java - Spring:具有动态参数的 SimpleJdbcCall

Question

我有一个使用 SimpleJdbcCall 的 dao调用 postgres 函数:

public final class AuthDAO extends UntypedActor {

    private final ActorRef manager;

    private final JdbcTemplate jdbcTemplate;

    private final SimpleJdbcCall jdbcCall;

    public AuthDAO(ActorRef manager) {
        this.manager = manager;
        jdbcTemplate = DBConfig.jdbcTemplate();
        jdbcCall = new SimpleJdbcCall(jdbcTemplate)
                .withSchemaName("auth")
                .withCatalogName("public")
                .withoutProcedureColumnMetaDataAccess();
    }

    public static Props create(ActorRef manager) {
        return Props.create(AuthDAO.class, manager);
    }

    @Override
    public void onReceive(Object o) throws Throwable {
        if (o instanceof DBMessage) {

            DBMessage message = (DBMessage) o;
            jdbcCall.declareParameters(new SqlParameter("login", Types.VARCHAR));
            Map<String, Object> response = jdbcCall
                    .withProcedureName(message.getProcedure())
                    .execute(message.getParams());

            System.out.println(response.toString());
        }
    }
}

但现在我必须通过调用 jdbcCall.declareParameters() 来显式声明函数的参数，否则代码将无法工作。

那么有没有一种方法可以动态检测函数参数的名称和类型，并使用这样的 dao 来仅传递函数名称来调用不同的函数？

Answer 1

我figured it out .

Explicit declarations are necessary if the database you use is not a Spring-supported database. Currently Spring supports metadata lookup of stored procedure calls for the following databases: Apache Derby, DB2, MySQL, Microsoft SQL Server, Oracle, and Sybase. We also support metadata lookup of stored functions for MySQL, Microsoft SQL Server, and Oracle.

而且，天哪，我使用 Postgres。