作者:Hmily-西瓜先生 | 来源:互联网 | 2022-12-03 16:23
我们正在尝试调用SQL Server过程调用(3个参数):
ALTER PROCEDURE [mvm].[CHECK_USER]
@IN_USER char(40),
@IN_PASS char(40),
@OUT_OK int output
AS
BEGIN TRY ...
...
SET @OUT_OK = 0
...
RETURN @OUT_OK (Yes! It has a return)
在Java Spring Boot应用程序中,我们将它们添加到pom.xml
com.microsoft.sqlserver
mssql-jdbc
runtime
org.springframework.boot
spring-boot-starter-data-jpa
我们在存储库中提出了两个方法:
方法1(注释):
@Entity
@NamedStoredProcedureQueries({
@NamedStoredProcedureQuery(
name = "CheckUser",
procedureName = "mvm.CHECK_USER",
parameters = {
@StoredProcedureParameter(mode = ParameterMode.IN, /*name = "@IN_USER",*/ type = String.class),
@StoredProcedureParameter(mode = ParameterMode.IN, /*name = "@IN_PASS",*/ type = String.class),
@StoredProcedureParameter(mode = ParameterMode.INOUT /*name = "@OUT_OK",*/, type = Long.class )
})
})
public class User implements Serializable {
@Id //To avoid build fail
private int id;
}
然后:
public interface TableCheckUser extends CrudRepository {
@Procedure(name = "CheckUser")
Long checkUser(String user, String password, Long value);
}
在这种情况下,我们会出现错误:
org.springframework.dao.InvalidDataAccessApiUsageException: Could not locate parameter registered using that position [4]; nested exception is java.lang.IllegalArgumentException: Could not locate parameter registered using that position [4]
方式2(书面):
@Repository
public class ProcedureInvoker {
private final EntityManager entityManager;
@Autowired
public ProcedureInvoker(final EntityManager entityManager) {
this.entityManager = entityManager;
}
public long getCheckUserValue(String user, String password) {
StoredProcedureQuery storedProcedureQuery = entityManager.createStoredProcedureQuery("mvm.CHECK_USER");
storedProcedureQuery.registerStoredProcedureParameter(1, String.class, ParameterMode.IN);
storedProcedureQuery.registerStoredProcedureParameter(2, String.class, ParameterMode.IN);
storedProcedureQuery.registerStoredProcedureParameter(3, Long.class, ParameterMode.INOUT);
storedProcedureQuery.setParameter(1, user);
storedProcedureQuery.setParameter(2, password);
storedProcedureQuery.setParameter(3, new Long(3));
storedProcedureQuery.execute();
//Another try (with fail) Call to stored procedure [mvm.checkUser] returned no results
//Object myobj = storedProcedureQuery.getSingleResult();
//final Long otherlOng= (Long) myobj;
final Long outputValue2 = (Long) storedProcedureQuery.getOutputParameterValue(3);
return outputValue2;
}
我们得到:
2018-09-28 09:36:15.697 TRACE -- [nio-8080-exec-4] o.h.t.d.s.BasicBinder : binding parameter [1] as [VARCHAR] - [myuser]
2018-09-28 09:36:15.770 TRACE --- [nio-8080-exec-4] o.h.t.d.s.BasicBinder : binding parameter [2] as [VARCHAR] - [mypass]
2018-09-28 09:36:15.844 TRACE --- [nio-8080-exec-4] o.h.t.d.s.BasicBinder : binding parameter [3] as [BIGINT] - [3]
2018-09-28 09:36:15.977 DEBUG --- [nio-8080-exec-4] o.h.r.i.OutputsImpl : Building Return [isResultSet=false, updateCount=-1, extendedReturn=false
2018-09-28 09:36:17.323 DEBUG --- [l-1 housekeeper] c.z.h.p.HikariPool : HikariPool-1 - Pool stats (total=10, active=0, idle=10, waiting=0)
2018-09-28 09:36:22.940 DEBUG --- [nio-8080-exec-4] o.h.e.j.s.SqlExceptionHelper : Unable to extract OUT/INOUT parameter value [n/a]
com.microsoft.sqlserver.jdbc.SQLServerException: The statement is closed.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:227)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.checkClosed(SQLServerStatement.java:1014)
at com.microsoft.sqlserver.jdbc.SQLServerCallableStatement.getLong(SQLServerCallableStatement.java:651)
at com.zaxxer.hikari.pool.HikariProxyCallableStatement.getLong(HikariProxyCallableStatement.java)
我们尝试了几种方法(添加参数,移除输出参数),但是有错误。
谢谢!
1> mvelazquezm..:
解决了!!
我不需要execute()行。它仅与此一起工作:
StoredProcedureQuery storedProcedureQuery = entityManager.createStoredProcedureQuery("mvm.CHECK_USER");
storedProcedureQuery.registerStoredProcedureParameter(1, String.class, ParameterMode.IN);
storedProcedureQuery.registerStoredProcedureParameter(2, String.class, ParameterMode.IN);
storedProcedureQuery.registerStoredProcedureParameter(3, Long.class, ParameterMode.INOUT);
storedProcedureQuery.setParameter(1, user);
storedProcedureQuery.setParameter(2, password);
storedProcedureQuery.setParameter(3, new Long(3));
Long outputValue2 = (Long) storedProcedureQuery.getOutputParameterValue(3);