Java使用Redis()-java
Java使用Redis()
1.下载 jedis.jar
2. 四个数据类型以及键操作
public class RedisTest {
public static void main(String[] args) throws InterruptedException {
RedisTest redisTest = new RedisTest();
redisTest.KeyTest();
}
public void StringTest(){
//连接本地的 Redis 服务
Jedis jedis = new Jedis("localhost");
//查看服务是否运行
System.out.println("Server is running: "+jedis.ping());
//String
//添加
jedis.set("food","fish");
System.out.println(jedis.get("food"));
//修改
jedis.append("food","apple");
System.out.println(jedis.get("food"));
//覆盖
jedis.set("food","fish2");
System.out.println(jedis.get("food"));
//修改
jedis.del("food");
System.out.println(jedis.get("food"));
//同时设置
jedis.mset("name","lwx","age","12");
System.out.println(jedis.mget("name","age"));
}
public void MapTest(){
Jedis jedis = new Jedis("localhost");
System.out.println("Server is running: "+jedis.ping());
Map<String,String> map = new HashMap<>();
map.put("name", "lwx");
map.put("age","12");
jedis.hmset("map",map);
List<String> name = jedis.hmget("map","name");
System.out.println(name);
System.out.println(jedis.hmget("map","age"));
System.out.println(jedis.hlen("map"));//map键的个数
System.out.println(jedis.exists("map"));//是否存在key为map的记录
System.out.println(jedis.hkeys("map"));//返回map对象中的所有key
System.out.println(jedis.hvals("map"));//返回map对象中的所有value
Iterator<String> iter=jedis.hkeys("map").iterator();
while (iter.hasNext()){
String key = iter.next();
System.out.println(key+":"+jedis.hmget("map",key));
}
//删除
jedis.hdel("map","name");
}
public void ListTest() {
//连接本地的 Redis 服务
Jedis jedis = new Jedis("localhost");
//查看服务是否运行
System.out.println("Server is running: " + jedis.ping());
// List
jedis.lpush("list", "Redis");
jedis.lpush("list", "Mongodb");
jedis.lpush("list", "Mysql");
// 获取存储的数据并输出
List<String> list = jedis.lrange("list", 0, 5);
for (int i = 0; i < list.size(); i++) {
System.out.println("Stored string in redis:: " + list.get(i));
}
}
public void SetTest(){
Jedis jedis = new Jedis("localhost");
jedis.sadd("sname","meepo");
jedis.sadd("sname","dota");
jedis.sadd("sname","poofu");
jedis.sadd("sname","noname");
//移除
jedis.srem("sname","noname");
System.out.println(jedis.smembers("sname"));//获取所有加入的member
System.out.println(jedis.sismember("sname", "meepo"));//判断 member 是否是集合的元素
System.out.println(jedis.srandmember("sname"));//返回随机一个member
System.out.println(jedis.scard("sname"));//返回集合的元素个数
}
public void KeyTest() throws InterruptedException{
Jedis jedis = new Jedis("localhost");
//返回当前库中所有的key *通配符
System.out.println(jedis.keys("*"));
//删除key为sanmdde的对象 删除成功返回1 删除失败（或者不存在）返回 0
System.out.println(jedis.del("sanmdde"));
//返回给定key的有效时间，如果是-1则表示永远有效
System.out.println(jedis.ttl("sname"));
//通过此方法，可以指定key的存活（有效时间） 时间为秒
jedis.setex("timekey", 10, "min");
Thread.sleep(5000);//睡眠5秒后，剩余时间将为<=5
System.out.println(jedis.ttl("timekey")); //输出结果为5
//jedis 排序
//注意，此处的rpush和lpush是List的操作。是一个双向链表（但从表现来看的）
jedis.del("a");//先清除数据，再加入数据进行测试
jedis.rpush("a", "1");
jedis.lpush("a","6");
jedis.lpush("a","3");
jedis.lpush("a","9");
System.out.println(jedis.lrange("a",0,-1));// [9, 3, 6, 1]
System.out.println(jedis.sort("a")); //[1, 3, 6, 9] //输入排序后结果
System.out.println(jedis.lrange("a",0,-1));
}
}
