使用spring boot将jsp表单插入数据库

Question

我是 Spring Boot 的初学者，我首先创建一个将数据发送到数据库的联系表单。这是表格：

<form:form method="POST" id="contactform" modelAttribute="message">
            <div class="form">
                <div class="six columns noleftmargin">
                <label name="name">Name</label>
                <form:input path="name" type="text"  class="smoothborder" placeholder="Your name *"/>
                </div>
                <div class="six columns">
                <label name="email">E-mail address</label>
                <form:input path="email" type="text"  class="smoothborder" placeholder="Your e-mail address *"/>
                </div>
                <label name="comment">Message</label>
                <form:textarea path="comment" class="smoothborder ctextarea" rows="14" placeholder="Message, feedback, comments *"></form:textarea>
                <input type="submit" id="submit" class="readmore" value="Submit"/>
            </div>
            </form:form>

这是我的联系人控制器：

 @Autowired
  private MessageRepository messageRepository ;

  @RequestMapping(value= "/newmessage", method = RequestMethod.GET)
  public String newMessage(ModelMap model) {
     Message message = new Message();
     model.addAttribute("message", message);
      return  ("/contact");
    }

  @RequestMapping(value="/newmessage",method=RequestMethod.POST)
  public String saveMessage( Message message, BindingResult result, ModelMap model)
  {

      if (result.hasErrors()) {
            return "/contact";
        }

      messageRepository.save(message);
      model.addAttribute("success", "Message " + message.getName() + " "+ message.getEmail() + " "+ message.getComment()+ " registered successfully");
        //return "success";
        return "/homepage";

文件夹结构

Answer 1

您需要设置表单的操作。如果您想在提交表单时点击/newmessage，那么您需要进行如下更改：

<form:form method="POST" id="contactform" action="/newmessage" modelAttribute="message">
     <!-- The elements of the form -->
</form:form>

另外，您需要将modelAttribute 添加到您的控制器方法中。您应该只返回jsp 页面的名称。如果您的页面名称是homepage.jsp，那么您应该只从您的控制器方法中返回homepage。当然，homepage.jsp 文件需要在WEB-INF 文件夹中。

@RequestMapping(value="/newmessage",method=RequestMethod.POST)
public String saveMessage(@ModelAttribute("message") Message message, BindingResult result, ModelMap model) {
    // Rest of the code

    return "homepage";
}