jsp心得.doc

jsp中如何获取客户端的浏览器和操作系统信息-JSP教程,Jsp/Servletstring agent = request.getheader(user-agent); stringtokenizer st = new stringtokenizer(agent,;); st.nexttoken(); /得到用户的浏览器名 string userbrowser = st.nexttoken(); /得到用户的操作系统名 string useros = st.nexttoken(); 取得本机的信息也可以这样： 操作系统信息 system.getproperty(); /win2003竟然是win xp？ system.getproperty(os.version); system.getproperty(os.arch); 瀏覽器： request.getheader(user-agent) 再送个红包 request.getheader(“user-agent”)返回客户端浏览器的版本号、类型 getheader(string name)：获得http协议定义的传送文件头信息， request. getmethod()：获得客户端向服务器端传送数据的方法有get、post、put等类型 request. getrequesturi()：获得发出请求字符串的客户端地址 request. getservletpath()：获得客户端所请求的脚本文件的文件路径 request. getservername()：获得服务器的名字 request.getserverport()：获得服务器的端口号 request.getremoteaddr()：获得客户端的ip地址 request.getremotehost()：获得客户端电脑的名字，若失败，则返回客户端电脑的ip地址 request.getprotocol()： request.getheadernames()：返回所有request header的名字，结果集是一个enumeration（枚举）类的实例 request.getheaders(string name)：返回指定名字的request header的所有值，结果集是一个enumeration（枚举）类的实例1.图片上传的类package com.elkan.kindeditor.upload;import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.Arrays;import java.util.Date;import java.util.Iterator;import java.util.List;import java.util.Random;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import mons.fileupload.FileItem;import mons.fileupload.FileItemFactory;import mons.fileupload.FileUploadException;import mons.fileupload.disk.DiskFileItemFactory;import mons.fileupload.servlet.ServletFileUpload;import com.elkan.utils.ImageUtil;/* * 实现KindEditor图片上传的Servlet * * author SENHUI * * since 2011/03/21 20:20:23 */public class UploadImage extends HttpServlet private static final long serialVersionUID = 5121794650920770832L;/ 上传图片的最大宽度protected int MAX_WIDTH = -1;/ 上传图片的最大高度protected int MAX_HEIGHT = -1;/ 上传图片的大小protected long MAX_SIZE = 1000000;/ 定义允许上传的图片的扩展名protected String IMAGETYPES = new String gif, jpg, jpeg, png, bmp ;/ 定义上传图片保存目录路径protected String UPLOAD_PATH = ;/ 上传图片设置信息 protected String id = ; / 上传图片的TITLE属性值protected String imgTitle = ; protected int imgWidth = -1; protected int imgHeight = -1; protected String imgBorder = ; protected String resizeImg = ;protected boolean isFlag = false;protected String tempTitle = ;SuppressWarnings(deprecation)Overrideprotected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException response.setContentType(text/html; charset=UTF-8);PrintWriter out = response.getWriter();String savePath = this.getInitParameter(UPLOAD_PATH);if (savePath = null | savePath.isEmpty() out.println(alertMsg(你还没设置上传图片保存的目录路径!);return;/判断是否设置了上传图片的大小if(this.getInitParameter(MAX_SIZE) != null)MAX_SIZE = Integer.parseInt(this.getInitParameter(MAX_SIZE);/判断是否设置了上传图片的类型if(this.getInitParameter(IMAGETYPES) != null)IMAGETYPES = toArray(this.getInitParameter(IMAGETYPES);/ 图片保存目录路径String uploadPath = new StringBuffer(request.getSession().getServletContext().getRealPath(/).append(savePath).toString();/ 图片保存目录URLString saveUrl = new StringBuffer(request.getContextPath().append(/).append(savePath).toString();/ 检查上传图片是否存在if (!ServletFileUpload.isMultipartContent(request) out.println(alertMsg(请选择你要上传的图片!);return;/ 检查目录File uploadDir = new File(uploadPath);if (!uploadDir.isDirectory() out.println(alertMsg(上传图片保存的目录不存在。);return;/ 检查目录写权限if (!uploadDir.canWrite() out.println(alertMsg(上传图片保存的目录没有写权限。);return;/ 准备上传图片FileItemFactory factory = new DiskFileItemFactory();ServletFileUpload upload = new