diff --git a/libs/javax.servlet-api-4.0.1.jar b/libs/javax.servlet-api-4.0.1.jar new file mode 100644 index 0000000..844ec7f Binary files /dev/null and b/libs/javax.servlet-api-4.0.1.jar differ diff --git a/src/com/hellogithub/service/projectService.java b/src/com/hellogithub/service/projectService.java index e0d6e8c..9a2dce4 100644 --- a/src/com/hellogithub/service/projectService.java +++ b/src/com/hellogithub/service/projectService.java @@ -142,6 +142,7 @@ public class projectService { } public projectEntity selectProById(String id ){ + projectEntity projectEntity = projectDao.selectProById(id); categoryEntity categoryEntity = categoryDao.retNum(projectEntity.getCategoryId()); projectEntity.setCategoryName(categoryEntity.getCategoryName()); diff --git a/src/com/hellogithub/servlet/DownLoadServlet.java b/src/com/hellogithub/servlet/DownLoadServlet.java new file mode 100644 index 0000000..71a6252 --- /dev/null +++ b/src/com/hellogithub/servlet/DownLoadServlet.java @@ -0,0 +1,127 @@ +package com.hellogithub.servlet; + +import com.alibaba.fastjson.JSONObject; + +import javax.servlet.ServletException; +import javax.servlet.annotation.WebServlet; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import java.io.*; +import java.net.URLEncoder; +import java.util.HashMap; +import java.util.UUID; + +@WebServlet("/DownLoad") +public class DownLoadServlet extends HttpServlet { + + + public void doGet(HttpServletRequest request, HttpServletResponse response) + throws ServletException, IOException { + response.setCharacterEncoding("UTF-8"); + response.setContentType("text/html; charset=utf-8"); + + String curOrigin = request.getHeader("Origin"); + response.setHeader("Access-Control-Allow-Origin", curOrigin == null ? "true" : curOrigin); + response.setHeader("Access-Control-Allow-Credentials", "true"); + response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD"); + response.setHeader("Access-Control-Max-Age", "3600"); + response.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With"); + response.setContentType("application/json;charset=UTF-8"); + + + PrintWriter writer = response.getWriter(); + + //得到要下载的文件名 + String fileName = request.getParameter("filename"); + System.out.print(fileName); + + //本地需要进行转码，linux服务器使用就会出现下载乱码 + //fileName = new String(fileName.getBytes("iso8859-1"),"UTF-8"); + +// System.out.print("转码后"+fileName); + //上传的文件都是保存在/WEB-INF/upload目录下的子目录当中 + String fileSaveRootPath=this.getServletContext().getRealPath(File.separator+"WEB-INF"+File.separator+"upload"); + //通过文件名找出文件的所在目录 + //String path = findFileSavePathByFileName(fileName,fileSaveRootPath); +// String path = "/WEB-INF/upload"; + //得到要下载的文件 + File file = new File(fileSaveRootPath + File.separator + fileName); + //File file = new File(fileName); + System.out.print(file); + System.out.print("\n"); + // 浏览器请求响应转码防止乱码 + response.setCharacterEncoding("UTF-8"); + request.setCharacterEncoding("UTF-8"); + //如果文件不存在 + if(!file.exists()){ + setResultError("文件资源已被删除",writer); + return; + } + //处理文件名 + String realname = fileName.substring(fileName.indexOf("_")+1); + //设置响应头，控制浏览器下载该文件 + response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode(realname, "UTF-8")); + //读取要下载的文件，保存到文件输入流 + FileInputStream in = new FileInputStream(fileSaveRootPath +File.separator+ fileName); + //创建输出流 + OutputStream out = response.getOutputStream(); + //创建缓冲区 + byte buffer[] = new byte[1024]; + int len = 0; + //循环将输入流中的内容读取到缓冲区当中 + while((len=in.read(buffer))>0){ + //输出缓冲区的内容到浏览器，实现文件下载 + out.write(buffer, 0, len); + } + //关闭文件输入流 + in.close(); + //关闭输出流 + out.close(); +// setResultOK("下载成功",writer); + } + + /** + * @Method: findFileSavePathByFileName + * @Description: 通过文件名和存储上传文件根目录找出要下载的文件的所在路径 + * @Anthor: + * @param filename 要下载的文件名 + * @param saveRootPath 上传文件保存的根目录，也就是/WEB-INF/upload目录 + * @return 要下载的文件的存储目录 + */ + public String findFileSavePathByFileName(String filename,String saveRootPath){ +// int hashcode = filename.hashCode(); +// int dir1 = hashcode&0xf; //0--15 +// int dir2 = (hashcode&0xf0)>>4; //0-15 + //String dir = saveRootPath + "\\" + dir1 + "\\" + dir2; //upload\2\3 upload\3\5 + String dir = saveRootPath; + File file = new File(dir); + if(!file.exists()){ + //创建目录 + file.mkdirs(); + } + return dir; + } + + public void doPost(HttpServletRequest request, HttpServletResponse response) + throws ServletException, IOException { + doGet(request, response); + } + + public void setResult(Integer code, String msg, PrintWriter writer) { + HashMap result = new HashMap<>(); + result.put("code", code); + result.put("msg", msg); + String jsonString = JSONObject.toJSONString(result); + writer.println(jsonString); + writer.close(); + } + + public void setResultError(String msg, PrintWriter writer) { + setResult(500, msg, writer); + } + + public void setResultOK(String msg, PrintWriter writer) { + setResult(200, msg, writer); + } +} \ No newline at end of file diff --git a/src/com/hellogithub/servlet/UploadHandleServlet.java b/src/com/hellogithub/servlet/UploadHandleServlet.java new file mode 100644 index 0000000..2675fe1 --- /dev/null +++ b/src/com/hellogithub/servlet/UploadHandleServlet.java @@ -0,0 +1,235 @@ +package com.hellogithub.servlet; + + +import javax.servlet.annotation.WebServlet; + +import com.alibaba.fastjson.JSONObject; +import org.apache.commons.fileupload.FileItem; +import org.apache.commons.fileupload.FileUploadBase; +import org.apache.commons.fileupload.ProgressListener; +import org.apache.commons.fileupload.disk.DiskFileItemFactory; +import org.apache.commons.fileupload.servlet.ServletFileUpload; + +import javax.servlet.ServletException; +import javax.servlet.http.HttpServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; +import java.io.*; +import java.util.HashMap; +import java.util.List; +import java.util.UUID; + +@WebServlet("/UploadHandle") +public class UploadHandleServlet extends HttpServlet { + public void doGet(HttpServletRequest request, HttpServletResponse response) + throws ServletException, IOException { + response.setCharacterEncoding("UTF-8"); + response.setContentType("text/html; charset=utf-8"); + // 设置响应头允许ajax跨域访问 + String curOrigin = request.getHeader("Origin"); + response.setHeader("Access-Control-Allow-Origin", curOrigin == null ? "true" : curOrigin); + response.setHeader("Access-Control-Allow-Credentials", "true"); + response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, HEAD"); + response.setHeader("Access-Control-Max-Age", "3600"); + response.