标签：min window 限制 sys 停止 final 说明 hash led
1.安装redis
a.由于官方是没有Windows版的，所以我们需要下载微软开发的redis，网址：https://github.com/MicrosoftArchive/redis/releases
b.解压后，在redis根目录打开cmd界面，输入：redis-server.exe redis.windows.conf，启动redis（关闭cmd窗口即停止）
2.使用
a.创建SpringBoot工程，选择maven依赖
<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: 8080 spring: # redis相关配置 redis: database: 0 host: localhost port: 6379 password: jedis: pool: # 连接池最大连接数（使用负值表示没有限制） max-active: 8 # 连接池最大阻塞等待时间（使用负值表示没有限制） max-wait: -1ms # 连接池中的最大空闲连接 max-idle: 5 # 连接池中的最小空闲连接 min-idle: 0 # 连接超时时间（毫秒）默认是2000ms timeout: 2000ms # thymeleaf热更新 thymeleaf: cache: false
c.创建RedisConfig配置类
@Configuration @EnableCaching //开启缓存 public class RedisConfig { /** * 缓存管理器 * @param redisConnectionFactory * @return */ @Bean public RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) { // 生成一个默认配置，通过config对象即可对缓存进行自定义配置 RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig(); // 设置缓存的默认过期时间，也是使用Duration设置 config = config.entryTtl(Duration.ofMinutes(30)) // 设置 key为string序列化 .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer())) // 设置value为json序列化 .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer())) // 不缓存空值 .disableCachingNullValues(); // 对每个缓存空间应用不同的配置 Map<String, RedisCacheConfiguration> configMap = new HashMap<>(); configMap.put("userCache", config.entryTtl(Duration.ofSeconds(60))); // 使用自定义的缓存配置初始化一个cacheManager RedisCacheManager cacheManager = RedisCacheManager.builder(redisConnectionFactory) //默认配置 .cacheDefaults(config) // 特殊配置（一定要先调用该方法设置初始化的缓存名，再初始化相关的配置） .initialCacheNames(configMap.keySet()) .withInitialCacheConfigurations(configMap) .build(); return cacheManager; } /** * Redis模板类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来序列化和反序列化redis的value值 Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<>(Object.class); //json转对象类，不设置默认的会将json转成hashmap ObjectMapper mapper = new ObjectMapper(); mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); serializer.setObjectMapper(mapper); return serializer; } }
d.创建entity实体类
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.创建Service
@Service public class UserService { //查询：先查缓存是是否有，有则直接取缓存中数据，没有则运行方法中的代码并缓存 @Cacheable(value = "userCache", key = "‘user:‘ + #userId") public User getUser(int userId) { System.out.println("执行此方法，说明没有缓存"); return new User(userId, "用户名(get)_" + userId, "密码_" + userId); } //添加：运行方法中的代码并缓存 @CachePut(value = "userCache", key = "‘user:‘ + #user.id") public User addUser(User user){ int userId = user.getId(); System.out.println("添加缓存"); return new User(userId, "用户名(add)_" + userId, "密码_" + userId); } //删除：删除缓存 @CacheEvict(value = "userCache", key = "‘user:‘ + #userId") public boolean deleteUser(int userId){ System.out.println("删除缓存"); return true; } @Cacheable(value = "common", key = "‘common:user:‘ + #userId") public User getCommonUser(int userId) { System.out.println("执行此方法，说明没有缓存（测试公共配置是否生效）"); return new User(userId, "用户名(common)_" + userId, "密码_" + userId); } }
f.创建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); } }
@Controller public class HomeController { //默认页面 @RequestMapping("/") public String login() { return "test"; } }
g.在 templates 目录下，写书 test.html 页面
<!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> <div> <h1>测试</h1> <div class="row"> <label>用户ID：</label><input id="userid-input" type="text" name="userid"/> </div> <div class="row"> <div class="col"> <button id="getuser-btn">获取用户</button> </div> <div class="col"> <button id="adduser-btn">添加用户</button> </div> <div class="col"> <button id="deleteuser-btn">删除用户</button> </div> <div class="col"> <button id="getcommonuser-btn">获取用户(common)</button> </div> </div> <div class="row" id="result-div"></div> </div> </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-div").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]"); }, error: function(e){ $("#result-div").text("系统错误！"); }, }) }); $("#adduser-btn").on("click",function(){ var userId = $("#userid-input").val(); $.ajax({ url: "/user/addUser", data: { id: userId }, dataType: "json", success: function(data){ $("#result-div").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]"); }, error: function(e){ $("#result-div").text("系统错误！"); }, }) }); $("#deleteuser-btn").on("click",function(){ var userId = $("#userid-input").val(); $.ajax({ url: "/user/deleteUser", data: { userId: userId }, dataType: "json", success: function(data){ $("#result-div").text(data); }, error: function(e){ $("#result-div").text("系统错误！"); }, }) }); $("#getcommonuser-btn").on("click",function(){ var userId = $("#userid-input").val(); $.ajax({ url: "/user/getCommonUser", data: { userId: userId }, dataType: "json", success: function(data){ $("#result-div").text("id[" + data.id + ", userName[" + data.userName + "], userPwd[" + data.userPwd + "]"); }, error: function(e){ $("#result-div").text("系统错误！"); }, }) }); }); </script> </html>
Spring Boot 整合 Spring Cache + Redis
标签：min window 限制 sys 停止 final 说明 hash led
原文地址：https://www.cnblogs.com/vettel0329/p/12015779.html
