spring boot整合redis ---- RedisTemplate 三分钟快速入门

huatechinfo

发布于 2020-12-30 13:40

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引入依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

RedisTemplate五种数据结构的操作

redisTemplate.opsForValue(); //操作字符串
redisTemplate.opsForHash(); //操作hash
redisTemplate.opsForList(); //操作list
redisTemplate.opsForSet(); //操作set
redisTemplate.opsForZSet(); //操作有序zset
RedisTemplate方法讲解
判断key是否存在
 /**
     * 判断key是否存在
     */
    @GetMapping("haskey")
    public boolean hasKey(String key) {
        return redisTemplate.hasKey(key);
    }

获取指定的key的失效时间

 /**
     * 指定key的失效时间
     */
    @GetMapping("expire")
    public void expire(String key, long time) {
        //参数一：key
        //参数二：睡眠时间
        //参数三：睡眠时间单位 TimeUnit.DAYS 天 TimeUnit.HOURS 小时 。。。
        redisTemplate.expire(key, time, TimeUnit.MINUTES);
    }

根据key获取过期时间

/**
     * 根据key获取过期时间
     */
    @GetMapping("getexpire")
    public long getExpire(String key) {
        Long expire = redisTemplate.getExpire(key);
        return expire;
    }

根据key删除reids中缓存数据

/**
     * 根据key删除reids中缓存数据
     */
    @GetMapping("delredisbykey")
    public void delete(String key) {
        redisTemplate.delete(key);
    }

保存和读取String

/**
     * 保存和读取String
     */
    @GetMapping("stringredisdemo")
    public String stringredisdemo() {
        //设置过期时间为1分钟
        redisTemplate.opsForValue().set("key1", "value1", 1, TimeUnit.MINUTES);
        redisTemplate.opsForValue().set("key2", "value2");
        redisTemplate.opsForValue().set("key3", "value3");
        //读取redis数据
        String result1 = redisTemplate.opsForValue().get("key1").toString();
        String result2 = redisTemplate.opsForValue().get("key2").toString();
        String result3 = redisTemplate.opsForValue().get("key3").toString();
        System.out.println("缓存结果为：result：" + result1 + "  " + result2 + "   " + result3);
        return "缓存结果为：result：" + result1 + "  " + result2 + "   " + result3;
    }

保存和读取list

/**
     * 保存和读取list
     */
    @GetMapping("listredisdemo")
    public String listredisdemo() {
        List<String> list1 = new ArrayList<>();
        list1.add("a1");
        list1.add("a2");
        list1.add("a3");
        List<String> list2 = new ArrayList<>();
        list2.add("b1");
        list2.add("b2");
        list2.add("b3");
        redisTemplate.opsForList().leftPush("listkey1", list1);
        redisTemplate.opsForList().rightPush("listkey2", list2);
        List<String> resultList1 = (List<String>) redisTemplate.opsForList().leftPop("listkey1");
        List<String> resultList2 = (List<String>) redisTemplate.opsForList().rightPop("listkey2");
        System.out.println("resultList1:" + resultList1);
        System.out.println("resultList2:" + resultList2);
        return "成功";
    }

Hash结构，保存和读取map

 /**
     * Hash结构，保存和读取map
     */
    @GetMapping("mapredisdemo")
    public String mapredisdemo() {
        Map<String, String> map = new HashMap<>();
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");
        map.put("key4", "value4");
        map.put("key5", "value5");
        redisTemplate.opsForHash().putAll("map1", map);
        Map<String, String> resultMap = redisTemplate.opsForHash().entries("map1");
        List<String> reslutMapList = redisTemplate.opsForHash().values("map1");
        Set<String> resultMapSet = redisTemplate.opsForHash().keys("map1");
        String value = (String) redisTemplate.opsForHash().get("map1", "key1");
        System.out.println("value:" + value);
        System.out.println("resultMapSet:" + resultMapSet);
        System.out.println("resultMap:" + resultMap);
        System.out.println("resulreslutMapListtMap:" + reslutMapList);
        return "成功";
    }

保存和读取Set

/**
     * 保存和读取Set
     */
    @GetMapping("setredisdemo")
    public String getredisdemo() {
        SetOperations<String, String> set = redisTemplate.opsForSet();
        set.add("key1", "value1");
        set.add("key1", "value2");
        set.add("key1", "value3");
        Set<String> resultSet = redisTemplate.opsForSet().members("key1");
        System.out.println("resultSet:" + resultSet);
        return "resultSet:" + resultSet;
    }

保存和读取zset

/**
     * 保存和读取zset
     */
    @GetMapping("zsetredisdemo")
    public String zsetredisdemo() {
        ZSetOperations.TypedTuple<Object> objectTypedTuple1 = new DefaultTypedTuple<>("zset-5", 9.6);
        ZSetOperations.TypedTuple<Object> objectTypedTuple2 = new DefaultTypedTuple<>("zset-6", 9.9);
        Set<ZSetOperations.TypedTuple<Object>> tuples = new HashSet<>();
        tuples.add(objectTypedTuple1);
        tuples.add(objectTypedTuple2);
        System.out.println(redisTemplate.opsForZSet().add("zset1", tuples));
        System.out.println(redisTemplate.opsForZSet().range("zset1", 0, -1));
        return "成功";
    }

完整示例代码

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.DefaultTypedTuple;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.SetOperations;
import org.springframework.data.redis.core.ZSetOperations;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.*;
import java.util.concurrent.TimeUnit;

