表單輸入文本字段不起作用

我有jsp文件並試圖從兩個文本字段插入值。我使用<form:input path="name" />進行輸入，但運行時不顯示文本字段（圖1）。表單輸入文本字段不起作用

<form:form method="POST" commandName="student"> 
     <table> 
      <tr> 
       <td>Enter your name:</td> 
       <td><form:input path="name" /></td> 
       <td><form:errors path="name" cssStyle="color: #ff0000;"/></td> 
      </tr> 
      <tr> 
       <td>Enter your last name:</td> 
       <td><form:input path="lastName" /></td> 
       <td><form:errors path="lastName" cssStyle="color: #ff0000;"/></td> 
      </tr> 
      <tr> 
       <td><input type="submit" name="submit" value="Submit"></td> 
      </tr> 
      <tr> 
     </table> 
    </form:form>

學生控制器

@Controller 
@RequestMapping("/student.htm") 
public class StudentController { 

    @Autowired 
    @Qualifier("studentValidator") 
    private Validator validator; 

    @InitBinder 
    private void initBinder(WebDataBinder binder) { 
     binder.setValidator(validator); 
    } 

    @RequestMapping(method = RequestMethod.GET) 
    public String initForm(Model model){ 
     Student student = new Student(); 
     model.addAttribute("student", student); 
     return "student"; 
    } 

    @RequestMapping(method = RequestMethod.POST) 
    public String submitForm(
     Model model, @Validated Student student, BindingResult result) { 
     String returnVal = "success"; 
     if(result.hasErrors()) { 
      returnVal = "student"; 
     } else { 
      model.addAttribute("student", student); 
     }  
     return returnVal; 
    } 

}

圖片1

來源

2017-05-31 Tje123

包括標籤庫，並從控制器發送命令名（學生）的形式

<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %> 
<form:form method="POST" modelAttribute="student"> 
    <table> 
     <tr> 
      <td>Enter your name:</td> 
      <td><form:input path="name" /></td> 
      <td><form:errors path="name" cssStyle="color: #ff0000;"/></td> 
     </tr> 
     <tr> 
      <td>Enter your last name:</td> 
      <td><form:input path="lastName" /></td> 
      <td><form:errors path="lastName" cssStyle="color: #ff0000;"/></td> 
     </tr> 
     <tr> 
      <td><input type="submit" name="submit" value="Submit"></td> 
     </tr> 
     <tr> 
    </table> 
</form:form>

和@Controller

@RequestMapping(value="/")//your mapped path 
public String indexPage(Model model){ 
    model.addAttribute("student",new Student()); 
    return "index";//your view Name 
} 

@PostMapping("/") 
public String register(@Valid @ModelAttribute("student") Student student,BindingResult result){ 
// your logic 
}

來源

2017-05-31 04:06:32

我接着說：<％@ taglib'和tested.now了500錯誤（發生異常處理JSP頁面[/index.jsp]在[12]行）。在第12行顯示'' – Tje123

yes！你正確的，你需要從你的控制器傳遞命令名（學生） –

我編輯了我的文章，我完全是新的這個，我怎麼傳遞命令？ – Tje123

確保您在您的網頁本文標籤：

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>

來源

2017-05-31 04:15:19

表單輸入文本字段不起作用

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