63 lines
2.2 KiB
Java
63 lines
2.2 KiB
Java
package com.inmind.controller;
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import com.inmind.entity.User;
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import com.inmind.mapper.UserMapper;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.cache.annotation.CachePut;
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import org.springframework.cache.annotation.Cacheable;
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import org.springframework.web.bind.annotation.*;
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@RestController
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@RequestMapping("/user")
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@Slf4j
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public class UserController {
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@Autowired
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private UserMapper userMapper;
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/*
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*
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* 业务：在新增用户时，将用户信息缓存到redis中
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*
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* Spring Expression Language（SpEL）
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*
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*/
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@PostMapping
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// @CachePut(cacheNames = "userCache",key = "#user.id")//如果使用springCache缓存数据，key的生成的规则：userCache::动态ID
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@CachePut(cacheNames = "userCache",key = "#result.id")//对象导航，result就表示该方法的返回值！！！
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// @CachePut(cacheNames = "userCache",key = "#p0.id")//p0:param0 参数列表中第一个参数
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// @CachePut(cacheNames = "userCache",key = "#a0.id")//a0:argment0 参数列表中第一个参数
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// @CachePut(cacheNames = "userCache",key = "#root.args[0].id")//root.args[0]:save方法的参数列表的第0个参数
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public User save(@RequestBody User user){
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userMapper.insert(user);
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return user;
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}
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@DeleteMapping
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public void deleteById(Long id){
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userMapper.deleteById(id);
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}
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@DeleteMapping("/delAll")
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public void deleteAll(){
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userMapper.deleteAll();
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}
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/*
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需求：在根据id查询用户时，先从redis缓存中查找,如果没有从数据库中查询，并将查询到的数据放入redis中
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注意：Cacheable在方法体执行之前就要获取redis的key值，所以不能使用#result
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Cacheable底层原理：代理对象，如果能查询到缓存数据，直接就不调用原始方法，如果查询不到缓存，那就执行原始方法，查询数据，将查询到的数据保存到
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缓存中
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*/
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@GetMapping
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@Cacheable(cacheNames = "userCache",key = "#id")//key的生成 userCache::#id
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public User getById(Long id){
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User user = userMapper.getById(id);
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return user;
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}
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}
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