redis 获取 list 中的所有元素操作

List<String> list = jedis.lrange( key, 0, -1 ); 

List<String> list = new ArrayList<>();
String st = jedis.lpop( key );
while ( st != null ) {
  list.add( st );
  
  st = jedis.lpop( key );
}

/**
 * 连接redis服务的工具类
 * @author yujie.wang3
 *
 */
public final class RedisUtil {  
  //Redis服务器IP
  private static String ADDR = "10.4.36.93";
  
  //Redis的端口号
  private static int PORT = 6379;  
  
  //可用连接实例的最大数目，默认值为8；
  //如果赋值为-1，则表示不限制；如果pool已经分配了maxActive个jedis实例，则此时pool的状态为exhausted(耗尽)。
  private static int MAX_ACTIVE = 100;
  
  //控制一个pool最多有多少个状态为idle(空闲的)的jedis实例，默认值也是8。
  private static int MAX_IDLE = 20;
  
  //等待可用连接的最大时间，单位毫秒，默认值为-1，表示永不超时。如果超过等待时间，则直接抛出JedisConnectionException；
  private static int MAX_WAIT = 10000;
  
  private static int TIMEOUT = 10000;
  
  //在borrow一个jedis实例时，是否提前进行validate操作；如果为true，则得到的jedis实例均是可用的；
  private static boolean TEST_ON_BORROW = true;
  
  private static JedisPool jedisPool = null;
  
  /**
   * 初始化Redis连接池
   */
  static {
    try {
      JedisPoolConfig config = new JedisPoolConfig();
      config.setMaxActive(MAX_ACTIVE);
      config.setMaxIdle(MAX_IDLE);
      config.setMaxWait(MAX_WAIT);
      config.setTestOnBorrow(TEST_ON_BORROW);
      jedisPool = new JedisPool(config, ADDR, PORT);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
  
  /**
   * 获取Jedis实例
   * @return
   */
  public synchronized static Jedis getJedis() {
    try {
      if (jedisPool != null) {
        Jedis resource = jedisPool.getResource();
        return resource;
      } else {
        return null;
      }
    } catch (Exception e) {
      e.printStackTrace();
      return null;
    }
  }
  
  /**
   * 释放jedis资源
   * @param jedis
   */
  public static void returnResource(final Jedis jedis) {
    if (jedis != null) {
      jedisPool.returnResource(jedis);
    }
  }
}

/**
 * 一次返回多个列表值并删除返回值测试类
 * @author yujie.wang
 *
 */
public class RedisTest {
 
 public static void main(String[] args) {
 String key = "yujie_test_list";
 initList(key,9);
 printList(key,"原始列表数据");
 List<String> listResult = getListMultValueAfterDel(key,0,3);
 System.out.println("一次返回并删除数据："+listResult.toString());
 printList(key,"删除之后列表数据");
 }
 
 public static void initList(String key,int maxValue){
 Jedis client = RedisUtil.getJedis();
 for(int i = 0;i <= maxValue; i++){
  client.lpush(key, String.valueOf(i));
 }
 System.out.println("初始化列表："+ key + "完毕");
 }
 
 public static void printList(String key,String message){
 Jedis client = RedisUtil.getJedis();
 List<String> list = client.lrange(key, 0, -1);
 System.out.println(message+ " : " + list.toString());
 }
 
 @SuppressWarnings("unchecked")
 public static List<String> getListMultValueAfterDel(String key,int start, int end){
 List<Object> list = null;
 List<String> listStr = new ArrayList<String>();
 try { 
  Jedis jedis = RedisUtil.getJedis();
  Transaction ts = jedis.multi();
  ts.lrange(key, start, end);
  ts.ltrim(key, end+1, -1);
  list = ts.exec();
  RedisUtil.returnResource(jedis);
 } catch (Exception e) {
  // TODO: handle exception
  System.out.println(e);
 }
 if(list != null && !list.isEmpty()){
  try {
  //获得命令lrange(key, start, end)的返回结果
  listStr = (ArrayList<String>)list.get(0); 
  } catch (Exception e) {
  // TODO: handle exception
  System.out.println(e);
  }  
 } else {
  return Collections.emptyList();
 }
 return listStr;
 }
 
}