我目前正在学习springmvc，数据验证看起来很简单，我的问题是：当我输入无效的数据并按下submit按钮时，请求Map方法根本不会启动，它会将我发送到“http status 400–bad request”。我的目标是使用“bindingresult”查看是否有任何错误，但如果输入的数据无效，则方法体不会运行(使用hibernate validatior）。这里有一些代码。
用户对象：
public class User {
@NotNull
@Size(min = 4, max = 25, message = "Must be between 4 and 25 characters")
private String firstName;
@NotNull
@Size(min = 4, max = 25, message = "Must be between 4 and 25 characters")
private String lastName;
@Email
private String email;
@Size(min = 8)
private String userPassword;
}控制器：打开窗体页
@RequestMapping("createAccount")
public String register(Model model) {
model.addAttribute("newUser", new User());
return "register";
}问题来了。这个方法应该在我按下submit按钮时运行，当数据有效时，它会返回userinteface.jsp和所有输入的数据，但是当输入的数据无效时，它会直接将我发送到http status 400-bad request。
@RequestMapping("signUp")
public String signUp(@Valid @ModelAttribute("newUser") User user,
Model model, BindingResult bindingResult) {
model.addAttribute("dbUser", user);
if (bindingResult.hasErrors()) return "register";
return "userinterface";
}这是我的register.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Register</title>
<meta name="description" content="An interactive getting started guide for Brackets.">
<link rel="stylesheet" type="text/css" href="resources/css/main.css" />
<link href="https://fonts.googleapis.com/css2?family=Nova+Round&display=swap" rel="stylesheet">
</head>
<body>
<div class = "container">
<h1>- Register -</h1>
<ul>
<form:form action ="signUp" modelAttribute="newUser">
<form:input path="firstName" class = "cred" placeholder="First Name"/>
<form:errors path="firstName" cssClass="error"/><br><br>
<form:input path="lastName" class = "cred" placeholder="Last Name"/><br><br>
<form:errors path="lastName" cssClass="error"></form:errors><br><br>
<form:input path="email" class = "cred" placeholder="E-mail"/>
<form:errors path = "email" cssClass="error"/><br><br>
<form:password path="userPassword" class = "cred" placeholder="Password"></form:password><br><br>
<form:errors path="userPassword" cssClass="error"/>
<form:input path="age" type = "number" class = "cred" placeholder="Age"/><br><br>
- <input type ="submit" class = "submitButton" value = "Add User"> -<br><br>
<a href = index.jsp>cancel</a>
</form:form>
</ul>
</div>
</body>
</html>
1条答案
按热度按时间mnemlml81#
问题出在方法参数上。我已经把用户，模型，绑定结果。其中应该是user、bindingresult、model，所以基本上绑定结果必须紧跟在user对象之后。
道路：
正确的方法：
我想知道为什么这些问题总是只发生在我身上！