Spring Boot Tutorial (34) using the Redis database (2)

In addition to string types, we often store objects in Redis, and then we wonder if we can RedisTemplate<String, User> initialize and manipulate them using similar. However, spring boot does not support direct use, we need to implement the RedisSerializer<T> interface to serialize and deserialize incoming objects, and we will perform the read and write operations of the object through an instance.

• To create an object to store: User

  public class User implements Serializable {    private static final long serialversionuid = -1l;    Private String username;    Private Integer age;    Public User (String username, Integer age) {        this.username = Username;        This.age = age;    }    Omit getter and Setter}

  　　

• The
• implements the serialization interface for the object

  public class Redisobjectserializer implements Redisserializer  <Object> {private Converter<object, byte[]> serializer = new Serializingconverter ();  Private converter<byte[], object> deserializer = new Deserializingconverter ();  Static final byte[] Empty_array = new Byte[0];    Public Object deserialize (byte[] bytes) {if (IsEmpty (bytes)) {return null;    } try {return Deserializer.convert (bytes);    } catch (Exception ex) {throw new SerializationException ("Cannot deserialize", ex);    }} public byte[] Serialize (Object object) {if (object = = null) {return empty_array;    } try {return Serializer.convert (object);    } catch (Exception ex) {return empty_array;  }} Private Boolean IsEmpty (byte[] data) {return (data = = NULL | | data.length = = 0); }} 

• Configure the Redistemplate instance for user

   @Configurationpublic class Redisconfig {@Bean Jed    Isconnectionfactory jedisconnectionfactory () {return new jedisconnectionfactory (); } @Bean public redistemplate<string, user> redistemplate (Redisconnectionfactory factory) {Redistemplat        e<string, user> template = new redistemplate<string, user> ();        Template.setconnectionfactory (Jedisconnectionfactory ());        Template.setkeyserializer (New Stringredisserializer ());        Template.setvalueserializer (New Redisobjectserializer ());    return template; }} 

     

• After the configuration is completed, write the test case experiment effect

  @RunWith (Springjunit4classrunner.class) @SpringApplicationConfiguration (application.class) public class applicationtests {@Autowiredprivate redistemplate<string, user> redistemplate; @Testpublic void Test () throws Exception {//Save object User user = New User ("Superman"); Redistemplate.opsforvalue (). Set (User.getusername (), user); user = new use R ("Batman"), Redistemplate.opsforvalue (). Set (User.getusername (), user), user = new User ("Spider-Man", 40); Redistemplate.opsforvalue (). Set (User.getusername (), user); Assert.assertequals (Redistemplate.opsforvalue (). Get ("Superman"). Getage (). Longvalue ()); Assert.assertequals (Redistemplate.opsforvalue (). Get ("Batman"). Getage (). Longvalue ()); Assert.assertequals (Redistemplate.opsforvalue (). Get ("Spider-Man"). Getage (). Longvalue ());}}

  　　

  Of course the data operations provided in Spring-data-redis are much more than this, this article is only used as a configuration reference when using Redis in spring boot, and more for redis operations, refer to Spring-data-redis Reference.

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Spring Boot Tutorial (34) using the Redis database (2)