Spring Boot使用@ModelAttribute注释封装表单数据

时间:2019-06-27 14:07:01

标签: java spring spring-boot spring-mvc multipartform-data

背景和上下文

我有一个Spring Boot应用程序,它在嵌入式Tomcat容器中作为可执行JAR运行。该应用程序公开了各种传统的RESTful服务。除了传统的RESTful服务之外,我还需要创建一个与传统servlet更相似的终结点。

  

我将传统的RESTful服务定义为使用标准HTTP方法(GET,POST,PUT等)并接受JSON或XML请求主体(使用适用方法时)并返回JSON或XML的终结点。我定义 traditional ,而不是像servlet那样的终结点,它们接受multipart / form-date并在调用方法后重定向客户端。

此端点签名如下

  1. 接受多部分/表单数据
  2. POST方法
  3. 提交后将用户重定向到分配给referer标头的值的基本网址

发送到该端点的表单数据是从我不拥有或控制的表单中发送的(我已经在下面包含了html表单)。因为表单中有许多奇怪的键/值对,所以我想将提交内容封装在FormSubmission对象中。

代码

下面是用于将数据发送到我的端点的表格

<form novalidate="" accept-charset="UTF-8" action="https://baseurl.com/brochure" enctype="multipart/form-data" id="hsForm_4b5eec88-e83b-474f-9c51-6204df71e5a5" method="POST" class="hs-form stacked hs-form-private hs-form-4b5eec88-e83b-474f-9c51-6204df71e5a5_bc44b3dd-63e5-4a6f-85d2-4c2c4b436bf8" data-form-id="4b5eec88-e83b-474f-9c51-6204df71e5a5" data-portal-id="482700" target="target_iframe_4b5eec88-e83b-474f-9c51-6204df71e5a5" data-reactid=".hbspt-forms-0">
   <input id="firstname-4b5eec88-e83b-474f-9c51-6204df71e5a5" type="text" name="firstname"></div>
   <input id="lastname-4b5eec88-e83b-474f-9c51-6204df71e5a5" type="text" name="lastname"></div>
   <input id="address-4b5eec88-e83b-474f-9c51-6204df71e5a5" type="text" name="address"></div>
   <select id="state-4b5eec88-e83b-474f-9c51-6204df71e5a5" name="state" >
      <option value="" disabled="" selected="" >- Please Select -</option>
      <option value="AL" >Alabama</option>
      <option value="AK">Alaska</option>
   </select>
   <select id="country_custom-4b5eec88-e83b-474f-9c51-6204df71e5a5"  name="country_custom" ">
      <option value="United States">United States</option>
      <option value="Canada">Canada</option>
   </select>
   <input id="zip-4b5eec88-e83b-474f-9c51-6204df71e5a5" class="hs-input" type="text" name="zip"></div>
   <input id="email-4b5eec88-e83b-474f-9c51-6204df71e5a5" class="hs-input" type="email" name="email"></div>
   <select id="want_to_talk_with_an_area_builder_-4b5eec88-e83b-474f-9c51-6204df71e5a5" name="want_to_talk_with_an_area_builder_">
      <option value="Yes">Yes, now please.</option>
      <option value="No">No thank you</option>
   </select>
   <select id="blog_pool_life_2_subscription-4b5eec88-e83b-474f-9c51-6204df71e5a5" name="blog_pool_life_2_subscription"
      <option value="instant">Instant</option>
      <option value="daily">Daily</option>
   </select>
</form>

上面的表单将multipart / form-data发送到以下端点

@PostMapping("/brochure")
public RedirectView post( @ModelAttribute FormSubmission submission, RedirectAttributes attributes, @RequestHeader( value = "referer", required = true ) final String referer ) {

    String base = getBaseURL( referer );

    System.out.println( submission.getLastName() );

    return new RedirectView( base );
}

FormSubmission类如下

public class FormSubmission {

    private String firstName;
    private String lastName;
    private String street;
    private String city;
    private String state;
    private String zip;
    private String email;
    private String country;
    private Boolean mail;
    private String speakWithBuilder;

    @ModelAttribute("city")
    public String getCity() {
        return city;
    }

    @ModelAttribute("city")
    public void setCity(String city) {
        this.city = city;
    }

    @ModelAttribute("state")
    public String getState() {
        return state;
    }

    @ModelAttribute("state")
    public void setState(String state) {
        this.state = state;
    }

    @ModelAttribute("zip")
    public String getZip() {
        return zip;
    }

    @ModelAttribute("zip")
    public void setZip(String zip) {
        this.zip = zip;
    }

    @ModelAttribute("country_custom")
    public String getEmail() {
        return email;
    }

    @ModelAttribute("country_custom")
    public void setEmail(String email) {
        this.email = email;
    }

    @ModelAttribute("country_custom")
    public String getCountry() {
        return country;
    }

    @ModelAttribute("country_custom")
    public void setCountry(String country) {
        this.country = country;
    }

    @ModelAttribute("blog_pool_life_2_subscription")
    public Boolean isMail() {
        return mail;
    }

    @ModelAttribute("blog_pool_life_2_subscription")
    public void setMail( String mail ) {
        this.mail = mail.toLowerCase().contains( "yes" );
    }

    @ModelAttribute("firstname")
    public String getFirstName() {
        return firstName;
    }

    @ModelAttribute("firstname")
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    @ModelAttribute("lastname")
    public String getLastName() {
        return lastName;
    }

    @ModelAttribute("lastname")
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    @ModelAttribute("address")
    public String getStreet() {
        return street;
    }

    @ModelAttribute("address")
    public void setStreet(String street) {
        this.street = street;
    }

    @ModelAttribute("want_to_talk_with_an_area_builder_")
    public String getSpeakWithBuilder() {
        return speakWithBuilder;
    }

    @ModelAttribute("want_to_talk_with_an_area_builder_")
    public void setSpeakWithBuilder(String speakWithBuilder) {
        this.speakWithBuilder = speakWithBuilder;
    }


}

问题陈述

您可以看到我的端点定义了一个@ModelAttribute FormSubmission submission,并且我的提交对象使用HTML表单中的元素名称来标记每个getter和setter。但是,打印语句显示为空。我发誓这在几天前已经奏效,现在所有值都为null。请指教。

发布脚本#1

为进一步说明,当我如下修改端点签名时

@PostMapping("/brochure")
public RedirectView post( @ModelAttribute("firstname") String firstName, RedirectAttributes attributes, @RequestHeader( value = "referer", required = true ) final String referer ) {

    System.out.println( firstName );
    String base = getBaseURL( referer );


    return new RedirectView( base );
}

并将端点命名为成功打印。我希望这能更好地说明我的问题是关于将这些表单数据键/值对封装在一个对象中。

发布脚本#2

如果我能够成功封装数据:

  1. 从FormSubmission参数中删除@ModelAttribute,然后
  2. 从getSubter和setter方法中删除FormSubmission内部的私有成员变量的@ModelAttribute

这是更好的方法,但是我仍然希望能够使用与Java命名约定一致的变量来命名,而由于我无法控制表单,因此没有ModelAttribute就无法做到这一点

0 个答案:

没有答案