Apache Commons Configuration/FileUpload
一、Apache Commons-configuration(1)如果要使用configuration这个包，首先要保证使用JDK1.2以上，还要引入如下jar包
commons-beanutils
commons-lang
commons-logging
commons-collections
commons-digester
commons-codec
commons-jxpath
(2)commons-configuration最新的版本是1.5，最主要的作用是读取资源文件，每一种文件格式都有一个对应的类，如下
properties文件--PropertiesConfiguration类
xml文件--XMLConfiguration
.ini文件--INIConfiguration
.plist文件--PropertyListConfiguration
还可以从JNDI中读取properties--JNDIConfiguration
当然还可以使用system的properties--SystemConfiguration
(3)用Properties读取配置文件
usergui.properties(放在类根路径下面):
colors.background = #FFFFFF
colors.foreground = #000080
window.width = 500
window.height = 300
keys=cn,com,org,uk,edu,jp,hk
<1>一般写法：
public staticvoid readProperties(){ InputStream in=null;try {in = new BufferedInputStream((new ClassPathResource("usergui.properties")).getInputStream());} catch (IOException e1) {e1.printStackTrace();} Properties p=new Properties(); try {p.load(in);System.out.println(p.getProperty("colors.background"));} catch (IOException e) {}}
另一种ResourceBundle方式:
public static void readProperties() {Locale locale = Locale.getDefault();ResourceBundle localResource = ResourceBundle.getBundle("usergui", locale);String value = localResource.getString("colors.background");System.out.println("ResourceBundle: " + value);}
<2>使用PropertiesConfiguration
public static void loadProperty(){try {PropertiesConfiguration config = new PropertiesConfiguration("usergui.properties");config.setProperty("colors.background", "#00000F");//更改值config.save();config.save("usergui.backup.properties");//save a copySystem.out.println(config.getProperty("colors.background"));System.out.println(config.getInt("window.width"));String[] keys=config.getStringArray("keys"); List key2=config.getList("keys");for(int i=0;i<keys.length;i++){System.out.println(keys);}for(Object str:key2){System.out.println(str.toString());}}catch(Exception e){}}
二、Apache Commons-FileUpload:
package com.logcd.servlet;import java.io.File;import java.io.IOException;import java.util.Iterator;import java.util.List; import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.ServletFileUpload; @SuppressWarnings("serial")public class Upload extends HttpServlet { private String uploadPath = "D:\\uploadDir"; // 上传文件的目录 @SuppressWarnings("unchecked") public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { try { DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(4096); // 设置缓冲区大小，这里是4kb ServletFileUpload upload = new ServletFileUpload(factory); upload.setSizeMax(4194304); // 设置最大文件尺寸，这里是4MB List<FileItem> items = upload.parseRequest(request);// 得到所有的文件 Iterator<FileItem> i = items.iterator(); StringBuilder msgBuilder = new StringBuilder();//用于返回上传的文件 while (i.hasNext()) { FileItem fi = (FileItem) i.next(); String fileName = fi.getName(); if (fileName != null) { File fullFile = new File(fi.getName()); File savedFile = new File(uploadPath, fullFile.getName()); fi.write(savedFile); msgBuilder.append(fullFile.getName()); msgBuilder.append("&nbsp;&nbsp;"); msgBuilder.append("<a href=\"javascript:void(0);\" onclick=\"\" >"); msgBuilder.append("删&nbsp;除"); msgBuilder.append("</a><br/>"); } } request.setCharacterEncoding("GBK");//设置页面编码 response.setContentType("text;charset=GBK");//内容类型 response.getWriter().println("<script>parent.callback('"+ msgBuilder.toString() +"')</script>"); } catch (Exception e) { e.printStackTrace(); response.sendRedirect("<script>parent.callback('sorry,文件上传失败！')</script>"); } } public void init() throws ServletException { File uploadFile = new File(uploadPath); if (!uploadFile.exists()) { uploadFile.mkdirs(); } }}
upload.html实现无刷新文件上传。
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=GB2312"><title>文件上传</title><style type="text/css">body{ font-size: 12px;}a{ text-decoration: none;}</style></head><body><form action="fileupload" id="form1" name="form1" encType="multipart/form-data"method="post" target="hidden_frame" ><span id="msg"></span><br><input type="file" id="file" name="file" accept="doc,xls,rar" style="border:1px solid #2D147E;background:#eeeeee;color:#2D147E;font:bold 12px ’隶书’;height:18px;width:300px" onchange="uploadFile(this);"><br><font style="color: red;font-size: 12px;">信息提示：支持doc,xls,rar文件的上传</font> <iframe name='hidden_frame' id="hidden_frame" style='display:none'></iframe></form></body></html><script type="text/javascript">function $(id){ return document.getElementById(id);}function verifyAccept(obj){var aAccetpType, sFileType;var sAccetpType = obj.accept.toLowerCase();if(sAccetpType.length > 0){aAccetpType = sAccetpType.split(",");}if(obj.value != "" && aAccetpType.length > 0){sFileType = obj.value.replace(/.*\./g,"").toLowerCase();var isAccept = sAccetpType.indexOf(sFileType);if(isAccept == -1) {alert("不支持此文件类型！");obj.outerHTML = obj.outerHTML;return false;}}return true;}function uploadFile(obj){ if(verifyAccept(obj)){ $("form1").submit(); }}function callback(msg){$("file").outerHTML = $("file").outerHTML;$("msg").innerHTML = $("msg").innerHTML + "<font color=green>"+msg+"</font>";}</script>
<servlet> <servlet-name>Upload</servlet-name> <servlet-class>com.logcd.servlet.Upload</servlet-class> </servlet> <servlet-mapping> <servlet-name>Upload</servlet-name> <url-pattern>/fileupload</url-pattern> </servlet-mapping>
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