Spring MVC表单验证不起作用

Question

我正在按照本指南使用Spring表单验证，但我无法在自己的程序中验证表单。我完全按照指南中的描述去做，但在我的应用程序中却不起作用。

我使用Spring Tools Suite并下载了示例应用程序，以查看它是否真的可以工作。我看不出究竟是什么原因导致表单验证发生在示例应用程序中而不是我的应用程序中。我试图通过从POM中移除依赖项来缓慢地更改示例应用程序，以使其中断，但它继续工作.....到底是哪个库在执行表单验证？

@Controller
public class CreateEventController {

    @RequestMapping(value="/event/create", method=RequestMethod.GET)
    public String showForm(CreateEvent createEvent) {
        return "createEvent";
    }

    @RequestMapping(value="/event/create", method=RequestMethod.POST)
    public String checkEventForm(@Valid CreateEvent createEvent, BindingResult bindingResult){
        if(bindingResult.hasErrors()){
            return "createEvent";
        }
        return "redirect:/";
    }

}

import javax.validation.constraints.NotNull;

public class CreateEvent {

    @NotNull
    private String title;

    private String description;
    private String password;
    private String confirm;

    // public getters and setters

}

形式：

    <form action="#" th:action="@{/event/create}" th:object="${createEvent}" method="post">
        <table>
            <tr>
                <td>Title:</td>
                <td><input type="text" th:field="*{title}" /></td>
                <td th:if="${#fields.hasErrors('title')}" th:errors="*{title}">Title Error</td>
            </tr>
            ... 
            <tr> for the rest of the fields 
            ... 
    </form>

POM：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
    </dependency>       
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <version>1.4.181</version>
    </dependency>
</dependencies>

Answer 1

正如@Hooknc上面所建议那样。以下是验证器的pom

<dependencies>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <!-- javax -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.1.0.Final</version>
    </dependency>
    <!-- Hibernate -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>5.1.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator-annotation-processor</artifactId>
        <version>4.1.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>3.2.10.RELEASE</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>3.2.10.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>3.2.10.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>3.2.10.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>3.2.10.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-expression</artifactId>
        <version>3.2.10.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>3.2.10.RELEASE</version>
    </dependency>
</dependencies>