在Struts中怎么把中文数据从JSP页面提交到MySql数据库中

Struts中的Action文件代码：
public class TiJiaoAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws UnsupportedEncodingException {
ActionForward actionforward = new ActionForward();

UserInfoActionForm userInfoForm = (UserInfoActionForm)form;

request.setCharacterEncoding("gb2312");
String id = userInfoForm.getId();
String name = userInfoForm.getName();

Connection con = null;
Statement sta = null;

try{
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost/china";
String user = "root";
String pwd = "111";

con = DriverManager.getConnection(url,user,pwd);
sta = con.createStatement();

String sql = "insert into user_info values('"+id+"','"+name+"')";
sta.executeUpdate(sql);
actionforward = mapping.findForward("success");

}catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (sta != null) {
try {
sta.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (con != null) {
try {
con.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return actionforward;
}
}
JSP页面中编码(<%@ page language="java" pageEncoding="gb2312"%>)也是GB2312。
但是在jsp页面提交时显示下面错误信息（在数据库平台可以直接向表中插入中文数据）：
com.mysql.jdbc.MysqlDataTruncation: Data truncation: Data too long for column 'name' at row 1
跪求天下IT豪杰,代码尽量写的详细点，本人比较笨，思念答案早日到来...