The operator * is undefined for the argument type(s) java.lang.String, java.lang

[mushroom_aaa]

以下是我的代码，jsp文件中的java代码，是要向数据库进行插入操作

String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; // 加载JDBC驱动
String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=memberdb"; // 连接服务器和数据库
Connection conn ;
try {
Class.forName(driverName
conn = DriverManager.getConnection(dbURL,"sa","123456");
Statement stmt;
ResultSet res;
stmt=conn.createStatement();
res = stmt.executeQuery("select * from card");
//处理结果集
request.setCharacterEncoding("gb2312");
String me_id = request.getParameter("userid");
String me_name = request.getParameter("me_name");
String me_gender = request.getParameter("me_gender");
String me_birth =request.getParameter("me_birth");
String me_phone = request.getParameter("me_phone");
String me_address = request.getParameter("me_address");
String me_mail = request.getParameter("me_mail");
String me_job = request.getParameter("me_job");

String sql="INSERT INTO member VALUES ('"+me_id+"','"+me_name+"','"+me_gender+"','"+me_gender+"','"+me_birth+"','"+me_phone+"','"+me_address+"','"+me_mail+"','"+me_job+"')";
stmt.executeUpdate(sql);

String ca_passwd = request.getParameter("password");
String br_name = request.getParameter("br_name");
int ca_pledge = Integer.parseInt(request.getParameter("ca_pledge"));
String ca_status = new String("正常");
int ca_balance = Integer.parseInt(request.getParameter("ca_balance"));
String ca_effective_date = request.getParameter("date_year")+"-"+ request.getParameter("date_month")+"-"+ request.getParameter("date_day");
String ca_expiry_date = request.getParameter("date_year2")+"-"+ request.getParameter("date_month2")+"-"+ request.getParameter("date_day2");
String ca_detail = request.getParameter("ca_detail");

String sql2="INSERT INTO card VALUES ('"+me_id+"','"+ca_passwd+"','"+ca_status+"','"br_name"','"+ca_balance+"','"+ca_effective_date+"','"+ca_expiry_date+"','"+ca_detail+"')";
stmt.executeUpdate(sql2);
out.println("<script>alert('添加成功!');location.replace('memberInsert.jsp')</script>");

res.close();
stmt.close();
conn.close();
}catch (Exception ex) {
System.out.println("Error : " + ex.toString());
}