java 操作redis(3)

项目中使用redis

使用jedis操作redis测试

进行测试之前需要引入依赖

       

          redis.clients

         jedis

         2.9.0

         

测试

    public class RedisTest {

        Jedis jedis = null;

           // 1.建立连接

        // 2.操作数据(五种)

        @Before

        public void init() {

            // 打开连接

            //创建jedis对象，如果不写端口，默认6379

            jedis=new Jedis("127.0.0.1",6379);

            //验证密码，如果无密码，这步可省略

            //jedis.auth("");

        }

          @Test

        public void testString(){

            //向redis放string类型数据

        //姓名

            jedis.set("name", "xiaofang");

            //年令

            jedis.set("age", "18");

            //年令加1

            jedis.incr("age");

            System.out.println(jedis.get("age"));

            //年令加5

            jedis.incrBy("age", 5);

            System.out.println("加5岁之后"+jedis.get("age"));

            //减1

            jedis.decr("age");

            System.out.println("减1岁之后"+jedis.get("age"));

            jedis.decrBy("age", 6);

            System.out.println("减6岁之后"+jedis.get("age"));

        }

        @Test

        public void testHash(){

            //可以向这里放map

            Map map=new HashMap<>();

            map.put("name", "chunyu");

            map.put("pass", "123456");

            map.put("age", "23");

            jedis.hmset("liuchunyu", map);

            //也可以直接向key/value

            jedis.hset("liuchunyu", "email", "[email protected]");

            //读取单个信息

            System.out.println(jedis.hget("liuchunyu", "email"));

            //读取所有key

            Set keys=jedis.hkeys("liuchunyu");

            for(String key:keys){

                System.out.println(key);

            }

            System.out.println("---------------------");

            //读取所有values

            List vs=jedis.hvals("liuchunyu");

            for(String v:vs){

                System.out.println(v);

            }

            System.out.println("---------------------");

            //读取所有的key/value

            Map items=jedis.hgetAll("liuchunyu");

            Set>all=items.entrySet();

            for(Entry e:all){

                System.out.println(e.getKey());

                System.out.println(e.getValue());

            }

            //keyset方式学生练习一下

            System.out.println("------------------->");

            Set mm=items.keySet();

            for(String m:mm){

                System.out.println(items.get(m));

            }

        }

    @Test

    public void testList(){

        //向list里放数据

        //从上面放6个数据

        jedis.lpush("images", "1.jpg");

        jedis.lpush("images", "2.jpg");

        jedis.lpush("images", "3.jpg");

        jedis.lpush("images", "4.jpg");

        jedis.lpush("images", "5.jpg");

        jedis.lpush("images", "6.jpg");

        //截取数据,留下哪些,索引从0开始，最后一个为-1

        jedis.ltrim("images", 0, 3);

        //读取所有数据

        List list=jedis.lrange("images", 0, -1);

        for(String item:list){

            System.out.println(item);

        }

    }

    @Test

    public void testSet(){

        //成员添加

        jedis.sadd("users", "ms");

        jedis.sadd("users", "cx");

        jedis.sadd("users", "jhq");

        jedis.sadd("users", "fyl");

        Set us=jedis.smembers("users");

        //打印所有成员

        for(String u:us){

            System.out.println(u);

        }

        //获取成员人个数

        System.out.println(jedis.scard("users"));

    }

    @Test

    public void testSortedSet() {

        // 构建map

        Map m = new HashMap<>();

        m.put("m10", 1.0);

        m.put("m12", 1.2);

        m.put("m11", 1.1);

        m.put("m16", 1.6);

        m.put("m15", 1.5);

        m.put("m15", 1.7);

        m.put("m13", 1.3);

        m.put("m14", 1.4);

        // 放入redis

        jedis.zadd("movies", m);

        // 读取

        // 第一种正序读

        Set ms = jedis.zrange("movies", 0, -1);

        for (String item : ms) {

            System.out.println(item);

        }

        System.out.println("倒序读---------------->");

        // 第二种倒序读

        Set ms_r = jedis.zrevrange("movies", 0, -1);

        for (String item : ms_r) {

            System.out.println(item);

        }

        //带序号读取--正序

        System.out.println("正序带序号---------------->");

        Set ms_score=jedis.zrangeByScore("movies", 1.0, 1.7);

        for(String sc:ms_score){

            System.out.println(sc);

        }

        //带序号读取-倒序

        System.out.println("倒序带序号---------------->");

        Set ms_rscore=jedis.zrevrangeByScore("movies", 1.7, 1.0);

        for(String sc:ms_rscore){

            System.out.println(sc);

        }

    }

     }