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Published 2022. 9. 25. 10:49

Spring MVC - 데이터 변환과 검증2

Spring/Ch2. Spring MVC

Validator

 

객체를 검증하기 위한 인터페이스. 객체 검증기(validator) 구현에 사용

 

 

수동 검증

 

UserValidator.java

package com.fastcampus.app;

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

public class UserValidator implements Validator{

	@Override
	public boolean supports(Class<?> clazz) {
		// TODO Auto-generated method stub
		return User.class.equals(clazz);
	}

	@Override
	public void validate(Object target, Errors errors) {
		 System.out.println("LocalValidator.validate() is called");
		 
		 User user = (User)target;
		 String id = user.getId();
		 
//		 if (id==null || "".equals(id.trim())) {
//			errors.rejectValue("id", "required");
//		}
		 
		 ValidationUtils.rejectIfEmpty(errors, "id", "required");
		 ValidationUtils.rejectIfEmpty(errors, "pwd", "required");
		 
		 if (id==null || id.length() < 5 || id.length() > 12) {
			 errors.rejectValue("id", "invalidLength");
			
		}
	}

}

 

 

 

RegisterController.java

 

package com.fastcampus.app;

import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.beans.propertyeditors.StringArrayPropertyEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class RegisterController {

	@InitBinder
	public void toDate(WebDataBinder binder) {
//		SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
//		binder.registerCustomEditor(Date.class,  new CustomDateEditor(df, false));
		binder.registerCustomEditor(String[].class,  new StringArrayPropertyEditor("#"));

	}
//	@RequestMapping("/register/add")
//	@RequestMapping(value="/register/save", method= {RequestMethod.GET, RequestMethod.POST})
	@GetMapping("/register/add")
	public String register() {
		return "registerForm";
	}

//	@RequestMapping(value="/register/save", method=RequestMethod.POST)
	@PostMapping("/register/save") // Spring 4.3 부터 추가
	public String save(User user, BindingResult result, Model m) throws Exception {

		// 수동 검증 - Validator 를 직접 생성하고, validator() 를 호출
		UserValidator uservalidator = new UserValidator();
		uservalidator.validate(user, result);
		
		// User 객체를 검증한 결과 에러가 있으면, registerForm 을 이용해서 에러를 보여줘야함
		if (result.hasErrors()) {
			return "registerForm";
		}
		// 1. 유효성 검사
//		if (!isValid(user)) {
//
//			String msg = URLEncoder.encode("id를 잘못입력하셨습니다.", "utf-8");
//			m.addAttribute("msg", msg);
//
////			return "redirect:/register/add?msg="+msg; // URL 재작성(rewriting)
//			return "redirect:/register/add";
//		}

		// 2. DB에 신규회원 정보를 저장
		return "registerInfo";
	}

	private boolean isValid(User user) {
		// TODO Auto-generated method stub
		return true;
	}
}

 

 

자동 검증

 

@Valid 사용

package com.fastcampus.app;

import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.beans.propertyeditors.StringArrayPropertyEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class RegisterController {

	@InitBinder
	public void toDate(WebDataBinder binder) {
//		SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
//		binder.registerCustomEditor(Date.class,  new CustomDateEditor(df, false));
		binder.registerCustomEditor(String[].class,  new StringArrayPropertyEditor("#"));
		binder.setValidator(new UserValidator()); // UserValidator 를 WebDataBinder 의 로컬 validator로 등록

	}
//	@RequestMapping("/register/add")
//	@RequestMapping(value="/register/save", method= {RequestMethod.GET, RequestMethod.POST})
	@GetMapping("/register/add")
	public String register() {
		return "registerForm";
	}

//	@RequestMapping(value="/register/save", method=RequestMethod.POST)
	@PostMapping("/register/save") // Spring 4.3 부터 추가
	public String save(@Valid User user, BindingResult result, Model m) throws Exception {

		// 수동 검증 - Validator 를 직접 생성하고, validator() 를 호출
//		UserValidator uservalidator = new UserValidator();
//		uservalidator.validate(user, result);
		
