java8中map和list的遍历

1、把一个list里面的数据转换成另外一个list

        Map matchingBeans =
                BeanFactoryUtils.beansOfTypeIncludingAncestors(contextRefreshedEvent.getApplicationContext(), HandlerMapping.class, true, false);
        ArrayList list = new ArrayList<>(matchingBeans.values());
        AnnotationAwareOrderComparator.sort(list);
        ArrayList ss = new ArrayList();
        list.forEach(k -> ss.add(k.getClass().getName()));
        log.info("HandlerMappingList = {}", JSON.toJSONString(ss));

输出的结果为：

[
	"org.springframework.web.servlet.handler.SimpleUrlHandlerMapping",
	"org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping",
	"org.springframework.web.socket.server.support.WebSocketHandlerMapping",
	"org.springframework.web.socket.server.support.WebSocketHandlerMapping",
	"org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping",
	"org.springframework.web.servlet.handler.SimpleUrlHandlerMapping",
	"org.springframework.boot.autoconfigure.web.servlet.WelcomePageHandlerMapping"
]

2、一个map转换为另外一个map

Map matchingBeans =
                BeanFactoryUtils.beansOfTypeIncludingAncestors(contextRefreshedEvent.getApplicationContext(), HandlerMapping.class, true, false);
        Map result = new HashMap<>();
        matchingBeans.forEach((k, v) -> {
            result.put(k, v.getClass().getName());
        });
        log.info("HandlerMapping = {}", JSON.toJSONString(result));
 

输出的结果为：

{
	"stompWebSocketHandlerMapping": "org.springframework.web.socket.server.support.WebSocketHandlerMapping",
	"welcomePageHandlerMapping": "org.springframework.boot.autoconfigure.web.servlet.WelcomePageHandlerMapping",
	"faviconHandlerMapping": "org.springframework.web.servlet.handler.SimpleUrlHandlerMapping",
	"beanNameHandlerMapping": "org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping",
	"resourceHandlerMapping": "org.springframework.web.servlet.handler.SimpleUrlHandlerMapping",
	"webSocketHandlerMapping": "org.springframework.web.socket.server.support.WebSocketHandlerMapping",
	"requestMappingHandlerMapping": "org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"
}