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本篇內(nèi)容主要講解“SpringBoot2整合Redis實(shí)現(xiàn)讀寫(xiě)操作的方法”,感興趣的朋友不妨來(lái)看看。本文介紹的方法操作簡(jiǎn)單快捷,實(shí)用性強(qiáng)。下面就讓小編來(lái)帶大家學(xué)習(xí)“SpringBoot2整合Redis實(shí)現(xiàn)讀寫(xiě)操作的方法”吧!
1. 啟動(dòng) Redis Server
2. 工程實(shí)例
2.1 工程目錄
2.2 pom.xml
2.3 Java 源文件
3. 測(cè)試
4. 問(wèn)題
啟動(dòng) redis server,如下圖所示,端口號(hào) 6379:
工程目錄如下圖所示:
引入依賴:
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency>
完整 pom.xml 如下所示:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.2.2.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.syrdbt</groupId> <artifactId>redis-study</artifactId> <version>0.0.1-SNAPSHOT</version> <name>redis-study</name> <description>Demo project for Spring Boot</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
啟動(dòng)類,RedisStudyApplication.java:
package com.syrdbt.redis.study; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class RedisStudyApplication { public static void main(String[] args) { SpringApplication.run(RedisStudyApplication.class, args); } }
控制器,RedisStudyController.java:
這里使用 SpringBoot 內(nèi)置的與 Redis 的工具類:RedisTemplate;
除了 RedisTemplate,SpringBoot 還內(nèi)置了 StringRedisTemplate ;
StringRedisTemplate 只能對(duì) key=String,value=String 的鍵值對(duì)進(jìn)行操作,RedisTemplate 可以對(duì)任何類型的 key-value 鍵值對(duì)操作;StringRedisTemplate 繼承了 RedisTemplate。
package com.syrdbt.redis.study.controller; import com.sun.tools.javac.code.Attribute; import com.syrdbt.redis.study.constant.Constant; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import java.io.Console; /** * @author syrdbt */ @RestController public class RedisStudyController { @Autowired private RedisTemplate redisTemplate; /** * 通過(guò) key 獲取字符串 */ @GetMapping("/redis/get") public String visitStringByKey(@RequestParam String key) { return (String) redisTemplate.opsForValue().get(Constant.NAMESPACE + ":" + key); } /** * 在 redis 中設(shè)置 key/value */ @GetMapping("/redis/set") public String visitStringByKey(@RequestParam String key, @RequestParam String value) { try { redisTemplate.opsForValue().set(Constant.NAMESPACE + ":" + key, value); } catch (Exception e) { return "error"; } return "success"; } }
redis 配置類,RedisConfig.java :
package com.syrdbt.redis.study.config; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.data.redis.serializer.GenericToStringSerializer; import org.springframework.data.redis.serializer.RedisSerializer; import org.springframework.data.redis.serializer.StringRedisSerializer; /** * redis 配置類 * * @author syrdbt */ @Configuration public class RedisConfig { private final RedisTemplate redisTemplate; @Autowired public RedisConfig(RedisTemplate redisTemplate) { this.redisTemplate = redisTemplate; } @Bean @SuppressWarnings("unchecked") public RedisTemplate<String, Object> redisTemplate() { RedisSerializer<String> stringSerializer = new StringRedisSerializer(); RedisSerializer<Object> jsonString = new GenericToStringSerializer<>(Object.class); redisTemplate.setKeySerializer(stringSerializer); redisTemplate.setValueSerializer(jsonString); redisTemplate.setHashKeySerializer(stringSerializer); redisTemplate.setHashValueSerializer(jsonString); return redisTemplate; } }
常量類用作 redis key 的前綴,Constant.java:
package com.syrdbt.redis.study.constant; /** * @author syrdbt * @date 2019-12-10 */ public class Constant { public static final String NAMESPACE = "REDIS-STUDY"; }
寫(xiě)操作,訪問(wèn) http://localhost:8080/redis/set?key=name&value=syrdbt 。
讀操作,訪問(wèn)http://localhost:8080/redis/get?key=name
整合 redis 的寫(xiě)入和讀出的實(shí)例已經(jīng)完成了。
不過(guò)還有 2 個(gè)問(wèn)題:
我沒(méi)并沒(méi)有設(shè)置主機(jī)號(hào)、端口號(hào)、用戶名、密碼就訪問(wèn)了 redis,顯然 SpringBoot 默認(rèn)配置了這些,我本機(jī)的redis下載之后沒(méi)有修改密碼等配置,所以才可以訪問(wèn)。
正常境況下,不應(yīng)該直接使用 redisTmplate,應(yīng)該封裝成工具類,這樣方便大家使用。
到此,相信大家對(duì)“SpringBoot2整合Redis實(shí)現(xiàn)讀寫(xiě)操作的方法”有了更深的了解,不妨來(lái)實(shí)際操作一番吧!這里是億速云網(wǎng)站,更多相關(guān)內(nèi)容可以進(jìn)入相關(guān)頻道進(jìn)行查詢,關(guān)注我們,繼續(xù)學(xué)習(xí)!
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