程序結(jié)構(gòu)：

一、配置 1. 在pom.xml中添加依賴

pom.xml文件如下：

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd'> <modelVersion>4.0.0</modelVersion> <groupId>com.lyy</groupId> <artifactId>redis-test</artifactId> <version>0.1-SNAPSHOT</version> <parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.1.RELEASE</version><!--始終從倉(cāng)庫(kù)中獲取--><!--<relativePath/>--> </parent> <dependencies><!--web應(yīng)用基本環(huán)境，如mvc--><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId></dependency> <!--redis包--><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId></dependency> </dependencies></project>

其中，spring-boot-starter-web包含springmvc。

2. 配置application.yml

application.yml文件如下：

server: port: 11011 servlet: context-path: /api/v1 spring: redis: # Redis數(shù)據(jù)庫(kù)索引（默認(rèn)為0） database: 0 # Redis服務(wù)器地址 host: 127.0.0.1 # Redis服務(wù)器連接端口 port: 6379# Redis服務(wù)器連接密碼（默認(rèn)為空）# password: 1234563. 通過(guò)配置類，設(shè)置redis

RedisConfig類如下：

package com.apollo.config; import com.fasterxml.jackson.databind.ObjectMapper;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.cache.annotation.EnableCaching;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.Jackson2JsonRedisSerializer;import org.springframework.data.redis.serializer.StringRedisSerializer; /** * @author ：apollo * @since ：Created in 2019/2/22 */@Configuration@EnableCachingpublic class RedisConfig { @Autowired private ObjectMapper objectMapper; /** * 自定義springSessionDefaultRedisSerializer對(duì)象，將會(huì)替代默認(rèn)的SESSION序列化對(duì)象。 * 默認(rèn)是JdkSerializationRedisSerializer，缺點(diǎn)是需要類實(shí)現(xiàn)Serializable接口。 * 并且在反序列化時(shí)如果異常會(huì)拋出SerializationException異常， * 而SessionRepositoryFilter又沒(méi)有處理異常，故如果序列化異常時(shí)就會(huì)導(dǎo)致請(qǐng)求異常 */ @Bean(name = 'springSessionDefaultRedisSerializer') public GenericJackson2JsonRedisSerializer getGenericJackson2JsonRedisSerializer() {return new GenericJackson2JsonRedisSerializer(); } /** * JacksonJsonRedisSerializer和GenericJackson2JsonRedisSerializer的區(qū)別： * GenericJackson2JsonRedisSerializer在json中加入@class屬性，類的全路徑包名，方便反系列化。 * JacksonJsonRedisSerializer如果存放了List則在反系列化的時(shí)候， * 如果沒(méi)指定TypeReference則會(huì)報(bào)錯(cuò)java.util.LinkedHashMap cannot be cast。 */ @Bean public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory connectionFactory) {RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();redisTemplate.setConnectionFactory(connectionFactory); // 使用Jackson2JsonRedisSerialize 替換默認(rèn)序列化Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class); jackson2JsonRedisSerializer.setObjectMapper(objectMapper);// 設(shè)置value的序列化規(guī)則和 key的序列化規(guī)則redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);redisTemplate.setKeySerializer(new StringRedisSerializer()); redisTemplate.setHashKeySerializer(jackson2JsonRedisSerializer);redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer); redisTemplate.setDefaultSerializer(jackson2JsonRedisSerializer);redisTemplate.setEnableDefaultSerializer(true);redisTemplate.afterPropertiesSet();return redisTemplate; }}二、邏輯代碼1. 程序入口

package com.apollo; import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication; /** * @author ：apollo * @since ：Created in 2019/2/22 */@SpringBootApplicationpublic class Application { public static void main(String[] args) {SpringApplication.run(Application.class, args); }}2. 實(shí)體類

