------------吾亦无他,唯手熟尔，谦卑若愚，好学若饥-------------
校验有三种：前台页面校验（例如js和h5），后台校验，数据库校验
但是一般能不用数据库校验就不用数据库校验，因为性能损耗严重，
所以，我们用前台和后台俩种，可以说最好，绝大部分情况下，前台后台都要写，如果一个用户比较搞事，直接把它浏览器上的js给禁用掉了，那么如果没有后台校验，他将直接杀向数据库
很多人一提hibernate就说，哦，是一个框架，ORM框架，数据库访问层的框架，SSH的那个H！！！！
这个答案其实很一般，HibernateORM是Hibernate框架其中的一个重要的组成部分之一，像其它的例如hibernate-validator这个校验框架其实很不错
好了，不扯皮了，说说怎么用。。。。。。。
案例：
一，引入jar包
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3..Final</version>
</dependency> <!--validation api-->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0..GA</version>
</dependency>
也不知道大家看到了没有，由于是maven项目，只需要俩个节点就好，它会自动引入相关联的jar，如果不是maven，或者maven不好用，则还需要再引俩个jar，我把全部jar包的节点放上来
<!--数据验证-->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.0..GA</version>
</dependency> <!--jboss logging-->
<dependency>
<groupId>org.jboss.logging</groupId>
<artifactId>jboss-logging</artifactId>
<version>3.3..Final</version>
</dependency> <!--validation api-->
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0..GA</version>
</dependency> <!--slf4j api-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.</version>
</dependency>
数据校验全部的jar，合起来
二，自己的大配置文件xml，里面需要新配置一个验证器，并且绑定注解驱动
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"> <!--包扫描器-->
<context:component-scan base-package="cn.dawn.day23validator"></context:component-scan>
<!--视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/day23/"></property>
<property name="suffix" value=".jsp"></property>
</bean> <!--验证器-->
<bean id="myvalidator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
<!--注入hibernate的验证器-->
<property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property>
</bean> <!--绑定注解驱动-->
<mvc:annotation-driven validator="myvalidator"></mvc:annotation-driven> </beans>
三，修改web.xml*调度器的上下文配置位置为上面那个配置文件
四，建一个实体类：里面用注解做校验，很好理解，有些用正则
package cn.dawn.day23validator; import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.format.annotation.DateTimeFormat; import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;
import java.util.Date; /**
* Created by Dawn on 2018/3/31.
*/
public class UserInfo {
@NotEmpty(message = "用户名不能为空")
@Size(min = ,max = ,message = "用户名的长度必须在{min}-{max}之间")
private String username; @Max(value = ,message = "最老150岁")
@Min(value = ,message = "最小0岁")
private Integer userage; @NotEmpty(message = "手机号码不能为空")
@Pattern(regexp = "^1[3|5|7|8|9]\\d{9}$",message = "手机号码格式不正确")
private String userphone;
@NotEmpty(message = "邮箱不能为空")
@Pattern(regexp = "^\\w+@\\w+\\.\\w+$",message = "邮箱格式不正确")
private String email; public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
} public Integer getUserage() {
return userage;
} public void setUserage(Integer userage) {
this.userage = userage;
} public String getUserphone() {
return userphone;
} public void setUserphone(String userphone) {
this.userphone = userphone;
} public String getEmail() {
return email;
} public void setEmail(String email) {
this.email = email;
}
}
五，自定义的处理器和处理方法
package cn.dawn.day23validator; import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView; import javax.validation.Valid; /**
* Created by Dawn on 2018/3/31.
*/
@Controller
public class ValidatorController {
@RequestMapping("/validatorZC")
public String validatorZC(@Valid UserInfo userInfo, BindingResult br, Model model){
//判定br中错误数是否大于0，如果true，证明有一个验证失败了
if (br.getErrorCount()>){
FieldError userage=br.getFieldError("userage");
FieldError username=br.getFieldError("username");
FieldError userphone=br.getFieldError("userphone");
FieldError email=br.getFieldError("email"); //哪个验证失败，就回显示哪个
if(userage!=null){
String useragemsg = userage.getDefaultMessage();
model.addAttribute("useragemsg",useragemsg);
}
if(username!=null){
String usernamemsg = username.getDefaultMessage();
model.addAttribute("usernamemsg",usernamemsg);
}
if(userphone!=null){
String userphonemsg = userphone.getDefaultMessage();
model.addAttribute("userphonemsg",userphonemsg);
}
if(email!=null){
String emailmsg = email.getDefaultMessage();
model.addAttribute("emailmsg",emailmsg);
} //这个if里面就是肯定有错误，回显示名字
model.addAttribute("username",userInfo.getUsername());
/*返回注册页面*/
return "validator";
}
/*注册成功*/
return "success"; }
}
六，jsp页面
6.1validator.jsp页面
<%--
Created by IntelliJ IDEA.
User: Dawn
Date: //
Time: :
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>Title</title>
</head>
<body> <h1>数据校验</h1>
<form action="${pageContext.request.contextPath}/validatorZC" method="post">
年龄:<input name="userage" /> <span>${useragemsg }</span><br/><br/>
姓名:<input name="username" value="${username}"/><span>${usernamemsg }</span><br/><br/>
电话:<input name="userphone"/><span>${userphonemsg }</span><br/><br/>
邮箱:<input name="email"/> <span>${emailmsg}</span><br/><br/>
<input type="submit" value="注册"/>
</form>
</body>
</html>
6.2success.jsp页面
<%@ page language="java" pageEncoding="utf-8" isELIgnored="false" %>
<html>
<body>
<%--<img src="data:image/1.jpg">--%>
<h2>Success!</h2>
</body>
</html>
七，启动tomcat，访问validator.jsp页面
有什么不懂的，联系我，原作者：晨曦Dawn
转载请注明出处 http://www.cnblogs.com/DawnCHENXI/p/8684167.html