於是封裝了一個類。

同事測試過，效能和壓縮率都很好，尤其是相比json的序列化。

需注意：只支援Pojo類（即需要有get/set方法）、對一個新的class第一次調用初始化會有一兩百毫秒的register時間，之後就很快了。

 

import io.protostuff.LinkedBuffer;import io.protostuff.ProtostuffIOUtil;import io.protostuff.Schema;import io.protostuff.runtime.RuntimeSchema;import java.io.Serializable;import java.util.Map;import java.util.concurrent.ConcurrentHashMap;/** * Protostuff serializer tool, for POJO serialization. * Protostuff is much more efficient than json, even faster than Protobuf and Avro, but the serialized string is human-unreadable. * Not support Array or Generic-type, please wrap these special objects via a POJO with empty constructors. * * @author lhfcws * @since 2016-03-16 */public class ProtostuffSerializer implements Serializable {    static Map<Class, Schema> schemaCache = new ConcurrentHashMap<>();    /**     * common protostuff serialize, object need a empty constructor     * Be careful to convert result byte[] to String, use new String(bytes, StandardCharsets.UTF_16LE).     *     * @param obj     * @param <T>     * @return     */    public static <T> byte[] serializeObject(T obj) {        Class<T> klass = (Class<T>) obj.getClass();        LinkedBuffer buffer = LinkedBuffer.allocate(4096);        if (schemaCache.containsKey(klass)) {            return ProtostuffIOUtil.toByteArray(obj, schemaCache.get(klass), buffer);        } else {            schemaCache.put(klass, RuntimeSchema.getSchema(klass));            return ProtostuffIOUtil.toByteArray(obj, schemaCache.get(klass), buffer);        }    }    /**     * common protostuff unserialize     *     * @param bs     * @param klass     * @param <T>     * @return     */    public static <T> T deserialize(byte[] bs, Class<T> klass) {        if (schemaCache.containsKey(klass)) {            Schema<T> schema = schemaCache.get(klass);            T msg = schema.newMessage();            ProtostuffIOUtil.mergeFrom(bs, msg, schema);            return msg;        } else {            Schema<T> schema = RuntimeSchema.getSchema(klass);            T msg = schema.newMessage();            schemaCache.put(klass, schema);            ProtostuffIOUtil.mergeFrom(bs, msg, schema);            return msg;        }    }}

 

使用demo：

// 如果是Pojo類直接調用就行了，非Pojo類參考如下：（假設已有一個StrParams model類）    public static class StrParamsPojo {        private StrParams p;        public StrParamsPojo() {        }        public StrParamsPojo(StrParams p) {            this.p = p;        }        public StrParams getP() {            return p;        }        public void setP(StrParams p) {            this.p = p;        }     }    public void serialize() throws IOException {        StrParams p = new StrParams();        StrParamsPojo pojo = new StrParamsPojo(p);        byte[] bs = ProtostuffSerializer.serializeObject(pojo);    }    public void deserialize(byte[] bs) throws IOException {        StrParamsPojo pojo = ProtostuffSerializer.deserialize(bs, StrParamsPojo.class);        StrParams p = pojo.getP();    }

 

附送一個FastJsonSerializer：

import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.serializer.SerializerFeature;import java.lang.reflect.Type;/** * FastJson is faster than Gson. * But DO remember your objects has get/set for the fields you want to serialze. * @author lhfcws */public class FastJsonSerializer {    /**     * 把給定的對象序列化成json字串     * @param obj 給定的對象     * @return 對象序列化後的json字串     */    public static <T> String serialize(T obj) {        return JSON.toJSONString(obj,                SerializerFeature.IgnoreNonFieldGetter,                SerializerFeature.SkipTransientField,                SerializerFeature.DisableCircularReferenceDetect,                SerializerFeature.BrowserCompatible        );    }    public static <T> String serializePretty(T obj) {        return JSON.toJSONString(obj,                SerializerFeature.IgnoreNonFieldGetter,                SerializerFeature.SkipTransientField,                SerializerFeature.DisableCircularReferenceDetect,                SerializerFeature.BrowserCompatible,                SerializerFeature.PrettyFormat        );    }    /**     * 根據類名把json字串還原序列化成實體類對象     * @param json 待還原序列化的json字串     * @param klass 還原序列化的實體類     * @return 還原序列化後的對象     */    public static <T> T deserialize(String json, Class<T> klass) {        return JSON.parseObject(json, klass);    }    /**     * 把Json字串還原序列化成實現了Type介面的實體類對象     * @param json 待還原序列化的json字串     * @param type 泛型型別     * @return 還原序列化後的對象     */    public static <T> T deserialize(String json, Type type) {        return JSON.parseObject(json, type);    }}

 

通用的ProtostuffSerializer for Java