Spring Boot中使用Redis做缓存的方法实例

2019-11-26 12:04:56

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来源：转载

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前言

本文主要给大家介绍的是关于Spring Boot中使用Redis做缓存的相关内容，这里有两种方式：

使用注解方式（但是小爷不喜欢）
直接《Spring Boot 使用 Redis》中的redisTemplate

下面来看看详细的介绍：

1、创建UserService

public interface UserService { public User findById(int id); public User create(User user); public User update(User user); public void delete(int id);}

2、创建UserServiceImpl

@Servicepublic class UserServiceImpl implements UserService { @Autowired private UserRepository userRepository; @Autowired private UserRedis userRedis; //this is a key for redis private static final String keyHead = "mysql:get:user:"; @Override public User findById(int id) {  User user = userRedis.get(keyHead+id);  if (user == null) {   user = userRepository.findOne(id);   if (user != null) {    userRedis.add(keyHead+id, 30L, user);   }  }  return user; } @Override public User create(User user) {  User newUser = userRepository.save(user);  if (newUser != null) {   userRedis.add(keyHead+newUser.getId(), 30L, newUser);  }  return newUser; } @Override public User update(User user) {  if (user != null) {   userRedis.delete(keyHead+user.getId());   userRedis.add(keyHead+user.getId(), 30L, user);  }  return userRepository.save(user); } @Override public void delete(int id) {  userRedis.delete(keyHead+id);  userRepository.delete(id); }}

3、创建UserController

@RestController@RequestMapping("/users")public class UserController { @Autowired private UserService userService; @RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE) public Object show(@PathVariable int id) {  User user = userService.findById(id);  return user; }}

4、结果，在30分钟内只会执行一次查询