34 lines
1014 B
Java
34 lines
1014 B
Java
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package cn.palmte.work.service;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import javax.persistence.EntityManager;
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import javax.persistence.PersistenceContext;
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import javax.persistence.Query;
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/**
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* @author Yuanping Zhang
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* @date 2022/08/08
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*/
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@Service
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public class NumSeqService {
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private static final Logger logger = LoggerFactory.getLogger(NumSeqService.class);
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@Autowired
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@PersistenceContext
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private EntityManager entityManager;
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public String generate() {
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String prefix = "P";
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String querySql = "select num from num_seq limit 1";
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Query nativeQuery = entityManager.createNativeQuery(querySql);
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int num = (Integer)nativeQuery.getSingleResult();
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String counterString = String.format("%05d", num++);
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entityManager.createNativeQuery("update num_seq set num = " + num);
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return prefix + counterString;
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}
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}
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