ServletFileUpload(factory);upload.setHeaderEncoding(UTF-8);List items = null;String temp = null;try items = upload.parseRequest(request);Iterator itr = items.iterator();while (itr.hasNext() FileItem item = (FileItem) itr.next(); / 上传图片的原文件名 String fileName = item.getName(); temp = (String) item.getName(); if(temp != null & !isFlag) temp = temp.substring(temp.lastIndexOf()+1); tempTitle = temp; isFlag = true; / KindEditor编辑器的ID if(String)item.getFieldName().equals(id) id = item.getString(); / 上传图片的重新提示 if(String)item.getFieldName().equals(imgTitle) imgTitle = item.getString(); if(imgTitle != null) imgTitle = new String(imgTitle.getBytes(ISO8859-1),UTF-8); / 设置图片的宽度 if(String)item.getFieldName().equals(imgWidth) String imgWidth = item.getString(); if(imgWidth != null & !imgWidth.isEmpty() this.imgWidth = Integer.parseInt(imgWidth); / 设置图片的高度 if(String)item.getFieldName().equals(imgHeight) String imgHeight = item.getString(); if(imgHeight != null & !imgHeight.isEmpty() this.imgHeight = Integer.parseInt(imgHeight); / 设置图片的边框 if(String)item.getFieldName().equals(imgBorder) imgBorder = item.getString(); long fileSize = item.getSize();if (!item.isFormField() / 检查文件大小if (fileSize MAX_SIZE) out.println(alertMsg(上传文件大小超过限制。);return;/ 检查扩展名String fileExt = fileName.substring(fileName.lastIndexOf(.) + 1).toLowerCase();if (!Arrays. asList(IMAGETYPES).contains(fileExt) out.println(alertMsg(上传图片扩展名是不允许的扩展名。);return;/ 根据时间创建文件夹SimpleDateFormat folderNameFormat = new SimpleDateFormat(yyyyMMdd);String realPath = uploadPath + folderNameFormat.format(new Date();File folder = new File(realPath);boolean flag = folder.exists();/ 确认文件夹是否已经存在if(!flag)flag = folder.mkdir();/ 创建文件夹并上传图片if(flag)SimpleDateFormat fileNameFormat = new SimpleDateFormat(yyyyMMddHHmmss);String newFileName = fileNameFormat.format(new Date() + _+ new Random().nextInt(1000) + . + fileExt;File uploadedFile = new File(realPath, newFileName);item.write(uploadedFile);resizeImg = uploadedFile.getPath();resizeImg = resizeImg.replaceAll(, /);saveUrl += folderNameFormat.format(new Date() + / + newFileName;elseSystem.out.println( 文件夹创建失败，请确认磁盘没有写保护并且空件足够);/ 判断是否设置图片的最大宽度与高度String max_width = this.getInitParameter(MAX_WIDTH);String max_height = this.getInitParameter(MAX_HEIGHT);if(max_width != null & !max_width.isEmpty()MAX_WIDTH = Integer.parseInt(max_width);if(max_height != null & !max_height.isEmpty()MAX_HEIGHT = Integer.parseInt(max_height);if(imgTitle = null | imgTitle.isEmpty()imgTitle = tempTitle;/ 判断是否要压缩图片if(MAX_WIDTH != -1 | MAX_HEIGHT != -1) / 压缩图片ImageUtil.resizeImg(resizeImg, resizeImg, MAX_WIDTH, MAX_HEIGHT);if(this.imgWidth ImageUtil.ImgWidth)this.imgWidth = ImageUtil.ImgWidth;if(this.imgHeight ImageUtil.ImgHeight)this.imgHeight = ImageUtil.ImgHeight;/ 返回编辑器out.println(insertEditor(id, saveUrl, imgTitle, imgWidth, imgHeight, imgBorder);else/ 返回编辑器out.println(insertEditor(id, saveUrl, imgTitle, imgWidth, imgHeight, imgBorder); catch (FileUploadException e) e.printStackTrace(); catch (Exception e) e.printStackTrace();finallyout.flush();out.close();isFlag = false;Overrideprotected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException doGet(request, response);/* * 输出打印上传失败的JSON语句 * * param message 失败信息 * * return 页面上传失败的JSON语句 */public String alertMsg(String message) StringBuffer sb = new StringBuffer(error:1,message:);sb.append(message).append();return sb.toString();/* * 