二 java 中使用redis API编辑基本数据类型

Posted 2021-02-02 chensm

package com.ssm.chapter18.main;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.data.redis.connection.RedisListCommands;
import org.springframework.data.redis.connection.RedisZSetCommands.Limit;
import org.springframework.data.redis.connection.RedisZSetCommands.Range;
import org.springframework.data.redis.core.DefaultTypedTuple;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ZSetOperations.TypedTuple;

public class Chapter18Main {

   public static void main(String[] args) {
      testString();
//    testCal();
//    testRedisHash();
//    testList();
//    testBList();
//    testSet();
//    testZset();
//    testHyperLogLog();
   }

   public static void testString() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      // 设值
      redisTemplate.opsForValue().set("key1", "value1");
      redisTemplate.opsForValue().set("key2", "value2");
      // 通过key获取值
      String value1 = (String) redisTemplate.opsForValue().get("key1");
      System.out.println(value1);
      // 通过key删除值
      redisTemplate.delete("key1");
      // 求长度
      Long length = redisTemplate.opsForValue().size("key2");
      System.out.println(length);
      // 设值新值并返回旧值
      String oldValue2 = (String) redisTemplate.opsForValue().getAndSet("key2", "new_value2");
      System.out.println(oldValue2);
      // 通过key获取值.
      String value2 = (String) redisTemplate.opsForValue().get("key2");
      System.out.println(value2);
      // 求子串
      String rangeValue2 = redisTemplate.opsForValue().get("key2", 0, 3);
      System.out.println(rangeValue2);
      // 追加字符串到末尾，返回新串长度
      int newLen = redisTemplate.opsForValue().append("key2", "_app");
      System.out.println(newLen);
      String appendValue2 = (String) redisTemplate.opsForValue().get("key2");
      System.out.println(appendValue2);
   }

   /**
    * 测试Redis运算.
    */
   public static void testCal() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      redisTemplate.opsForValue().set("i", "9");
      printCurrValue(redisTemplate, "i");
      redisTemplate.opsForValue().increment("i", 1);
      printCurrValue(redisTemplate, "i");
      redisTemplate.getConnectionFactory().getConnection().decr(redisTemplate.getKeySerializer().serialize("i"));
      printCurrValue(redisTemplate, "i");
      redisTemplate.getConnectionFactory().getConnection().decrBy(redisTemplate.getKeySerializer().serialize("i"), 6);
      printCurrValue(redisTemplate, "i");
      redisTemplate.opsForValue().increment("i", 2.3);
      printCurrValue(redisTemplate, "i");
   }

   /**
    * 打印当前key的值
    * 
    * @param redisTemplate
    *            spring RedisTemplate
    * @param key键
    */
   public static void printCurrValue(RedisTemplate redisTemplate, String key) {
      String i = (String) redisTemplate.opsForValue().get(key);
      System.err.println(i);
   }

   public static void testRedisHash() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      String key = "hash";
      Map<String, String> map = new HashMap<String, String>();
      map.put("f1", "val1");
      map.put("f2", "val2");
      // 相当于hmset命令
      redisTemplate.opsForHash().putAll(key, map);
      // 相当于hset命令
      redisTemplate.opsForHash().put(key, "f3", "6");
      printValueForhash(redisTemplate, key, "f3");
      // 相当于 hexists key filed命令
      boolean exists = redisTemplate.opsForHash().hasKey(key, "f3");
      System.out.println(exists);
      // 相当于hgetall命令
      Map keyValMap = redisTemplate.opsForHash().entries(key);
      // 相当于hincrby命令
      redisTemplate.opsForHash().increment(key, "f3", 2);
      printValueForhash(redisTemplate, key, "f3");
      // 相当于hincrbyfloat命令
      redisTemplate.opsForHash().increment(key, "f3", 0.88);
      printValueForhash(redisTemplate, key, "f3");
      // 相当于hvals命令
      List valueList = redisTemplate.opsForHash().values(key);
      // 相当于hkeys命令
      Set keyList = redisTemplate.opsForHash().keys(key);
      List<String> fieldList = new ArrayList<String>();
      fieldList.add("f1");
      fieldList.add("f2");
      // 相当于hmget命令
      List valueList2 = redisTemplate.opsForHash().multiGet(key, keyList);
      // 相当于hsetnx命令
      boolean success = redisTemplate.opsForHash().putIfAbsent(key, "f4", "val4");
      System.out.println(success);
      // 相当于hdel命令
      Long result = redisTemplate.opsForHash().delete(key, "f1", "f2");
      System.out.println(result);
   }

