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我在显示错误消息时遇到问题。我使用 Spring MVC 并发送对象 UserForm 之类的表单，并且我想使用 Hibernate 验证器，这是可行的，但我看不到任何错误消息。

这是表单 home.jsp

    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

<html>
<head>
<link rel="stylesheet" type="text/css"
    href="./resources/styles/style.css" media="screen" />
    <title>Home</title>
</head>
<body>
<h1>
    User Form 
</h1>

<form:form action="addUser" commandName="userform" method="get">
    <table>
        <tr>
            <td>Name: </td>
            <td><form:input path="name"/></td>
            <td><form:errors path="name" cssClass="error"/></td>
        </tr>
        <tr>
            <td>Text: </td>
            <td><form:textarea path="text"/></td>
            <td><form:errors path="text" cssClass="error"/></td>
        </tr>
         <tr>
            <td colspan="2">
                <input type="submit" value="Send"/>
            </td>
         </tr>
    </table>
</form:form>
</body>
</html>

有我的控制器 UserController 处理上面的表单

 package cz.solution.controllers;

   import java.util.Date;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
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;
import org.springframework.web.bind.annotation.RequestMethod;
import cz.morosystems.form.UserForm;
import cz.morosystems.tools.JobSheduler;


@Controller
public class UserController {


    @RequestMapping(value="/", method=RequestMethod.GET)
    public String showMyform(Model model) {
        model.addAttribute("userform", new UserForm());
        return "home";
    }  

    @RequestMapping(value = "/addUser")
    public String showFilledForm(@Valid @ModelAttribute("usermessage") UserForm userform, BindingResult result,
                        Model model) {
        userform.setDate(new Date());
        model.addAttribute("userform", userform);
        if(result.hasErrors()){           
            return "/home";
        }else{
            return "displayUser";
        }

    } 
}

用于处理来自 home.jsp 的表单的 UserForm

package cz.solution.form; 

import java.util.Date;    
import org.hibernate.validator.constraints.NotEmpty;    

public class UserForm {
    @NotEmpty
    private String name;
    @NotEmpty
    private String text;
    private Date date;


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }


    public Date getDate() {
        return date;
    }


    public void setDate(Date date) {
        this.date = date;
    }


}

我将此添加到 servlet-context.xml

<beans:bean class="org.springframework.context.support.ResourceBundleMessageSource" id="messageSource">
        <beans:property name="basename" value="messages" />
    </beans:bean>

我在文件夹 src/main/resources 中有 messages.properties

NotEmpty.userForm.name = Name is required!
NotEmpty.userForm.text = Text is required!

当输入之一为空时，将再次显示表单但没有错误消息。我尝试添加到用户窗体

@NotEmpty(message="Name is required")
    private String name;

但再次没有成功。感谢所有提示。

4

1 回答 1

1

解决了！在方法 showFilledForm 中，在 @ModelAttribute 后面给出 @Valid

于 2012-08-17T10:00:57.750 回答