jsr303 和 Freemarker，有效示例答案

【问题标题】：jsr303 and Freemarker, Valid examplejsr303 和 Freemarker，有效示例
【发布时间】：2015-08-16 18:30:21
【问题描述】：

请帮助对页面 Freemarker 进行验证 jsr 303。有Class Course，Controller，文件messages.properties，创建的bean id = "messageSource"> 我需要在 Freemarker 中创建一个页面来创建一门新课程。填写空字段或范围不正确时输出错误信息。

public class Course {
@NotEmpty 
private String name;
@NotEmpty  
private String category;
@Range(min = 20, max = 25)  
int age;

//get and set
}


NotEmpty.course.name = Name is required!
NotEmpty.course.category= Categoryis required!
Range.course.age = Age value must be between 20 and 25


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

@RequestMapping(value = "/signup", method = RequestMethod.POST)
public String addCustomer(@Valid Course course, BindingResult result) {

    if (result.hasErrors()) {
        return "SignUpForm";
    } else {
        return "Done";
    }

 }

 @RequestMapping(method = RequestMethod.GET)
 public String displayCustomerForm(ModelMap model) {

    model.addAttribute("course", new Course());
    return "SignUpForm";

 }

 }


<!-- bind your messages.properties -->
<bean   class="org.springframework.context.support.ResourceBundleMessageSource"
    id="messageSource">
    <property name="basename" value="messages" />
</bean>

如何制作这个页面？

<html>
<head>
<style>
.error {
color: #ff0000;
}

.errorblock {
color: #000;
background-color: #ffEEEE;
border: 3px solid #ff0000;
padding: 8px;
margin: 16px;
}
</style>
</head>

<body>
<h2>Course:</h2>

<form class="form-horizontal" commandName="course"  method=POST>
    <fieldset>
      <div class="control-group">
        <label class="control-label">Name</label>
        <div class="controls">
          <input id="name" name="name" class="span5" type="text"/>
          <@spring.showErrors "<br>"  />  
        </div>
      </div>


      <div class="control-group">
        <label class="control-label">Description</label>
        <div class="controls">
          <textarea id="description" name="description" class="span5" rows="3"></textarea>
          <@spring.showErrors "<br>"  />
        </div>
      </div>

      </div>
      <div class="form-actions">
        <button id="createButton" name="createButton" class="btn btn-primary" type="submit">Create</button>

      </div>
    </fieldset>
  </form>

</body>
</html>

【问题讨论】：

Validation and Freemarker的可能重复

标签： spring validation freemarker

【解决方案1】：

You should use Spring Form to generate the validations
For this, you have to add spring tag library path in your html

Go like this..

    <%@taglib uri="http://www.springframework.org/tags/form" prefix="sf"%>
     <html> 
    <head>
    <style>
    .error {
    color: #ff0000;
    }

    .errorblock {
    color: #000;
    background-color: #ffEEEE;
    border: 3px solid #ff0000;
    padding: 8px;
    margin: 16px;
    }
    </style>
    </head>

    <body>
    <h2>Course:</h2>

    <sf:form class="form-horizontal" commandName="course"  method=POST>
        <fieldset>
          <div class="control-group">
            <label class="control-label">Name</label>
            <div class="controls">
              <sf:input id="name" name="name" path="name"  class="span5" type="text"/>
              <sf:errors path="name" cssClass="error" />  
            </div>
          </div>


          <div class="control-group">
            <label class="control-label">Description</label>
            <div class="controls">
              <sf:textarea id="category" name="category" path="category"  class="span5" rows="3"></textarea>
              <sf:errors path="category" cssClass="error"/>  
            </div> 
          </div>


 <div class="control-group">
            <label class="control-label">Description</label>
            <div class="controls">
              <sf:textarea id="age" name="age" path="age"  class="span5" rows="3"></textarea>
              <sf:errors path="age" cssClass="error"/>  
            </div> 
          </div>


          </div>
          <div class="form-actions">
            <button id="createButton" name="createButton" class="btn btn-primary" type="submit">Create</button>

          </div>
        </fieldset>
      </form>

    </body>
    </html>

【讨论】：

springframework.org/tags/form" prefix="sf"%> JSP用
但它是 JSP。我必须做freemarker。