   private static void printValueForhash(RedisTemplate redisTemplate, String key, String field) {
      // 相当于hget命令
      Object value = redisTemplate.opsForHash().get(key, field);
      System.out.println(value);
   }

   public static void testList() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      try {
         // 删除链表，以便我们可以反复测试
         redisTemplate.delete("list");
         // 把node3插入链表list
         redisTemplate.opsForList().leftPush("list", "node3");
         List<String> nodeList = new ArrayList<String>();
         for (int i = 2; i >= 1; i--) {
            nodeList.add("node" + i);
         }
         // 相当于lpush把多个价值从左插入链表
         redisTemplate.opsForList().leftPushAll("list", nodeList);
         // 从右边插入一个节点
         redisTemplate.opsForList().rightPush("list", "node4");
         // 获取下标为0的节点
         String node1 = (String) redisTemplate.opsForList().index("list", 0);
         // 获取链表长度
         long size = redisTemplate.opsForList().size("list");
         // 从左边弹出一个节点
         String lpop = (String) redisTemplate.opsForList().leftPop("list");
         // 从右边弹出一个节点
         String rpop = (String) redisTemplate.opsForList().rightPop("list");
         // 注意，需要使用更为底层的命令才能操作linsert命令
         // 使用linsert命令在node2前插入一个节点
         redisTemplate.getConnectionFactory().getConnection().lInsert("list".getBytes("utf-8"),
               RedisListCommands.Position.BEFORE, "node2".getBytes("utf-8"), "before_node".getBytes("utf-8"));
         // 使用linsert命令在node2后插入一个节点
         redisTemplate.getConnectionFactory().getConnection().lInsert("list".getBytes("utf-8"),
               RedisListCommands.Position.AFTER, "node2".getBytes("utf-8"), "after_node".getBytes("utf-8"));
         // 判断list是否存在，如果存在则从左边插入head节点
         redisTemplate.opsForList().leftPushIfPresent("list", "head");
         // 判断list是否存在，如果存在则从右边插入end节点
         redisTemplate.opsForList().rightPushIfPresent("list", "end");
         // 从左到右，或者下标从0到10的节点元素
         List valueList = redisTemplate.opsForList().range("list", 0, 10);
         nodeList.clear();
         for (int i = 1; i <= 3; i++) {
            nodeList.add("node");
         }
         // 在链表左边插入三个值为node的节点
         redisTemplate.opsForList().leftPushAll("list", nodeList);
         // 从左到右删除至多三个node节点
         redisTemplate.opsForList().remove("list", 3, "node");
         // 给链表下标为0的节点设置新值
         redisTemplate.opsForList().set("list", 0, "new_head_value");
      } catch (UnsupportedEncodingException ex) {
         ex.printStackTrace();
      }
      // 打印链表数据
      printList(redisTemplate, "list");
   }

   public static void printList(RedisTemplate redisTemplate, String key) {
      // 链表长度
      Long size = redisTemplate.opsForList().size(key);
      // 获取整个链表的值
      List valueList = redisTemplate.opsForList().range(key, 0, size);
      // 打印
      System.out.println(valueList);
   }

