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SpringBoot使用validator校验


在前台表单验证的时候,通常会校验一些数据的可行性,比如是否为空,长度,身份证,邮箱等等,那么这样是否是安全的呢,答案是否定的。因为也可以通过模拟前台请求等工具来直接提交到后台,比如postman这样的工具,那么遇到这样的问题怎么办呢,我们可以在后台也做相应的校验。

新建项目,因为本文会使用postman模拟前端请求,所以本文需要加入web依赖,pom文件如下:

<?xml version="1.0" encoding="UTF-8"?>
<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.dalaoyang</groupId>
	<artifactId>springboot_validator</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>springboot_validator</name>
	<description>springboot_validator</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.9.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

创建一个demo类,说一下本文使用demo中校验使用的注解:
@NotEmpty:非空
@Length:长度,最长或者最短
@Email:校验email
@Pattern:使用正则校验,本文使用的是身份证的正则
,代码如下:

package com.dalaoyang.entity;

import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotEmpty;

import javax.validation.constraints.Pattern;
import java.io.Serializable;

/**
 * @author dalaoyang
 * @Description
 * @project springboot_learn
 * @package com.dalaoyang.entity
 * @email yangyang@dalaoyang.cn
 * @date 2018/5/1
 */
public class Demo implements Serializable {

    @NotEmpty(message="用户名不能为空")
    @Length(min=6,max = 12,message="用户名长度必须位于6到12之间")
    private String userName;


    @NotEmpty(message="密码不能为空")
    @Length(min=6,message="密码长度不能小于6位")
    private String passWord;

    @Email(message="请输入正确的邮箱")
    private String email;

    @Pattern(regexp = "^(\\d{18,18}|\\d{15,15}|(\\d{17,17}[x|X]))$", message = "身份证格式错误")
    private String idCard;

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getPassWord() {
        return passWord;
    }

    public void setPassWord(String passWord) {
        this.passWord = passWord;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getIdCard() {
        return idCard;
    }

    public void setIdCard(String idCard) {
        this.idCard = idCard;
    }

}

创建一个TestDemoController,来测试本文的校验,代码如下:

package com.dalaoyang.controller;

import com.dalaoyang.entity.Demo;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.validation.Valid;
import java.util.List;

/**
 * @author dalaoyang
 * @Description
 * @project springboot_learn
 * @package com.dalaoyang.controller
 * @email yangyang@dalaoyang.cn
 * @date 2018/5/1
 */
@RestController
public class TestDemoController {

    @PostMapping("/")
    public String testDemo(@Valid Demo demo,BindingResult bindingResult){
        StringBuffer stringBuffer = new StringBuffer();
        if(bindingResult.hasErrors()){
            List<ObjectError> list =bindingResult.getAllErrors();
            for (ObjectError objectError:list) {
                stringBuffer.append(objectError.getDefaultMessage());
                stringBuffer.append("---");
            }
        }
        return stringBuffer!=null?stringBuffer.toString():"";
    }
}

启动项目使用postman分别做了三次请求,第一次所有属性都是随便填写的,如图

第二次输入正确的身份证和邮箱,用户名和密码为空,如图

第三次全部输入正确,如图

本文只是使用的简单的几种校验,Hibernate-validator还有很多种校验的方法,大家可以参考这篇文章https://blog.csdn.net/xgblog/article/details/52548659

源码下载 :大老杨码云

个人网站:https://www.dalaoyang.cn





标签: SPRINGBOOT