Spring 커스텀 태그 / 로그인 유효성 체크

파일 위치

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <context-param>
    <param-name>defaultHtmlEscape</param-name>
    <param-value>false</param-value>
  </context-param>
  <servlet>
    <servlet-name>dispatcherInternal</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherInternal</servlet-name>
    <url-pattern>/jsp/*</url-pattern>
  </servlet-mapping>
   <servlet>
    <servlet-name>dispatcherNonHtml</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherNonHtml</servlet-name>
    <url-pattern>/download/*</url-pattern>
  </servlet-mapping> 
  <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>
</web-app>

dispatcherInternal-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-3.0.xsd">

	<!-- 커스텀 태그 이용 -->
 	<bean class="madvirus.spring.chap07.controller.LoginController">
 		<property name="authenticator">
 			<bean class="madvirus.spring.chap07.controller.MockAuthenticator"/>
 		</property>
 	</bean>
	
	<!-- View 글로벌 설정 -->
	<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/viewjsp/" />
		<property name="suffix" value=".jsp"/>
	</bean>
	
	<!-- 리소스 번들 지정 -->
	<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
		<property name="basenames">
			<list>
				<value>messages.validation</value>
				<value>messages.label</value>
			</list>
		</property>
	</bean>
</beans>

AuthenticationException.java

package madvirus.spring.chap07.controller;

public class AuthenticationException extends RuntimeException {

	private static final long serialVersionUID = 1L;

	public AuthenticationException(String message) {
		super(message);
	}

}

Authenticator.java

package madvirus.spring.chap07.controller;

public interface Authenticator {
	
	void authenticate(String id,String password);
}

LoginCommand.java

package madvirus.spring.chap07.controller;

public class LoginCommand {
	private String id;
	private String password;
	private String loginType;
	
	
	public String getId() {
		return id;
	}
	public void setId(String id) {
		this.id = id;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getLoginType() {
		return loginType;
	}
	public void setLoginType(String loginType) {
		this.loginType = loginType;
	}
}

LoginCommandValidator.java

package madvirus.spring.chap07.controller;

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

public class LoginCommandValidator implements Validator{

	public void validate(Object target, Errors errors) {
		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "id", "required");
		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "password", "required");
		ValidationUtils.rejectIfEmptyOrWhitespace(errors, "loginType", "required");
	}

	public boolean supports(Class<?> clazz) {
		return LoginCommand.class.isAssignableFrom(clazz);
	}
}

ValidationUtils.rejectIfEmptyOrWhitespace

비어있거나 공백일 경우(?)

LoginController .java

package madvirus.spring.chap07.controller;

import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/login/login.do")
public class LoginController {

	private Authenticator authenticator;
 
	@ModelAttribute("login")
	public LoginCommand formBacking() {
		return new LoginCommand();
	}

	@RequestMapping(method = RequestMethod.GET)
	public String form() {
		return "loginForm";
	}

	@RequestMapping(method = RequestMethod.POST)
	public String submit(@ModelAttribute("login") LoginCommand loginCommand,
			BindingResult result) {
		new LoginCommandValidator().validate(loginCommand, result);

		if (result.hasErrors()) {
			return "loginForm";
		}
		try {
			authenticator.authenticate(loginCommand.getId(),
					loginCommand.getPassword());

			return "loginSuccess";
		} catch (AuthenticationException ex) {
			result.reject("invalidIdOrPassword",
					new Object[] { loginCommand.getId() }, null);
			return "loginForm";
		}
	}

	@ModelAttribute("loginTypes")
	protected List<String> referenceData() throws Exception{
		List<String> loginTypes = new ArrayList<String>();
		loginTypes.add("일반회원");
		loginTypes.add("기업회원");
		loginTypes.add("헤드헌터 회원");
		return loginTypes;
	}
	
	public void setAuthenticator(Authenticator authenticator){
		this.authenticator = authenticator;
	}
}

try/catch 부분에
예외 발생이 되면 loginform으로 다시 리턴되어지고
try 부분에서 실행이 되어지면은 success로 이동되어 진다

MockAuthenticator .java

package madvirus.spring.chap07.controller;

public class MockAuthenticator implements Authenticator{

	public void authenticate(String id, String password) {
		if(!id.equals("madvirus"))
			throw new AuthenticationException("invalid id"+id);
	}
}

label_en.properties

login.form.title=Login Form
login.form.type=Login Type
login.form.id=ID
login.form.password=Password
login.form.submit=Login

label.properties

login.form.title=로그인
login.form.type=로그인 타입
login.form.id=회원Id
login.form.password=비밀번호
login.form.submit=전송

validation_en.properties

required=required
required.login.id=login id is required
required.login.password=login password is requreid
required.login.loginType=You have to select login type
invalidIdOrPassword.login=Login id and password do not match. (You provided {0}) 

validation.properties

required=필수입니다.
required.login.id=ID는 필수입니다.
required.login.password=비밀번호는 필수입니다.
required.login.loginType=로그인 타입을 선택하세요.
invalidIdOrPassword.login=당신이 입력한 id {0}. 로그인 아이디와 비밀번호가 일치하지 않습니다.

viewjsp/loginForm.jsp

<%@ page contentType="text/html; charset=EUC-KR" %>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html> 
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title><spring:message code="login.form.title"/></title>
</head>
<body>
<form:form commandName="login">
<form:errors />
<p>
	<label for="loginType"><spring:message code="login.form.type" /></label>
	<form:select path="loginType" items="${loginTypes}" />
</p>
<p>
	<label for="id"><spring:message code="login.form.id" /></label>
	<form:input id="id" path="id"/>
	<form:errors path="id" />
</p>
<p>
	<label for="password"><spring:message code="login.form.password" /></label>
	<form:password id="password" path="password"/>
	<form:errors path="password" />
</p>
<p>
	<input type="submit" value="<spring:message code="login.form.submit" />">
</p>
</form:form>
</body>
</html>

spring:message가 label properties에 접근하여 메세지를 읽어 온다

viewjsp/loginSuccess.jsp 

<%@ page language="java" contentType="text/html; charset=EUC-KR" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>로그인 성공</title>
</head>
<body>
로그인에 성공했습니다.
</body>
</html>