springboot首頁定制

Posted 2021-07-11 Fire king

springboot首页定制

• 1.springboot默认首页
• • 1.源码
  • 2.访问：
• 2.使用controller层+theymeleaf访问：
• • 1.源码：
  • 2.加入启动器：
  • 3.编写控制层代码：
  • 4.访问

1.springboot默认首页

1.源码

 @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));
            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");
        }

分析：

 @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));
            return welcomePageHandlerMapping;
        }

方法意为欢迎页控制映射，也就说解决访问路径的问题
WelcomePageHandlerMapping welcomePageHandlerMapping = new WelcomePageHandlerMapping(new TemplateAvailabilityProviders(applicationContext), applicationContext, this.getWelcomePage(), this.mvcProperties.getStaticPathPattern());中this.mvcProperties.getStaticPathPattern()说明获取访问路径，进入this.mvcProperties.getStaticPathPattern()方法，this.staticPathPattern = "/**"，
说明访问路径在项目根目录下，即在http://localhost:port/，private Resource getIndexHtml(String location) { return this.resourceLoader.getResource(location + "index.html");至于location }，至于location是什么，从private Optional<Resource> getWelcomePage() { String[] locations = WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations()); return Arrays.stream(locations).map(this::getIndexHtml).filter(this::isReadable).findFirst(); }中getStaticLocations()方法可以得到

 private static final String[] CLASSPATH_RESOURCE_LOCATIONS = new String[]{"classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/"};
    private String[] staticLocations;
    private boolean addMappings;
    private final ResourceProperties.Chain chain;
    private final ResourceProperties.Cache cache;

    public ResourceProperties() {
        this.staticLocations = CLASSPATH_RESOURCE_LOCATIONS;
        this.addMappings = true;
        this.chain = new ResourceProperties.Chain();
        this.cache = new ResourceProperties.Cache();
    }

所以通过http://localhost:port/映射到的首页访问路径为：

"classpath:/META-INF/resources/index.html", 
"classpath:/resources/index.html",
 "classpath:/static/index.html", 
 "classpath:/public/index.html"

2.访问：

使用http://localhost:port/访问即可：

由于源码中已经定义了首页名字，自定义就不能用http://localhost:port/访问：

2.使用controller层+theymeleaf访问：

条件：theymeleaf在自动配置中不符合@Condition，也就是说没有响应的依赖使它生效，因此可以通过导包或者加入theymeleaf启动器解决，这里只说一种（加入theymeleaf启动器）：

1.源码：

public class ThymeleafProperties {
    private static final Charset DEFAULT_ENCODING;
    public static final String DEFAULT_PREFIX = "classpath:/templates/";
    public static final String DEFAULT_SUFFIX = ".html";
    private boolean checkTemplate = true;
    private boolean checkTemplateLocation = true;
    private String prefix = "classpath:/templates/";
    private String suffix = ".html";
    private String mode = "HTML";

没有说明指定视图的名字，可以自定义。

2.加入启动器：

特别注意看有没有theymeleaf相关的包导入。

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

3.编写控制层代码：

package edu.xlh.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class IndexTestController {

    @RequestMapping("/test")
    public String getIndex(){
        return "yyds";
    }
}

4.访问