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1.下载 jedis.jar
2. 四个数据类型以及键操作
public class RedisTest {
public static void main(String[] args) throws InterruptedException {
RedisTest redisTest = new RedisTest();
redisTest.KeyTest();
}
public void StringTest(){
//连接本地的 Redis 服务
Jedis jedis = new Jedis("localhost");
//查看服务是否运行
System.out.println("Server is running: "+jedis.ping());
//String
//添加
jedis.set("food","fish");
System.out.println(jedis.get("food"));
//修改
jedis.append("food","apple");
System.out.println(jedis.get("food"));
//覆盖
jedis.set("food","fish2");
System.out.println(jedis.get("food"));
//修改
jedis.del("food");
System.out.println(jedis.get("food"));
//同时设置
jedis.mset("name","lwx","age","12");
System.out.println(jedis.mget("name","age"));
}
public void MapTest(){
Jedis jedis = new Jedis("localhost");
System.out.println("Server is running: "+jedis.ping());
Map<String,String> map = new HashMap<>();
map.put("name", "lwx");
map.put("age","12");
jedis.hmset("map",map);
List<String> name = jedis.hmget("map","name");
System.out.println(name);
System.out.println(jedis.hmget("map","age"));
System.out.println(jedis.hlen("map"));//map键的个数
System.out.println(jedis.exists("map"));//是否存在key为map的记录
System.out.println(jedis.hkeys("map"));//返回map对象中的所有key
System.out.println(jedis.hvals("map"));//返回map对象中的所有value
Iterator<String> iter=jedis.hkeys("map").iterator();
while (iter.hasNext()){
String key = iter.next();
System.out.println(key+":"+jedis.hmget("map",key));
}
//删除
jedis.hdel("map","name");
}
public void ListTest() {
//连接本地的 Redis 服务
Jedis jedis = new Jedis("localhost");
//查看服务是否运行
System.out.println("Server is running: " + jedis.ping());
// List
jedis.lpush("list", "Redis");
jedis.lpush("list", "Mongodb");
jedis.lpush("list", "Mysql");
// 获取存储的数据并输出
List<String> list = jedis.lrange("list", 0, 5);
for (int i = 0; i < list.size(); i++) {
System.out.println("Stored string in redis:: " + list.get(i));
}
}
public void SetTest(){
Jedis jedis = new Jedis("localhost");
jedis.sadd("sname","meepo");
jedis.sadd("sname","dota");
jedis.sadd("sname","poofu");
jedis.sadd("sname","noname");
//移除
jedis.srem("sname","noname");
System.out.println(jedis.smembers("sname"));//获取所有加入的member
System.out.println(jedis.sismember("sname", "meepo"));//判断 member 是否是集合的元素
System.out.println(jedis.srandmember("sname"));//返回随机一个member
System.out.println(jedis.scard("sname"));//返回集合的元素个数
}
public void KeyTest() throws InterruptedException{
Jedis jedis = new Jedis("localhost");
//返回当前库中所有的key *通配符
System.out.println(jedis.keys("*"));
//删除key为sanmdde的对象 删除成功返回1 删除失败（或者不存在）返回 0
System.out.println(jedis.del("sanmdde"));
//返回给定key的有效时间，如果是-1则表示永远有效
System.out.println(jedis.ttl("sname"));
//通过此方法，可以指定key的存活（有效时间） 时间为秒
jedis.setex("timekey", 10, "min");
Thread.sleep(5000);//睡眠5秒后，剩余时间将为<=5
System.out.println(jedis.ttl("timekey")); //输出结果为5
//jedis 排序
//注意，此处的rpush和lpush是List的操作。是一个双向链表（但从表现来看的）
jedis.del("a");//先清除数据，再加入数据进行测试
jedis.rpush("a", "1");
jedis.lpush("a","6");
jedis.lpush("a","3");
jedis.lpush("a","9");
System.out.println(jedis.lrange("a",0,-1));// [9, 3, 6, 1]
System.out.println(jedis.sort("a")); //[1, 3, 6, 9] //输入排序后结果
System.out.println(jedis.lrange("a",0,-1));
}
}