基于javaweb漫画管理系统

package com.utils; import cn.hutool.cron.CronUtil; import cn.hutool.cron.task.Task; import cn.hutool.db.Db; import cn.hutool.db.Entity; import com.annotation.RequestMapping; import javax.servlet.*; import javax.servlet.annotation.MultipartConfig; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.Part; import java.io.*; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.nio.charset.StandardCharsets; import java.sql.SQLException; import java.util.*; @WebServlet("/") public class DispatcherServlet extends HttpServlet { public final static Map<String, RequestMap> map = new HashMap<>(); public final static List<String> staticList = new ArrayList<>(); @Override public void init(ServletConfig config) throws ServletException { ServletContext servletContext = config.getServletContext(); String realPath = servletContext.getRealPath("/"); // servlet的目录 File file = new File(realPath + "\\WEB-INF\\classes\\com\\controller"); // 获取servlet目录下的所有类 String[] list = file.list(); File staticFile = new File(realPath); FileUtil.itemFile(staticFile, staticList, realPath); assert list != null; for (String string : list) { // 截取类名称 String name = string.substring(0, string.lastIndexOf(".")); try { // 通过反射获取Class对象 Class<?> c = Class.forName("com.controller." + name); // 判断该类上是否有RequestMapping注解 String value = ""; if (c.isAnnotationPresent(RequestMapping.class)) { // 获取注解，进行强制转换成RequestMapping对象 RequestMapping annotation = c.getAnnotation(RequestMapping.class); // 获取RequestMapping对象的值 value += annotation.value(); } // 获取所有的方法 // 没有就调用父类的service方法 Method[] methods = c.getDeclaredMethods(); // 循环遍历判断是否RequestMapping这个注解 for (Method method : methods) { if (method.isAnnotationPresent(RequestMapping.class)) { RequestMapping meRequestMapping = method.getAnnotation(RequestMapping.class); String requestMethod = meRequestMapping.method(); String meValue = meRequestMapping.value(); // 创建继承HttpServlet的类 Object o = c.newInstance(); // 添加Servlet map.put(value + meValue, new RequestMap(method, o, requestMethod)); } } } catch (ClassNotFoundException | IllegalArgumentException | InstantiationException | IllegalAccessException e) { e.printStackTrace(); } } selectId(ApiDataUtils.INFORMATION); selectId(ApiDataUtils.ROOT_ID); selectId(ApiDataUtils.ROOT_DETAIL_ID); CronUtil.schedule("*/1 * * * *", (Task) () -> { System.out.println("每一分钟执行一次，图片删除"); try { List<String> headPhoto = Db.use().query("select head_photo from information where head_photo is not null and head_photo != ''", String.class); String path = getServletContext().getRealPath("/page/image/head"); File staticPath = new File(path); if (staticPath.exists() && headPhoto != null){ String[] fileList = staticPath.list(); if (fileList != null){ for (String s : fileList) { if (!headPhoto.contains("/cartoon/page/image/head/" + s)){ boolean delete = new File(staticPath, s).delete(); if (delete){ System.out.println("成功删除-" + s + "-文件"); } } } } } } catch (SQLException e) { e.printStackTrace(); } }); CronUtil.setMatchSecond(true); CronUtil.start(); super.init(config); } public void selectId(int choose) { Entity entity = null; try { switch (choose) { case ApiDataUtils.INFORMATION: entity = Db.use().queryOne("select * from information order by id desc limit 1"); if (entity == null) { ApiDataUtils.INFORMATION_ID = 1; } else { ApiDataUtils.INFORMATION_ID = entity.getInt("id") + 1; } break; case ApiDataUtils.ROOT: entity = Db.use().queryOne("select * from root order by id desc limit 1"); if (entity == null) { ApiDataUtils.ROOT_ID = 1; } else { ApiDataUtils.ROOT_ID = entity.getInt("id") + 1; } break; case ApiDataUtils.ROOT_DETAIL: entity = Db.use().queryOne("select * from root_detail by id desc limit 1"); if (entity == null) { ApiDataUtils.ROOT_DETAIL_ID = 1; } else { ApiDataUtils.ROOT_DETAIL_ID = entity.getInt("id") + 1; } break; } } catch (SQLException e) { e.printStackTrace(); } } @Override protected void service(HttpServletRequest req, HttpServletResponse resp) throws IOException { req.setCharacterEncoding("utf-8"); resp.setCharacterEncoding("utf-8"); Set<String> keySet = map.keySet(); String uri = req.getRequestURI().replace(req.getContextPath(), ""); if (keySet.contains(uri)) { RequestMap requestMap = map.get(uri); if (req.getMethod().toLowerCase().equals(requestMap.getRequestMethod())) { try { resp.setContentType("application/json;charset=utf-8"); requestMap.getMethod().invoke(requestMap.getObject(), req, resp); } catch (IllegalAccessException | InvocationTargetException | IllegalArgumentException e) { e.printStackTrace(); resp.setStatus(500); resp.setContentType("text/html;charset=UTF-8"); ServletOutputStream outputStream = resp.getOutputStream(); outputStream.write("<!doctype html><html lang=\"zh\"><head><title>HTTP状态 500 - 内部服务器错误</title><style type=\"text/css\">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP状态 500 - 内部服务器错误</h1>".getBytes(StandardCharsets.UTF_8)); outputStream.write("<p><b>注意</b> 主要问题的全部在控制台里查看</p><hr class=\"line\" /><h3>Apache Tomcat/8.5.76</h3></body></html>".getBytes(StandardCharsets.UTF_8)); outputStream.close(); } } else { resp.setStatus(405); resp.setContentType("text/html;charset=UTF-8"); OutputStream writer = resp.getOutputStream();