jdbc，createStatement带参数和不带参数的区别（图）

Question

  pstmt = connection_read.prepareStatement(read_sql);
                        ResultSet rs2 = pstmt.executeQuery();
                        
                        stmt = connection_read.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
                        ResultSet rs3 = stmt.executeQuery(read_sql);
                        
                        while (rs3.next()) {
                             System.out.println(new String(rs3.getString("QYMC").getBytes("ISO8859-1"), "GBK").trim()+"........rs3");
                        }
                        while (rs2.next()) {
                             System.out.println(new String(rs2.getString("QYMC").getBytes("ISO8859-1"), "GBK").trim()+"--------rs2");
                        }输出结果：
J/<RW/5dOiC3RWSPO^9+K>........rs3
J/<RW/720B5gWS?F<<SPO^9+K>........rs3
J/<RW/=pJ/WSILC3SPO^9+K>........rs3
:S11L)?F02H+<<JuSPO^9+K>........rs3
石家庄市众力凯达经贸有限公司--------rs2
河北清风人工环境工程有限公司--------rs2
河北凤春贸易有限公司--------rs2
石家庄市吕欧贸易有限公司--------rs2
createStatement()不带参数的也不乱码，为嘛加上参数就转不了编码了？sqlstringjdbcscroll