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With"); + response.setContentType("application/json;charset=UTF-8"); + PrintWriter writer = response.getWriter(); + + + //得到上传文件的保存目录，将上传的文件存放于WEB-INF目录下，不允许外界直接访问，保证上传文件的安全 + String savePath = this.getServletContext().getRealPath(File.separator+"WEB-INF"+File.separator+"upload"); + //上传时生成的临时文件保存目录 + String tempPath = this.getServletContext().getRealPath(File.separator+"WEB-INF"+File.separator+"tmp"); + File tmpFile = new File(tempPath); + if (!tmpFile.exists()) { + //创建临时目录 + tmpFile.mkdir(); + } + //消息提示 + String message = ""; + String saveFilename=""; + try{ + //使用Apache文件上传组件处理文件上传步骤： + //1、创建一个DiskFileItemFactory工厂 + DiskFileItemFactory factory = new DiskFileItemFactory(); + + //设置工厂的缓冲区的大小，当上传的文件大小超过缓冲区的大小时，就会生成一个临时文件存放到指定的临时目录当中。 + + factory.setSizeThreshold(1024*100);//设置缓冲区的大小为100KB，如果不指定，那么缓冲区的大小默认是10KB + + //设置上传时生成的临时文件的保存目录 + factory.setRepository(tmpFile); + + + //2、创建一个文件上传解析器 + ServletFileUpload upload = new ServletFileUpload(factory); + + //监听文件上传进度 + upload.setProgressListener(new ProgressListener(){ + public void update(long pBytesRead, long pContentLength, int arg2) { + System.out.println("文件大小为：" + pContentLength + ",当前已处理：" + pBytesRead); + /** + * 文件大小为：14608,当前已处理：4096 + 文件大小为：14608,当前已处理：7367 + 文件大小为：14608,当前已处理：11419 + 文件大小为：14608,当前已处理：14608 + */ + } + }); + + //解决上传文件名的中文乱码 + upload.setHeaderEncoding("UTF-8"); + + //3、判断提交上来的数据是否是上传表单的数据 + if(!ServletFileUpload.isMultipartContent(request)){ + //按照传统方式获取数据 + return; + } + + + + //设置上传单个文件的大小的最大值，目前是设置为1024*1024字节，也就是1MB + upload.setFileSizeMax(1024*1024*1024); + + //设置上传文件总量的最大值，最大值=同时上传的多个文件的大小的最大值的和，目前设置为10MB + upload.setSizeMax(1024*1024*1024*10); + + //4、使用ServletFileUpload解析器解析上传数据，解析结果返回的是一个List集合，每一个FileItem对应一个Form表单的输入项 + + + List list = upload.parseRequest(request); + + for(FileItem item : list){ + + + //如果fileitem中封装的是普通输入项的数据 + if(item.isFormField()){ + String name = item.getFieldName(); + //解决普通输入项的数据的中文乱码问题 + String value = item.getString("UTF-8"); + //String value = new String(name.getBytes("iso8859-1"),"UTF-8"); + System.out.println(">>>>>>>>>>"+name + "=" + value); + + + }else{ + + //如果fileitem中封装的是上传文件 + //得到上传的文件名称， + String filename = item.getName(); + //filename = item.getString("UTF-8"); + //filename = new String(filename.getBytes("iso8859-1"),"UTF-8"); + System.out.println(filename); + if(filename==null || filename.trim().equals("")){ + continue; + } + //注意：不同的浏览器提交的文件名是不一样的，有些浏览器提交上来的文件名是带有路径的，如： c:\a\b\1.txt，而有些只是单纯的文件名，如：1.txt + //处理获取到的上传文件的文件名的路径部分，只保留文件名部分 + filename = filename.substring(filename.lastIndexOf(File.separator)+1); + //得到上传文件的扩展名 + String fileExtName = filename.substring(filename.lastIndexOf(".")+1); + //如果需要限制上传的文件类型，那么可以通过文件的扩展名来判断上传的文件类型是否合法 + System.out.println("上传的文件的扩展名是："+fileExtName); + //获取item中的上传文件的输入流 + InputStream in = item.getInputStream(); + //得到文件保存的名称 + saveFilename = makeFileName(filename); + + //得到文件的保存目录 + String realSavePath = makePath(saveFilename, savePath); + System.out.print(realSavePath+"\\"+saveFilename); + //创建一个文件输出流 + FileOutputStream out = new FileOutputStream(realSavePath +File.separator+ saveFilename); + //创建一个缓冲区 + byte buffer[] = new byte[1024]; + //判断输入流中的数据是否已经读完的标识 + int len = 0; + //循环将输入流读入到缓冲区当中，(len=in.read(buffer))>0就表示in里面还有数据 + while((len=in.read(buffer))>0){ + //使用FileOutputStream输出流将缓冲区的数据写入到指定的目录(savePath + "\\" + filename)当中 + out.write(buffer, 0, len); + } + //关闭输入流 + in.close(); + //关闭输出流 + out.close(); + //删除处理文件上传时生成的临时文件 + item.delete(); + message = "文件上传成功！"