Spring Boot 整合redis

Spring Boot 整合redis

application.properties

# 配置redis
spring.redis.host=39.105.24.26
spring.redis.password=liaogui

application.yml

# druid连接池
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driverClassName: com.mysql.cj.jdbc.Driver
    driver-class-name: com.mysql.cj.jdbc.Driver
    platform: mysql
    url: jdbc:mysql://localhost:3306/liaogui?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
    username: root
    password: liaogui
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    filters: stat,wall,log4j2
    logSlowSql: true

重写redisTemplate,指定序列化方式Json

RedisConfig

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

@Configuration
public class RedisConfig {
    /*
    重写
     */
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> template = new RedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        //指定自己的序列化方式 用json,序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer
                =new Jackson2JsonRedisSerializer(Object.class);
        template.setDefaultSerializer(jackson2JsonRedisSerializer);
        return template;
    }
}

UsersPlusController.java(控制层)

import com.xmx.entity.UsersPlus;
import com.xmx.service.IUsersPlusService;
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;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 

 *  前端控制器
 * 
 *
 * @author jobob
 * @since 2021-07-19
 */
@RestController
@RequestMapping("/xmx/")
public class UsersPlusController {
    @Autowired
    IUsersPlusService iUsersPlusService;
    @GetMapping("getid/{id}")
    //@PathVariable 将url中占位符参数{}绑定到处理器类方法行参中
    public Object getId(@PathVariable("id") Integer id){
        ExecutorService es = Executors.newFixedThreadPool(100);
        for (int i=0;i<=500;i++){
            es.submit(new Runnable() {
                @Override
                public void run() {
                    Object usersPlus =  iUsersPlusService.findById(id);
                }

            });

        }
        Object usersPlus =  iUsersPlusService.findById(id);
        return usersPlus;
    }
}

IUsersPlusService.java(接口)

import com.xmx.entity.UsersPlus;
import com.baomidou.mybatisplus.extension.service.IService;

/**
 * 

 *  服务类
 * 
 *
 * @author jobob
 * @since 2021-07-19
 */
public interface IUsersPlusService extends IService<UsersPlus> {
    Object findById(Integer id);
}

UsersPlusServiceImpl.java(服务层)

import com.xmx.entity.UsersPlus;
import com.xmx.mapper.UsersPlusMapper;
import com.xmx.service.IUsersPlusService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

/**
 * 

 *  服务实现类
 * 
 *
 * @author jobob
 * @since 2021-07-19
 */
@Service
public class UsersPlusServiceImpl extends ServiceImpl<UsersPlusMapper, UsersPlus> implements IUsersPlusService {
    /**
     * 第一次查询用数据库,其他的时候用redis
     * @param id
     * @return
     */
    @Autowired
    private RedisTemplate redisTemplate;
    @Override
    public Object findById(Integer id) {
        Object obj = redisTemplate.opsForValue().get(id);
        if (obj==null){
            //锁住字节码文件
            synchronized (this.getClass()){
                if (obj==null){
                    //查数据库
                    UsersPlus usersPlus = getById(id);
                    //存入redis
                    redisTemplate.opsForValue().set(id,usersPlus);
                    System.out.println("存入redis");
                    return usersPlus;
                }else {
                    System.out.println("查询redis");
                    return obj;
                }
            }

        }else{
            //查缓存
            System.out.println("查询redis ");
            return obj;
        }

    }
}

UsersPlus.java(实体类)

import com.xmx.entity.UsersPlus;
import com.xmx.mapper.UsersPlusMapper;
import com.xmx.service.IUsersPlusService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

/**
 * 

 *  服务实现类
 * 
 *
 * @author jobob
 * @since 2021-07-19
 */
@Service
public class UsersPlusServiceImpl extends ServiceImpl<UsersPlusMapper, UsersPlus> implements IUsersPlusService {
    /**
     * 第一次查询用数据库,其他的时候用redis
     * @param id
     * @return
     */
    @Autowired
    private RedisTemplate redisTemplate;
    @Override
    public Object findById(Integer id) {
        Object obj = redisTemplate.opsForValue().get(id);
        if (obj==null){
            //锁住字节码文件
            synchronized (this.getClass()){
                if (obj==null){
                    //查数据库
                    UsersPlus usersPlus = getById(id);
                    //存入redis
                    redisTemplate.opsForValue().set(id,usersPlus);
                    System.out.println("存入redis");
                    return usersPlus;
                }else {
                    System.out.println("查询redis");
                    return obj;
                }
            }

        }else{
            //查缓存
            System.out.println("查询redis ");
            return obj;
        }

    }
}