Struts上传多个文件的例子
最近一个基于Struts的项目中要用到上传多张图片到系统中，我在网上找了一下，发现大多数都是转载的例 子，对项目的作用不大，故写下了这个例子，希望对有用到的朋友有所帮助。要求JDK1.5以上，lib库要包含如下jar文 件：antlr.jar，commons-beanutils.jar，commons-collections.jar，commons- digester.jar，commons-fileupload.jar，commons-logging.jar，commons- validator.jar，jakarta-oro.jar，struts.jar这些都是Struts中的jar文件以及Struts中的标签库文 件。
//可以转载，请保留出自http://www.javaresearch.org,作者anEngineer
一：web.xml文件
< ?xml version="1.0" encoding="UTF-8"?> < !DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd"> < web-app> < servlet> < servlet-name>actionServlet< /servlet-name> < servlet-class>org.apache.struts.action.ActionServlet< /servlet-class> < init-param> < param-name>config< /param-name> < param-value>/WEB-INF/struts-config.xml< /param-value> < /init-param> < init-param> < param-name>debug< /param-name> < param-value>2< /param-value> < /init-param> < load-on-startup>0< /load-on-startup> < /servlet> < !-- struts actionServlet mapping--> < servlet-mapping> < servlet-name>actionServlet< /servlet-name> < url-pattern>*.do< /url-pattern> < /servlet-mapping> < !-- welcome file list --> < welcome-file-list> < welcome-file>index.jsp< /welcome-file> < /welcome-file-list> < !-- error handle --> < error-page> < error-code>404< /error-code> < location>/error.jsp< /location> < /error-page> < /web-app>
二：struts-config.xml文件
< ?xml version="1.0" encoding="ISO-8859-1" ?> < !DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"> < struts-config> < !-- form beans --> < form-beans> < form-bean name="uploadForm" type="org.apache.struts.action.DynaActionForm"> < form-property name="type" type ="java.lang.String[]"/> < form-property name="name" type ="java.lang.String[]"/> < form-property name="file0" type ="org.apache.struts.upload.FormFile"/> < form-property name="file1" type ="org.apache.struts.upload.FormFile"/> < form-property name="file2" type ="org.apache.struts.upload.FormFile"/> < form-property name="file3" type ="org.apache.struts.upload.FormFile"/> < form-property name="file4" type ="org.apache.struts.upload.FormFile"/> < form-property name="file5" type ="org.apache.struts.upload.FormFile"/> < form-property name="file6" type ="org.apache.struts.upload.FormFile"/> < form-property name="file7" type ="org.apache.struts.upload.FormFile"/> < form-property name="file8" type ="org.apache.struts.upload.FormFile"/> < form-property name="file9" type ="org.apache.struts.upload.FormFile"/> < /form-bean> < /form-beans> < !-- forward --> < global-forwards> < forward name= "successed" path="/index.jsp">< /forward> < forward name= "failed" path="/error.jsp">< /forward> < /global-forwards> < !-- action handle--> < action-mappings> < action path="/uploaded" type="com.fangchuang.action.UploadAction" name="uploadForm" scope="request" input="/upload.jsp"> < forward name="uploaded" path="/upload.jsp">< /forward> < /action> < /action-mappings> < /struts-config>
三：upload.jsp文件
< %@ page language="java" import="java.util.*" pageEncoding="gb2312" errorPage="error.jsp"%>
< %@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%>
< %@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean"%>
< %@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic"%>
< %@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="title"%>
< !-- 上传多个文件的jsp文件
//可以随便转载，请保留出自http://www.javaresearch.org 作者anEngineer
-->
< html>
< head>
< title>上传多个文件的jsp文件< /title>
< meta http-equiv="pragma" content="no-cache">
< meta http-equiv="cache-control" content="no-cache">
< meta http-equiv="expires" content="0">
< meta http-equiv="keywords" content="struts,多个文件,上传">
< meta http-equiv="description" content="This is a test">
< /head>
< body>
< html:form action="uploaded.do" enctype="multipart/form-data" method="post">
< table border="1" width="80%" align="center">
< tr bgColor=#62bcff>
< td align="left">文件类型< /td>
< td align="left">文件描述< /td>
< td align="left">文件名< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1" selected>湖南省< /option>
< option value="2">湖北省< /option>
< option value="3">广东省< /option>
< option value="4">北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file0" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1"selected>湖南省< /option>
< option value="2">湖北省< /option>
< option value="3">广东省< /option>
