SpringMVC10数据验证
在之前的案例上面！ 引入需要的验证jar包
创建index.jsp页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <form action="student/addStudent" method="post"> 年龄：<input type="text" name="age"/> ${ageE} <br/> 姓名： <input type="text" name="userName"/>${userNameE}<br/> 电话：<input type="text" name="phone"> ${phoneE}<br/> <input type="submit" value="新增"/> </form> </body> </html>
对应的Student类
import javax.validation.constraints.Max; import javax.validation.constraints.Min; import javax.validation.constraints.NotNull; import javax.validation.constraints.Pattern; import javax.validation.constraints.Size; import org.hibernate.validator.constraints.NotBlank; /** * * @NotNull 作用在基本数据类型上 * @NotBlank 作用在String上 * @NotEmpty 作用在集合上 * @Min 最小值 * @Max 最大值 * @Size 字符串的长度 * @Pattern 自定义验证规则 * */ public class Student { @NotNull(message="年龄不能为空") @Min(value=0,message="年龄不能低于{value}") @Max(value=150,message="年龄不能高于{value}") private Integer age; //年龄 @NotBlank(message="姓名不能为空") @Size(min=6,max=10,message="长度必须在{min}---{max}之间") private String userName; //姓名 @NotBlank(message="手机号不能为空") @Pattern(regexp="^1[345789]\\d{9}$",message="手机格式不正确") private String phone; //电话 public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public String getUserName() { return userName; } public void setUserName(String userName) { this.userName = userName; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public Student(Integer age, String userName, String phone) { super(); this.age = age; this.userName = userName; this.phone = phone; } public Student() { super(); } }
对应的controller
import org.springframework.stereotype.Controller; import org.springframework.validation.BindingResult; import org.springframework.validation.annotation.Validated; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import sun.util.calendar.BaseCalendar; import cn.bdqn.bean.Student; @Controller @RequestMapping("/student") public class StudentController { /** * *@Validated :会对student对象中所有标注 注解的属性进行验证！ *BindingResult:如果 验证出现错误 ，就会把错误信息给这个result * *result.getFieldError("age").getDefaultMessage() *获取我们设置的错误 信息！ * */ @RequestMapping("/addStudent") public ModelAndView addStudent(@Validated Student student,BindingResult result) { System.out.println("进入了 addStudent"); ModelAndView mv=new ModelAndView(); if (result.hasErrors()) { //出现了验证错误 if (result.getFieldError("age")!=null) { //证明age验证有错误 mv.addObject("ageE", result.getFieldError("age").getDefaultMessage()); } if (result.getFieldError("userName")!=null) { //证明userName验证有错误 mv.addObject("userNameE", result.getFieldError("userName").getDefaultMessage()); } if (result.getFieldError("phone")!=null) { //证明phone验证有错误 mv.addObject("phoneE", result.getFieldError("phone").getDefaultMessage()); } mv.setViewName("/index.jsp"); return mv; } mv.setViewName("/success.jsp"); return mv; } }
xml文件
<?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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd "> <!-- 配置springmvc的组件 --> <context:component-scan base-package="cn.bdqn.controller"/> <!-- 开启 注解的方式--> <mvc:annotation-driven validator="myValidator"/> <!-- 生成我们的验证器 --> <bean id="myValidator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"> <property name="providerClass" value="org.hibernate.validator.HibernateValidator"/> </bean> </beans>
