一、Redis入门
1.Redis简介
2.Redis 下载与安装
3.Redis 数据类型
1、介绍
2、Redis常见5种数据类型
二、Redis 常用命令
1.字符串 string 操作命令
2.哈希 hash 操作命令
3. 列表 list 操作命令
4. 集合 set 操作命令
5. 有序集合 sorted set 操作命令
6. 通用命令
三、在 Java 中操作 Redis
1. redis中5种类型java代码
java中操作redis代码:
package com.example.springdataredis_demo;
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.connection.DataType;
import org.springframework.data.redis.core.*;
import org.springframework.test.context.junit4.SpringRunner;
import java.util.Set;
@SpringBootTest
@RunWith(SpringRunner.class)
public class SpringDataRedisTest {
@Autowired
private StringRedisTemplate stringRedisTemplate;
/**
* 操作string类型的数据
*/
@Test
public void testString(){
// stringRedisTemplate.opsForValue().set("city","beijing");
// stringRedisTemplate.opsForValue().get("city");
Boolean aBoolean = stringRedisTemplate.opsForValue().setIfAbsent("city22", "东京");
System.out.println(aBoolean);
}
/**
* 操作hash类型的数据(适合存对象
*/
@Test
public void testHash(){
//存值
HashOperations<String, String, String> hashOperations = stringRedisTemplate.opsForHash();
hashOperations.put("001","姓名","小明");
hashOperations.put("001","年龄","20");
hashOperations.put("001","生日","2001-09-05");
//取值
String name = hashOperations.get("001", "姓名");
System.out.println(name);
for (String key : hashOperations.keys("001")) {
System.out.println(key);
}
for (String value : hashOperations.values("001")) {
System.out.println(value);
}
}
/**
* List类型的数据
*/
@Test
public void testList(){
ListOperations<String, String> listOperations = stringRedisTemplate.opsForList();
listOperations.leftPush("003","a");
listOperations.leftPushAll("003","b","c","d");
for (String s : listOperations.range("003", 0, -1)) {
System.out.println(s);
}
Long size = listOperations.size("003");
for (int i=0;i<size;i++){
String s = listOperations.rightPop("003");
System.out.println(s);
}
}
/**
* set类型的数据(特点是不可重复
*/
@Test
public void testSet(){
SetOperations<String, String> setOperations = stringRedisTemplate.opsForSet();
setOperations.add("myset","a","b","c","a");
Set<String> mySet = setOperations.members("myset");
for (String s : mySet) {
System.out.println(s);
}
setOperations.remove("myset","a","b");
mySet = setOperations.members("myset");
for (String s : mySet) {
System.out.println(s);
}
}
/**
* 测试ZSet类型的数据(可以根据分值排序
*/
@Test
public void testZSet(){
//存值
ZSetOperations<String, String> zSetOperations = stringRedisTemplate.opsForZSet();
zSetOperations.add("myzset2","a",10.0);
zSetOperations.add("myzset2","b",11.0);
zSetOperations.add("myzset2","c",12.0);
zSetOperations.add("myzset2","a",13.0);
//取值
for (String myzset : zSetOperations.range("myzset2", 0, -1)) {
System.out.println(myzset);
}
//增长分数
zSetOperations.incrementScore("myzset2","b",10);
//取值
for (String myzset : zSetOperations.range("myzset2", 0, -1)) {
System.out.println(myzset);
}
//删除
zSetOperations.remove("myzset2","a","b");
//取值
for (String myzset : zSetOperations.range("myzset2", 0, -1)) {
System.out.println(myzset);
}
}
/**
* 通用操作
*/
@Test
public void testCommon(){
//获取所有的key
for (String key : stringRedisTemplate.keys("*")) {
System.out.println(key);
}
//判断某个key是否存在
Boolean myset = stringRedisTemplate.hasKey("myset");
System.out.println(myset);
//返回某个key的类型
DataType myset1 = stringRedisTemplate.type("myset");
System.out.println(myset1.name());
//删除某个key
stringRedisTemplate.delete("myset");
}
}