java操作oracle的存储过程 或函数的数据主要有以下几种:无返回参数,返回单个参数,返回结果集;前两种容易使用,下面主要介绍第三种返回结果集;下面给出两种方式,分别是使用存储过程和函数的形式;
存储过程,首先为了方便建立一个自己的包,如下:
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CREATE OR REPLACE PACKAGE pkg_test AS TYPE OEPSMWS_CURSOR IS REF CURSOR; PROCEDURE get_data(p_id NUMBER,p_rc OUT OEPSMWS_CURSOR); function funcGetdatas(p_id number) return OEPSMWS_CURSOR; END pkg_test;
分别定义了返回的游标,和过程及函数的定义;
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CREATE OR REPLACE PACKAGE BODY pkg_test AS procedure get_datas(p_id number,o_cursor out OEPSMWS_CURSOR ) is result_sql varchar2(200); begin if p_id is null or p_id=0 then open o_cursor for select * from area; else result_sql:='select * from area where id =:v_id'; open o_cursor for result_sql using p_id; end if; end get_datas; ----- function funcGetdatas(p_id number) return o_cursor is rc OEPSMWS_CURSOR ; --定义ref cursor变量 sqlstr2 varchar2(500); begin if p_id =0 then --静态测试,直接用select语句直接返回结果 open o_cursor for SELECT ID,name,code FROM area; else --动态sql赋值,用:w_id来申明该变量从外部获得 sqlstr2 := 'select id,name,code from area where id =:w_id'; --动态测试,用sqlstr字符串返回结果,用using关键词传递参数 open o_cursor for sqlstr2 using p_id; end if; return o_cursor ; end funcGetdatas; end pkg_test;
??这样就通过存储过程或函数分别获取返回结果集的游标了;下面是java调用方式:
public static void testOrclcursor(){ String driver = "oracle.jdbc.driver.OracleDriver"; String url = "jdbc:oracle:thin:@127.0.0.1:1521:XE "; String user = ""; String pwd = ""; Connection conn = null; CallableStatement cs = null; ResultSet rs = null; try { Class.forName(driver); conn = DriverManager.getConnection(url, user, pwd); cs = conn.prepareCall("{ call pkg_test.funcGetdatas(?,?) }"); cs.setInt(1, 290); cs.registerOutParameter(2, oracle.jdbc.OracleTypes.CURSOR); cs.execute(); rs = ((OracleCallableStatement) cs).getCursor(2); // 或者下一种方式 // rs=(ResultSet) cs.getObject(2); if (rs != null) { while (rs.next()) { System.out.println(rs.getString("code")); } } } catch (ClassNotFoundException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } }
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