Spring调用Oracle的Function函数

最近搜索了很多网上讲Spring 操作Oracle内部对象的例子，基本上是介绍调用存储过程的~直接调用Oracle内部函数Function的文章真的不多~这里，法老参考了Spring论坛上外国友人的例子，写一个DEMO供大家参考~


测试Oracle函数:
Here is a basic function that returns sysdate in a REF CURSOR:

FUNCTION  MY_DEMO_FNC
     RETURN     MY_REFCURSOR_PKG.RefCursor
AS     
    return_date MY_REFCURSOR_PKG.RefCursor;
BEGIN
     OPEN  return_date  FOR   ' select  sysdate from dual ' ;
     return  return_date;
END  MY_DEMO_FNC;

测试程序:
Here is the class that accesses it:

import  java.sql.ResultSet;
import  java.sql.SQLException;
import  java.util.HashMap;
import  java.util.Map;
import  javax.sql.DataSource;
import  oracle.jdbc.OracleTypes;
import  org.springframework.jdbc.core.RowCallbackHandler;
import  org.springframework.jdbc.core.SqlOutParameter;
import  org.springframework.jdbc.datasource.DriverManagerDataSource;
import  org.springframework.jdbc.object.StoredProcedure;

public   class  RefCursorTestDao 
... {
  public static void main(String[] args) throws Exception 
  ...{
    new RefCursorTestDao().execute();
  }

  public void execute() throws Exception 
  ...{
    DataSource ds = new DriverManagerDataSource(
        "oracle.jdbc.driver.OracleDriver",
        "jdbc:oracle:thin:@localhost:1521:SID1", 
        "user", "password");

    DemoStoredProcedure proc = new DemoStoredProcedure(ds);
    Map params = new HashMap();
    proc.execute(params);
  }

  private class DemoStoredProcedure extends StoredProcedure 
  ...{
    public static final String SQL = "MY_TEST_PKG.MY_DEMO_FNC";

    public DemoStoredProcedure(DataSource ds) 
    ...{
      setDataSource(ds);
      setSql(SQL);
      setFunction(true);
      declareParameter(
         new SqlOutParameter(
             "whatever", OracleTypes.CURSOR,  new DemoRowMapper()));
      compile();
    }
  }

  private class DemoRowMapper implements RowCallbackHandler 
  ...{
    public void processRow(ResultSet rs) throws SQLException 
    ...{
      System.out.println(rs.getTimestamp(1));
    }
  }
  
}

The process is the same for a real procedure with the REF CURSOR as an OUT parameter, but #setFunction should be false instead of true.
参考地址:http://forum.springframework.org/archive/index.php/t-10054.html