Redis系列（四）——JAVA连接使用redis(Jedis)

Jedis连接操作redis

1.新建项目redis_test，准备好jedis-2.9.0.jar，导入jar。

2.ConnectRedis.java类代码

public class ConnectRedis {public static void main(String[] args) {Jedis jedis = new Jedis("127.0.0.1", 6379);//连接服务器，jedis.auth("yoostar403");//密码登录，没有密码可以跳过这一步System.out.println("connection success");jedis.set("test", "t11");System.out.println(jedis.get("test"));}}

Jedis常用数据类型的基本操作

/** * redis对String、list、set、sortset、hash、key的基本操作 */public class ConnectRedis {private static Jedis jedis;public static void main(String[] args) {jedis = new Jedis("127.0.0.1", 6379);//连接服务器，jedis.auth("yoostar403");//密码登录，没有密码可以跳过这一步System.out.println("connection success");ConnectRedis redis = new ConnectRedis();//redis.str();redis.list();redis.set();redis.sortedset();redis.hash();redis.keys();}/** * string的常用操作 */public void str(){jedis.set("test", "t11");System.out.println(jedis.get("test"));jedis.mset("name1", "张三", "name2", "李四", "name3", "王五");//操纵多个类System.out.println(jedis.mget("name1", "name2", "name3"));System.out.println("新增key303，并指定过期时间为2秒"+jedis.setex("key303", 2, "key303-2second"));     System.out.println("获取key303对应的值："+jedis.get("key303"));     try{     Thread.sleep(3000);         }         catch (InterruptedException e){        }         System.out.println("3秒之后，获取key303对应的值："+jedis.get("key303")); }/** * list常用操作,redis的list的第一个，其实是最后压入的一个，有点像栈 * @param jedis */public void list() {jedis.ltrim("list", 1, 0);//ltrim(key, start, stop),list保留start到stop之间的元素，当start小于stop时，该list数据全部删除jedis.lpush("list", "node1", "node2", "node3", "node4");List<String> list = jedis.lrange("list", 0,-1);System.out.println("list所有元素：" + list);jedis.lset("list", 0, "修改第一个值");//修改单个元素System.out.println("list修改后的所有元素：" +jedis.lrange("list", 0,-1));//排序SortingParams sortingParameters = new SortingParams();sortingParameters.alpha();//加上字符排序参数List<String> slist1 = jedis.sort("list", sortingParameters);System.out.print("list排序后所有元素：" + slist1);//分页sortingParameters = new SortingParams();sortingParameters.alpha();sortingParameters.limit(0, 2);slist1 = jedis.sort("list", sortingParameters);System.out.println("list分页排序后元素：" + slist1);}/** * set的基本操作 */public void set() {jedis.sadd("set1", "s1", "s2", "s2", "s3", "双击666");System.out.print("set中所有元素：" + jedis.smembers("set1"));//删除set中元素jedis.srem("set1", "s2");System.out.print("set删除s2后所有元素：" + jedis.smembers("set1"));jedis.sadd("set2", "s1", "s2", "s3", "s4");System.out.println("set1和set2的交集：" + jedis.sinter("set1", "set2"));System.out.println("set1和set2的并集：" + jedis.sunion("set1", "set2"));System.out.println("set1和set2的差集：" + jedis.sdiff("set1", "set2"));//s1中有，s2中没有}/** * sortedset的基本操作，sortedset是排序set，实现类是TreeSet */public void sortedset() {jedis.zadd("sortSet1", 2, "set2");jedis.zadd("sortSet1", 1, "set1");jedis.zadd("sortSet1", 4, "set4");jedis.zadd("sortSet1", 2, "set3");System.out.println("sortSet1所有元素：" + jedis.zrange("sortSet1", 0, -1));}/** * map操作 */public void hash() {jedis.hset("hash1", "key001", "value001");jedis.hset("hash1", "key002", "value002");jedis.hset("hash1", "key003", "value003");jedis.hset("hash1", "key004", "value004");System.out.println("hash1所有的key：" + jedis.hkeys("hash1"));System.out.println("hash1所有的值：" + jedis.hvals("hash1"));System.out.println("hash1 key为\"003\"的值 ： " + jedis.hget("hash1", "key003"));}/** * key的常用操作 * @param jedis */public void keys() {//判断key是否存在System.out.println("key \"name\" is exit :" + jedis.exists("name"));//查询所有keySet<String> sets = jedis.keys("*");System.out.println("redis所有的key：" + sets);}}