前言
请看下面代码：
String key = String.format("test_key:%s", System.currentTimeMillis()/1000);
String key2=key+"_2";
String key3=key+"_3";
List<String> t1=new ArrayList<>();
t1.add("2");
t1.add("3");
t1.add("4");
t1.add("5");
t1.add("1");
redisTemplate.opsForList().leftPushAll(key, t1);
redisTemplate.opsForList().leftPushAll(key3, t1.toArray());
redisTemplate.opsForList().leftPushAll(key2,new String[]{"dfdg","dgdaasdf","gdadfdf"});
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其中，那么，请猜测一下各个key里面的内容，
下面开奖了：
结论
leftPushAll可以传 Object… 数组，也可以传 Collection进去。
然后实际上，我这边传 ArrayList这些数组是不行的，必须转换为 [] 这种数组—就是说，api里面的leftPushAll(Collection list)
用不了，具体原因还在查。。。
不过网上资料太少了。。
补充：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;
}
}
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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);
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