Spring Boot基于API的Redis缓存实现

本篇随笔基于https://www.cnblogs.com/my-program-life/p/12067656.html 实现

一、使用Redis API进行业务数据缓存管理

在service下新建ApiCommentService,删除原有的CommentService

package com.uos.cache.service;


import com.uos.cache.domain.Comment;
import com.uos.cache.repository.CommentRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.Optional;
import java.util.concurrent.TimeUnit;

@Service
public class ApiCommentService {
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private CommentRepository commentRepository;
    public Comment findById(int comment_id){
        Object object =  redisTemplate.opsForValue().get("comment_"+comment_id);
        if (object!=null){
            return (Comment)object;}else {
            Optional<Comment> optional = commentRepository.findById(comment_id);
            if(optional.isPresent()){Comment comment= optional.get();
                redisTemplate.opsForValue().set("comment_"+comment_id,
                        comment,1, TimeUnit.DAYS);return comment;
            }else {return null;}
        }
    }
    public Comment updateComment(Comment comment){
        commentRepository.updateComment(comment.getAuthor(), comment.getaId());
        redisTemplate.opsForValue().set("comment_"+comment.getId(),comment);
        return comment;
    }
    public void deleteComment(int comment_id){
        commentRepository.deleteById(comment_id);
        redisTemplate.delete("comment_"+comment_id);
    }

}

ApiCommentService

二、在controller层下新建ApiCommentController

删除原有的CommentController

package com.uos.cache.controller;

import com.uos.cache.domain.Comment;
import com.uos.cache.service.ApiCommentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/api")
public class ApiCommentController {
    @Autowired
    private ApiCommentService apiCommentService;
    @GetMapping("/get/{id}")
    public Comment findById(@PathVariable("id") int comment_id){
        Comment comment = apiCommentService.findById(comment_id);
        return comment;
    }
    @GetMapping("/update/{id}/{author}")
    public Comment updateComment(@PathVariable("id") int comment_id,
                                 @PathVariable("author") String author){
        Comment comment = apiCommentService.findById(comment_id);
        comment.setAuthor(author);
        Comment updateComment = apiCommentService.updateComment(comment);
        return updateComment;
    }
    @GetMapping("/delete/{id}")
    public void deleteComment(@PathVariable("id") int comment_id){
        apiCommentService.deleteComment(comment_id);
    }

}

ApiCommentController

三、主程序类

四、效果测试

查询测试

更新测试

 删除测试

      相对使用注解的方式，使用Redis API进行数据缓存管理更加灵活，例如，

手机验证码进行验证时，可以在缓存中设置验证等待时间。

     相比使用注解的方式进行缓存管理，使用Redis API的方式编写的代码量可能会更多。