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            CallableStatement ca = conn.prepareCall("{call Login (?,?)}");
            ca.setString(1,username);
            ca.setString(2,password);
            ca.execute();
//µ÷Óô洢¹ý³Ì´ø·µ»Ø²ÎÊýµÄ
            CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
            ca.setString(1,username);
            ca.setString(2,password);
            ca.registerOutParameter(3,java.sql.Types.INTEGER);
            ca.execute();
            int returnOut = ca.getInt(3);
 //µ÷Óô洢¹ý³Ì´ø·µ»ØÖµµÄreturn
            CallableStatement ca = conn.prepareCall("{?=call Login (?,?,?)}");
            ca.setString(2,username);
            ca.setString(3,password);
            ca.registerOutParameter(1,java.sql.Types.INTEGER);
            ca.execute();
            int returnOut = ca.getInt(1);
    //µ÷Óô洢¹ý³Ì·µ»ØÁ½¸ö½á¹û¼¯
            CallableStatement ca = conn.prepareCall("{call Login (?,?,?)}");
            ca.setString(1,usern


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