瑞吉实战22-Redis开发
瑞吉实战22–Redis(Jedis&SpringDataRedis)
实验内容
- 关于redis相关api可以查看菜鸟教程的相关章节
- jedis的操作非常接近原生的cmd操作,所以相关参数可以直接对照redis的api说明!
- 实验仅罗列常用api,非完整测试,可根据实际需要去查询即可。
一、开发环境配置
源码存放于个人github中,4575252/JedisTest: 应用jedis api进行常用api测试 (github.com)
创建java的maven工程,采用org.apache.maven.archetypes:maven-archetype-quickstart
骨架,仅带有junit~
其中相关maven坐标如下:
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.8.0</version>
</dependency>
<!-- 方便做集合比对 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-collections4</artifactId>
<version>4.3</version>
</dependency>
<!-- 应用@Log注解,方便做日志输出 -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
</dependency>
junit测试框架
这里应用junit的框架,在测试前后管理redis的连接请求和释放
package org.example;
import lombok.extern.java.Log;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.ListUtils;
import org.apache.commons.collections4.SetUtils;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import redis.clients.jedis.Jedis;
import javax.swing.*;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import static org.junit.Assert.*;
/***
* @description: 测试Jedis操作api,应用于String、Hash、List、Set、ZSet的五种常见应用
* @return:
* @author: eric 4575252@gmail.com
* @date: 2022-09-28, 周三, 9:23
*/
@Log
public class AppTest {
private Jedis jedis;
@Before
public void setUp() throws Exception {
jedis = new Jedis("192.168.20.147", 6379);
jedis.auth("123456");
}
@After
public void tearDown() throws Exception {
//3 关闭连接
jedis.close();
jedis = null;
}
}
二、测试string的日常操作
/**
* @description: 测试jedis操作string对象的常见操作,主要有存取、删除、过期设置
* @return: void
* @author: eric 4575252@gmail.com
* @date: 2022-09-28, 周三, 9:16
*/
@Test
public void testRedisStringAPI() {
// 数据准备
jedis.flushDB();
//1、set&get
jedis.set("username", "zhangsan");
assertEquals(jedis.get("username"),"zhangsan");
//2、set超时验证
/* 第三个参数nxxx,nx为不存在才set,xx为存在才set
* 第四个参数expx,ex为秒,px为毫秒
*/
jedis.set("timeout", "yes", "nx", "ex", 1);
for (int i = 0; i < 10; i++) {
//瞬时取10次,现有cpu设置应该能在1秒内跑完
assertEquals(jedis.get("timeout"),"yes");
}
try {
Thread.sleep(1000); //休眠一秒
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
assertNull(jedis.get("timeout")); //过期应为null
//3、删除字段后验证是否
jedis.del("username");
assertNull(jedis.get("username"));
}
三、测试hash类型数据的日常操作
/**
* @description: 测试jedis操作string对象的常见操作,主要有存取、删除、过期设置
* @return: void
* @author: eric 4575252@gmail.com
* @date: 2022-09-28, 周三, 9:16
*/
@Test
public void testRedisStringAPI() {
//1、set&get
jedis.set("username", "zhangsan");
assertEquals(jedis.get("username"),"zhangsan");
//2、set超时验证
/* 第三个参数nxxx,nx为不存在才set,xx为存在才set
* 第四个参数expx,ex为秒,px为毫秒
*/
jedis.set("timeout", "yes", "nx", "ex", 1);
for (int i = 0; i < 10; i++) {
//瞬时取10次,现有cpu设置应该能在1秒内跑完
assertEquals(jedis.get("timeout"),"yes");
}
try {
Thread.sleep(1000); //休眠一秒
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
assertNull(jedis.get("timeout")); //过期应为null
//3、删除字段后验证是否
jedis.del("username");
assertNull(jedis.get("username"));
}
四、测试list类型数据的日常操作
@Test
public void testRedisListAPI() {
// 数据准备
jedis.flushDB();
jedis.rpush("names", "唐僧");
jedis.rpush("names", "悟空");
jedis.rpush("names", "八戒");
jedis.rpush("names", "悟净");
// 1、测试list的数据顺序是否一致
assertTrue(ListUtils.isEqualList(jedis.lrange("names", 0, -1), Stream.of("唐僧", "悟空", "八戒", "悟净").collect(Collectors.toList())));
// 2、测试list长度
assertTrue(jedis.llen("names") == 4l);
// 数据准备
jedis.flushDB();
jedis.lpush("scores", "99"); //lpush是从左侧、头部压入
jedis.lpush("scores", "100");
jedis.lpush("scores", "55");
// 3、排序校验
assertTrue(ListUtils.isEqualList(jedis.sort("scores"), Stream.of("55", "99", "100").collect(Collectors.toList())));
// 4、校验移除动作,移除头部一个元素
jedis.lpop("scores");
assertTrue(ListUtils.isEqualList(jedis.lrange("scores",0,-1), Stream.of("100", "99").collect(Collectors.toList())));
// 5、修改列表中单个值
jedis.lset("scores", 0, "66");
assertTrue(ListUtils.isEqualList(jedis.lrange("scores",0,-1), Stream.of("66", "99").collect(Collectors.toList())));
// 6、获取列表指定下标的值
System.out.println(jedis.lindex("scores", 1));
assertEquals(jedis.lindex("scores", 0), "66");
// 删除列表指定下标的值
System.out.println(jedis.lrange("scores",0,-1));
System.out.println(jedis.lrem("scores", 2, "99")); //count为0则全部删除匹配的值,大于0从左往右比对,小于零从右往左,绝对值就是删除的数量。
System.out.println(jedis.lrange("scores",0,-1));
}
五、补充SpringDataRedis操作
源码存放于个人github中: 4575252/SpringDataRedisTest: 基于SpringDataRedis下的redisTemplate操作5种常见数据类型 (github.com)
在springboot工程中,采用springdataRedis组件,应用redisTemplate模板操作redis是非常容易的,以下是过程:
1、maven坐标
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
2、application.yml配置信息
spring:
application:
name: springdataredis_demo
#Redis相关配置 1234
redis:
host: 192.168.20.147
port: 6379
password: 123456
database: 0 #操作的是0号数据库
jedis:
#Redis连接池配置
pool:
max-active: 8 #最大连接数
max-wait: 1ms #连接池最大阻塞等待时间
max-idle: 4 #连接池中的最大空闲连接
min-idle: 0 #连接池中的最小空闲连接
3、redisConfig配置类
这里替换了key序列化器,方便redis客户端查看key信息,而不是显示uicode, 如 \xac\xed\x00
package com.iyyxx.springdataredistest.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.StringRedisSerializer;
/**
* @className: RedisConfig
* @description: TODO 类描述
* @author: eric 4575252@gmail.com
* @date: 2022/9/28/0028 12:03:32
**/
@Configuration
public class RedisConfig {
@Bean
public RedisTemplate<Object, Object>
redisTemplate(RedisConnectionFactory connectionFactory) {
RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
//默认的Key序列化器为:JdkSerializationRedisSerializer
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
redisTemplate.setConnectionFactory(connectionFactory);
return redisTemplate;
}
}
4、测试类
对string、hash、list、set、zset五种数据类型,和通用操作方法共6中常见操作做了演示!
