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SpringMVC学习（七）-JSR303数据校验

2017-09-01 16:50 337 查看

当下开发最常用的是JSR303数据校验：

重点步骤：

1）首先要引入jar包

2）配置验证器

3）编写验证器

1.验证器的配置文件

<?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:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"> <!-- 配置自动扫描的包 -->
<context:component-scan base-package="com.springmvc"></context:component-scan>

<!-- 配置视图 BeanNameViewResolver解析器：使用视图的名字来解析视图
order属性越低优先级越高
-->
<bean class="org.springframework.web.servlet.view.BeanNameViewResolver">
<property name="order" value="10" />
</bean>

<!-- 配置视图解析器：如何把handler方法返回值解析为实际视图 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>

<!-- 配置国际化资源文件 -->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basename" value="i18n"></property>
</bean>

<!--  -->
<mvc:default-servlet-handler/>
<mvc:annotation-driven></mvc:annotation-driven>

<!-- 在这里启用转换器 -->
<mvc:annotation-driven conversion-service="conversionService"/>
<!-- 定义自定义类型转换器的bean -->
<bean id="conversionService"
class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
<property name="converters">
<set>
<!-- 这里是我们自己定义的类型转换器 -->
<!-- 注意，这里首字母要小写，因为springmvc帮我们创建bean的时候，是以类名首字母小写命名 -->
<ref bean="employeeConverter"/>
</set>
</property>
</bean>

<!-- 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>

2.封装类(用注解的方式)

package com.springmvc.login;

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;

public class User {

//成绩
@NotNull    //不能为空
@Min(value=0,message="成绩最小值为{value}")    //最小值
@Max(value=100,message="成绩最大值为{value}")    //最大值
private Integer score;
//姓名
@NotNull
@Size(min=6,message="名称至少6个字符")    //字符
private String name;
//成绩
@NotNull
@Pattern(regexp="^1[3,4,5,6,7,8,9]\\d{9}$",message="手机号码格式不正确")
private String phone;
public Integer getScore() {
return score;
}
public void setScore(Integer score) {
this.score = score;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}

}

3.验证类

package com.springmvc.login;

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;

@Controller
public class myController {

@RequestMapping("/first.do")
public ModelAndView firstDo(@Valid User user,BindingResult br)
{
ModelAndView mv=new ModelAndView();
mv.setViewName("welcome");
int count = br.getErrorCount();
if(count>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("login");
}

return mv;
}
}

4.简单jsp页面

<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</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="提交"/>
</form>

</body>
</html>

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标签： spring mvc

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