spring mvc 數據校驗

時間 2019-12-01

標籤 spring mvc 數據校驗欄目 Spring 简体版

原文原文鏈接

一、須要導入的jar包:javascript

slf4j-api-1.7.21.jarhtml

validation-api-1.0.0.GA.jarjava

hibernate-validator-4.0.1.GA.jarjquery

二、訪問頁面編碼：web

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title></title>
    <script type="text/javascript" src="js/jquery-1.8.3.js"></script>
   
  </head>
  
  <body>
    <h1>數據校驗</h1>
    <form action="${pageContext.request.contextPath }/first.do" method="post">
                 成績:<input name="score" /> <span>${scoremsg }</span><br/><br/>
                 姓名:<input name="name"/><span>${namemsg }</span><br/><br/>
               電話:<input name="phone"/><span>${phonemsg }</span><br/><br/>
       <input type="submit" value="註冊"/>
    </form>
  </body>
</html>

三、applicationContext.xmlspring

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" 
    xmlns:tx="http://www.springframework.org/schema/tx" 
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
     xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
        ">
     
   <!-- 配置包掃描器-->
       <context:component-scan base-package="cn.happy.controller"></context:component-scan>
       
       <!-- 配置驗證器 -->
       <bean id="myvalidator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
           <property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property>
       </bean> 
       
       <mvc:annotation-driven validator="myvalidator"/>
</beans>

四、controller控制器api

package cn.happy.controller;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import cn.happy.entity.UserInfo;

@Controller
public class FirstController {
    @RequestMapping("/first.do")
    public ModelAndView doFirst(@Valid UserInfo info,BindingResult br){
        ModelAndView mv=new ModelAndView();
        mv.setViewName("/WELCOME.jsp");
        //記錄究竟是哪一個字段驗證失敗了
        //有一個能夠偵測到驗證錯誤總數的方法
        int errorCount = br.getErrorCount();
        if (errorCount>0) {
            //證實模型驗證失敗
            FieldError score = br.getFieldError("score");
            FieldError name = br.getFieldError("name");
            FieldError phone = br.getFieldError("phone");
            if (score!=null) {
                mv.addObject("scoremsg",score.getDefaultMessage());
            }
            
            if (name!=null) {
                mv.addObject("namemsg",name.getDefaultMessage());
            }
            
            if (phone!=null) {
                mv.addObject("phonemsg",phone.getDefaultMessage());
            }
            mv.setViewName("/index.jsp");
        }
        
        //高中  英文版的吻別
        return mv ;
    }
}

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