RedisTemplate常用操作及解析

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.ArrayList;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class RedisTemplateTests {
   @Autowired
   RedisTemplate redisTemplate;

   @Test
   //字符串操作
   public void opsForValue() {
      redisTemplate.opsForValue().set("key","abc");//插入key
      System.out.println(redisTemplate.opsForValue().get("key"));//获取value
      System.out.println(redisTemplate.opsForValue().size("key"));//获取value长度>>3
      System.out.println(redisTemplate.delete("key"));//删除key
      System.out.println(redisTemplate.opsForValue().get("key"));//获取value>>null
      System.out.println(redisTemplate.opsForValue().getAndSet("key","def"));//获取value,如果没有就设值
      System.out.println(redisTemplate.opsForValue().get("key",0,1));//获取并截取指定长度的value>>de
      System.out.println(redisTemplate.opsForValue().append("key","fcd"));//拼接字符串并返回拼接后的长度>>6
   }

   @Test
   //set操作
   public void opsForSet() {
      redisTemplate.opsForSet().add("set1","a","b","c","d");//插入元素
      redisTemplate.opsForSet().add("set2","c","d","e","f");//插入元素
      System.out.println(redisTemplate.opsForSet().size("set1"));//获取长度
      System.out.println(redisTemplate.opsForSet().members("set1"));//获取所有元素>>[b, d, c, a]
      System.out.println(redisTemplate.opsForSet().randomMember("set1"));//随机获取列表中的某个元素
      System.out.println(redisTemplate.opsForSet().randomMembers("set1",2));//随机获取列表中的n个元素>>[c, a]
      System.out.println(redisTemplate.opsForSet().isMember("set1","a"));//判断是否有指定元素>>true
      System.out.println(redisTemplate.opsForSet().difference("set1", "set2"));//比较1和2的不同>>[b, a]
      System.out.println(redisTemplate.opsForSet().difference("set2", "set1"));//[e, f]
      System.out.println(redisTemplate.opsForSet().intersect("set1","set2"));//获取两个集合交集>>[d, c]
      System.out.println(redisTemplate.opsForSet().intersectAndStore("set1","set2","set3"));//获取两个集合交集后存储到另一个集合,并返回元素个数>>2
      System.out.println(redisTemplate.opsForSet().union("set1","set2"));//合并两个集合>>[d, c, f, e, a]
      System.out.println(redisTemplate.opsForSet().unionAndStore("set1","set2","set4"));//合并两个集合后存储到另一个集合,并返回元素个数>>5
      redisTemplate.opsForSet().remove("set1","b");//移除指定元素
      System.out.println(redisTemplate.opsForSet().members("set1"));
      redisTemplate.opsForSet().pop("set3");//从右侧弹出变量中的元素
      redisTemplate.opsForSet().pop("set4",2);//从右侧弹出变量中的n个元素
   }

   @Test
   //列表操作-在列表的左侧添加元素
   public void opsForList_leftPush() {
      redisTemplate.opsForList().leftPush("list","a");//列表插入一个元素
      redisTemplate.opsForList().leftPush("list","b");//追加多一个元素
      redisTemplate.opsForList().leftPushAll("list","c","d");//列表插入多个元素
      List list = new ArrayList(){{add("e");add("f");}};
      redisTemplate.opsForList().leftPushAll("list",list);//插入列表
      for (int i = 8; i >= 0; i--) {
         System.out.println(i+": "+redisTemplate.opsForList().leftPop("list"));
      }
   }

   @Test
   //列表操作-在列表的右侧添加元素
   public void opsForList_rightPush() {
      redisTemplate.opsForList().rightPush("list","a");//列表插入一个元素
      redisTemplate.opsForList().rightPush("list","b");//追加多一个元素
      redisTemplate.opsForList().rightPushAll("list","c","d");//列表插入多个元素
      List list = new ArrayList(){{add("e");add("f");}};
      redisTemplate.opsForList().rightPushAll("list",list);//插入列表
      for (int i = 8; i >= 0; i--) {
         System.out.println(i+": "+redisTemplate.opsForList().rightPop("list"));
      }
   }

   @Test
   //列表操作-其它操作
   public void opsForList_other() {
      redisTemplate.opsForList().rightPushAll("list","a","b","c","d");
      System.out.println(redisTemplate.opsForList().index("list", 0));//获取第n个元素
      System.out.println(redisTemplate.opsForList().size("list"));//获取列表长度
      System.out.println(redisTemplate.opsForList().range("list", 0, -1));//获取指定区间的值
      redisTemplate.opsForList().remove("list",-1,"c");//n>0就是从左边删除n个元素d:n<0就是从右边删除n个元素;n为0就是删除所有;
      System.out.println(redisTemplate.opsForList().range("list", 0, -1));
      redisTemplate.opsForList().set("list",1,"a");//在指定索引插入元素
      System.out.println(redisTemplate.opsForList().range("list", 0, -1));
      redisTemplate.opsForList().trim("list",0,5);//截取并保留指定范围内长度
      System.out.println(redisTemplate.opsForList().range("list", 0, -1));
   }

}