   public static void testBList() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      // 清空数据，可以重复测试
      redisTemplate.delete("list1");
      redisTemplate.delete("list2");
      // 初始化链表list1
      List<String> nodeList = new ArrayList<String>();
      for (int i = 1; i <= 5; i++) {
         nodeList.add("node" + i);
      }
      redisTemplate.opsForList().leftPushAll("list1", nodeList);
      // Spring使用参数超时时间作为阻塞命令区分，等价于blpop命令，并且可以设置时间参数
      redisTemplate.opsForList().leftPop("list1", 1, TimeUnit.SECONDS);
      // Spring使用参数超时时间作为阻塞命令区分，等价于brpop命令，并且可以设置时间参数
      redisTemplate.opsForList().rightPop("list1", 1, TimeUnit.SECONDS);
      nodeList.clear();
      // 初始化链表list2
      for (int i = 1; i <= 3; i++) {
         nodeList.add("data" + i);
      }
      redisTemplate.opsForList().leftPushAll("list2", nodeList);
      // 相当于rpoplpush命令，弹出list1最右边的节点，插入到list2最左边
      redisTemplate.opsForList().rightPopAndLeftPush("list1", "list2");
      // 相当于brpoplpush命令，注意在Spring中使用超时参数区分
      redisTemplate.opsForList().rightPopAndLeftPush("list1", "list2", 1, TimeUnit.SECONDS);
      // 打印链表数据
      printList(redisTemplate, "list1");
      printList(redisTemplate, "list2");
   }

   public static void testSet() {
      // 请把RedisTemplate值序列化器设置为StringRedisSerializer测试该代码片段
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      Set set = null;
      // 将元素加入列表
      redisTemplate.boundSetOps("set1").add("v1", "v2", "v3", "v4", "v5", "v6");
      redisTemplate.boundSetOps("set2").add("v0", "v2", "v4", "v6", "v8");
      // 求集合长度
      redisTemplate.opsForSet().size("set1");
      // 求差集
      set = redisTemplate.opsForSet().difference("set1", "set2");
      // 求并集
      set = redisTemplate.opsForSet().intersect("set1", "set2");
      // 判断是否集合中的元素
      boolean exists = redisTemplate.opsForSet().isMember("set1", "v1");
      // 获取集合所有元素
      set = redisTemplate.opsForSet().members("set1");
      // 从集合中随机弹出一个元素
      String val = (String) redisTemplate.opsForSet().pop("set1");
      // 随机获取一个集合的元素
      val = (String) redisTemplate.opsForSet().randomMember("set1");
      // 随机获取2个集合的元素
      List list = redisTemplate.opsForSet().randomMembers("set1", 2L);
      // 删除一个集合的元素，参数可以是多个
      redisTemplate.opsForSet().remove("set1", "v1");
      // 求两个集合的并集
      redisTemplate.opsForSet().union("set1", "set2");
      // 求两个集合的差集，并保存到集合diff_set中
      redisTemplate.opsForSet().differenceAndStore("set1", "set2", "diff_set");
      // 求两个集合的交集，并保存到集合inter_set中
      redisTemplate.opsForSet().intersectAndStore("set1", "set2", "inter_set");
      // 求两个集合的并集，并保存到集合union_set中
      redisTemplate.opsForSet().unionAndStore("set1", "set2", "union_set");
   }

