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這篇文章將為大家詳細(xì)講解有關(guān)如何解析SpringBoot整合SpringCache及Redis過(guò)程,文章內(nèi)容質(zhì)量較高,因此小編分享給大家做個(gè)參考,希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。
1.安裝redis
a.由于官方是沒(méi)有Windows版的,所以我們需要下載微軟開(kāi)發(fā)的redis,網(wǎng)址:
https://github.com/MicrosoftArchive/redis/releases
b.解壓后,在redis根目錄打開(kāi)cmd界面,輸入:redis-server.exe redis.windows.conf,啟動(dòng)redis(關(guān)閉cmd窗口即停止)
2.使用
a.創(chuàng)建SpringBoot工程,選擇maven依賴(lài)
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> ..... </dependencies>
b.配置 application.yml 配置文件
server: port: 8080spring: # redis相關(guān)配置 redis: database: 0 host: localhost port: 6379 password: jedis: pool: # 連接池最大連接數(shù)(使用負(fù)值表示沒(méi)有限制) max-active: 8 # 連接池最大阻塞等待時(shí)間(使用負(fù)值表示沒(méi)有限制) max-wait: -1ms # 連接池中的最大空閑連接 max-idle: 5 # 連接池中的最小空閑連接 min-idle: 0 # 連接超時(shí)時(shí)間(毫秒)默認(rèn)是2000ms timeout: 2000ms # thymeleaf熱更新 thymeleaf: cache: false
c.創(chuàng)建RedisConfig配置類(lèi)
@Configuration@EnableCaching //開(kāi)啟緩存public class RedisConfig { /** * 緩存管理器 * @param redisConnectionFactory * @return */ @Bean public RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) { // 生成一個(gè)默認(rèn)配置,通過(guò)config對(duì)象即可對(duì)緩存進(jìn)行自定義配置 RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig(); // 設(shè)置緩存的默認(rèn)過(guò)期時(shí)間,也是使用Duration設(shè)置 config = config.entryTtl(Duration.ofMinutes(30)) // 設(shè)置 key為string序列化 .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer())) // 設(shè)置value為json序列化 .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer())) // 不緩存空值 .disableCachingNullValues(); // 對(duì)每個(gè)緩存空間應(yīng)用不同的配置 Map<String, RedisCacheConfiguration> configMap = new HashMap<>(); configMap.put("userCache", config.entryTtl(Duration.ofSeconds(60))); // 使用自定義的緩存配置初始化一個(gè)cacheManager RedisCacheManager cacheManager = RedisCacheManager.builder(redisConnectionFactory) //默認(rèn)配置 .cacheDefaults(config) // 特殊配置(一定要先調(diào)用該方法設(shè)置初始化的緩存名,再初始化相關(guān)的配置) .initialCacheNames(configMap.keySet()) .withInitialCacheConfigurations(configMap) .build(); return cacheManager; } /** * Redis模板類(lèi)redisTemplate * @param factory * @return */ @Bean public RedisTemplate redisTemplate(RedisConnectionFactory factory) { RedisTemplate<String, Object> template = new RedisTemplate<>(); template.setConnectionFactory(factory); // key采用String的序列化方式 template.setKeySerializer(new StringRedisSerializer()); // hash的key也采用String的序列化方式 template.setHashKeySerializer(new StringRedisSerializer()); // value序列化方式采用jackson template.setValueSerializer(jackson2JsonRedisSerializer()); // hash的value序列化方式采用jackson template.setHashValueSerializer(jackson2JsonRedisSerializer()); return template; } /** * json序列化 * @return */ private RedisSerializer<Object> jackson2JsonRedisSerializer() { //使用Jackson2JsonRedisSerializer來(lái)序列化和反序列化redis的value值 Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<>(Object.class); //json轉(zhuǎn)對(duì)象類(lèi),不設(shè)置默認(rèn)的會(huì)將json轉(zhuǎn)成hashmap ObjectMapper mapper = new ObjectMapper(); mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); serializer.setObjectMapper(mapper); return serializer; }}
d.創(chuàng)建entity實(shí)體類(lèi)
public class User implements Serializable { private int id; private String userName; private String userPwd; public User(){} public User(int id, String userName, String userPwd) { this.id = id; this.userName = userName; this.userPwd = userPwd; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getUserPwd() { return userPwd; } public void setUserPwd(String userPwd) { this.userPwd = userPwd; }}
e.創(chuàng)建Service
