[大数据]SpringBoot集成-Redis

SpringBoot集成-Redis

1. 起步依赖

		<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

2. 配置文件:application.properties

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/db3?useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123456


spring.jpa.database=MySQL
spring.jpa.show-sql=true
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.nameing_startegy=org.hibernate.cfg.ImprovedNamingStrategy

spring.redis.host=127.0.0.1
spring.redis.port=6379

3. 测试类

package com.example.demo;

import com.example.demo.pojo.Student;
import com.example.demo.repository.StudentRepository;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest(classes = DemoApplication.class)
public class RedisTest {

    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    @Autowired
    private StudentRepository studentRepository;

    @Test
    public void test(){

        String studentData = redisTemplate.boundValueOps("myStudent").get();

        if(studentData == null) {
            List<Student> all = studentRepository.findAll();
            ObjectMapper objectMapper = new ObjectMapper();
            try{
                studentData = objectMapper.writeValueAsString(all);
                redisTemplate.boundValueOps("myStudent").set(studentData);
                System.out.println("从数据库中获取数据");
            } catch (JsonProcessingException e){
                e.printStackTrace();
            }
        }else {
            System.out.println("从缓存中获取数据");
        }
        System.out.println("取得的数据："+studentData);
    }
}