redis如何循环遍历key

redis循环遍历key的示例：

@Test
public void test12(){
Jedis jedis = new Jedis("x.x.x.x", 6379);
jedis.auth("xxx");
long start = System.currentTimeMillis();
String cursor = "0";
do {
ScanParams scanParams = new ScanParams();
scanParams.match("hello*");
ScanResult scan = jedis.scan(cursor, scanParams);
List result = scan.getResult();
result.forEach(x->{
System.out.println(x);
});
cursor = scan.getStringCursor();
}while (!StringUtils.equals("0",cursor));
long end = System.currentTimeMillis();
System.out.println(new Double(end-start)/1000d);
}

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