1、需要导入的jar包:
slf4j-api-1.7.21.jar
validation-api-1.0.0.GA.jar
hibernate-validator-4.0.1.GA.jar
2、访问页面编码:
<%@ 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>数据校验</h1> <form action="${pageContext.request.contextPath }/first.do" method="post"> 成绩:<input name="score" /> <span>${scoremsg }</span><br/><br/> 姓名:<input name="name"/><span>${namemsg }</span><br/><br/> 电话:<input name="phone"/><span>${phonemsg }</span><br/><br/> <input type="submit" value="注册"/> </form> </body> </html>
3、applicationContext.xml
<?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 "> <!-- 配置包扫描器--> <context:component-scan base-package="cn.happy.controller"></context:component-scan> <!-- 配置验证器 --> <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>
4、controller控制器
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"); //记录到底是哪个字段验证失败了 //有一个可以侦测到验证错误总数的方法 int errorCount = br.getErrorCount(); if (errorCount>0) { //证明模型验证失败 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 英文版的吻别 return mv ; } }