SpringBoot系列-- 集成 Redis 缓存（实战）

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

package springboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.scheduling.annotation.EnableScheduling;

@SpringBootApplication
@EnableScheduling
@EnableCaching
public class SpringbootApplication{

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

# Redis数据库索引（默认为0）
spring.redis.database=0
# Redis服务器地址
spring.redis.host=172.31.19.222
# Redis服务器连接端口
spring.redis.port=6379
# Redis服务器连接密码（默认为空）
spring.redis.password=
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.pool.max-active=8
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间（毫秒）
spring.redis.timeout=0

package springboot.config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;


/**
* Redis缓存配置类
* @author szekinwin
*
*/
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport{

   @Value("${spring.redis.host}")
   private String host;
   @Value("${spring.redis.port}")
   private int port;
   @Value("${spring.redis.timeout}")
   private int timeout;
   
   //自定义缓存key生成策略
//    @Bean
//    public KeyGenerator keyGenerator() {
//        return new KeyGenerator(){
//            @Override
//            public Object generate(Object target, java.lang.reflect.Method method, Object... params) {
//                StringBuffer sb = new StringBuffer();
//                sb.append(target.getClass().getName());
//                sb.append(method.getName());
//                for(Object obj:params){
//                    sb.append(obj.toString());
//                }
//                return sb.toString();
//            }
//        };
//    }
   //缓存管理器
   @Bean 
   public CacheManager cacheManager(@SuppressWarnings("rawtypes") RedisTemplate redisTemplate) {
       RedisCacheManager cacheManager = new RedisCacheManager(redisTemplate);
       //设置缓存过期时间 
       cacheManager.setDefaultExpiration(10000);
       return cacheManager;
   }
   @Bean
   public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory){
       StringRedisTemplate template = new StringRedisTemplate(factory);
       setSerializer(template);//设置序列化工具
       template.afterPropertiesSet();
       return template;
   }
    private void setSerializer(StringRedisTemplate template){
           @SuppressWarnings({ "rawtypes", "unchecked" })
           Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
           ObjectMapper om = new ObjectMapper();
           om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
           om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
           jackson2JsonRedisSerializer.setObjectMapper(om);
           template.setValueSerializer(jackson2JsonRedisSerializer);
    }
}

package springboot.dao;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;

import springboot.domain.User;

@Mapper
@CacheConfig(cacheNames = "users")
public interface UserMapper {

   @Insert("insert into user(name,age) values(#{name},#{age})")
   int addUser(@Param("name")String name,@Param("age")String age);
   
   @Select("select * from user where id =#{id}")
   @Cacheable(key ="#p0") 
   User findById(@Param("id") String id);
   
   @CachePut(key = "#p0")
   @Update("update user set name=#{name} where id=#{id}")
   void updataById(@Param("id")String id,@Param("name")String name);
   
   //如果指定为 true，则方法调用后将立即清空所有缓存
   @CacheEvict(key ="#p0",allEntries=true)
   @Delete("delete from user where id=#{id}")
   void deleteById(@Param("id")String id);
   
}

package springboot.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import springboot.dao.UserMapper;
import springboot.domain.User;


@Service
public class UserService {

   @Autowired
   private UserMapper userMapper;
   
   
   public User findById(String id){
       return userMapper.findById(id);
   }
   
   public int addUser(String name,String age){
       return userMapper.addUser(name,age);
   }
   
   public void updataById(String id,String name){
        userMapper.updataById(id,name);
   }
   
   public void deleteById(String id){
       userMapper.deleteById(id);
   }
}

package springboot.web;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import springboot.domain.User;
import springboot.service.UserService;

@RestController
public class HelloController {
   
   @Autowired
   private UserService userService;
   
   @RequestMapping("/adduser")
   public int addUser(@RequestParam("name")String name,@RequestParam("age")String age){
       return userService.addUser(name, age);
   }
   @RequestMapping("/findUser")
   public User findUser(@RequestParam("id") String id){
       return userService.findById(id);
   }
   @RequestMapping("/updataById")
   public String updataById(@RequestParam("id") String id,@RequestParam("name") String name){
       try {
           userService.updataById(id, name);
       } catch (Exception e) {
           return "error";
       }
       return "success";
   }
   
   @RequestMapping("/deleteById")
   public String deleteById(@RequestParam("id") String id){
       try {
           userService.deleteById(id);
       } catch (Exception e) {
           return "error";
       }
       return "success";
   }
}

## LOG4J配置
log4j.rootCategory=DEBUG,stdout
## 控制台输出
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} %5p %c{1}:%L - %m%n