package com.iyyxx.springdataredistest;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
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 java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
@SpringBootTest
class SpringDataRedisTestApplicationTests {
@Autowired
private RedisTemplate redisTemplate;
@BeforeEach
void setUp() {
redisTemplate.getConnectionFactory().getConnection().flushDb();
}
@AfterEach
void tearDown() {
// redisTemplate.getConnectionFactory().getConnection().flushDb();
}
/**
* 操作String类型数据
*/
@Test
public void testString() {
//存值
redisTemplate.opsForValue().set("city123", "beijing");
//取值
String value = (String) redisTemplate.opsForValue().get("city123");
System.out.println(value);
//存值,同时设置过期时间
redisTemplate.opsForValue().set("key1", "value1", 10l, TimeUnit.SECONDS);
//存值,如果存在则不执行任何操作
Boolean aBoolean = redisTemplate.opsForValue().setIfAbsent("city1234", "nanjing");
System.out.println(aBoolean);
}
/**
* 操作Hash类型数据
*/
@Test
public void testHash() {
HashOperations hashOperations = redisTemplate.opsForHash();
//存值
hashOperations.put("002", "name", "xiaoming");
hashOperations.put("002", "age", "20");
hashOperations.put("002", "address", "bj");
//取值
String age = (String) hashOperations.get("002", "age");
System.out.println(age);
//获得hash结构中的所有字段
Set keys = hashOperations.keys("002");
for (Object key : keys) {
System.out.println(key);
}
//获得hash结构中的所有值
List values = hashOperations.values("002");
for (Object value : values) {
System.out.println(value);
}
}
/**
* 操作List类型的数据
*/
@Test
public void testList() {
ListOperations listOperations = redisTemplate.opsForList();
//存值
listOperations.leftPush("mylist", "a");
listOperations.leftPushAll("mylist", "b", "c", "d");
//取值
List<String> mylist = listOperations.range("mylist", 0, -1);
for (String value : mylist) {
System.out.println(value);
}
//获得列表长度 llen
Long size = listOperations.size("mylist");
int lSize = size.intValue();
for (int i = 0; i < lSize; i++) {
//出队列
String element = (String) listOperations.rightPop("mylist");
System.out.println(element);
}
}
/**
* 操作Set类型的数据
*/
@Test
public void testSet() {
SetOperations setOperations = redisTemplate.opsForSet();
//存值
setOperations.add("myset", "a", "b", "c", "a");
//取值
Set<String> myset = setOperations.members("myset");
for (String o : myset) {
System.out.println(o);
}
//删除成员
setOperations.remove("myset", "a", "b");
//取值
myset = setOperations.members("myset");
for (String o : myset) {
System.out.println(o);
}
}
/**
* 操作ZSet类型的数据
*/
@Test
public void testZset() {
ZSetOperations zSetOperations = redisTemplate.opsForZSet();
//存值
zSetOperations.add("myZset", "a", 10.0);
zSetOperations.add("myZset", "b", 11.0);
zSetOperations.add("myZset", "c", 12.0);
zSetOperations.add("myZset", "a", 13.0);
//取值
Set<String> myZset = zSetOperations.range("myZset", 0, -1);
for (String s : myZset) {
System.out.println(s);
}
//修改分数
zSetOperations.incrementScore("myZset", "b", 20.0);
//取值
myZset = zSetOperations.range("myZset", 0, -1);
for (String s : myZset) {
System.out.println(s);
}
//删除成员
zSetOperations.remove("myZset", "a", "b");
//取值
myZset = zSetOperations.range("myZset", 0, -1);
for (String s : myZset) {
System.out.println(s);
}
}
/**
* 通用操作,针对不同的数据类型都可以操作
*/
@Test
public void testCommon() {
//获取Redis中所有的key
Set<String> keys = redisTemplate.keys("*");
for (String key : keys) {
System.out.println(key);
}
//判断某个key是否存在
Boolean itcast = redisTemplate.hasKey("city1234");
System.out.println(itcast);
//删除指定key
redisTemplate.delete("myZset");
//获取指定key对应的value的数据类型
DataType dataType = redisTemplate.type("myset");
System.out.println(dataType.name());
}
}
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