输出插入图片至编辑器语句的脚本 * * param id 编辑器ID * * param saveUrl 上传图片的浏览地址 * * param imgTitle 图片的提示信息 * * param imgWidth 设置图片的宽度 * * param imgHeight 设置图片的宽度 * * param imgBorder 设置图片的边框 * * return 插入图片至编辑器的脚本语句 */public String insertEditor(String id, String saveUrl, String imgTitle, int imgWidth, int imgHeight, String imgBorder)StringBuffer sb = new StringBuffer();sb.append(parent.KE.pluginimage.insert().append(id).append(,);sb.append(saveUrl).append(,).append(imgTitle).append(,);sb.append(imgWidth).append(,).append(imgHeight).append(,);sb.append(imgBorder).append(););sb.append();return sb.toString();/* * 输出允许上传图片类型的数组 * * param filesType 允许上传的图片类型 * * return 允许上传图片类型 */public String toArray(String filesType)if(filesType = null)return null;String types = filesType.split(,);String allowTypes = new Stringtypes.length;int i = 0;for(String type : types)allowTypesi = type;i+;return allowTypes;2.上传图片管理类package com.elkan.kindeditor.upload;import java.io.File;import java.io.IOException;import java.io.PrintWriter;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Arrays;import java.util.Collections;import java.util.Comparator;import java.util.Hashtable;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class UploadImageManager extends HttpServlet private static final long serialVersionUID = -8359652838938248988L;/ 定义允许上传的图片的扩展名protected String FILETYPES = new String gif, jpg, jpeg, png, bmp ;/ 定义上传图片保存目录路径protected String UPLOAD_PATH = ;public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException response.setContentType(text/html; charset=UTF-8);PrintWriter out = response.getWriter();String savePath = this.getInitParameter(UPLOAD_PATH);if (savePath = null | savePath.isEmpty() out.println(alertMsg(你还没设置读取上传图片保存的目录路径!);return;/ 图片保存目录路径String rootPath = new StringBuffer(request.getSession().getServletContext().getRealPath(/).append(savePath).toString();/ 图片保存目录URLString rootUrl = new StringBuffer(request.getContextPath().append(/).append(savePath).toString();/根据path参数，设置各路径和URLString path = request.getParameter(path) != null ? request.getParameter(path) : ;String currentPath = rootPath + path;String currentUrl = rootUrl + path;String currentDirPath = path;String moveupDirPath = ;if (!.equals(path) String str = currentDirPath.substring(0, currentDirPath.length() - 1);moveupDirPath = str.lastIndexOf(/) = 0 ? str.substring(0, str.lastIndexOf(/) + 1) : ;/排序形式，name or size or typeString order = request.getParameter(order) != null ? request.getParameter(order).toLowerCase() : name;/不允许使用.移动到上一级目录if (path.indexOf(.) = 0) out.println(alertMsg(不允许使用移动到上一级目录);return;/最后一个字符不是/if (!.equals(path) & !path.endsWith(/) out.println(Parameter is not valid.);return;/目录不存在或不是目录File currentPathFile = new File(currentPath);if(!currentPathFile.isDirectory()out.println(Directory does not exist.);return;/遍历目录取的文件信息ListHashtable fileList = new ArrayListHashtable();if(currentPathFile.listFiles() != null) for (File file : currentPathFile.listFiles() Hashtable hash = new Hashtable();String fileName = file.getName();if(file.isDirectory() hash.put(is_dir, true);hash.put(has_file, (file.listFiles() != null);hash.put(filesize, 0L);hash.put(is_photo, false);hash.put(filetype, ); else if(file.isFile()String fileExt = fileName.substring(fileName.lastIndexOf(.) + 