Get Jedis examples via JedisPool

The goal of this section

Get Jedis examples through JedisPool and complete simple Key-value read and write operations on redis.

The complete code structure is as follows:

redis server

Run redis-server.exe locally, Then create a new jedis.properties in resources:

redis.host=localhost
redis.port=6379

Configuring jedis

We put the jedis related configuration in a separate In Spring Config, create a new applicationContext-jedis.xml in the resources/spring directory.

     <!-- 加载配置属性文件 -->
    <property-placeholder></property-placeholder>

    <bean>
        <property></property> <!-- 最大能够保持idel状态的对象数  -->
        <property></property> <!-- 最大分配的对象数 -->
        <property></property> <!-- 当调用borrow Object方法时，是否进行有效性检查 -->
    </bean>

    <bean>
        <constructor-arg></constructor-arg>
        <constructor-arg></constructor-arg>
        <constructor-arg></constructor-arg>
    </bean>

Test

Add a unit test and obtain the JedisPool instance object through the @Resource annotation.

@Resourceprivate JedisPool jedisPool;

Then call the getResource() method of the jedisPool object to obtain the Jedis instance.

Jedis jedis = jedisPool.getResource();

First test the most basic get and set operations

    @Testpublic void TestRedis() {
        Jedis jedis = jedisPool.getResource();

        String key = "a";
        jedis.set(key, "111");

        String data = jedis.get(key);

        System.out.println(data);

    }

Running result: 111

Test a list operation again:

@Testpublic  void testList(){
        Jedis jedis=jedisPool.getResource();

        String key="articles";

        jedis.lpush(key,"文章1");
        jedis.lpush(key,"文章2");
        jedis.lpush(key,"文章3");

        List<string> articles=jedis.lrange(key,0,3);for(String article:articles){
            System.out.println(article);
        }
    }</string>

Run result:

Article 3

Article 2

Article 1

Another collection operation:

@Testpublic void testSet(){
        Jedis jedis=jedisPool.getResource();

        String key="tags";
        jedis.sadd(key,"宝马");
        jedis.sadd(key,"豪车");
        jedis.sadd(key,"SUV");
        jedis.sadd(key,"SUV");

        Set<string> tags=jedis.smembers(key);for(String tag:tags){
            System.out.println(tag);
        }
    }</string>

Run result:

BMW

luxury car

SUV

Let’s get here first, SO EASY!!

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