SpringMVC10数据验证

2022-05-09 06:11:45

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>

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