Spring和Hibernate表单验证错误未显示_Spring_Forms_Validation_Bean Validation_Hibernate Validator

Spring和Hibernate表单验证错误未显示

spring forms validation

Spring和Hibernate表单验证错误未显示,spring,forms,validation,bean-validation,hibernate-validator,Spring,Forms,Validation,Bean Validation,Hibernate Validator,这是我使用for as bean的customer.java类 package com.zeeshan.form; import javax.validation.constraints.NotNull; import javax.validation.constraints.Size; public class Customer { private String firstName; @NotNull(message="is required") @Size(m

这是我使用for as bean的

customer.java

类

package com.zeeshan.form;

import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;

public class Customer {

    private String firstName;

    @NotNull(message="is required")
    @Size(min=1)
    private String lastName;


    public String getFirstName() {
        return firstName;
    }


    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }


    public String getLastName() {
        return lastName;
    }


    public void setLastName(String lastName) {
        this.lastName = lastName;
    }


}

CustomerController.java

package com.zeeshan.form;

import javax.validation.Valid;

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;

@Controller
@RequestMapping("/customer")
public class CustomerController {

    @RequestMapping("/showForm")
    public String showFormModel(Model theModel) {
        theModel.addAttribute("customer", new Customer());
        return "customer-form";
    }

    @RequestMapping("/processForm")
    public String processForm(@ModelAttribute("customer") @Valid Customer theCustomer, BindingResult theBindingresult) {

        if(theBindingresult.hasErrors()) {
            return "customer-form";
        }
        else {

            return "customer-confirmation";
        }

    }
}

customer form.jsp

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
<style>
    .error{
        color: red;
    }
</style>
</head>
<body>
    <h2>Customer Registeration Form</h2>
    <form:form action="processForm" modelAttribute="customer">
        First Name : <form:input path="firstName"/>
        <br><br>

        Last Name (*) : <form:input path="lastName"/>
        <form:errors path="lastName" cssClass="error" />
        <br><br>
        <input type="submit" value="Submit" />
    </form:form>
</body>
</html>

代码看起来不错。阅读您的问题，您似乎对这两个问题有点困惑：

：实施

JPA

：实现

Bean验证

因此，要使

Bean验证

工作，您需要在类路径中添加

Hibernate验证程序

。意味着只需将其添加到您的

build.gradle

pom.xml

的依赖项中，即您的构建工具的构建脚本中。

在BindingResult中是否有任何绑定错误？不，我没有得到任何绑定结果错误，这就是为什么我感到困惑的原因，然后可能是hibernate validator jar丢失。请检查maven dependencies中的jar。我是手动添加所有JAR，然后是视频讲座，但我仍然得到了相同的条件是亲爱的，我手动添加所有JAR hibernate validator和springs JAR常见日志JAR等等，我在视频讲座之后，但我看到没有显示相同的条件错误，所以这就是我感到困惑的原因。@ZeeshanMemon:您的代码似乎没问题。请检查您添加的jar文件是否已正确添加。

hibernate version 6.0.2

spring version 5.0.6