@RestController
public class ReidsDemo {

    @Autowired
    RedisTemplate redisTemplate;

    /**
     * 指定key的失效时间
     */
    @GetMapping("expire")
    public void expire(String key, long time) {
        //参数一：key
        //参数二：睡眠时间
        //参数三：睡眠时间单位 TimeUnit.DAYS 天 TimeUnit.HOURS 小时 。。。
        redisTemplate.expire(key, time, TimeUnit.MINUTES);
    }

    /**
     * 根据key获取过期时间
     */
    @GetMapping("getexpire")
    public long getExpire(String key) {
        Long expire = redisTemplate.getExpire(key);
        return expire;
    }

    /**
     * 判断key是否存在
     */
    @GetMapping("haskey")
    public boolean hasKey(String key) {
        return redisTemplate.hasKey(key);
    }

    /**
     * 根据key删除reids中缓存数据
     */
    @GetMapping("delredisbykey")
    public void delete(String key) {
        redisTemplate.delete(key);
    }

    /**
     * 保存和读取String
     */
    @GetMapping("stringredisdemo")
    public String stringredisdemo() {
        //设置过期时间为1分钟
        redisTemplate.opsForValue().set("key1", "value1", 1, TimeUnit.MINUTES);
        redisTemplate.opsForValue().set("key2", "value2");
        redisTemplate.opsForValue().set("key3", "value3");
        //读取redis数据
        String result1 = redisTemplate.opsForValue().get("key1").toString();
        String result2 = redisTemplate.opsForValue().get("key2").toString();
        String result3 = redisTemplate.opsForValue().get("key3").toString();
        System.out.println("缓存结果为：result：" + result1 + "  " + result2 + "   " + result3);
        return "缓存结果为：result：" + result1 + "  " + result2 + "   " + result3;
    }

    /**
     * 保存和读取list
     */
    @GetMapping("listredisdemo")
    public String listredisdemo() {
        List<String> list1 = new ArrayList<>();
        list1.add("a1");
        list1.add("a2");
        list1.add("a3");
        List<String> list2 = new ArrayList<>();
        list2.add("b1");
        list2.add("b2");
        list2.add("b3");
        redisTemplate.opsForList().leftPush("listkey1", list1);
        redisTemplate.opsForList().rightPush("listkey2", list2);
        List<String> resultList1 = (List<String>) redisTemplate.opsForList().leftPop("listkey1");
        List<String> resultList2 = (List<String>) redisTemplate.opsForList().rightPop("listkey2");
        System.out.println("resultList1:" + resultList1);
        System.out.println("resultList2:" + resultList2);
        return "成功";
    }

    /**
     * Hash结构，保存和读取map
     */
    @GetMapping("mapredisdemo")
    public String mapredisdemo() {
        Map<String, String> map = new HashMap<>();
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");
        redisTemplate.opsForHash().putAll("map1", map);
        Map<String, String> resultMap = redisTemplate.opsForHash().entries("map1");
        List<String> reslutMapList = redisTemplate.opsForHash().values("map1");
        Set<String> resultMapSet = redisTemplate.opsForHash().keys("map1");
        String value = (String) redisTemplate.opsForHash().get("map1", "key1");
        System.out.println("value:" + value);
        System.out.println("resultMapSet:" + resultMapSet);
        System.out.println("resultMap:" + resultMap);
        System.out.println("resulreslutMapListtMap:" + reslutMapList);
        return "成功";
    }

    /**
     * 保存和读取Set
     */
    @GetMapping("setredisdemo")
    public String getredisdemo() {
        SetOperations<String, String> set = redisTemplate.opsForSet();
        set.add("key1", "value1");
        set.add("key1", "value2");
        set.add("key1", "value3");
        Set<String> resultSet = redisTemplate.opsForSet().members("key1");
        System.out.println("resultSet:" + resultSet);
        return "resultSet:" + resultSet;
    }

    /**
     * 保存和读取zset
     */
    @GetMapping("zsetredisdemo")
    public String zsetredisdemo() {
        ZSetOperations.TypedTuple<Object> objectTypedTuple1 = new DefaultTypedTuple<>("zset-5", 9.6);
        ZSetOperations.TypedTuple<Object> objectTypedTuple2 = new DefaultTypedTuple<>("zset-6", 9.9);
        Set<ZSetOperations.TypedTuple<Object>> tuples = new HashSet<>();
        tuples.add(objectTypedTuple1);
        tuples.add(objectTypedTuple2);
        System.out.println(redisTemplate.opsForZSet().add("zset1", tuples));
        System.out.println(redisTemplate.opsForZSet().range("zset1", 0, -1));
        return "成功";
    }

}

序列化
直接粘贴在项目中即可

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.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

/*
*序列化
 */
@Configuration
public class MyRedisConfig {

    @Bean(name = "redisTemplate")
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory){
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        //参照StringRedisTemplate内部实现指定序列化器
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        redisTemplate.setKeySerializer(keySerializer());
        redisTemplate.setHashKeySerializer(keySerializer());
        redisTemplate.setValueSerializer(valueSerializer());
        redisTemplate.setHashValueSerializer(valueSerializer());
        return redisTemplate;
    }

    private RedisSerializer<String> keySerializer(){
        return new StringRedisSerializer();
    }

    //使用Jackson序列化器
    private RedisSerializer<Object> valueSerializer(){
        return new GenericJackson2JsonRedisSerializer();
    }

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spring boot整合redis ---- RedisTemplate 三分钟快速入门

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