		// User 객체를 검증한 결과 에러가 있으면, registerForm 을 이용해서 에러를 보여줘야함
		if (result.hasErrors()) {
			return "registerForm";
		}
		// 1. 유효성 검사
//		if (!isValid(user)) {
//
//			String msg = URLEncoder.encode("id를 잘못입력하셨습니다.", "utf-8");
//			m.addAttribute("msg", msg);
//
////			return "redirect:/register/add?msg="+msg; // URL 재작성(rewriting)
//			return "redirect:/register/add";
//		}

		// 2. DB에 신규회원 정보를 저장
		return "registerInfo";
	}

	private boolean isValid(User user) {
		// TODO Auto-generated method stub
		return true;
	}
}

 

MavenRpository 에서 Been validation 검색

 

pom.xml

<?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 https://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.fastcampus</groupId>
	<artifactId>app</artifactId>
	<name>firstSpring</name>
	<packaging>war</packaging>
	<version>1.0.0-BUILD-SNAPSHOT</version>
	<properties>
		<java-version>11</java-version>
		<org.springframework-version>5.0.7.RELEASE</org.springframework-version>
		<org.aspectj-version>1.6.10</org.aspectj-version>
		<org.slf4j-version>1.6.6</org.slf4j-version>
	</properties>
	<dependencies>
		<!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
		<dependency>
    		<groupId>javax.validation</groupId>
    		<artifactId>validation-api</artifactId>
    		<version>2.0.1.Final</version>
		</dependency>
	
		<!-- Spring -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${org.springframework-version}</version>
			<exclusions>
				<!-- Exclude Commons Logging in favor of SLF4j -->
				<exclusion>
					<groupId>commons-logging</groupId>
					<artifactId>commons-logging</artifactId>
				 </exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${org.springframework-version}</version>
		</dependency>
				
		<!-- AspectJ -->
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjrt</artifactId>
			<version>${org.aspectj-version}</version>
		</dependency>	
		
		<!-- Logging -->
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-api</artifactId>
			<version>${org.slf4j-version}</version>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>jcl-over-slf4j</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>${org.slf4j-version}</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.15</version>
			<exclusions>
				<exclusion>
					<groupId>javax.mail</groupId>
					<artifactId>mail</artifactId>
				</exclusion>
				<exclusion>
					<groupId>javax.jms</groupId>
					<artifactId>jms</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jdmk</groupId>
					<artifactId>jmxtools</artifactId>
				</exclusion>
				<exclusion>
					<groupId>com.sun.jmx</groupId>
					<artifactId>jmxri</artifactId>
				</exclusion>
			</exclusions>
			<scope>runtime</scope>
		</dependency>

		<!-- @Inject -->
		<dependency>
			<groupId>javax.inject</groupId>
			<artifactId>javax.inject</artifactId>
			<version>1</version>
		</dependency>
				
		<!-- Servlet -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>servlet-api</artifactId>
			<version>2.5</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.1</version>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	
		<!-- Test -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.7</version>
			<scope>test</scope>
		</dependency>        
	</dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-eclipse-plugin</artifactId>
                <version>2.9</version>
                <configuration>
                    <additionalProjectnatures>
                        <projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
                    </additionalProjectnatures>
                    <additionalBuildcommands>
                        <buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
                    </additionalBuildcommands>
                    <downloadSources>true</downloadSources>
                    <downloadJavadocs>true</downloadJavadocs>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.5.1</version>
                <configuration>
                    <source>${java-version}</source>
                    <target>${java-version}</target>
                    <compilerArgument>-Xlint:all</compilerArgument>
                    <showWarnings>true</showWarnings>
                    <showDeprecation>true</showDeprecation>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.codehaus.mojo</groupId>
                <artifactId>exec-maven-plugin</artifactId>
                <version>1.2.1</version>
                <configuration>
                    <mainClass>org.test.int1.Main</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

 

 

GlobalValidator

 

하나의 Validator 로 여러 객체를 검증할 때, 글로벌 Validator 로 등록

 

글로벌 Validator 로 등록하는 방법

 

servlet-context.xml

	<annotation-driven validator="globalValidator"/>
	<beans:bean id="globalVlidator" class="com.fastcampus.app.GlobalValidator"/>
package com.fastcampus.app;