1).toLowerCase();hash.put(is_dir, false);hash.put(has_file, false);hash.put(filesize, file.length();hash.put(is_photo, Arrays.asList(FILETYPES).contains(fileExt);hash.put(filetype, fileExt);hash.put(filename, fileName);hash.put(datetime, new SimpleDateFormat(yyyy-MM-dd HH:mm:ss).format(file.lastModified();fileList.add(hash);if (size.equals(order) Collections.sort(fileList, new SizeComparator(); else if (type.equals(order) Collections.sort(fileList, new TypeComparator(); else Collections.sort(fileList, new NameComparator();out.println(toJSONString(currentUrl, currentDirPath, moveupDirPath, fileList);out.flush();out.close();public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException doGet(request, response);/* * 输出打印上传失败语句的脚本 * * param message 失败信息 * * return 页面打印的脚本语句 */public String alertMsg(String message) StringBuffer sb = new StringBuffer();sb.append(alert().append(message).append(););sb.append();return sb.toString();public String toJSONString(String currentUrl, String currentDirPath, String moveupDirPath, ListHashtable fileList)StringBuilder sb = new StringBuilder(current_url:);sb.append(currentUrl).append(,).append(current_dir_path:);sb.append(currentDirPath).append(,moveup_dir_path:).append(moveupDirPath).append(,);sb.append(file_list:);int i = 0;sb.append();for(Hashtable he : fileList)if(i != (fileList.size() - 1)sb.append(filename:).append(he.get(filename).append(,);sb.append(filesize:).append(he.get(filesize).append(,);sb.append(filetype:).append(he.get(filetype).append(,);sb.append(has_file:).append(he.get(has_file).append(,);sb.append(is_dir:).append(he.get(is_dir).append(,);sb.append(is_photo:).append(he.get(is_photo).append(,);sb.append(datetime:).append(he.get(datetime).append();sb.append(,);elsesb.append(filename:).append(he.get(filename).append(,);sb.append(filesize:).append(he.get(filesize).append(,);sb.append(filetype:).append(he.get(filetype).append(,);sb.append(has_file:).append(he.get(has_file).append(,);sb.append(is_dir:).append(he.get(is_dir).append(,);sb.append(is_photo:).append(he.get(is_photo).append(,);sb.append(datetime:).append(he.get(datetime).append();sb.append();i+;i = 0;sb.append(,total_count:).append(fileList.size().append();return sb.toString();public class NameComparator implements Comparator public int compare(Object a, Object b) Hashtable hashA = (Hashtable) a;Hashtable hashB = (Hashtable) b;if (Boolean) hashA.get(is_dir)& !(Boolean) hashB.get(is_dir) return -1; else if (!(Boolean) hashA.get(is_dir)& (Boolean) hashB.get(is_dir) return 1; else return (String) hashA.get(filename).compareTo(String) hashB.get(filename);public class SizeComparator implements Comparator public int compare(Object a, Object b) Hashtable hashA = (Hashtable) a;Hashtable hashB = (Hashtable) b;if (Boolean) hashA.get(is_dir)& !(Boolean) hashB.get(is_dir) return -1; else if (!(Boolean) hashA.get(is_dir)& (Boolean) hashB.get(is_dir) return 1; else if (Long) hashA.get(filesize) (Long) hashB.get(filesize) return 1; else if (Long) hashA.get(filesize) (Long) hashB.get(filesize) return -1; else return 0;public class TypeComparator implements Comparator public int compare(Object a, Object b) Hashtable hashA = (Hashtable) a;Hashtable hashB = (Hashtable) b;if (Boolean) hashA.get(is_dir)& !(Boolean) hashB.get(is_dir) return -1; else if (!(Boolean) hashA.get(is_dir)& (Boolean) hashB.get(is_dir) return 1; else return (String) hashA.get(filetype).compareTo(String) hashB.get(filetype);3.上传附件的类package com.elkan.kindeditor.upload;import java.io.File;