Question

我有一个具有2个输出参数varchar2和ref_cursor的过程

PROCEDURE login_check (id_in         IN     edit_users.userid%TYPE,
                      password_in   IN     edit_users.usr_password%TYPE,
                      status_out       OUT VARCHAR2,
                      cur_out          OUT SYS_REFCURSOR
                     )

我定义了一个namedStoredProcedureQuery

  @NamedStoredProcedureQuery(name = "login_check",
            procedureName = "edit_maintenance.login_check",
    parameters = {
            @StoredProcedureParameter(mode = ParameterMode.IN, name ="id_in",type = String.class),
            @StoredProcedureParameter(mode = ParameterMode.IN, name ="password_in",type = String.class),
            @StoredProcedureParameter(mode = ParameterMode.OUT, name ="status_out",type = String.class),
            @StoredProcedureParameter(mode = ParameterMode.REF_CURSOR, name ="cur_out", type = void.class)

    })

当我通过storedProcedureQuery调用此过程时，可以获取“ status_out”，但在调用getResultList方法时却出现了空点异常。

 StoredProcedureQuery storedProcedureQuery = em.createNamedStoredProcedureQuery("login_check");
    storedProcedureQuery.setParameter("id_in",username);
    storedProcedureQuery.setParameter("password_in",password);
    storedProcedureQuery.execute();
    String status = (String)storedProcedureQuery.getOutputParameterValue("status_out");
    System.out.println(status);
    List<UserTo> userToList = storedProcedureQuery.getResultList();
    return userToList.get(0);

ava.lang.NullPointerException
at org.hibernate.loader.custom.JdbcResultMetadata.<init>(JdbcResultMetadata.java:32)
at org.hibernate.loader.custom.CustomLoader.autoDiscoverTypes(CustomLoader.java:476)
at org.hibernate.result.internal.OutputsImpl$CustomLoaderExtension.processResultSet(OutputsImpl.java:285)
at org.hibernate.result.internal.OutputsImpl.extractResults(OutputsImpl.java:136)
at org.hibernate.procedure.internal.ProcedureOutputsImpl.access$500(ProcedureOutputsImpl.java:26)
at org.hibernate.procedure.internal.ProcedureOutputsImpl$ProcedureCurrentReturnState.lambda$buildExtendedReturn$0(ProcedureOutputsImpl.java:95)
at org.hibernate.result.internal.ResultSetOutputImpl.getResultList(ResultSetOutputImpl.java:41)
at org.hibernate.procedure.internal.ProcedureCallImpl.getResultList(ProcedureCallImpl.java:756)
at com.schenker.editrade.repository.UserRepositoryImpl.loginCheck(UserRepositoryImpl.java:23)
at com.schenker.editrade.repository.UserRepositoryImpl$$FastClassBySpringCGLIB$$61af36ef.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)

Answer 1

看起来您正在获得此异常，因为缺少光标输出的元数据。您可以尝试将适当的Java类型用于光标输出，而不是“ void.class”。

根据文档here，游标可以映射到以下Java类型之一：

java.sql.ResultSet
sqlj.runtime.ResultSetIterator

例如，您可以尝试以下方式：

@StoredProcedureParameter(mode = ParameterMode.REF_CURSOR, name ="cur_out", type = java.sql.ResultSet.class)

StoredProcedureQuery多个输出类型

1 个答案: