Spring中使用JSR303进行数据校验

本文主要是介绍Spring中使用JSR303进行数据校验，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

刚做完spring的Validator校验，紧接着做spring的JSR303校验，做完后发现差别不是非常大。废话不说，先来项目结构和jar包

1.项目结构和jar包

2.注册页registerForm.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/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>测试JSR303</title>
</head>
<body>



<h3>注册页面</h3>
<form:form modelAttribute="user" method="post" action="login">
<table>
<tr>
<td>登录名：</td>
<td><form:input path="loginname"/></td>
<td><form:errors path="loginname" cssStyle="color:red"/> </td>
</tr>

<tr>
<td>密码：</td>
<td><form:input path="password"/></td>
<td><form:errors path="password" cssStyle="color:red"/> </td>
</tr>

<tr>
<td>用户名：</td>
<td><form:input path="username"/></td>
<td><form:errors path="username" cssStyle="color:red"/> </td>
</tr>

<tr>
<td>年龄：</td>
<td><form:input path="age"/></td>
<td><form:errors path="age" cssStyle="color:red"/> </td>
</tr>

<tr>
<td>邮箱：</td>
<td><form:input path="email"/></td>
<td><form:errors path="email" cssStyle="color:red"/> </td>
</tr>

<tr>
<td>生日：</td>
<td><form:input path="birthday"/></td>
<td><form:errors path="birthday" cssStyle="color:red"/> </td>
</tr>

<tr>
<td>电话：</td>
<td><form:input path="phone"/></td>
<td><form:errors path="phone" cssStyle="color:red"/> </td>
</tr>

<tr>
<td><input type="submit"/></td>
</tr>

</table>
</form:form>

</body>

</html>

3.实体类User.java

package org.fkit.domain;

import java.util.Date;
import javax.validation.constraints.Pattern;
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotBlank;
import org.hibernate.validator.constraints.Range;
import org.springframework.format.annotation.DateTimeFormat;

public class User {

@NotBlank(message="登录名不能为空")
private String loginname;

@NotBlank(message="密码不能为空")
@Length(min=6,max=8,message="密码长度必须在6~8位之间")
private String password;

@NotBlank(message="用户名不能为空")
private String username;

@Range(min=15,max=60,message="年龄必须在15~60岁之间")
private int age;

@Email(message="必须是合法的邮箱地址")
private String email;

@DateTimeFormat(pattern="yyyy-mm-dd")
private Date birthday;

@Pattern(regexp="[1][3,8][3,6,9][0-9]{8}",message="无效的电话号码")
private String phone;

//省略set和get方法…

}

4.控制器UserController.java

package org.fkit.controller;

import javax.validation.Valid;
import org.fkit.domain.User;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class UserController {

@RequestMapping(value="/{formName}")

public String loginForm(@PathVariable String formName,Model model){

/**
* 这里要注意的是，因为jsp页面中绑定了名为user 的对象，
* 所以我们必须在这里提供一个User对象并放在域中，否则会报IllegalStateException异常，下同。
* */

User user = new User();
model.addAttribute("user", user);
//动态跳转页面
return formName;
}

//数据校验使用@Valid，后面跟着Errors对象保存校验信息
@RequestMapping(value="/login",method=RequestMethod.POST)
public String login(@Valid @ModelAttribute User user,
Errors errors,Model model) {
//如果errors中有错，则返回注册页
if(errors.hasErrors()) {
return "registerForm";
}

//否则跳转到成功页
model.addAttribute("user", user);
return "success";
}

}

5.成功页success.jsp

<%@ 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=UTF-8">
<title>测试JSR303</title>
</head>
<body>
<h3>测试JSR303</h3>
登录名：${requestScope.user.loginname }<br>
密码：${requestScope.user.password }<br>
用户名：${requestScope.user.username }<br>
年龄：${requestScope.user.age }<br>
邮箱：${requestScope.user.email }<br>
生日：${requestScope.user.birthday }<br>
电话：${requestScope.user.phone }
</body>
</html>

6.配置文件

springmvc-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
http://mybatis.org/schema/mybatis-spring
http://mybatis.org/schema/mybatis-spring.xsd">


<context:component-scan base-package="org.fkit"/>


<mvc:annotation-driven/>

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="prefix">
<value>/WEB-INF/content/</value>
</property>

<property name="suffix">
<value>.jsp</value>
</property>
</bean>

</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>JSR303Test</display-name>


<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>


<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>


<filter>
<filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>

小结：只要细心点，然后跟着书上来，理论上是不会错了。这次的代码中我遇到了一个错误：

Caused by: java.lang.NoClassDefFoundError: javax/validation/ParameterNameProvider

去网上查了一下，说的是包不匹配，具体如下：

所以呢，遇到错误，如果没有思路，那么马上百度才是最省时间的做法。

================================================================

以下是用maven进行实现相同的功能。

首先看一下项目结构：

-------------------------------------------------------

2.由于是一个例子，所以其代码可以说完全一样，只不过jar包交由maven管理罢了。

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.lin</groupId><artifactId>JSR303_MavenTest</artifactId><version>0.0.1-SNAPSHOT</version><packaging>war</packaging><dependencies>  <!-- spring begin -->  <!--spring-core-->    <dependency>  <groupId>org.springframework</groupId>  <artifactId>spring-core</artifactId>  <version>4.2.0.RELEASE</version>  </dependency>  <!-- spring-web-mvc -->  <dependency>  <groupId>org.springframework</groupId>  <artifactId>spring-webmvc</artifactId>  <version>4.2.0.RELEASE</version>  </dependency>  <!-- spring end -->  <!-- Hibernate Validator  Begin --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-validator</artifactId><version>5.2.4.Final</version></dependency> <!-- <dependency><groupId>org.hibernate</groupId><artifactId>hibernate-validator-cdi</artifactId><version>6.0.7.Final</version></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-validator-annotation-processor</artifactId><version>6.0.7.Final</version></dependency> --><!--  Hibernate Validator  End --><!-- jstl begin--><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>1.1.2</version></dependency><!-- jstl end --></dependencies>  <!-- 添加项目jdk编译插件 -->  <build>  <!-- 设置编译版本为1.8 -->  <plugins>  <plugin>  <groupId>org.apache.maven.plugins</groupId>  <artifactId>maven-compiler-plugin</artifactId>  <configuration>  <source>1.8</source>  <target>1.8</target>  <encoding>UTF-8</encoding>  </configuration>  </plugin>  <!-- 配置tomcat7的插件，如果使用maven的命令方式运行，则命令为：tomcat7:run ，  而不能是tomcat:run（如果使用该命令，还是会使用maven默认的tomcat来编译运行项目）。  可以直接使用eclipse中的tomcat来运行项目（就是原先没有使用maven时的那样运行项目就可以了，那样的话也不需要配这个插件了）。      -->  <plugin>    <groupId>org.apache.tomcat.maven</groupId>    <artifactId>tomcat7-maven-plugin</artifactId>    <version>2.1</version>    </plugin>  </plugins>  </build>  
</project>

----------------------------------------------------------------------------

其他重复代码不再粘贴，项目依旧可以跑得起来……（今天来复用代码的时候出现了点问题，上面测试的环境是jdk1.8+tomcat8.5。。。然后我今天用公司的jdk1.7+tomcat7.0就跑不动。目前猜测是tomcat的问题。。。）

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