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HarmonyOS
使用spring @Validated进行验证，并将错误信息返回到页面，代码：
1、定义了model
@Getter
@Setter
public class User {
private String userName;
private String password;
private String email;
}
2、自定义UserValidate
public class UserValidate implements Validator {
@Override
public boolean supports(Class<?> arg0) {
System.out.println("ee:"+arg0+","+User.class.isAssignableFrom(arg0));
return User.class.isAssignableFrom(arg0);
}
@Override
public void validate(Object target, Errors errors) {
//ValidationUtils.rejectIfEmpty(errors, "userName", "user.userName.required", "用户名不能为空");
//ValidationUtils.rejectIfEmpty(errors, "password", "user.password.required", "密码不能为空");
//ValidationUtils.rejectIfEmpty(errors, "email", "user.email.required", "邮箱不能为空");
User user = (User) target;
int length = user.getUserName().length();
if (length > 20) {
errors.rejectValue("userName", "user.userName.too_long", "用户名不能超过{20}个字符");
}
length = user.getPassword().length();
if (length < 6) {
errors.rejectValue("password", "user.password.too_short", "密码太短，不能少于{6}个字符");
} else if (length > 20) {
errors.rejectValue("password", "user.password.too_long", "密码太长，不能长于{20}个字符");
}
int index = user.getEmail().indexOf("@");
if (index == -1) {
errors.rejectValue("email", "user.email.invalid_email", "邮箱格式错误");
}
}
}
3、前端：thymeleaf
<html>
<head>
</head>
<body>
<br /><hr />
<form action="#" th:action="@{/addUser}" method="POST">
userName :<input type="text" name="userName" /><br />
password :<input type="text" name="password" /><br />
email :<input type="text" name="email" /><br />
状态：<div style="font-size:18px;"><span th:text="${result}"></span></div>
<input type="submit" />
</form>
</body>
</html>
4、后端controller
import java.util.List;
import java.util.function.Consumer;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.servlet.ModelAndView;
import com.example.demo.app.model.User;
import com.example.demo.app.validate.UserValidate;
import com.google.common.collect.ImmutableListMultimap;
import com.google.common.collect.ImmutableListMultimap.Builder;
@Controller
public class UserController {
@GetMapping("/userInfo")
public ModelAndView userInfo() {
ModelAndView userView = new ModelAndView("user");
return userView;
}
@PostMapping("/addUser")
public String addBook(@Validated User user,BindingResult result, Model model) {
if(result.hasErrors()){
List<ObjectError> allErrors = result.getAllErrors();
Builder<String, String> builder = ImmutableListMultimap.builder();
allErrors.stream().forEach(new Consumer<ObjectError>() {
@Override
public void accept(ObjectError t) {
builder.put(t.getObjectName(), t.getDefaultMessage());
}
});
ImmutableListMultimap<String, String> build = builder.build();
model.addAttribute("result",build);
}else {
model.addAttribute("result","success");
}
return "user";
}
@InitBinder
public void initBinder(WebDataBinder binder) {
binder.addValidators(new UserValidate());
}
}
5、前端提交后，一致后包异常，异常的结果是ImmutableListMultimap类也进行了UserValidate的验证过程，请问为什么呢