验证方法不是从控制器类调用的，而是直接执行的返回语句。自定义验证未执行。
控制器类：
package com.cluster;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class MyController {
@RequestMapping("/")
public ModelAndView index() {
User user = new User();
return new ModelAndView("index","user",user);
}
@RequestMapping(value="/display")
public String display(Model model, @ModelAttribute("user")User
user,BindingResult result) {
System.out.println("intocontroller");
UserValidator userValidator = new UserValidator();
userValidator.validate(user, result);
if(result.hasErrors()) {
System.out.println("into error loop");
return "index";
}
return "redirect:/check";
}
@RequestMapping(value="/check")
public ModelAndView check() {
return new ModelAndView("success");
}
}
验证员类：
package com.cluster;
import org.springframework.validation.Errors;
import org.springframework.validation.Validator;
public class UserValidator implements Validator{
@Override
public boolean supports(Class clazz){
return User.class.equals(clazz);
}
@Override // getting object and bindingresult reference
public void validate(Object target,Errors errors) {
User user =(User)target;
if(user.getFname()==null){
errors.rejectValue("fname","Name shouldnt be null");
}
//validating the field
if(user.getLname()==null){
errors.rejectValue("lname","Name shouldnt be null");
}
}
}
POJO课程：
package com.cluster;
public class User {
private String fname;
private String lname;
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
public String getLname() {
return lname;
}
public void setLname(String lname) {
this.lname = lname;
}
}
它进入控制器方法但用户验证类的对象没有执行。
请向我解释如何在Stack Overflow上发布问题，它告诉我格式化代码。