SpringBoot搭建SSM整合Redis缓存数据（菜鸟学习）

前言

自学多时，写一个demo做个总结。
从建项目开始，比较简单的实现springboot+redis缓存，供初学者参考，更快的理解redis缓存。

环境

win10
Idea2018.1.2x64
jdk1.8.0_131
mysql5.7.21
Redis3.2.100
RedisDesktopManager0.8.8.384(redis桌面管理工具)
mysql，redis都是用本地环境

第一步：搭建ssm框架连接mysql

新建项目

https://start.spring.io/

将项目导入idea

项目结构

创建各种包和类如下图

pojo类

这东西到底叫pojo，bean，domain，entity还是vo，我也分不清反正就是实体类
要实现toString方法

package com.sunc.springbootredis.pojo;

public class Hello {
    private Integer id;
    private String text;

    @Override
    public String toString() {
        return "Hello{" +
                "id=" + id +
                ", text='" + text + '\'' +
                '}';
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }
}

service类

package com.sunc.springbootredis.service;

import com.sunc.springbootredis.pojo.Hello;

public interface HelloService {
    public Hello sayHello(Hello hello);
}

service实现类

package com.sunc.springbootredis.service.Impl;

import com.sunc.springbootredis.mapper.HelloMapper;
import com.sunc.springbootredis.pojo.Hello;
import com.sunc.springbootredis.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class HelloServiceImpl implements HelloService {
    @Autowired
    private HelloMapper helloMapper;

    @Override
    public Hello sayHello(Hello hello) {
        return helloMapper.sayHello(hello);
    }
}

mapper

package com.sunc.springbootredis.mapper;

import com.sunc.springbootredis.pojo.Hello;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;

@Mapper
public interface HelloMapper {

    @Select("SELECT * FROM hello WHERE id = #{id}")
    public Hello sayHello(Hello hello);
}

controller

package com.sunc.springbootredis.controller;

import com.sunc.springbootredis.pojo.Hello;
import com.sunc.springbootredis.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/hello")
public class HelloController {
    @Autowired
    private HelloService helloService;

    @RequestMapping("/sayHello")
    public Hello sayHello(){
        Hello hello = new Hello();
        hello.setId(1);
        return helloService.sayHello(hello);
    }
}

Application.properties配置

这里添加debug，方便看mapper中执行sql情况

spring.datasource.url=jdbc:mysql://localhost:3306/sunc?Unicode=true&characterEncoding=UTF8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123321

logging.level.com.sunc.springbootredis.mapper=debug
spring.redis.host=localhost

建表并添加数据

如果使用mapper.xml写SQL

启动类加注解

@MapperScan("com.suncspringbootredis.mapper")

配置文件扫描静态文件）
（注意：mapper.xml放在resources静态文件夹下）

mybatis.mapper-locations=classpath:mapper/*.xml

请求controller

浏览器中请求controller可以看到返回数据，说明已经连接成功
http://localhost:8080/hello/sayHello

连续请求两次，log显示查询两次mysql。框架搭建成功

第二步：整合redis

pojo实体类实现Serializable

public class Hello implements Serializable{

启动类新增注解@EnableCaching

package com.sunc.springbootredis;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;

@SpringBootApplication
@MapperScan("com.suncspringbootredis.mapper")
@EnableCaching
public class SpringbootRedisApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringbootRedisApplication.class, args);
	}
}

Service实现类新增注解@Cacheable(cacheNames = {“hello”})

@Service
public class HelloServiceImpl implements HelloService {
    @Autowired
    private HelloMapper helloMapper;

    @Cacheable(cacheNames = {"hello"})
    @Override
    public Hello sayHello(Hello hello) {
        return helloMapper.sayHello(hello);
    }
}

这时连续请求两次controller

可以看到Log日志只打印一次sql，说明第二次是从redis缓存中查询的，并没有请求mysql
查看RedisDesktopManager可以发现redis已经有hello了

这里text为啥是null我也不知道了，反正是好用了

成功

但是数据看出并没有做序列化，使用的是jdk自带的序列化。后续学习序列化
如有偏颇敬请斧正，本厮邮箱：[email protected]