; + } + } + }catch (FileUploadBase.FileSizeLimitExceededException e) { + e.printStackTrace(); + setResultError("单个文件超出最大值",writer); + return; + }catch (FileUploadBase.SizeLimitExceededException e) { + e.printStackTrace(); + setResultError("上传文件的总的大小超出限制的最大值",writer); + return; + }catch (Exception e) { + message= "文件上传失败！"; + setResultError("文件上传失败",writer); + e.printStackTrace(); + } + writer.println(saveFilename); + setResultOK(message,writer); + } + + /** + * @Method: makeFileName + * @Description: 生成上传文件的文件名，文件名以：uuid+"_"+文件的原始名称 + * @Anthor: + * @param filename 文件的原始名称 + * @return uuid+"_"+文件的原始名称 + */ + private String makeFileName(String filename){ //2.jpg + //为防止文件覆盖的现象发生，要为上传文件产生一个唯一的文件名 + return UUID.randomUUID().toString() + "_" + filename; +// return filename; + } + + /** + * 为防止一个目录下面出现太多文件，要使用hash算法打散存储 + * @Method: makePath + * @Description: + * @Anthor: + * + * @param filename 文件名，要根据文件名生成存储目录 + * @param savePath 文件存储路径 + * @return 新的存储目录 + */ + private String makePath(String filename,String savePath){ + String dir = savePath; + //File既可以代表文件也可以代表目录 + File file = new File(dir); + //如果目录不存在 + if(!file.exists()){ + //创建目录 + file.mkdirs(); + } + return dir; + } + + public void doPost(HttpServletRequest request, HttpServletResponse response) + throws ServletException, IOException { + + doGet(request, response); + } + + public void setResult(Integer code, String msg, PrintWriter writer) { + HashMap result = new HashMap<>(); + result.put("code", code); + result.put("msg", msg); + String jsonString = JSONObject.toJSONString(result); + writer.println(jsonString); + writer.close(); + } + + public void setResultError(String msg, PrintWriter writer) { + setResult(500, msg, writer); + } + + public void setResultOK(String msg, PrintWriter writer) { + setResult(200, msg, writer); + } + +} diff --git a/src/com/hellogithub/servlet/countNumServlet.java b/src/com/hellogithub/servlet/countNumServlet.java index 6f3db84..8788b8e 100644 --- a/src/com/hellogithub/servlet/countNumServlet.java +++ b/src/com/hellogithub/servlet/countNumServlet.java @@ -38,7 +38,6 @@ public class countNumServlet extends HttpServlet { resp.setHeader("Access-Control-Max-Age", "3600"); resp.setHeader("Access-Control-Allow-Headers", "access-control-allow-origin, authority, content-type, version-info, X-Requested-With"); resp.setContentType("application/json;charset=UTF-8"); - PrintWriter writer = resp.getWriter(); writer.println(projectService.countAll()); writer.close(); diff --git a/web/upload.jsp b/web/upload.jsp new file mode 100644 index 0000000..ac89095 --- /dev/null +++ b/web/upload.jsp @@ -0,0 +1,20 @@ +<%@ page language="java" pageEncoding="UTF-8" contentType="text/html;charset=UTF-8"%> + + + + 文件上传 + + + +<%request.setCharacterEncoding("UTF-8");%> +
+ 上传用户：
+ 上传文件1：
+ 上传文件2：
+ +
+ +
+ + + \ No newline at end of file