### Question:
PoConvertUtil { public static String getAgentId(NulsDigestData hash) { String hashHex = hash.getDigestHex(); return hashHex.substring(hashHex.length() - 8).toUpperCase(); }  static Agent poToAgent(AgentPo agentPo); static AgentPo agentToPo(Agent agent); static Deposit poToDeposit(DepositPo po); static DepositPo depositToPo(Deposit deposit); static String getAgentId(NulsDigestData hash);  }### Answer:
@Test public void getAgentId() { NulsDigestData hash = NulsDigestData.calcDigestData("123123".getBytes()); System.out.println(PoConvertUtil.getAgentId(hash)); System.out.println(hash); assertTrue(true); }