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

public class GlobalValidator implements Validator{

	@Override
	public boolean supports(Class<?> clazz) {
		// TODO Auto-generated method stub
		return User.class.equals(clazz);
	}

	@Override
	public void validate(Object target, Errors errors) {
		 System.out.println("GlobalValidator.validate() is called");
		 
		 User user = (User)target;
		 String id = user.getId();
		 
//		 if (id==null || "".equals(id.trim())) {
//			errors.rejectValue("id", "required");
//		}
		 
		 ValidationUtils.rejectIfEmpty(errors, "id", "required");
		 ValidationUtils.rejectIfEmpty(errors, "pwd", "required");
		 
		 if (id==null || id.length() < 5 || id.length() > 12) {
			 errors.rejectValue("id", "invalidLength");
			
		}
	}

}

 

 

글로벌 Validator 와 로컬 Validator 를 동시에 적용하는 방법

package com.fastcampus.app;

import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

import javax.validation.Valid;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.beans.propertyeditors.StringArrayPropertyEditor;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Validator;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.PostMapping;

@Controller
public class RegisterController {

	@InitBinder
	public void toDate(WebDataBinder binder) {
//		SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
//		binder.registerCustomEditor(Date.class,  new CustomDateEditor(df, false));
		binder.registerCustomEditor(String[].class,  new StringArrayPropertyEditor("#"));
//		binder.setValidator(new UserValidator()); // UserValidator 를 WebDataBinder 의 로컬 validator로 등록
		binder.addValidators(new UserValidator()); // UserValidator 를 WebDataBinder 의 글로벌 validator로 등록
		List<Validator> listValidator = binder.getValidators();
		System.out.println("validator="+listValidator);

	}
//	@RequestMapping("/register/add")
//	@RequestMapping(value="/register/save", method= {RequestMethod.GET, RequestMethod.POST})
	@GetMapping("/register/add")
	public String register() {
		return "registerForm";
	}

//	@RequestMapping(value="/register/save", method=RequestMethod.POST)
	@PostMapping("/register/save") // Spring 4.3 부터 추가
	public String save(@Valid User user, BindingResult result, Model m) throws Exception {

		// 수동 검증 - Validator 를 직접 생성하고, validator() 를 호출
//		UserValidator uservalidator = new UserValidator();
//		uservalidator.validate(user, result);
		
		// User 객체를 검증한 결과 에러가 있으면, registerForm 을 이용해서 에러를 보여줘야함
		if (result.hasErrors()) {
			return "registerForm";
		}
		// 1. 유효성 검사
//		if (!isValid(user)) {
//
//			String msg = URLEncoder.encode("id를 잘못입력하셨습니다.", "utf-8");
//			m.addAttribute("msg", msg);
//
////			return "redirect:/register/add?msg="+msg; // URL 재작성(rewriting)
//			return "redirect:/register/add";
//		}

		// 2. DB에 신규회원 정보를 저장
		return "registerInfo";
	}

	private boolean isValid(User user) {
		// TODO Auto-generated method stub
		return true;
	}
}

 

 

validator=[com.fastcampus.app.GlobalValidator@395a2f3b, com.fastcampus.app.UserValidator@52902ad5]
TRACE: org.springframework.web.method.support.InvocableHandlerMethod - Method [com.fastcampus.app.RegisterController.toDate] returned [null]
GlobalValidator.validate() is called
LocalValidator.validate() is called

 

 

 

MessageSource

 

error_message.properties

required=필수 항목입니다.
required.user.pwd=사용자 비밀번호는 필수 항목입니다.
invalidLength.id=아이디의 길이는 {1}~{2} 사이어야 합니다.

