Java程式教學甘仔店: 建立一個SpringMVC Annotation Project 2-3 (判斷Mobile Tablet Desktop)

2014年12月11日星期四

建立一個SpringMVC Annotation Project 2-3 (判斷Mobile Tablet Desktop) - Hello World

本文使用 Spring Web model-view-controller (MVC) framework
建立一個簡單的一個Hello World 程式且可判斷Mobile Tablet Desktop進入這頁面
有三種方式：
　方式三：站點切換
指的是可以根據方式一以及方式二將使用者切換到適合網站的能力
此方式有四種方法使用(mDot, dotMobi, standard以及urlPath)
本文使用urlPath呈現效果

1、請參考建立一個SpringMVC Annotation Project - Hello World此篇文章，以下是以此作為延伸

2、加入 spring-mobile-device.jar
3. Controller 部分
請參考建立一個SpringMVC Annotation Project 2-1 (判斷Mobile Tablet Desktop) - Hello World

4. 更改AppConfig 部分(Spring 設定) - 需繼承 WebMvcConfigurerAdapter
目錄 : src/main/java/com/sample/config
檔名 : AppConfig.java

package com.sample.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.mobile.device.DeviceResolverHandlerInterceptor;
import org.springframework.mobile.device.switcher.SiteSwitcherHandlerInterceptor;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;


@EnableWebMvc
@Configuration
@ComponentScan({ "com.sample.web.*" })
public class AppConfig extends WebMvcConfigurerAdapter{
 
 /**
  * 設備攔截器
  * @return DeviceResolverHandlerInterceptor
  */
 @Bean
 public DeviceResolverHandlerInterceptor deviceResolverHandlerInterceptor() {
     return new DeviceResolverHandlerInterceptor();
 }
 
 /**
  * 網址切換攔截器
  * 第一個参数用於指定mobile的路徑，第二个参数用於指定應用的root path
  * @return SiteSwitcherHandlerInterceptor
  */
 @Bean
 public SiteSwitcherHandlerInterceptor siteSwitcherHandlerInterceptor() {
     return SiteSwitcherHandlerInterceptor.urlPath("/m", "/SampleSpringMVC-2-3");
 }
 
 /**
  * 加入SPRING攔截器
  */
 @Override
 public void addInterceptors(InterceptorRegistry registry) {
     registry.addInterceptor(deviceResolverHandlerInterceptor());
     registry.addInterceptor(siteSwitcherHandlerInterceptor());
 }

 /**
  * 頁面導向
  * @return InternalResourceViewResolver
  */
 @Bean
 public InternalResourceViewResolver viewResolver() {
  InternalResourceViewResolver viewResolver = new InternalResourceViewResolver();
  viewResolver.setViewClass(JstlView.class);
  viewResolver.setPrefix("/WEB-INF/pages/");
  viewResolver.setSuffix(".jsp");
  return viewResolver;
 }
 
}

5.建立 SpringMvcInitializer.java(需要增加urlPattern)
目錄 : src/main/java/com/sample/config/code
檔名 : SpringMvcInitializer.java

package com.sample.config.core;

import javax.servlet.Filter;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration.Dynamic;

import org.springframework.web.context.ContextLoaderListener;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

import com.sample.config.AppConfig;

public class SpringMvcInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

 @Override
 protected Class[] getRootConfigClasses() {
  return new Class[] { AppConfig.class };
 }

 @Override
 protected Class[] getServletConfigClasses() {
  return null;
 }

 @Override
 protected String[] getServletMappings() {
  return new String[] { "/" };
 }
 
 @Override
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter utf8Filter = new CharacterEncodingFilter();
        utf8Filter.setEncoding("UTF-8");
        utf8Filter.setForceEncoding(true);
        return new Filter[] { utf8Filter };
    }
 
 @Override
 public void onStartup(ServletContext servletContext) throws ServletException {
            AnnotationConfigWebApplicationContext rootContext 
      = new AnnotationConfigWebApplicationContext();
     rootContext.register(AppConfig.class);
     rootContext.setServletContext(servletContext); 
     rootContext.scan("com.sample.config");
     
     Dynamic dynamic = servletContext.addServlet("mvc-dispatcher", 
       new DispatcherServlet(rootContext));  
     dynamic.addMapping("/","/m/*");  
            dynamic.setLoadOnStartup(1);

     servletContext.addListener(new ContextLoaderListener(rootContext));
  }
 
}