在web应用程序中，为了防止客户端传来的数据引发程序异常，常常需要对 数据进行验证。输入验证分为客户端验证与服务器端验证。客户端验证主要通过JavaScript脚本进行，而服务器端验证则主要通过Java代码进行验证。
为了保证数据的安全性，一般情况下，客户端和服务器端验证都是必须的
1.导入jar包
SpringMVC支持JSR(Java Specification Result,Java规范提案)303-Bean Validation数据验证规范。而该规范的实现者很多，其中较常用的是Hibernate Validator。需要注意的是，Hibernate Validator是与Hibernate ORM并列的Hibernate的产品之一。这一点从Hibernate官网上所提供的资源形式可以看出他们之间的关系。
hibernate-validator-4.3.1.Final.jar、jboss-logging-3.3.0.jar、validation-api-1.0.0.GA.jar这三个包添加到项目中
2.在applicationContext.xml配置验证器
<?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.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>
3.定义实体类，打注解标记
package cn.entity; import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.NotEmpty;
/**
*
* @author 景佩佩
*
*/
public class UserInfo { //必须是0到100之间
@Min(value=0,message="成绩最小值为{value}")
@Max(value=100,message="成绩最大值为{value}")
private Integer score; //手机号码必须不能为空,必须是以1 开头 第二位3,4,5,6,7,8,9 最后9位随意
@NotEmpty(message="手机号码不允许为空")
@Pattern(regexp="^1[3,4,5,6,7,8,9]\\d{9}$",message="手机号码不正确")
private String phone; //不能为空
//必须是6个字符以上
@NotEmpty(message="用户名不能为空")
@Size(min=6,message="名称至少6个字符")
private String name; public Integer getScore() {
return score;
}
public void setScore(Integer score) {
this.score = score;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
} }
4.在我们的处理器类中进行相应的判断处理
package cn.controller; import javax.validation.Valid; import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView; import cn.entity.UserInfo;
/**
*
* @author 景佩佩
*
*/
@Controller
public class FirstController {
@RequestMapping("/first.do")
public ModelAndView doFirst(@Valid UserInfo info,BindingResult br){
ModelAndView mv=new ModelAndView();
mv.setViewName("/welcome.jsp"); int errorCount = br.getErrorCount();
if (errorCount>0) {
FieldError score = br.getFieldError("score");
FieldError name = br.getFieldError("name");
FieldError phone = br.getFieldError("phone");
if (score!=null) {
mv.addObject("scoremsg",score.getDefaultMessage());
} if (name!=null) {
mv.addObject("namemsg",name.getDefaultMessage());
} if (phone!=null) {
mv.addObject("phonemsg",phone.getDefaultMessage());
}
mv.setViewName("/index.jsp");
} return mv ;
}
}
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title></title>
<script type="text/javascript" src="js/jquery-1.8.3.js"></script> </head> <body>
<h1>数据校验</h1>
<form action="${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>
效果
(welcome.jsp)成功时页面
错误时提醒