跟杨春娟学SpringMVC笔记：Form表单之JSR303验证

完成：第一遍

1.如何使用JSR303验证要先导入validation-api和hibernate-validator的依赖jar包？

在pom.xml导入validation-api和hibernate-validator的依赖jar包

<dependencies><dependency><groupId>javax.validation</groupId><artifactId>validation-api</artifactId><version>1.1.0.Final</version></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-validator</artifactId><version>5.4.1.Final</version></dependency></dependencies>

2.如何使用JSR303验证要在springmvc-serlvet.xml中添加namespace和依赖地址？

主要是加入xmlns:mvc的namespace和schemaLocation

<?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:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 配置扫描的包 --><context:component-scan base-package="com.form"/><!-- 配置视图解析器 --><bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/pages/"></property><property name="suffix" value=".jsp"></property></bean><!-- 加载外部的语言文件 --><bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource"><!-- 提示信息文件地址 --><property name="basename" value="classpath:message"></property><property name="useCodeAsDefaultMessage" value="false"></property><!-- 需要国际化的内容编码都需要使用UTF-8 --><property name="fileEncodings" value="UTF-8"></property><property name="cacheSeconds" value="120"></property></bean><bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"><property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property><property name="validationMessageSource" ref="messageSource"></property></bean><bean id="conversion" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"/><mvc:annotation-driven validator="validator" conversion-service="conversion"></mvc:annotation-driven>
</beans>

3.如何在UserForm上加验证注解？

package com.adbycool.form;import java.util.Date;
import java.util.List;import javax.validation.constraints.Future;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.Past;
import javax.validation.constraints.Pattern;import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.format.annotation.DateTimeFormat;public class UserForm {@NotEmpty(message="{id.validator}")private String id;@Length(min=3, max=10, message="{name.validator}")private String name;@NotEmpty(message="{password.required}")@Length(min=6, max=10, message="{password.validator}")private String password;@NotEmpty(message="{password.required}")@Length(min=6, max=10, message="{password.validator}")private String repeatPassword;@Min(1)@Max(110)private int age;@Pattern(regexp="[1][3|4|5|7|8][0-9]{9}$", message="{phone.validator}")private String phoneNumber;private String gender;private List<String> hobby;private String country;private String remark;//@Future@Past(message="{birthday.validator}")@DateTimeFormat(pattern="yyyy/MM/dd")private Date birthday;@Emailprivate String email;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getRepeatPassword() {return repeatPassword;}public void setRepeatPassword(String repeatPassword) {this.repeatPassword = repeatPassword;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getPhoneNumber() {return phoneNumber;}public void setPhoneNumber(String phoneNumber) {this.phoneNumber = phoneNumber;}public String getGender() {return gender;}public void setGender(String gender) {this.gender = gender;}public List<String> getHobby() {return hobby;}public void setHobby(List<String> hobby) {this.hobby = hobby;}public String getCountry() {return country;}public void setCountry(String country) {this.country = country;}public String getRemark() {return remark;}public void setRemark(String remark) {this.remark = remark;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}}

4.如何在src/main/resources下面放message.properties属性文件来配置存放提示信息？

message.properties

id.validator=id is required
name.validator=name length must be between 3 and 10
password.required=password is required
password.validator=password length must be between 6 and 10
Min.userForm.age=the min value of age is 1
Max.userForm.age=the max value of age is 110
phone.validator=phone format is error
birthday.validator=birthday should be a past year
repeatPassword.validate=repeat password should be the same with password

5.如何在Controller中使用JSR303验证？

@Valid注解用于校验，所属包为：javax.validation.Valid。

//   表单提交后会提交到control，写一个add入口的方法来处理表单结果
// 参数中BindingResult表示返回值@RequestMapping("add")public String add(@Valid UserForm userForm,BindingResult bindingResult,Model model) {//      如果有错误if(bindingResult.hasErrors()) {return "addUser";}
//      可以通过传来的userForm拿到属性String id = userForm.getId();String name = userForm.getName();
//      通过model将数据传到前台model.addAttribute("id",id);model.addAttribute("name",name);return "success";}

6.@Validated和@Valid用法与区别?

@Validated：提供了一个分组功能，可以在入参验证时，根据不同的分组采用不同的验证机制
@Valid：作为标准JSR-303规范，还没有吸收分组的功能。

@Validated：可以用在类型、方法和方法参数上。但是不能用在成员属性（字段）上
@Valid：可以用在方法、构造函数、方法参数和成员属性（字段）上

两者是否能用于成员属性（字段）上直接影响能否提供嵌套验证的功能

7.addUser.jsp的form表单中加入如果发生错误，怎么显示错误提示？

主要是form-errors标签的作用：< form:errors path=“id” />

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Add User</title>
</head>
<body><h2>Add User</h2><form:form method="POST" action="add"  modelAttribute="userForm"><!-- 这种方式提示所有路径的异常提示 --><%--   <form:errors path="*"></form:errors> --%><table><tr><td><form:label path="id">Id</form:label></td><td><form:input path="id" maxlength="8"/> <form:errors path="id"/></td></tr><tr><td><form:label path="name">Name</form:label></td><td><form:input path="name"/><form:errors path="name"/></td></tr><tr><td><form:label path="password">Password</form:label></td><td><form:password path="password"/><form:errors path="password"/></td></tr><tr><td><form:label path="repeatPassword">Repeat Password</form:label></td><td><form:password path="repeatPassword"/><form:errors path="repeatPassword"/></td></tr><tr><td><form:label path="age">Age</form:label></td><td><form:input path="age"/></td></tr><tr><td><form:label path="phoneNumber">Phone Number</form:label></td><td><form:input path="phoneNumber"/><form:errors path="phoneNumber"/></td></tr><tr><td><form:label path="gender">Gender</form:label></td><td><form:radiobutton path="gender" value="man"/>男<form:radiobutton path="gender" value="woman"/>女</td></tr><tr><td><form:label path="hobby">Hobby</form:label></td><td><form:checkbox path="hobby" value="dancing"/>Dancing<form:checkbox path="hobby" value="singing"/>Singing<form:checkbox path="hobby" value="Printing"/>Printing </td></tr><tr><td><form:label path="country">Country</form:label></td><td><form:select path="country"><form:option value="china">China</form:option><form:option value="japan">Japan</form:option><form:option value="us">US</form:option></form:select> </td></tr><tr><td><form:label path="remark">Remark</form:label></td><td><form:textarea path="remark"/></td></tr><tr><td><form:label path="birthday">Birthday</form:label></td><td><form:input path="birthday"/></td></tr><tr><td><form:label path="email">Email</form:label></td><td><form:input path="email"/></td></tr><tr><td colspan="2"><form:button>Submit</form:button></td></tr></table></form:form>
</body>
</html>

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跟杨春娟学SpringMVC笔记：Form表单之JSR303验证

跟杨春娟学SpringMVC笔记：Form表单之JSR303验证

完成：第一遍

message.properties

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