spring mvc: Hibernate验证器（字段不能为空，在1-150自己）

spring mvc: Hibernate验证器（字段不能为空，在1-150自己）

准备：

下载Hibernate Validator库 - Hibernate Validator。解压缩hibernate-validator-5.3.4.Final.jar

在/WEB-INF/下新建classes文件夹

访问地址：

http://localhost:8080/gugua3/student/index

项目:gugua3

包名: springtest

这里用到了hibernate-validator包中的，Range范围随机数注解，NotEmpty不为空注解

例如：

import org.hibernate.validator.constraints.NotEmpty;
import org.hibernate.validator.constraints.Range;

public class Student {

	@NotEmpty
	private String   name;

	@Range(min=10, max=99)
	private Integer age;

	private Integer id;

}

　　

配置文件：web.xml,applicationContext,springtest-servlet.xml

web.xml

<web-app>
  <display-name>Archetype Created Web Application</display-name>

<!--配置文件路径-->
<context-param>
 	<param-name>contextConfigLocation</param-name>
	<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>

<!-- 字符过滤器 -->
<filter>
   <filter-name>encodingFilter</filter-name>
   <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
   <init-param>
       <param-name>encoding</param-name>
       <param-value>UTF-8</param-value>
   </init-param>
</filter>
<filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping> 

<!-- 监听转发 -->
<listener>
	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
    <servlet-name>springtest</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>springtest</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>    

</web-app>

　　

springtest-servlet.xml

<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">

<bean class="org.springframework.context.support.ResourceBundleMessageSource" id="messageSource">
      <property name="basename" value="messages"/>
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <property name="prefix" value="/WEB-INF/jsp/" />
      <property name="suffix" value=".jsp" />
</bean>		

</beans>

　　

applicationContext.xml

<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">

<!-- 默认：注解映射支持 -->
<mvc:annotation-driven/>
<!-- 静态资源配置 -->
<mvc:resources location="/pages/**" mapping="/pages/"/>

<!-- 自动扫描包名,controller -->
<context:component-scan base-package="springtest"/>		

</beans>

　　

Student.java

package springtest;

import org.hibernate.validator.constraints.NotEmpty;
import org.hibernate.validator.constraints.Range;

public class Student {

	@NotEmpty
	private String   name;

	@Range(min=10, max=99)
	private Integer age;

	private Integer id;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public Integer getAge() {
		return age;
	}

	public void setAge(Integer age) {
		this.age = age;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

}

　　

StudentController.java

package springtest;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import org.springframework.validation.annotation.Validated;
import org.springframework.validation.BindingResult;

@Controller
public class StudentController {

	@RequestMapping(value="/student/index", method=RequestMethod.GET)
	public ModelAndView student()
	{
		return new ModelAndView("student_index2", "command", new Student());
	}

	@ModelAttribute("student")
	public Student createStudent()
	{
		return new Student();
	}

	@RequestMapping(value="/student/addStudent", method=RequestMethod.POST)
	public String addStudent(@ModelAttribute("student") @Validated Student student,
	BindingResult result, Model model)
	{
		if(result.hasErrors())
		{
			return "student_index2";
		}
		model.addAttribute("name", student.getName());
		model.addAttribute("age", student.getAge());
		model.addAttribute("id", student.getId());
		return "student_result2";
	}

}

　　

student_index.jsp

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<!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=utf-8">
<title>student index</title>
</head>
<style>
.error {
   color: #ff0000;
}

.errorblock {
   color: #000;
   background-color: #ffEEEE;
   border: 3px solid #ff0000;
   padding: 8px;
   margin: 16px;
}
</style>
<body>

<h2>学生信息</h2>
<form:form method="post" action="/gugua3/student/addStudent" commandName="student">
<form:errors path="*" cssClass="errorblock" element="div" />
<table>
	<tr>
		<td><form:label path="name">姓名</form:label></td>
		<td><form:input path="name"/></td>
		<td><form:errors path="name" cssClass="error"/></td>
	</tr>
	<tr>
		<td><form:label path="age">年龄</form:label></td>
		<td><form:input path="age"/></td>
		<td><form:errors path="age" cssClass="error"/></td>
	</tr>
	<tr>
		<td><form:label path="id">编号</form:label></td>
		<td colspan="2"><form:input path="id"/></td>
	</tr>
	<tr>
		<td colspan="3">
		<input type="submit" vlaue="提交"/>
		</td>
	</tr>
</table>
</form:form>

</body>
</html>

　　

student_result.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"    pageEncoding="utf-8"%>
<%@ page isELIgnored="false" %>
<!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=utf-8">
<title>student result</title>
</head>
<body>

<table>
	<tr>
		<td>姓名</td>
		<td>${name}</td>
	</tr>
	<tr>
		<td>年龄</td>
		<td>${age}</td>
	</tr>
	<tr>
		<td>编号</td>
		<td>${id}</td>
	</tr>
</table>

</body>
</html>