java.lang.NullPointerException

        at com.jfinal.plugin.activerecord.Model.find(Model.java:457)

        at com.jfinal.plugin.activerecord.Model.findFirst(Model.java:484)

        at org.aish.orm.model.SysUser.getByName(SysUser.java:47)

        at org.aish.admin.controller.IndexController.login(IndexController.java:38)

---------------------------------------------------------------

System.out.println("===IndexController================"+username);

SysUser user = SysUser.dao.getByName(username);显示这行报错jfinal用的1.9

*/

public M findFirst(String sql, Object... paras) {

List<M> result = find(sql, paras);

return result.size() > 0 ? result.get(0) : null;

}

哪里错了？？？