   public static void testZset() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      // Spring提供接口TypedTuple操作有序集合
      Set<TypedTuple> set1 = new HashSet<TypedTuple>();
      Set<TypedTuple> set2 = new HashSet<TypedTuple>();
      int j = 9;
      for (int i = 1; i <= 9; i++) {
         j--;
         // 计算分数和值
         Double score1 = Double.valueOf(i);
         String value1 = "x" + i;
         Double score2 = Double.valueOf(j);
         String value2 = j % 2 == 1 ? "y" + j : "x" + j;
         // 使用Spring提供的默认TypedTuple——DefaultTypedTuple
         TypedTuple typedTuple1 = new DefaultTypedTuple(value1, score1);
         set1.add(typedTuple1);
         TypedTuple typedTuple2 = new DefaultTypedTuple(value2, score2);
         set2.add(typedTuple2);
      }
      // 将元素插入有序集合zset1
      redisTemplate.opsForZSet().add("zset1", set1);
      redisTemplate.opsForZSet().add("zset2", set2);
      // 统计总数
      Long size = null;
      size = redisTemplate.opsForZSet().zCard("zset1");
      // 计分数为score，那么下面的方法就是求3<=score<=6的元素
      size = redisTemplate.opsForZSet().count("zset1", 3, 6);
      Set set = null;
      // 从下标一开始截取5个元素，但是不返回分数,每一个元素是String
      set = redisTemplate.opsForZSet().range("zset1", 1, 5);
      printSet(set);
      // 截取集合所有元素，并且对集合按分数排序，并返回分数,每一个元素是TypedTuple
      set = redisTemplate.opsForZSet().rangeWithScores("zset1", 0, -1);
      printTypedTuple(set);
      // 将zset1和zset2两个集合的交集放入集合inter_zset
      size = redisTemplate.opsForZSet().intersectAndStore("zset1", "zset2", "inter_zset");
      // 区间
      Range range = Range.range();
      range.lt("x8");// 小于
      range.gt("x1");// 大于
      set = redisTemplate.opsForZSet().rangeByLex("zset1", range);
      printSet(set);
      range.lte("x8");// 小于等于
      range.gte("x1");// 大于等于
      set = redisTemplate.opsForZSet().rangeByLex("zset1", range);
      printSet(set);
      // 限制返回个数
      Limit limit = Limit.limit();
      // 限制返回个数
      limit.count(4);
      // 限制从第五个开始截取
      limit.offset(5);
      // 求区间内的元素，并限制返回4条
      set = redisTemplate.opsForZSet().rangeByLex("zset1", range, limit);
      printSet(set);
      // 求排行，排名第1返回0，第2返回1
      Long rank = redisTemplate.opsForZSet().rank("zset1", "x4");
      System.err.println("rank = " + rank);
      // 删除元素，返回删除个数
      size = redisTemplate.opsForZSet().remove("zset1", "x5", "x6");
      System.err.println("delete = " + size);
      // 按照排行删除从0开始算起，这里将删除第排名第2和第3的元素
      size = redisTemplate.opsForZSet().removeRange("zset2", 1, 2);
      // 获取所有集合的元素和分数，以-1代表全部元素
      set = redisTemplate.opsForZSet().rangeWithScores("zset2", 0, -1);
      printTypedTuple(set);
      // 删除指定的元素
      size = redisTemplate.opsForZSet().remove("zset2", "y5", "y3");
      System.err.println(size);
      // 给集合中的一个元素的分数加上11
      Double dbl = redisTemplate.opsForZSet().incrementScore("zset1", "x1", 11);
      redisTemplate.opsForZSet().removeRangeByScore("zset1", 1, 2);
      set = redisTemplate.opsForZSet().reverseRangeWithScores("zset2", 1, 10);
      printTypedTuple(set);
   }

   /**
    * 打印TypedTuple集合
    * 
    * @param set
    *            -- Set<TypedTuple>
    */
   public static void printTypedTuple(Set<TypedTuple> set) {
      if (set != null && set.isEmpty()) {
         return;
      }
      Iterator iterator = set.iterator();
      while (iterator.hasNext()) {
         TypedTuple val = (TypedTuple) iterator.next();
         System.err.print("{value = " + val.getValue() + ", score = " + val.getScore() + "}
");
      }
   }

   /**
    * 打印普通集合
    * 
    * @param set普通集合
    */
   public static void printSet(Set set) {
      if (set != null && set.isEmpty()) {
         return;
      }
      Iterator iterator = set.iterator();
      while (iterator.hasNext()) {
         Object val = iterator.next();
         System.out.print(val + "	");
      }
      System.out.println();
   }

   public static void testHyperLogLog() {
      ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
      RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);
      redisTemplate.opsForHyperLogLog().add("HyperLogLog", "a", "b", "c", "d", "a");
      redisTemplate.opsForHyperLogLog().add("HyperLogLog2", "a");
      redisTemplate.opsForHyperLogLog().add("HyperLogLog2", "z");
      Long size = redisTemplate.opsForHyperLogLog().size("HyperLogLog");
      System.err.println(size);
      size = redisTemplate.opsForHyperLogLog().size("HyperLogLog2");
      System.err.println(size);
      redisTemplate.opsForHyperLogLog().union("des_key", "HyperLogLog", "HyperLogLog2");
      size = redisTemplate.opsForHyperLogLog().size("des_key");
      System.err.println(size);
   }
}