@Servicepublic class UserService { //查詢(xún):先查緩存是是否有,有則直接取緩存中數(shù)據(jù),沒(méi)有則運(yùn)行方法中的代碼并緩存 @Cacheable(value = "userCache", key = "'user:' + #userId") public User getUser(int userId) { System.out.println("執(zhí)行此方法,說(shuō)明沒(méi)有緩存"); return new User(userId, "用戶(hù)名(get)_" + userId, "密碼_" + userId); } //添加:運(yùn)行方法中的代碼并緩存 @CachePut(value = "userCache", key = "'user:' + #user.id") public User addUser(User user){ int userId = user.getId(); System.out.println("添加緩存"); return new User(userId, "用戶(hù)名(add)_" + userId, "密碼_" + userId); } //刪除:刪除緩存 @CacheEvict(value = "userCache", key = "'user:' + #userId") public boolean deleteUser(int userId){ System.out.println("刪除緩存"); return true; } @Cacheable(value = "common", key = "'common:user:' + #userId") public User getCommonUser(int userId) { System.out.println("執(zhí)行此方法,說(shuō)明沒(méi)有緩存(測(cè)試公共配置是否生效)"); return new User(userId, "用戶(hù)名(common)_" + userId, "密碼_" + userId); }}
f.創(chuàng)建Controller
@RestController@RequestMapping("/user")public class UserController { @Resource private UserService userService; @RequestMapping("/getUser") public User getUser(int userId) { return userService.getUser(userId); } @RequestMapping("/addUser") public User addUser(User user){ return userService.addUser(user); } @RequestMapping("/deleteUser") public boolean deleteUser(int userId){ return userService.deleteUser(userId); } @RequestMapping("/getCommonUser") public User getCommonUser(int userId) { return userService.getCommonUser(userId); }}
@Controllerpublic class HomeController { //默認(rèn)頁(yè)面 @RequestMapping("/") public String login() { return "test"; }}
g.在 templates 目錄下,寫(xiě)書(shū) test.html 頁(yè)面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>test</title> <style type="text/css"> .row{ margin:10px 0px; } .col{ display: inline-block; margin:0px 5px; } </style></head><body><p> <h2>測(cè)試</h2> <p class="row"> <label>用戶(hù)ID:</label><input id="userid-input" type="text" name="userid"/> </p> <p class="row"> <p class="col"> <button id="getuser-btn">獲取用戶(hù)</button> </p> <p class="col"> <button id="adduser-btn">添加用戶(hù)</button> </p> <p class="col"> <button id="deleteuser-btn">刪除用戶(hù)</button> </p> <p class="col"> <button id="getcommonuser-btn">獲取用戶(hù)(common)</button> </p> </p> <p class="row" id="result-p"></p></p></body><script src="https://code.jquery.com/jquery-3.1.1.min.js"></script><script> $(function() { $("#getuser-btn").on("click",function(){ var userId = $("#userid-input").val(); $.ajax({ url: "/user/getUser", data: { userId: userId }, dataType: "json", success: function(data){ $("#result-p").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]"); }, error: function(e){ $("#result-p").text("系統(tǒng)錯(cuò)誤!"); }, }) }); $("#adduser-btn").on("click",function(){ var userId = $("#userid-input").val(); $.ajax({ url: "/user/addUser", data: { id: userId }, dataType: "json", success: function(data){ $("#result-p").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]"); }, error: function(e){ $("#result-p").text("系統(tǒng)錯(cuò)誤!"); }, }) }); $("#deleteuser-btn").on("click",function(){ var userId = $("#userid-input").val(); $.ajax({ url: "/user/deleteUser", data: { userId: userId }, dataType: "json", success: function(data){ $("#result-p").text(data); }, error: function(e){ $("#result-p").text("系統(tǒng)錯(cuò)誤!"); }, }) }); $("#getcommonuser-btn").on("click",function(){ var userId = $("#userid-input").val(); $.ajax({ url: "/user/getCommonUser", data: { userId: userId }, dataType: "json", success: function(data){ $("#result-p").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]"); }, error: function(e){ $("#result-p").text("系統(tǒng)錯(cuò)誤!"); }, }) }); });</script></html>
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