SpringBoot web · TUNA-daily

## 1. Spring Boot的web開發 Web開發的自動配置類：org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration ### 1.1 自動配置的ViewResolver ![](https://box.kancloud.cn/874929102fe04ca311054a23492e4b1c_977x422.png) 視圖的配置mvcProperties對象中： org.springframework.boot.autoconfigure.web.WebMvcProperties.View ![](https://box.kancloud.cn/59cca2f900beab7cd2c7e0b477c70646_614x294.png) ### 1.2 自動配置靜態資源 1. 進入規則為 / 如果進入SpringMVC的規則為/時，Spring Boot的默認靜態資源的路徑為： spring.resources.static-locations=classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/ ![](https://box.kancloud.cn/31369ef67442389c223961a6f917d058_800x206.png) 測試： ![](https://box.kancloud.cn/85f93f846de968e7f71d3a284f16f870_250x88.png) ![](https://box.kancloud.cn/2c6894eab9145fb29e658020b9b17afb_1058x703.png) ### 1.3 進入規則為*.xxx 或者不指定靜態文件路徑時將靜態資源放置到webapp下的static目錄中即可通過地址訪問： ![](https://box.kancloud.cn/076d071c4bf08d171e90897ede5106fa_258x186.png) 測試： ### 1.4 自定義消息轉化器自定義消息轉化器，只需要在@Configuration的類中添加消息轉化器的@bean加入到Spring容器，就會被Spring Boot自動加入到容器中。 ~~~ ~~~ @Bean public StringHttpMessageConverter stringHttpMessageConverter(){ StringHttpMessageConverter converter = new StringHttpMessageConverter(Charset.forName("UTF-8")); return converter; ~~~ ~~~ 默認配置： ### 1.5 自定義SpringMVC的配置有些時候我們需要自已配置SpringMVC而不是采用默認，比如說增加一個攔截器，這個時候就得通過繼承WebMvcConfigurerAdapter然后重寫父類中的方法進行擴展。 ~~~ import java.nio.charset.Charset; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.context.annotation.Configuration; import org.springframework.http.converter.HttpMessageConverter; import org.springframework.http.converter.StringHttpMessageConverter; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; @Configuration //申明這是一個配置 public class MySrpingMVCConfig extends WebMvcConfigurerAdapter{ // 自定義攔截器 @Override public void addInterceptors(InterceptorRegistry registry) { HandlerInterceptor handlerInterceptor = new HandlerInterceptor() { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println("自定義攔截器............"); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }; registry.addInterceptor(handlerInterceptor).addPathPatterns("/**"); } // 自定義消息轉化器的第二種方法 @Override public void configureMessageConverters(List<HttpMessageConverter<?>> converters) { StringHttpMessageConverter converter = new StringHttpMessageConverter(Charset.forName("UTF-8")); converters.add(converter); } } ~~~ ## 2. 自定義 ![](https://box.kancloud.cn/acea9509726bd556cd807b071d7239e9_340x547.png) 1. HelloApplication ~~~ @Controller @SpringBootApplication(exclude = { RedisAutoConfiguration.class }) //@ComponentScan(basePackages={"cn.itcast.springboot.javaconfig"}) 默認掃描與應用同級的目錄和這個目錄的子目錄，此時MySpringMVCConfig類配置，就不起作用了 @Configuration public class HelloApplication { @RequestMapping("hello") @ResponseBody public String hello() { return "hello world！傳智播客！"; } //自定義消息轉換器 @Bean public StringHttpMessageConverter stringHttpMessageConverter() { StringHttpMessageConverter converter = new StringHttpMessageConverter(Charset.forName("ISO-8859-1")); return converter; } public static void main(String[] args) { // SpringApplication.run(HelloApplication.class, args); SpringApplication application = new SpringApplication(HelloApplication.class); application.setBannerMode(Mode.OFF); application.run(args); } } ~~~ 2. 自定義類 ~~~ @Configuration //申明這是一個配置，和HelloApplication在同一個目錄下，所有配置會被掃描 public class MySrpingMVCConfig extends WebMvcConfigurerAdapter{ // 自定義攔截器 @Override public void addInterceptors(InterceptorRegistry registry) { HandlerInterceptor handlerInterceptor = new HandlerInterceptor() { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println("自定義攔截器............"); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }; registry.addInterceptor(handlerInterceptor).addPathPatterns("/**"); } // 自定義消息轉化器的第二種方法 @Override public void configureMessageConverters(List<HttpMessageConverter<?>> converters) { StringHttpMessageConverter converter = new StringHttpMessageConverter(Charset.forName("UTF-8")); converters.add(converter); } } ~~~