redis 保存对象（redisTemplate ）

原文：https://blog.youkuaiyun.com/qq_31024823/article/details/81233752

java 用redisTemplate 的 Operations存取list集合
一 、存取为list类型

@RestController
@RequestMapping("/test")
@Slf4j
public class TestController {
 
    @Autowired
    private RedisTemplate redisTemplate;
 
    @ApiOperation("redis-savelist")
    @PostMapping("/redis/save/list")
    public void redisSaveList() {
        List<Person> list = getPersonList();
        //清空
        while (redisTemplate.opsForList().size("oowwoo") > 0){
            redisTemplate.opsForList().leftPop("oowwoo");
        }
        //存储
        redisTemplate.opsForList().rightPushAll("oowwoo", list);
 
        //取出
        List<Person> oowwoo = redisTemplate.opsForList().range("oowwoo", 0, -1);
        log.info(">>>>>>>>>>>>>>>list = {}", oowwoo.toString());
        Iterator<Person> it = oowwoo.iterator();
        while(it.hasNext()){
            Person p = it.next();
            log.info("person = {}", p.toString());
        }
    }
 
    private List<Person> getPersonList() {
        Person p1 = new Person();
        p1.setId(1L);
        p1.setName("张一");
        p1.setAge(11);
 
        Person p2 = new Person();
        p2.setId(2L);
        p2.setName("张二");
        p2.setAge(22);
 
        Person p3 = new Person();
        p3.setId(3L);
        p3.setName("张三");
        p3.setAge(33);
 
        List<Person> list = new ArrayList<>();
        list.add(p1);
        list.add(p2);
        list.add(p3);
        return list;
    }
}

二 、将list转为json对象存取
 

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
 
 
  @Autowired
    private StringRedisTemplate stringRedisTemplate;
 
//存
List<Long> businessIdList = eeFreecarriageShopService.selectBusinessIdInPromotion();
 stringRedisTemplate.opsForValue().set(RedisConstants.FREECARRIAGE_BUSINESSIDLIST, JSON.toJSON(businessIdList).toString());
 
//取
String businessJsonArray = stringRedisTemplate.opsForValue().get(RedisConstants.FREECARRIAGE_BUSINESSIDLIST);
List<Long> businessIdList = JSONObject.parseArray(businessJsonArray, Long.class);