Redis是一種nosql數據庫，在開發中常用做緩存。Jedis是Redis在Java中的redis- client.在此之前，希望已經了解redis的基本使用和Maven的使用。建立Maven Project之后，在POM.xml中添加jedis和spring-data-redis的依賴如下：

<dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.0.0</version> <type>jar</type> <scope>compile</scope> </dependency> <!-- spring-redis --> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.0.0.RELEASE</version> </dependency> Redis連接數據庫參數如下：applicationContext-redis.properties

#redis config redis.pool.maxActive=100 redis.pool.maxIdle=20 redis.pool.maxWait=1000 redis.pool.testOnBorrow=true redis.hostname=localhost redis.port=6379 redis.password= 在上下文配置中使用key-value讀取方式讀取properties中的值：

<!-- Jedis 連接池配置--> <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxActive" value="${redis.pool.maxActive}" /> <property name="maxIdle" value="${redis.pool.maxIdle}" /> <property name="maxWait" value="${redis.pool.maxWait}" /> <property name="testOnBorrow" value="${redis.pool.testOnBorrow}" /> </bean> <!-- Jedis ConnectionFactory 數據庫連接配置--> <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> <property name="hostName" value="${redis.hostname}" /> <property name="port" value="${redis.port}" /> <property name="password" value="${redis.password}" /> <property name="poolConfig" ref="jedisPoolConfig" /> </bean> <!—- redisTemplate配置，redisTemplate是對Jedis的對redis操作的擴展，有更多的操作，封裝使操作更便捷 --> <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate" p:connection-factory-ref="jedisConnectionFactory" />

上面redisTemplate已經基本配置完成。

接下來創建User類，必須實現或者間接實現Serializable接口：

Redis存儲對象是使用序列化，spring-data-redis已經將序列化的功能內置，不需要我們去管，我們只需要調用api就可以使用。SerialVersionUID字段對序列化擴展有用，為了以后擴展或者縮減字段時不會造成反序列化出錯。

public class User implements Serializable { private static final long serialVersionUID = -7898194272883238670L; public static final String OBJECT_KEY = "USER"; public User() { } public User(String id) { } public User(String id, String name) { this.id = id; this.name = name; } private String id; private String name; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String toString() { return "User [id=" + id + ", name=" + name + "]"; } public String getKey() { return getId(); } public String getObjectKey() { return OBJECT_KEY; } } 創建userService類來操作redis增刪查改緩存對象。

public class UserService { RedisTemplate<String, User> redisTemplate; public RedisTemplate<String, User> getRedisTemplate() { return redisTemplate; } public void setRedisTemplate(RedisTemplate<String, User> redisTemplate) { this.redisTemplate = redisTemplate; } public void put(User user) { redisTemplate.opsForHash().put(user.getObjectKey(), user.getKey(), user); } public void delete(User key) { redisTemplate.opsForHash().delete(key.getObjectKey(), key.getKey()); } public User get(User key) { return (User) redisTemplate.opsForHash().get(key.getObjectKey(), key.getKey()); } } 使用注解方式自動注入， 在UserService注解@Service(“userService”),也可以在Service里寫名字，默認是第一字母小寫。

@Service("userService") public class UserService { @Autowired RedisTemplate<String, User> redisTemplate; …… …… } 在上下文配置文件中，添加自動掃描包的context節點， Base-package的路徑要覆蓋包含注解的類文件 ：

<context:component-scan base-package="*" /> 在main中來簡單操作一下：

public class Main { public static void main( String[] args ) { ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath*:/conf/applicationContext.xml" ); UserService userService = (UserService) applicationContext.getBean("userService"); User user1 = new User("user1ID", "User 1"); User user2 = new User("user2ID", "User 2"); System.out.println("==== getting objects from redis ===="); System.out.println("User is not in redis yet: " + userService.get(user1)); System.out.println("User is not in redis yet: " + userService.get(user2)); System.out.println("==== putting objects into redis ===="); userService.put(user1); userService.put(user2); System.out.println("==== getting objects from redis ===="); System.out.println("User should be in redis yet: " + userService.get(user1)); System.out.println("User should be in redis yet: " + userService.get(user2)); System.out.println("==== deleting objects from redis ===="); userService.delete(user1); userService.delete(user2); System.out.println("==== getting objects from redis ===="); System.out.println("User is not in redis yet: " + userService.get(user1)); System.out.println("User is not in redis yet: " + userService.get(user2)); } } 確保redis服務器是開啟狀態之后就可以運行程序。運行結果如下：

轉載自：點擊打開鏈接

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