Question

我想创建一个条件查询，在其中可以根据方法args设置不同的实体属性和不同的值。

public List<Customer> searchBar(String entityProperty, String value) {

    String nativeQuery = "SELECT * FROM devices WHERE customer_id IN (SELECT customers.id FROM customers WHERE ? = ?)";
    Query query = session.createNativeQuery(nativeQuery);
    query.setParameter(1, entityProperty);
    query.setParameter(2, value);
    return query.getResultList();

您可以假定：

String entityProperty = "phoneNumber"
   String value = "222222222"

当我尝试这种方式时，会得到一个空的结果，但是如果我在nativeQuery语句上对entryProperty进行硬编码，它将按预期工作：

String nativeQuery = "SELECT * FROM devices WHERE customer_id IN (SELECT customers.id FROM customers WHERE phoneNumber = ?)";
Query query = session.createNativeQuery(nativeQuery);
query.setParameter(1, value);
return query.getResultList();

感谢您的时间：）

Answer 1

该setParameter用于设置列的值，而不是列名。使用一般的Java动态地组成列名。类似下面的内容，您应该知道：

public List<Customer> searchBar(String entityProperty, String value) {

    String nativeQuery = String.format("SELECT * FROM devices WHERE customer_id IN (SELECT customers.id FROM customers WHERE %s = ?)",entityProperty);
    Query query = session.createNativeQuery(nativeQuery);
    query.setParameter(1, value);
    return query.getResultList();
}

原生查询问题

1 个答案: