常见的的序列化反序列方式的效率:
protoBuf(PB) > fastjson > jackson > hessian > xstream > java
数据来自于:https://github.com/eishay/jvm-serializers/wiki
所以我选择了java方式、jackson方式、fastjson方式、pb方式做了封装并测试,测试结果如下:
jackson、pb、fastjson差不太多,jackson稍好些,java方式非常慢不推荐,jackson是springboot自带的json序列化工具,所以推荐这种方式做redis对象存取。
下面是四种实现方式:
java自带序列化
序列化工具方法
/**
* 序列化
*
* @param object
* @return
*/
public static byte[] serialize(Object object) {
ObjectOutputStream oos = null;
ByteArrayOutputStream baos = null;
try {
// 序列化
baos = new ByteArrayOutputStream();
oos = new ObjectOutputStream(baos);
oos.writeObject(object);
byte[] bytes = baos.toByteArray();
return bytes;
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
} /**
* 反序列化
*
* @param bytes
* @return
*/
public static Object unserialize(byte[] bytes) {
ByteArrayInputStream bais = null;
try {
// 反序列化
bais = new ByteArrayInputStream(bytes);
ObjectInputStream ois = new ObjectInputStream(bais);
return ois.readObject();
} catch (Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
}
redisUtils
@Autowired
private StringRedisTemplate redisTemplate;
/**
* 以二进制序列化方式向redis保存对象 2019
*
* @param key
* @param value
*/
public void setObj(String key, Object value) {
final byte[] vbytes = SerializeUtil.serialize(value);
redisTemplate.execute(new RedisCallback() {
@Override
public Object doInRedis(RedisConnection connection) throws DataAccessException {
// connection.set(redisTemplateSer.getStringSerializer().serialize(key), vbytes);
connection.set(SerializeUtil.serialize(key), vbytes);
return null;
}
});
} /**
* 以二进制序列化方式从redis获取对象 2019
*
* @param key
* @param <T>
* @return
*/
public <T> T getObj(String key) {
return redisTemplate.execute(new RedisCallback<T>() {
@Override
public T doInRedis(RedisConnection connection) throws DataAccessException {
// byte[] keyByte = redisTemplateSer.getStringSerializer().serialize(key);
byte[] keyByte = SerializeUtil.serialize(key); if (connection.exists(keyByte)) {
byte[] valuebytes = connection.get(keyByte);
@SuppressWarnings("unchecked")
T value = (T) SerializeUtil.unserialize(valuebytes);
return value;
}
return null;
}
});
}
Jackson、fastjson
序列化工具方法
/**
* jackson序列化反序列化工具
*/
private static ObjectMapper objectMapper = new ObjectMapper(); public static <T> String obj2String(T obj) {
if (obj == null) {
return null;
}
try {
return obj instanceof String ? (String) obj : objectMapper.writeValueAsString(obj);
} catch (Exception e) {
e.printStackTrace();
return null;
}
} //字符串转对象
public static <T> T string2Obj(String str, Class<T> clazz) {
if (StringUtils.isEmpty(str) || clazz == null) {
return null;
}
try {
return clazz.equals(String.class) ? (T) str : objectMapper.readValue(str, clazz);
} catch (IOException e) {
e.printStackTrace();
return null;
}
} // /**
// * fastjson序列化反序列化工具
// */
// public static <T> String obj2String(T obj) {
// return JSON.toJSONString(obj);
// }
//
// //字符串转对象
// public static <T> T string2Obj(String str, Class<T> clazz) {
// return JSON.parseObject(str,clazz);
// }
redisUtils
/**
* 以JSON序列化方式向redis保存对象 推荐这种用法速度快 2019
* @param key
* @param value
*/
public void setObjJson(String key,Object value){
redisTemplate.opsForValue().set(key,SerializeUtil.obj2String(value));
} /**
* 以JSON序列化方式从redis获取对象 推荐这种用法速度快 2019
* @param key
* @param clazz
* @param <T>
* @return
*/
public <T> T getObjJson(String key,Class<T> clazz){
String strValue = redisTemplate.opsForValue().get(key);
if(!StringUtils.isEmpty(strValue)){
T value = SerializeUtil.string2Obj(strValue,clazz);
return value;
}
return null;
}
ProtoBuf方式
maven依赖
<!-- protostuff -->
<dependency>
<groupId>io.protostuff</groupId>
<artifactId>protostuff-core</artifactId>
<version>1.4.0</version>
</dependency>
<dependency>
<groupId>io.protostuff</groupId>
<artifactId>protostuff-runtime</artifactId>
<version>1.4.0</version>
</dependency>
序列化工具方法
/**
* protobuf序列化工具
*/
public static <T> byte[] serializePb(T o) {
Schema schema = RuntimeSchema.getSchema(o.getClass());
return ProtobufIOUtil.toByteArray(o, schema, LinkedBuffer.allocate(256));
} public static <T> T unserializePb(byte[] bytes, Class<T> clazz) { T obj = null;
try {
obj = clazz.newInstance();
Schema schema = RuntimeSchema.getSchema(obj.getClass());
ProtostuffIOUtil.mergeFrom(bytes, obj, schema);
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} return obj;
}
redisUtils,pb方式如果是嵌套对象会有一定问题(这块回头再研究一下),并且需要序列化的成员变量需要添加@Tag(7)注解,如:
@Data
public class SimplePojo {
@Tag(1)
private String a;
@Tag(2)
private String b;
@Tag(3)
private String c;
/**
* 以pb序列化方式向redis保存对象 2019
*
* @param key
* @param value
*/
public void setObjPb(String key, Object value) {
final byte[] vbytes = SerializeUtil.serializePb(value);
redisTemplate.execute(new RedisCallback() {
@Override
public Object doInRedis(RedisConnection connection) throws DataAccessException {
connection.set(SerializeUtil.serializePb(key), vbytes);
return null;
}
});
} /**
* 以pb序列化方式从redis获取对象 2019
*
* @param key
* @param <T>
* @return
*/
public <T> T getObjPb(String key,Class<T> clazz) {
return redisTemplate.execute(new RedisCallback<T>() {
@Override
public T doInRedis(RedisConnection connection) throws DataAccessException {
byte[] keyByte = SerializeUtil.serializePb(key); if (connection.exists(keyByte)) {
byte[] valuebytes = connection.get(keyByte);
@SuppressWarnings("unchecked")
T value = (T) SerializeUtil.unserializePb(valuebytes,clazz);
return value;
}
return null;
}
});
}
Fork From GIT
更详细的的源码详见:https://gitee.com/zxporz/redistest/blob/master/src/main/java/org/zxp/redis/utils/RedisUtil.java
欢迎fork