java - 从 Java 调用存储过程 - Spring JDBC 的现代替代方案？

Question

我一直在使用 Spring JDBC 的 SimpleJdbcCall。我觉得很有帮助，但对我来说仍然不够简单和流畅。理想情况下，我认为 JDBC 调用与普通的 Java 方法调用没有区别。

看到最近Java出现了很多轻量级的ORM框架（比如Ebean），想问一下存储过程方向有没有类似的发展？

Answer 1

Using JPA 2.1

Calling stored procedures from Java through JDBC or JPA can be very tedious and verbose. If you look a the examples provided by EclipseLink, things haven't gotten that much simpler with JPA 2.1:

@NamedStoredProcedureQuery(
    name="ReadUsingMultipleResultSetMappings",
    procedureName="Read_Multiple_Result_Sets",
    resultSetMappings = {
        "EmployeeResultSetMapping", 
        "AddressResultSetMapping",  
        "ProjectResultSetMapping", 
        "EmployeeConstructorResultSetMapping" 
    }
)

@SqlResultSetMappings({
    @SqlResultSetMapping(
        name = "EmployeeResultSetMapping",
        entities = {
            @EntityResult(entityClass = Employee.class)
        }
    ),
    @SqlResultSetMapping(
        name = "EmployeeConstructorResultSetMapping",
        classes = { 
            @ConstructorResult(
                targetClass = EmployeeDetails.class,
                columns = {
                    @ColumnResult(name="EMP_ID", type=Integer.class),
                    @ColumnResult(name="F_NAME", type=String.class),
                    @ColumnResult(name="L_NAME", type=String.class),
                    @ColumnResult(name="R_COUNT", type=Integer.class)
                }
            )
        }
    )
})

Using jOOQ

A good option is to leverage a code generator, such as the one by jOOQ (I work for the jOOQ vendor, so this answer is biased). Assume this procedure:

-- Check whether there is an author in AUTHOR by that name and get his ID
CREATE OR REPLACE PROCEDURE author_exists (
    author_name VARCHAR2, 
    result OUT NUMBER, 
    id OUT NUMBER
);

Using generated code, you can simply call it as such:

AuthorExists result = Routines.authorExists(configuration, "Paulo");
assertEquals(new BigDecimal("1"), result.getResult());
assertEquals(new BigDecimal("2"), result.getId();

See also the jOOQ manual for details:

• http://www.jooq.org/doc/latest/manual/sql-execution/stored-procedures/
• http://www.jooq.org/doc/latest/manual/sql-execution/stored-procedures/oracle-member-procedures/

Using other code generators

Other code generators exist and can be leveraged to generate the tedious JDBC or JPA code.

Answer 2

可以使用 @NamedStoredProcedureQuery 和其他方法从 JPA 调用存储过程。例如，您可以使用 eclipselink。http://wiki.eclipse.org/EclipseLink/Examples/JPA/StoredProcedures

希望能帮助到你。