使用jedis操作redis常用方法

，在redis入门及在商城案例中的使用中简单介绍了下使用jedis如何操作redis，但是其实方法是跟redis的操作大部分是相对应的。

1、String类型操作

public class StringTest {    Jedis jedis;    @Before//该注解下的方法在@Test执行之前执行    public void before(){        //创建连接        jedis = new Jedis("192.168.25.128",6379);    }    @After//该注解下的方法在@Test执行之后执行    public void after(){        //关闭连接        jedis.close();    }    /*     * 存储，获取，设置过期时间,key命令     */    @Test    public void test() throws InterruptedException{        //1.存储值        jedis.set("name", "张三");        //2.取值        String name = jedis.get("name");        System.out.println(name);        //3.key命令：查看有效期，-1表示持久化，-2表示不存在        Long t = jedis.ttl("name");        System.out.println(t);        System.out.println("-------------------");        //4.key命令,对已经存在的key设置过期时间        jedis.expire("name", 5);        while(true){            String name2 = jedis.get("name");            System.out.println(name2);            System.out.println("有效期为:"+jedis.ttl("name")+"秒");            Thread.sleep(2000);        }    }

输出结果:张三-1-------------------张三有效期为:5秒张三有效期为:3秒张三有效期为:1秒null有效期为:-2秒

    /*     * 测试自增自减:前提，value值能解析为数字类型     * 删除     */    @Test    public void test2(){        jedis.set("age", "18");        String age1 = jedis.get("age");        System.out.println("当前年龄:"+age1);        Long age2 = jedis.decr("age");        System.out.println("一年前年龄为:"+age2);        Long age3 = jedis.incr("age");        System.out.println("现在年龄又变回为:"+age3);        //如果key不存在则忽略此操作        Long del = jedis.del("age1");    }

输出结果:当前年龄:18一年前年龄为:17现在年龄又变回为:18

    /*     * 批量存储和获取     */    @Test    public void test3(){        jedis.mset("a1","mysql","a2","oracle","a3","sqlServer","a4",                "redis","a5","mongodb","a6","hbase");        List<String> list = jedis.mget("a1","a2","a3","a4","a5","a6");        for (String s : list) {            System.out.println(s);        }    }

输出结果：mysqloraclesqlServerredismongodbhbase

    /*     * 存储值的同时设置过期时间,判断key是否存在     */    @Test    public void test4() throws InterruptedException{        //jedis.setex(key, 过期时间, value)        jedis.setex("life", 5, "享受美好");        while(jedis.exists("life")){            System.out.println(jedis.get("life"));            Thread.sleep(2000);        }    }

输出结果:在输出三个“享受美好”之后便不再输出享受美好享受美好享受美好

2、Hash类型操作

public class MapTest {    Jedis jedis;    @Before    public void before(){        jedis = new Jedis("192.168.25.128",6379);    }    @After    public void after(){        jedis.close();    }    @Test    public void test1(){        //1.存储值        jedis.hset("student", "name", "小李");        jedis.hset("student", "class", "小学生");        jedis.hset("student", "age", "10");        jedis.hset("student", "skill", "keng");        //2.获取指定值  获取名字        String name = jedis.hget("student", "name");        System.out.println(name);        System.out.println("----------------------");        //3.获取存储的map        Map<String, String> all = jedis.hgetAll("student");        Set<Entry<String,String>> set = all.entrySet();        Iterator<Entry<String, String>> iterator = set.iterator();        while (iterator.hasNext()) {            Entry<String, String> entry = iterator.next();            String key = entry.getKey();            String value = entry.getValue();            System.out.println(key+":"+value);        }        System.out.println("------------------------------");        //4.获取map中全部key        Set<String> keySet = jedis.hkeys("student");        for (String key : keySet) {            System.out.println(key);        }        System.out.println("-------------------------------");        //5.获取map中全部values        List<String> list = jedis.hvals("student");        for (String value : list) {            System.out.println(value);        }        System.out.println("------------------");        //6.删除指定的值 删除map中class,name两对键值对        Long long1 = jedis.hdel("student", "class","name");        Set<String> set2 = jedis.hkeys("student");        for (String key : set2) {            System.out.println(key);        }        System.out.println("-------------------");        //7.判断map是否存在        Boolean e = jedis.hexists("student", "class");        System.out.println("class是否存在:"+e);        System.out.println("-----------------");        //8.自增自减，可以指定增加减少的数值        jedis.hincrBy("student", "age", 2);        System.out.println(jedis.hget("student", "age"));    }}

输出结果:小李----------------------skill:kengname:小李class:小学生age:10------------------------------nameclassageskill-------------------------------10keng小李小学生------------------ageskill-------------------class是否存在:false-----------------2年后年龄为:12

String跟Hash是最常见的类型，在实习这段时间也都只用到这两种，所以我觉得不管怎样这两种至少应该掌握。

3、List类型操作

public class ListTest {    Jedis jedis;    @Before    public void before(){        jedis = new Jedis("192.168.25.128",6379);    }    @After    public void after(){        jedis.close();    }    @Test    public void test(){        //1.存储值(左边开始)。当成栈（子弹匣），先进先出，入栈        jedis.lpush("scores", "100","90","80","70","60");        //右边开始存        jedis.rpush("scores", "50","40","30","20","10");        //2.取值（左边开始），可以说是同时移除了该值，出栈        String lv = jedis.lpop("scores");        //右边开始取        String rv= jedis.rpop("scores");        System.out.println("左边取为:"+lv);        System.out.println("右边取为:"+rv);        System.out.println("--------------------");        //3.取所有值(只有左边开始取)0 -1表示取所有位置,位置是[start,end]        //redis命令行操作的时候已经演示过        List<String> list = jedis.lrange("scores", 0, -1);        for (String value : list) {            System.out.println(value);        }        System.out.println("-----------");        //4.插队,44插入到100后面,注:没有什么rinsert()方法    jedis.linsert("scores",BinaryClient.LIST_POSITION    .AFTER, "100", "44");        List<String> list2 = jedis.lrange("scores", 0, -1);        for (String value : list2) {            System.out.println(value);        }        List<String> list3 = jedis.lrange("scores", 0, 3);        for (String value : list3) {            System.out.println(value);        }    }}

输出结果:左边取为:60右边取为:10--------------------70809010050403020-----------7080901004450403020---------------708090100

4、Set类型操作

public class JedisTest {    Jedis jedis;    @Before    public void before(){        jedis = new Jedis("192.168.25.128",6379);    }    @After    public void after(){        jedis.close();    }    /*     * 测试添加，取值，移除,判断     */    @Test    public void test1(){        //1.存储        jedis.sadd("names", "Tom","Jack","Harry","Lucy","laowang");        //2.获取set中全部记录,取出来的跟存储的顺序不一样        Set<String> members = jedis.smembers("names");        for (String member : members) {            System.out.println(member);        }        //3.移除指定数据        jedis.srem("names","Tome","Jack");        //4.判断某值是否为set中成员        Boolean tom = jedis.sismember("names", "Tome");        System.out.println("Tom在名单里吗:"+tom);    }

输出结果:JackHarryLucyTomlaowangTom在名单里吗:false

/*     * 差集，交集，并集     */    @Test    public void test2(){        jedis.sadd("set1", "a","b","c","d");        jedis.sadd("set2", "b","c","d","e");        //1.差集 set1中有set2中没有的        Set<String> sdiff = jedis.sdiff("set1","set2");        for (String d : sdiff) {            System.out.println(d);        }        System.out.println("----------------");        //2.交集        Set<String> sinter = jedis.sinter("set1","set2");        for (String in : sinter) {            System.out.println(in);        }        System.out.println("----------------");        //3.并集        Set<String> sunion = jedis.sunion("set1","set2");        for (String un : sunion) {            System.out.println(un);        }    }

输出结果:a----------------dcb----------------deacb

5、Zset（有序Set）类型操作

public class SortedSetTest {    Jedis jedis;    @Before    public void before(){        jedis = new Jedis("192.168.25.128",6379);    }    @After    public void after(){        jedis.close();    }    @Test    public void test1(){        //1.添加        jedis.zadd("table", 1, "a");        jedis.zadd("table", 3, "b");        jedis.zadd("table", 2, "c");        jedis.zadd("table", 5, "d");        jedis.zadd("table", 4, "e");        //2.取值 0 -1表示取所有，可以自己指定开始结束位置，跟list一样        //默认根据分数由低到高排        Set<String> table = jedis.zrange("table", 0, -1);        for (String t : table) {            System.out.println(t);        }        System.out.println("-----------------");        //3.排序,由高到低排        Set<String> table2 = jedis.zrevrange("table", 0, -1);        for (String t : table2) {            System.out.println(t);        }        System.out.println("-----------------");        //4.修改某个值的分数        jedis.zincrby("table", 7, "a");        Set<String> table3 = jedis.zrevrange("table", 0, -1);        for (String t : table3) {            System.out.println(t);        }    }}

输出结果：acbed-----------------debca-----------------adebc