java调用Oracle存储过程返回二维数组

以下代码仅仅记录整个过程。
1.在数据库中新建两个类型，分别是：

create or replace type type_record is object(
  name    varchar2(200),
  ymonth    varchar2(2000)
);
create or replace type type_array is table of type_record;

2.存储过程：

create or replace procedure proc_records(p_start in varchar, p_end in varchar, p_records out type_array)
as
  type cur_type is ref cursor;
  startDate date;
  endDate   date;
  querysql  varchar2(4000);
  subquerysql varchar2(400);
  v_cursor cur_type;
  cursor r_cursor is select tr.ymonth,tr.name from tb_record tr where tr.id=-1;
  rec_purch r_cursor%rowtype;
  v_record type_record;
  v_status number;
begin
  startDate:=to_date(p_start,'yyyymm');
  endDate:=to_date(p_end,'yyyymm');
  while startDate <= endDate loop
    begin
      subquerysql:='select ' || to_number(to_char(startDate,'yyyymm')) ||' as ymonth, tp.name from tb_service tp where exists (' ||
                   'select tr.name from tb_record tr where tr.ymonth=' || to_number(to_char(startDate,'yyyymm')) ||' and tr.name=tp.name)';
      querysql:='' || querysql || ' union all ' || subquerysql;
      startDate:=add_months(startDate, 1);
    end;
  end loop;
  p_records:=type_array();
  open v_cursor for substr(querysql, 11);
  loop
    fetch v_cursor into rec_purch;
    exit when v_cursor%notfound;  
      p_records.extend;
      p_records(p_records.count):=type_record(rec_purch.name,rec_purch.ymonth||',');
  end loop;
  dbms_output.put_line(p_records.count);
  close v_cursor;
end;

三、java调用主要代码片段：

    String call = "{ call proc_records(?,?,?,?)}";
    con = DBConnectionFactory.getConfigConnection();
    /**注意这里由于是从java.sql.Connection中执行prepareCall方法，可以直接拿到数据库驱动的实际Connection，如果使用其它框架如：hibernate、ibatis、dbcp之类的，需要先获取底层Connection，下面的代码才能正常的类型转换。
    */
    cstmt = (OracleCallableStatement)con.prepareCall(call);
    cstmt.setString(1, "201210");
    cstmt.setString(2, "201304");
    //注册返回参数为oracle的数组类型，注意类型名称要大写
    cstmt.registerOutParameter(3,
OracleTypes.ARRAY, "TYPE_ARRAY");
    cstmt.execute();
            
    ARRAY array = cstmt.getARRAY(3);
    Datum[] datas = array.getOracleArray();
    if (datas.length > 0) {
        for (int i = 0; i < datas.length; i++) {
        if (datas[i] != null && ((STRUCT) datas[i]) != null) {
         //注意此处返回的Datum元素为byte类型，需要重新包装一下，如new String
	Datum[] dataAttr = ((STRUCT) datas[i])						.getOracleAttributes();
						System.out.println("column" + (i + 1) + ":"			+ new String(dataAttr[0].getBytes()) + ",  "
	+ new String(dataAttr[1].getBytes()));
        } else {
         System.out.println("datas[" + i + "] is null.");
        }
        }
    } else {
         System.out.println("this procedure is not result data...");
    }