java - 使用 Javax.validation 进行 Spring 验证重定向到 400

Question

我正在开发 Spring-MVC 应用程序，我想验证一些数据。目前我可以毫无问题地验证数据。唯一的问题是，如果数据无效，我想转到另一个 JSP 页面，但现在没有发生这种情况。相反，我收到 Apache 400 错误，请求发送的语法不正确。谁能告诉我验证中还需要实现什么。

Controller :

@RequestMapping(value = "/", method = RequestMethod.GET)
    public String listPersons(Model model) {
        Person person = personService.getCurrentlyAuthenticatedUser();
        if(!(person==null)){
            return "redirect:/canvas/list";
        } else {
            model.addAttribute("person", new Person());
         //   model.addAttribute("listPersons", this.personService.listPersons());
            model.addAttribute("notices",new Notes());
            model.addAttribute("canvases",new Canvas());
            return "person";
        }
    }

    @RequestMapping(value= "/person/add", method = RequestMethod.POST)
    public String addPerson(@Valid Person person,@ModelAttribute("person") Person p,Model model,BindingResult bindingResult){

        if(bindingResult.hasErrors()){
            return "redirect:/";
        }
            this.personService.addPerson(p);
            return "redirect:/";

    }

实体:

@Entity
@Table(name="person")
public class Person implements UserDetails{

    @NotEmpty @Email
    @Column(name = "username")
    private String username;

    @NotEmpty(message = "Please enter password")
    @Column(name = "password")
    private String password;

    @Size(min = 2,max = 30)
    @Column(name = "firstname")
    private String firstName;

    @Size(min = 2,max = 50)
    @Column(name = "secretquestion")
    private String secretquestion;


    @Size(min = 2,max = 500)
    @Column(name = "secretanswer")
    private String secretanswer;
}

JSP:

<tr>
    <td>
        <form:label path="firstName">
            <spring:message text="FirstName"/>
        </form:label>
    </td>
    <td>
        <form:input path="firstName" />
    </td>
    <td><form:errors path="firstName"/>Please enter Firstname properly</td>
</tr>
<tr>
    <td>
        <form:label path="username">
            <spring:message text="Email"/>
        </form:label>
    </td>
    <td>
        <form:input path="username" />
    </td>
    <td><form:errors path="username"/>Please enter Email properly</td>
</tr>
<tr>
    <td>
        <form:label path="password">
            <spring:message text="Password"/>
        </form:label>
    </td>
    <td>
        <form:input path="password" />
    </td>
    <td><form:errors path="password"/>Please enter password properly</td>
</tr>

<tr>
<td>
    <form:label path="secretquestion">
        <spring:message text="secretquestion"/>
    </form:label>
</td>
<td>
    <form:input path="secretquestion" />
</td>
    <td><form:errors path="secretquestion"/>Please enter secretquestion properly</td>
</tr>


<tr>
    <td>
        <form:label path="secretanswer">
            <spring:message text="secretanswer"/>
        </form:label>
    </td>
    <td>
        <form:input path="secretanswer" />
    </td>
    <td><form:errors path="secretanswer"/>Please enter secretanswer properly</td>
</tr>

Servlet-context.xml

 <beans:bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource"/>

Pom.xml

<!-- Validation -->
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.0.0.GA</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>4.3.1.Final</version>
        </dependency>

任何指针都会很好。主要是我想避免使用 Apache 400，而只是显示输入字段到底出了什么问题。

Answer 1

这可能是因为 public String addPerson(@Valid Person person,@ModelAttribute("person") Person p,Model model,BindingResult bindingResult) 签名 。
BindingResult 必须遵循 @ModelAttribute，因为方法签名可能有多个模型对象，Spring 将为每个对象创建一个单独的 BindingResult 实例。这就是为什么当数据无效 spring 无法将错误绑定(bind)到 BindingResult 并抛出 400 错误。

尝试将方法签名更改为 public String addPerson(@Valid Person person,@ModelAttribute("person") Person p,BindingResult bindingResult,Model model)。

了解更多关于 BindingResult .