 

<beans:bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
		<beans:property name="basenames">
			<beans:list>
				<beans:value>error_message</beans:value> <!-- /src/main/resources/error_message.properties -->
			</beans:list>
		</beans:property>
		<beans:property name="defaultEncoding" value="UTF-8"/>
	</beans:bean>

 

 

검증 메시지 출력

 

registerForm.jsp

<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%@ page contentType="text/html;charset=utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%@ page import="java.net.URLDecoder" %>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.8.2/css/all.min.css" />
    <style>
        * { box-sizing:border-box; }

        form {
            width:400px;
            height:600px;
            display : flex;
            flex-direction: column;
            align-items:center;
            position : absolute;
            top:50%;
            left:50%;
            transform: translate(-50%, -50%) ;
            border: 1px solid rgb(89,117,196);
            border-radius: 10px;
        }

        .input-field {
            width: 300px;
            height: 40px;
            border : 1px solid rgb(89,117,196);
            border-radius:5px;
            padding: 0 10px;
            margin-bottom: 10px;
        }
        label {
            width:300px;
            height:30px;
            margin-top :4px;
        }

        button {
            background-color: rgb(89,117,196);
            color : white;
            width:300px;
            height:50px;
            font-size: 17px;
            border : none;
            border-radius: 5px;
            margin : 20px 0 30px 0;
        }

        .title {
            font-size : 50px;
            margin: 40px 0 30px 0;
        }

        .msg {
            height: 30px;
            text-align:center;
            font-size:16px;
            color:red;
            margin-bottom: 20px;
        }
        .sns-chk {
            margin-top : 5px; 
        }
    </style>
    <title>Register</title>
</head>
<body>
   <%-- <form action="<c:url value="/register/save"/>" method="POST" onsubmit="return formCheck(this)"> --%>
   <form:form modelAttribute="user">
    <div class="title">Register</div>
    <!-- <div id="msg" class="msg">${param.msg}</div>  -->
    <div id="msg" class="msg"><form:errors path="id"/></div>
    <label for="">아이디</label>
    <input class="input-field" type="text" name="id" placeholder="8~12자리의 영대소문자와 숫자 조합" autofocus>
    <label for="">비밀번호</label>
    <input class="input-field" type="text" name="pwd" placeholder="8~12자리의 영대소문자와 숫자 조합">
    <label for="">이름</label>
    <input class="input-field" type="text" name="name" placeholder="홍길동">
    <label for="">이메일</label>
    <input class="input-field" type="text" name="email" placeholder="example@fastcampus.co.kr"> 
    <label for="">생일</label>
    <input class="input-field" type="text" name="birth" placeholder="2020/12/31">
        <label for="">취미</label>
    <input class="input-field" type="text" name="hobby">
    
    <div class="sns-chk">
        <label><input type="checkbox" name="sns" value="facebook"/>페이스북</label>
        <label><input type="checkbox" name="sns" value="kakaotalk"/>카카오톡</label>
        <label><input type="checkbox" name="sns" value="instagram"/>인스타그램</label>
    </div>
    <button>회원 가입</button>
   </form:form> 
   
   <script>
       function formCheck(frm) {
            var msg ='';

            if(frm.id.value.length<3) {
                setMessage('id의 길이는 3이상이어야 합니다.', frm.id);
                return false;
            }

           return true;
       }

       function setMessage(msg, element){
            document.getElementById("msg").innerHTML = `<i class="fa fa-exclamation-circle"> ${'${msg}'}</i>`;

            if(element) {
                element.select();
            }
       }
   </script>
</body>
</html>

 

 

validate 메서드에 String 배열 추가

package com.fastcampus.app;

import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

public class GlobalValidator implements Validator{

	@Override
	public boolean supports(Class<?> clazz) {
		// TODO Auto-generated method stub
		return User.class.equals(clazz);
	}

	@Override
	public void validate(Object target, Errors errors) {
		 System.out.println("GlobalValidator.validate() is called");
		 
		 User user = (User)target;
		 String id = user.getId();
		 
//		 if (id==null || "".equals(id.trim())) {
//			errors.rejectValue("id", "required");
//		}
		 
		 ValidationUtils.rejectIfEmpty(errors, "id", "required");
		 ValidationUtils.rejectIfEmpty(errors, "pwd", "required");
		 
		 if (id==null || id.length() < 5 || id.length() > 12) {
			 errors.rejectValue("id",  "invalidLength", new String[]{"", "5", "12"}, null);
			
		}
	}

}

 

저작자표시 비영리 변경금지

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