SpringBoot搭建以一些配置與註解

 註解

@RequestMapping("/user")   用於127.0.0.1:8080/user

@RequestBody       返回數據json

@Controller  用於標註控制端 

@PathVariable("userId")String userId   用於127.0.0.1:8080/123    123代表userId

 

 

 

@Options(useGeneratedKeys = true, keyProperty = "userId")

@Select("select * from sys_user")
@Results(id="User",value = {
        @Result(id=true,property = "userId", column = "user_id"),
        @Result(property = "userName", column = "user_name"),
})

StringBoot web資源解析

@ConfigurationProperties(
    prefix = "spring.resources",
    ignoreUnknownFields = false
)
public class ResourceProperties {
    

 可以設置spring.resources    靜態資源路徑  以及緩存

public void addResourceHandlers(ResourceHandlerRegistry registry) {
            if (!this.resourceProperties.isAddMappings()) {
                logger.debug("Default resource handling disabled");
            } else {
                Duration cachePeriod = this.resourceProperties.getCache().getPeriod();
                CacheControl cacheControl = this.resourceProperties.getCache().getCachecontrol().toHttpCacheControl();
                if (!registry.hasMappingForPattern("/webjars/**")) {
                    this.customizeResourceHandlerRegistration(registry.addResourceHandler(new String[]{"/webjars/**"}).addResourceLocations(new String[]{"classpath:/META-INF/resources/webjars/"}).setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));
                }

                String staticPathPattern = this.mvcProperties.getStaticPathPattern();
                if (!registry.hasMappingForPattern(staticPathPattern)) {
                    this.customizeResourceHandlerRegistration(registry.addResourceHandler(new String[]{staticPathPattern}).addResourceLocations(WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations())).setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));
                }

            }
        }

 addResourceHandlers 是 WebMvcAutoConfiguration.class 中的一個函數 主要用於配置webjars

webjars配置是到classpath:/META-INF/resources/webjars/找資源路徑   比如 jsp  html  css 等

以jar包的方式引入靜態資源  

可以參考https://www.webjars.org/  以maven的方式把js  jq等等配置到pom.xml項目裏

<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>jquery</artifactId>
    <version>3.5.1</version>
</dependency>

 

配置好後，在webjars下直接可以訪問到 

如果請求沒人處理會到

private static final String[] CLASSPATH_RESOURCE_LOCATIONS = new String[]{"classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/"};

靜態資源

"classpath:/META-INF/resources/",

"classpath:/resources/",

"classpath:/static/",

"classpath:/public/"

"/**" 

路徑下找

 @Bean
        public WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext, FormattingConversionService mvcConversionService, ResourceUrlProvider mvcResourceUrlProvider) {
            WelcomePageHandlerMapping welcomePageHandlerMapping = new WelcomePageHandlerMapping(new TemplateAvailabilityProviders(applicationContext), applicationContext, this.getWelcomePage(), this.mvcProperties.getStaticPathPattern());
            welcomePageHandlerMapping.setInterceptors(this.getInterceptors(mvcConversionService, mvcResourceUrlProvider));
            welcomePageHandlerMapping.setCorsConfigurations(this.getCorsConfigurations());
            return welcomePageHandlerMapping;
        }

        private Optional<Resource> getWelcomePage() {
            String[] locations = WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations());
            return Arrays.stream(locations).map(this::getIndexHtml).filter(this::isReadable).findFirst();
        }

        private Resource getIndexHtml(String location) {
            return this.resourceLoader.getResource(location + "index.html");
        }

 配置歡迎頁  登錄頁面或者主頁

"classpath:/META-INF/resources/",

"classpath:/resources/",

"classpath:/static/",

"classpath:/public/"

"/**" 

所有的index.html

 FAVICON(new String[]{"/**/favicon.ico"});
//配置圖標  靜態資源路徑下favicon.ico

//配置圖標  靜態資源路徑下favicon.ico

SpringBoot自動配置原理 

修改以及擴展

 xxxAutoConfiguration: 幫我們給容器中自動配置組件

 xxxProperties:配置類來封裝配置文件的內容

@Value("${xxx.xxx}")
//註解value的使用
//類必須交給spring來管理 類上加上@Component或其他註解
//要想在靜態方法中調用

 private static String name;

 @Value("${xxx.name}")
 public void setAccessKeyId(String name) {
     this.name= name;
 }
 //this 很重要
 
 //下面靜態方法就可以引用了
 public static String getName() {
     return name;
 }

//使用redis儲存session
spring.session.store-type=redis

//不使用redis儲存session
spring.session.store-type=none

//禁用security
security.basic.enabled = false