23. 스프링에서 지원하는 여러 가지 기능

<bean id="multipartResolver"
    class="org.springframework.web.multipart
    .commons.CommonsMultipartResolver">
    <property name="maxUploadSize"
        value="52428800" />
    <property name="maxInMemorySize"
        value="1048576" />
    <property name="defaultEncoding"
        value="UTF-8" />
</bean>

<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.3.3</version>
</dependency>
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.6</version>
</dependency>

@RequestMapping("/upload")
public String upload(
    MultipartHttpServletRequest request)
    throws Exception {

    // 업로드된 파일 목록 가져오기
    Iterator<String> fileNames =
        request.getFileNames();

    while (fileNames.hasNext()) {
        String fileName = fileNames.next();
        MultipartFile mFile =
            request.getFile(fileName);

        String originalName =
            mFile.getOriginalFilename();

        // 파일 저장
        mFile.transferTo(
            new File(uploadPath + "/"
                + originalName));
    }
    return "uploadResult";
}

<dependency>
    <groupId>org.imgscalr</groupId>
    <artifactId>imgscalr-lib</artifactId>
    <version>4.2</version>
</dependency>

<bean id="mailSender"
    class="org.springframework.mail
    .javamail.JavaMailSenderImpl">
    <property name="host"
        value="smtp.gmail.com" />
    <property name="port"
        value="465" />
    <property name="username"
        value="your@gmail.com" />
    <property name="password"
        value="앱 비밀번호" />
    <property name="javaMailProperties">
        <props>
            <prop key=
                "mail.transport.protocol">
                smtp</prop>
            <prop key=
                "mail.smtp.auth">
                true</prop>
            <prop key=
                "mail.smtp.starttls.enable">
                true</prop>
            <prop key=
                "mail.smtp.socketFactory.class">
                javax.net.ssl.SSLSocketFactory
            </prop>
        </props>
    </property>
</bean>

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.4.7</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</artifactId>
    <version>4.3.30.RELEASE</version>
</dependency>

@Service
public class MailService {

    @Autowired
    private JavaMailSender mailSender;

    public void sendMail(
        String to,
        String subject,
        String body) {

        SimpleMailMessage message =
            new SimpleMailMessage();
        message.setTo(to);
        message.setSubject(subject);
        message.setText(body);

        mailSender.send(message);
    }
}

<context-param>
    <param-name>
        contextConfigLocation
    </param-name>
    <param-value>
        /WEB-INF/spring/*.xml
    </param-value>
</context-param>

public class LoginInterceptor
    extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(
        HttpServletRequest request,
        HttpServletResponse response,
        Object handler)
        throws Exception {

        HttpSession session =
            request.getSession();

        if (session.getAttribute("user")
            == null) {
            response.sendRedirect("/login");
            return false;  // 요청 중단
        }
        return true;  // 다음 단계로 진행
    }
}

<mvc:interceptors>
    <mvc:interceptor>
        <mvc:mapping path="/member/**" />
        <mvc:exclude-mapping
            path="/member/login" />
        <bean class=
            "com.example.LoginInterceptor" />
    </mvc:interceptor>
</mvc:interceptors>

<!-- 세션에 locale 정보 저장 -->
<bean id="localeResolver"
    class="org.springframework.web.servlet
    .i18n.SessionLocaleResolver" />

<!-- 메시지 프로퍼티 파일 로딩 -->
<bean id="messageSource"
    class="org.springframework.context
    .support
    .ReloadableResourceBundleMessageSource">
    <property name="basename">
        <list>
            <value>
                classpath:locale/messages
            </value>
        </list>
    </property>
    <property name="defaultEncoding"
        value="UTF-8" />
    <property name="cacheSeconds"
        value="60" />
</bean>

greeting=안녕하세요
login.title=로그인
login.button=로그인하기

greeting=Hello
login.title=Login
login.button=Sign In

<mvc:interceptors>
    <bean class=
        "org.springframework.web.servlet
        .i18n.LocaleChangeInterceptor">
        <property name="paramName"
            value="locale" />
    </bean>
</mvc:interceptors>