Hibernate批量處理操作(批量查詢 批量刪除)

前言

此處以一個Student案例進行演示 根據Student的ids進行批量查詢和刪除

1.批量查詢

1.1 批量查詢Dao層代碼

public List<Student> excuteBatchQuery(String sql, Map<String, List<Object>> map) {
    Session session = this.getSessionFactory().getCurrentSession();
    SQLQuery query = session.createSQLQuery(sql).addEntity(Student.class);
    if (map != null && map.size() > 0) {
        for (Map.Entry<String, List<Object>> entry : map.entrySet()) {
            query.setParameterList(entry.getKey(), entry.getValue());
        }
    }
    return query.list();
}

1.2 批量查詢Service層代碼

@Transactional(rollbackFor = Throwable.class)
public List<Student> batchQuery(String ids) {
    String sql = "select * from T_STUDENT where STUDENT_ID in (:id)";
    Map<String, List<Object>> map = new HashMap<>();
    List<Object> idLong = new ArrayList<>();
    for (Object id : CollectionUtils.arrayToList(ids.split(","))) {
        idLong.add(Long.parseLong(id.toString()));
    }
    map.put("id", idLong);
    return studentDao.excuteBatchQuery(sql, map);
}

2.批量刪除

2.1 批量刪除Dao層代碼

public void excuteBatchDelete(String sql, Map<String, List<Object>> map) {
    Session session = this.getSessionFactory().getCurrentSession();
    SQLQuery query = session.createSQLQuery(sql);
    if (map != null && map.size() > 0) {
        for (Map.Entry<String, List<Object>> entry : map.entrySet()) {
            query.setParameterList(entry.getKey(), entry.getValue());
        }
    }
    query.executeUpdate();
}

2.2 批量刪除Service層代碼

@Transactional(rollbackFor = Throwable.class)
public void batchDelete(String ids) {
    String sql = "delete from T_STUDENT where STUDENT_ID in(:id)";
    Map<String, List<Object>> map = new HashMap<>();
    List<Object> idLong = new ArrayList<>();
    for (Object id : CollectionUtils.arrayToList(ids.split(","))) {
        idLong.add(Long.parseLong(id.toString()));
    }
    map.put("id", idLong);
    this.studentDao.excuteBatchDelete(sql, map);
}

注意:
1.Dao層需要繼承HibernateGenericDao接口
2.在Service層必須開啓事務 否則會出錯(@Transactional)