Java Spring MVC 3验证程序未显示错误消息_Java_Forms_Jsp_Spring Mvc_Tiles

Java Spring MVC 3验证程序未显示错误消息

java forms jsp spring-mvc

Java Spring MVC 3验证程序未显示错误消息,java,forms,jsp,spring-mvc,tiles,Java,Forms,Jsp,Spring Mvc,Tiles,我在spring应用程序中显示错误消息时遇到问题。我使用的是spring MVC 3和Apache Tiles。当我在表单中出现错误时，它不会显示错误消息。请帮我听听这段代码 Web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"

我在spring应用程序中显示错误消息时遇到问题。我使用的是spring MVC 3和Apache Tiles。当我在表单中出现错误时，它不会显示错误消息。请帮我听听这段代码

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>SpringExample</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>
                /WEB-INF/spring/dispatcher-servlet.xml
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>  

</web-app>

AccountValidator.java

package com.examples.spring.validator;

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.examples.spring.dto.AccountDTO;

public class AccountValidator implements Validator {

    @Override
    public boolean supports(Class<?> clazz) {
        return AccountDTO.class.isAssignableFrom(clazz);
    }

    @Override
    public void validate(Object result, Errors error) {
        AccountDTO accountDTO = (AccountDTO) result;

        ValidationUtils.rejectIfEmpty(error, "name", "require.name", "Name Requires.");
        ValidationUtils.rejectIfEmpty(error, "password", "require.password", "Password Requires.");
    }

}

我的代码运行良好，但它不会在中显示错误消息

请帮助我。

您需要在要使用验证器的控制器上注册验证器。请参阅：

您需要在要使用验证器的控制器中注册验证器。请参阅：

ValidationUtils.rejectIfEmpty的第三个参数是错误代码。它应该是资源包中实际消息的密钥。如果找不到值，我不知道它的行为。您应该将其更改为使用密钥，并可以选择设置默认消息。请参阅。

此链接中可能重复的感谢AXTv帮助我。此链接中可能重复的感谢AXTv帮助我。我已尝试使用“ValidationUtils.rejectIfEmpty”（错误，“名称”，“要求.名称”，“名称要求”）；ValidationUtils.rejectIfEmpty（错误，“password”、“require.password”、“password Requires”）；'此外，但它仍然不起作用我必须在控制器中设置

@modeldattribute（“formCreate”）

，而不仅仅是它会显示错误消息。我曾尝试过“ValidationUtils.rejectIfEmpty”（错误，“name”，“require.name”，“name Requires”）；ValidationUtils.rejectIfEmpty（错误，“password”、“require.password”、“password Requires”）；'而且，它仍然不工作。我必须在控制器中设置

@modeldattribute（“formCreate”）

，而不仅仅是它会显示错误消息。

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE tiles-definitions PUBLIC
       "-//Apache Software Foundation//DTD Tiles Configuration 2.0//EN"
       "http://tiles.apache.org/dtds/tiles-config_2_0.dtd">
<tiles-definitions>


    <definition name="create_account_success" template="/WEB-INF/jsp/account/SuccessJSP.jsp">
    </definition>

    <definition name="account_create" template="/WEB-INF/jsp/account/testForm.jsp">

    </definition>


</tiles-definitions>

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
    <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
    <form:form id="form" modelAttribute="formCreate" method="post">
    <table>
        <tr>
            <td>Name :</td>
            <td><form:input path="name"/>
                <form:errors path="name"/>
            </td>
        </tr>
        <tr>
            <td>Password :</td>
            <td><form:input path="password"/>
                <form:errors path="password"/>
            </td>
        </tr>
        <tr>
            <td colspan="2"><input type="submit" /></td>
        </tr>
    </table>
    </form:form>
</body>
</html>

package com.examples.spring.controller;

import org.springframework.stereotype.Controller;
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 org.springframework.web.servlet.ModelAndView;

import com.examples.spring.dto.AccountDTO;
import com.examples.spring.validator.AccountValidator;

@Controller
public class AccountRegistrationController {


    public static final String BASE_URL = "/account";

    @RequestMapping(value = BASE_URL + "/create" ,method = RequestMethod.GET)
    public ModelAndView accountCreate(){
        ModelAndView view = new ModelAndView();
        view.addObject("formCreate", new AccountDTO());
        view.setViewName("account_create");
        return view;
    }

    @RequestMapping(value = BASE_URL + "/create" ,method = RequestMethod.POST)
    public ModelAndView accountRegistration(@ModelAttribute AccountDTO accountDTO,BindingResult result ){

        ModelAndView view = new ModelAndView();

        AccountValidator validator = new AccountValidator();
        validator.validate(accountDTO, result);
        if (result.hasErrors()) {
            view.setViewName("account_create");
            view.addObject("formCreate", accountDTO);
            return view;
        }
        view.setViewName("create_account_success");
        return view;
    }

    @RequestMapping(value = BASE_URL + "/login" ,method = RequestMethod.GET)
    public ModelAndView accountLogin(){
        ModelAndView view = new ModelAndView();
        view.setViewName("account_login");
        return view;
    }
}

package com.examples.spring.validator;

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

import com.examples.spring.dto.AccountDTO;

public class AccountValidator implements Validator {

    @Override
    public boolean supports(Class<?> clazz) {
        return AccountDTO.class.isAssignableFrom(clazz);
    }

    @Override
    public void validate(Object result, Errors error) {
        AccountDTO accountDTO = (AccountDTO) result;

        ValidationUtils.rejectIfEmpty(error, "name", "require.name", "Name Requires.");
        ValidationUtils.rejectIfEmpty(error, "password", "require.password", "Password Requires.");
    }

}

package com.examples.spring.dto;

public class AccountDTO {


    private String name;
    private String password;

    public AccountDTO() {
        // TODO Auto-generated constructor stub
    }

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

}