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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：
方式一：設備檢測
設備檢測是分析HTTP请求以决定發出请求的設備的過程。
這通常是通過檢測User-Agent Header和其他请求来實現作的。
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
加入在Maven專案中的pom.xml
<dependency>
<groupId>org.springframework.mobile</groupId>
<artifactId>spring-mobile-device</artifactId>
<version>1.1.3.RELEASE</version>
</dependency>
3. 更改Controller 部分
package com.sample.web.controller;
import org.springframework.mobile.device.Device;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class HelloController {
@RequestMapping(value = { "/", "/welcome**" }, method = RequestMethod.GET)
public ModelAndView welcomePage(Device device) {
ModelAndView model = new ModelAndView();
if( device.isMobile() ){
model.addObject("message", "Hello World Mobile User!");
}else if( device.isTablet() ){
model.addObject("message", "Hello World Tablet User!");
}else if( device.isNormal() ){
model.addObject("message", "Hello World Desktop User!");
}
model.setViewName("hello");
return model;
}
}
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
程式碼：
package com.sample.config;
import java.util.List;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.mobile.device.DeviceHandlerMethodArgumentResolver;
import org.springframework.mobile.device.DeviceResolverHandlerInterceptor;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
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();
}
/**
* 設備處理程序
* @return DeviceHandlerMethodArgumentResolver
*/
@Bean
public DeviceHandlerMethodArgumentResolver deviceHandlerMethodArgumentResolver() {
return new DeviceHandlerMethodArgumentResolver();
}
/**
* 加入SPRING攔截器
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(deviceResolverHandlerInterceptor());
}
/**
* 加入參數解析器
*/
@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
argumentResolvers.add(deviceHandlerMethodArgumentResolver());
}
@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(增加CharacterEncodingFilter)
目錄 : src/main/java/com/sample/config/core
檔名 : SpringMvcInitializer.java(以下兩張圖片web.xml和Annotation寫法比對)
程式碼：
package com.sample.config.core;
import javax.servlet.Filter;
import org.springframework.web.filter.CharacterEncodingFilter;
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 };
}
}
6.執行成功畫面：
URL = http://127.0.0.1:8080/SampleSpringMVC-2/
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