實(shí)體類Animal如下：

package com.apollo.bean; /** * @author ：apollo * @since ：Created in 2019/2/22 */public class Animal { private Integer weight; private Integer height; private String name; public Animal(Integer weight, Integer height, String name) {this.weight = weight;this.height = height;this.name = name; } ……這里是get、set方法}3. 公共返回類

package com.apollo.common; /** * @author ：apollo * @since ：Created in 2019/2/22 */public class ApiResult { public static final Integer STATUS_SUCCESS = 0; public static final Integer STATUS_FAILURE = -1; public static final String DESC_SUCCESS = '操作成功'; public static final String DESC_FAILURE = '操作失敗'; private Integer status; private String desc; private Object result; private ApiResult() {} private ApiResult(Integer status, String desc, Object result) {this.status = status;this.desc = desc;this.result = result; } //這個(gè)方法和Builder設(shè)計(jì)模式二選一即可，功能是重復(fù)的 public static ApiResult success(Object result) {return success(DESC_SUCCESS, result); } //同上 public static ApiResult success(String desc, Object result) {return new ApiResult(STATUS_SUCCESS, desc, result); } //同上 public static ApiResult failure(Integer status) {return failure(status, null); } //同上 public static ApiResult failure(Integer status, String desc) {return failure(status, desc, null); } //同上 public static ApiResult failure(Integer status, String desc, Object result) {return new ApiResult(status, desc, result); } public static Builder builder() {return new Builder(); } //靜態(tài)內(nèi)部類，這里使用Builder設(shè)計(jì)模式 public static class Builder {private Integer status;private String desc;private Object result; public Builder status(Integer status) { this.status = status; return this;} public Builder desc(String desc) { this.desc = desc; return this;} public Builder result(Object result) { this.result = result; return this;} public ApiResult build() { return new ApiResult(status, desc, result);} } ……這里是get、set方法，這里的方法一定不能少，否則返回時(shí)無(wú)法將對(duì)象序列化}4. 請(qǐng)求處理Controller

RedisController類如下：

package com.apollo.controller; import com.apollo.bean.Animal;import com.apollo.common.ApiResult;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.web.bind.annotation.*; import java.util.HashMap;import java.util.Map; /** * @author ：apollo * @since ：Created in 2019/2/22 */@RestController@RequestMapping(value = '/redis')public class RedisController { @Autowired private RedisTemplate<String, Object> redisTemplate; /** * 測(cè)試向redis中添加數(shù)據(jù) * @param id * @return */ @GetMapping(value = '/{id}') public ApiResult addData2Redis(@PathVariable('id') Integer id) { redisTemplate.opsForValue().set('first', id);redisTemplate.opsForValue().set('second', 'hello world');redisTemplate.opsForValue().set('third',new Animal(100, 200, '二狗子')); return ApiResult.builder().status(ApiResult.STATUS_SUCCESS).desc('添加成功').build(); } /** * 測(cè)試從redis中獲取數(shù)據(jù) * @return */ @GetMapping('/redis-data') public ApiResult getRedisData() {Map<String, Object> result = new HashMap<>();result.put('first', redisTemplate.opsForValue().get('first'));result.put('second', redisTemplate.opsForValue().get('second'));result.put('third', redisTemplate.opsForValue().get('third')); return ApiResult.builder().status(ApiResult.STATUS_SUCCESS).desc('獲取成功').result(result).build(); }}

注意：這里是返回ApiResult對(duì)象，需要將返回的對(duì)象序列化，所以ApiResult中的get/set方法是必須的，否則會(huì)報(bào)錯(cuò)：HttpMessageNotWritableException: No converter found for return value of type: class com.apollo.common.ApiResult，找不到ApiResult類型的轉(zhuǎn)換器。

三、測(cè)試1. 測(cè)試添加

使用postman請(qǐng)求http://localhost:11011/api/v1/redis/5，返回結(jié)果：

{ 'status': 0, 'desc': '添加成功', 'result': null}

登錄到redis，使用命令dbsize查看存儲(chǔ)的數(shù)據(jù)量：

數(shù)據(jù)量為3，對(duì)應(yīng)我們上邊程序中的3步操作。

2. 測(cè)試獲取

使用postman請(qǐng)求http://localhost:11011/api/v1/redis/redis-data，返回結(jié)果：

{ 'status': 0, 'desc': '獲取成功', 'result': {'third': { 'weight': 100, 'height': 200, 'name': '二狗子'},'first': 5,'second': 'hello world' }}

與我們之前存入的數(shù)據(jù)對(duì)比，是正確的。

四、代碼地址

github地址：https://github.com/myturn0/redis-test.git

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