How do I use a validator in Spring? I encountered a 500 error
-error details:
HTTPステータス 500 - Request processing failed; nested exception is java.lang.IllegalStateException: An Errors/BindingResult argument is expected to be immediately after the model attribute argument in the controller method signature: public java.lang.String
-validator class:
public class loginvalidator implements Validator{
//交換できるオブジェクトなのか
@Override
public boolean supports(Class<?> clazz) {
return MemberModel.class.isAssignableFrom(clazz);
}
@Override
public void validate(Object target, Errors errors) {
ValidationUtils.rejectIfEmpty(errors, "id", "id.empty");
ValidationUtils.rejectIfEmpty(errors, "password", "id.empty");
MemberModel membermodel= (MemberModel)target;
boolean patternCheck = Pattern.matches("^[a-zA-Z0-9]*$", membermodel.getPassword());
if(membermodel.getPassword().length()>4||patternCheck){
errors.rejectValue("password", "negativevalue");
}
}
}
-controller class -method:
@RequestMapping(value="loginaction", method=RequestMethod.POST)
public String loginaction(HttpServletRequest request, Model model, BindingResult bindingResult, MemberModel mmodel){
HttpSession session = request.getSession();
System.out.println("loginaction★★★★★★★★★"+bindingResult);
new loginvalidator().validate(mmodel, bindingResult);
if(bindingResult.hasErrors()){
return "redirect:/loginform?badpassword=true";
}
//로그인 로직 시행
int no = Integer.parseInt(request.getParameter("no"));
String password= request.getParameter("password");
System.out.println("loginaction 진입 아이디:"+no+" 비번: "+password);
MemberModel membermodel = m.login(no);
if(membermodel.getPassword().equals(password)){
ArrayList<MemberModel> list=m.memberlist();
System.out.println(list);
session.setAttribute("loginflag", "true");
session.setAttribute("name", membermodel.getName());
session.setAttribute("no", membermodel.getNo());
model.addAttribute("memberlist",list);
return "memberlist";
}else{
return "redirect:/loginform?failflag=true";
}
}
