14.Redis之JAVASpring客户端

1.引入依赖

此时就会引入操作 redis 的依赖了~~ 

2.yml配置

spring:  redis:    host: 127.0.0.1    port: 8888

3.准备

• 前面使用 jedis,是通过 Jedis 对象里的各种方法来操作 redis 的.
• 此处Spring 中则是通过 StringRedisTemplate 来操作 redis .
• 最原始提供的类是 RedisTemplate
• StringRedisTemplate 是 RedisTemplate 的子类, 专门用来处理 文本数据的
• 这个类提供的方法,相比于之前的 Jedis 中的各种方法,还是存在较大的差异的!!

• 4.代码 

  import org.springframework.beans.factory.annotation.Autowired;import org.springframework.data.redis.connection.RedisConnection;import org.springframework.data.redis.core.StringRedisTemplate;import org.springframework.data.redis.core.ZSetOperations;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.bind.annotation.RestController;import java.util.Set;// 后续 redis 测试的各种方法, 都通过这个 Controller 提供的 http 接口来触发.@RestControllerpublic class MyController {    @Autowired    private StringRedisTemplate redisTemplate;    @GetMapping("/testString")    @ResponseBody    public String testString() {        redisTemplate.execute((RedisConnection connection) -> {            // execute 要求回调方法中必须写 return 语句. 返回个东西.            // 这个回调返回的对象, 就会作为 execute 本身的返回值.            connection.flushAll();            return null;        });        redisTemplate.opsForValue().set("key", "111");        redisTemplate.opsForValue().set("key2", "222");        redisTemplate.opsForValue().set("key3", "333");        String value = redisTemplate.opsForValue().get("key");        System.out.println("value: " + value);        return "OK";    }    @GetMapping("/testList")    @ResponseBody    public String testList() {        // 先清除之前的数据.        redisTemplate.execute((RedisConnection connection) -> {            // execute 要求回调方法中必须写 return 语句. 返回个东西.            // 这个回调返回的对象, 就会作为 execute 本身的返回值.            connection.flushAll();            return null;        });        redisTemplate.opsForList().leftPush("key", "111");        redisTemplate.opsForList().leftPush("key", "222");        redisTemplate.opsForList().leftPush("key", "333");        String value = redisTemplate.opsForList().rightPop("key");        System.out.println("value: " + value);        value = redisTemplate.opsForList().rightPop("key");        System.out.println("value: " + value);        value = redisTemplate.opsForList().rightPop("key");        System.out.println("value: " + value);        return "OK";    }    @GetMapping("/testSet")    @ResponseBody    public String testSet() {        redisTemplate.execute((RedisConnection connection) -> {            connection.flushAll();            return null;        });        redisTemplate.opsForSet().add("key", "111", "222", "333");        Set result = redisTemplate.opsForSet().members("key");        System.out.println("result: " + result);        Boolean exists = redisTemplate.opsForSet().isMember("key", "111");        System.out.println("exists: " + exists);        Long count = redisTemplate.opsForSet().size("key");        System.out.println("count: " + count);        redisTemplate.opsForSet().remove("key", "111", "222");        result = redisTemplate.opsForSet().members("key");        System.out.println("result: " + result);        return "OK";    }    @GetMapping("/testHash")    @ResponseBody    public String testHash() {        redisTemplate.execute((RedisConnection connection) -> {            connection.flushAll();            return null;        });        redisTemplate.opsForHash().put("key", "f1", "111");        redisTemplate.opsForHash().put("key", "f2", "222");        redisTemplate.opsForHash().put("key", "f3", "333");        String value = (String) redisTemplate.opsForHash().get("key", "f1");        System.out.println("value: " + value);        Boolean exists = redisTemplate.opsForHash().hasKey("key", "f1");        System.out.println("exists: " + exists);        redisTemplate.opsForHash().delete("key", "f1", "f2");        Long size = redisTemplate.opsForHash().size("key");        System.out.println("size: " + size);        return "OK";    }    @GetMapping("/testZSet")    @ResponseBody    public String testZSet() {        redisTemplate.execute((RedisConnection connection) -> {            connection.flushAll();            return null;        });        redisTemplate.opsForZSet().add("key", "zhangsan", 10);        redisTemplate.opsForZSet().add("key", "lisi", 20);        redisTemplate.opsForZSet().add("key", "wangwu", 30);        Set members = redisTemplate.opsForZSet().range("key", 0, -1);        System.out.println("members: " + members);        Set membersWithScore = redisTemplate.opsForZSet().rangeWithScores("key", 0, -1);        System.out.println("membersWithScore: " + membersWithScore);        Double score = redisTemplate.opsForZSet().score("key", "zhangsan");        System.out.println("score: " + score);        redisTemplate.opsForZSet().remove("key", "zhangsan");        Long size = redisTemplate.opsForZSet().size("key");        System.out.println("size: " + size);        Long rank = redisTemplate.opsForZSet().rank("key", "lisi");        System.out.println("rank: " + rank);        return "OK";    }}

  5.测试

  Spring Data Redis 中文文档 (springdoc.cn)