feat(Java_SpringExample): 创建工程(代码有问题，先提交)

2020-05-22 18:02:41 +08:00
commit 456f0be8b5
17 changed files with 1933 additions and 0 deletions
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+package config;
+
+import filter.FilterDelegator;
+import filter.WelcomeHandlingFilter;
+import org.springframework.util.StringUtils;
+import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
+
+import javax.servlet.*;
+import java.util.ArrayList;
+import java.util.EnumSet;
+import java.util.EventListener;
+import java.util.List;
+
+/**
+ * Created by com on 2017/7/25.
+ * <p>
+ * 相当于web.xml的加载配置
+ */
+
+/***
+ *    FilterRegistration.Dynamic welcomePagFilter = container.addFilter("WelcomePagFilter", new WelcomePagFilter());
+ *    welcomePagFilter.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST), true, "/*");
+ *    上述是配置过滤器作用的请求.
+ *    这里已经包装起来了
+ */
+
+public class WebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {
+
+
+    @Override
+    public void onStartup(ServletContext servletContext) throws ServletException {
+        super.onStartup(servletContext);
+        /**配置和监听器*/
+        registerServletFilters(servletContext);
+        registerListeners(servletContext);
+        // QuartzListener quartzListener = new QuartzListener();
+        // servletContext.addListener(quartzListener.getClass());
+    }
+
+
+    /**
+     * 配置ContextComponentLoader
+     */
+    @Override
+    protected Class<?>[] getRootConfigClasses() {
+        // return new Class<?>[]{ContextComponentLoder.class};
+        return new Class<?>[]{};
+    }
+
+
+    /**
+     * 配置DispatcherServlet
+     */
+    @Override
+    protected Class<?>[] getServletConfigClasses() {
+        return new Class<?>[]{MvcComponentLoader.class};
+    }
+
+    /**将DispatcherServlet映射到指定路径
+     配置ServletMappings*/
+    @Override
+    protected String[] getServletMappings() {
+        return new String[]{"/"};
+    }
+
+
+    /**
+     * 在ServletContext中添加过滤器，并把过滤器应用于DispatcherServlet。
+     *
+     * @param servletContext Servlet上下文
+     */
+    protected void registerServletFilters(ServletContext servletContext) {
+        List<FilterDelegator> list = new ArrayList<>();
+        /**添加基本的过滤器配置,包括欢迎页和编码格式*/
+        configServletFilters(list);
+        for (FilterDelegator filterDelegator : list) {
+            if (StringUtils.hasText(filterDelegator.getFilterName())) {
+                registerServletFilter(servletContext, filterDelegator.getFilter(), filterDelegator.getFilterName());
+            } else {
+                registerServletFilter(servletContext, filterDelegator.getFilter());
+            }
+        }
+
+    }
+
+    /**
+     * 配置DispatcherServlet的过滤器。
+     * 添加基本的过滤器配置
+     *
+     * @param servletFilters DispatcherServlet的过滤器
+     */
+    protected void configServletFilters(List<FilterDelegator> servletFilters) {
+        /**
+         * 配置编码格式和欢迎页面
+         */
+        // servletFilters.add(new filter(new CharacterEncodingFilter("UTF-8")));
+        servletFilters.add(new FilterDelegator(new WelcomeHandlingFilter()));
+    }
+
+    /**
+     * 在ServletContext中添加过滤器，并把过滤器应用于DispatcherServlet。
+     *
+     * @param servletContext Servlet上下文
+     * @param filter 过滤器
+     * @param filterName 过滤器名称
+     */
+    protected final void registerServletFilter(ServletContext servletContext, Filter filter, String filterName) {
+        FilterRegistration.Dynamic registration = servletContext.addFilter(filterName, filter);
+        if (registration == null) {
+            throw new IllegalStateException("Duplicate Filter registration for '" + filterName + "'. Check to ensure the Filter is only "
+                + "configured once.");
+        }
+        registration.setAsyncSupported(isAsyncSupported());
+        registration.addMappingForServletNames(getDispatcherTypes(), false, getServletName());
+    }
+
+    /**
+     * 获取过滤器的分发器类型。<br>
+     * 1、支持异步操作时，默认为：DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.INCLUDE、DispatcherType.ASYNC；<br>
+     * 2、不支持异步操作时，默认为：DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.INCLUDE。
+     * <p>
+     *
+     * 参考：<br>
+     * AbstractDispatcherServletInitializer.getDispatcherTypes()
+     *
+     * @return DispatcherType集合
+     */
+    protected final EnumSet<DispatcherType> getDispatcherTypes() {
+        EnumSet<DispatcherType> dispatcherTypes = EnumSet.of(DispatcherType.REQUEST, DispatcherType.FORWARD, DispatcherType.INCLUDE);
+        if (isAsyncSupported()) {
+            dispatcherTypes.add(DispatcherType.ASYNC);
+        }
+        configDispatcherTypes(dispatcherTypes);
+        return dispatcherTypes;
+    }
+
+    /**
+     * 配置过滤器的分发器类型。
+     *
+     * @param dispatcherTypes 过滤器的分发器类型
+     */
+    protected void configDispatcherTypes(EnumSet<DispatcherType> dispatcherTypes) {
+
+    }
+
+    /**
+     * 在ServletContext中添加监听器。
+     *
+     * @param servletContext Servlet上下文
+     */
+    protected final void registerListeners(ServletContext servletContext) {
+        List<Class<? extends EventListener>> listenerClasses = new ArrayList();
+
+        // ExcelTempFileListener excelTempFileListener = new ExcelTempFileListener();
+        // TestHttpSessionListener testHttpSessionListener = new TestHttpSessionListener();
+
+        configListenerClasses(listenerClasses);
+        for (Class<? extends EventListener> listenerClass : listenerClasses) {
+            servletContext.addListener(listenerClass);
+        }
+        /**添加监听器???? --- 2017.08.23----*/
+        // servletContext.addListener(excelTempFileListener);
+        // servletContext.addListener(testHttpSessionListener);
+    }
+
+    /**
+     * 配置监听器。
+     *
+     * @param listenerClasses 监听器类
+     */
+    protected void configListenerClasses(List<Class<? extends EventListener>> listenerClasses) {
+
+
+    }
+
+
+}