< option value="4">北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file1" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2"selected>湖北省< /option>
< option value="3">广东省< /option>
< option value="4">北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file2" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2"selected>湖北省< /option>
< option value="3">广东省< /option>
< option value="4">北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file3" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2">湖北省< /option>
< option value="3"selected>广东省< /option>
< option value="4">北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file4" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2">湖北省< /option>
< option value="3"selected>广东省< /option>
< option value="4">北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file5" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2">湖北省< /option>
< option value="3">广东省< /option>
< option value="4"selected>北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file6" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2">湖北省< /option>
< option value="3">广东省< /option>
< option value="4"selected>北京市< /option>
< option value="5">上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file7" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2">湖北省< /option>
< option value="3">广东省< /option>
< option value="4">北京市< /option>
< option value="5"selected>上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file8" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left">< select name="type">
< option value="1">湖南省< /option>
< option value="2">湖北省< /option>
< option value="3">广东省< /option>
< option value="4">北京市< /option>
< option value="5"selected>上海市< /option>
< /select>< /td>
< td align="left">< input type="text" name="name" value="">< /td>
< td align="left">< input type="file" name="file9" size="35" value="">
< /td>
< /tr>
< tr>
< td align="left"> < /td>
< td align="left"> < /td>
< td align="left">< input type="submit" value="上传文件" value="submit"
onclick="return(confirm('你确认要上传文件吗?'))">< /td>
< /tr>
< /table>
< /html:form>
< /body>
< /html>
四：还有两个简单jsp文件index.jsp,error.jsp可以自己写。
五：action文件
package com.fangchuang.action;
/**
* @author anEngineer 处理上传文件action
*/
public class UploadAction extends Action {
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
//可以随便转载，请保留出自http://www.javaresearch.org 作者anEngineer
DynaActionForm fileForm = (DynaActionForm) form;
String[] types = (String[]) fileForm.get("type");
String[] names = (String[]) fileForm.get("name");
FormFile file0 = (FormFile) fileForm.get("file0");
FormFile file1 = (FormFile) fileForm.get("file1");
FormFile file2 = (FormFile) fileForm.get("file2");
FormFile file3 = (FormFile) fileForm.get("file3");
FormFile file4 = (FormFile) fileForm.get("file4");
FormFile file5 = (FormFile) fileForm.get("file5");
FormFile file6 = (FormFile) fileForm.get("file6");
FormFile file7 = (FormFile) fileForm.get("file7");
FormFile file8 = (FormFile) fileForm.get("file8");
FormFile file9 = (FormFile) fileForm.get("file9");
Map< String, FormFile> fileMap = new HashMap< String, FormFile>();
fileMap.put("file0" + "*" + types[0] + "*" + names[0], file0);
fileMap.put("file1" + "*" + types[1] + "*" + names[1], file1);
fileMap.put("file2" + "*" + types[2] + "*" + names[2], file2);
fileMap.put("file3" + "*" + types[3] + "*" + names[3], file3);
fileMap.put("file4" + "*" + types[4] + "*" + names[4], file4);
fileMap.put("file5" + "*" + types[5] + "*" + names[5], file5);
fileMap.put("file6" + "*" + types[6] + "*" + names[6], file6);
fileMap.put("file7" + "*" + types[7] + "*" + names[7], file7);
fileMap.put("file8" + "*" + types[8] + "*" + names[8], file8);
fileMap.put("file9" + "*" + types[9] + "*" + names[9], file9);
Set fileSet = fileMap.entrySet();
Iterator iter = fileSet.iterator();
// 取当前系统路径E:\Tomcat5\webapps\strutsUpload\ 其中strutsUpload为当前context
String filePath = this.getServlet().getServletContext().getRealPath("/");
// 保存文件的文件夹
File savePath = new File(filePath + "UploadFiles\\");
filePath = filePath+ "UploadFiles\\";
if (!savePath.exists()) {
savePath.mkdir();
}
while (iter.hasNext()) {
Map.Entry unit = (Map.Entry) iter.next();
String key = (String) unit.getKey();
FormFile file = (FormFile) unit.getValue();
//文件大小符合要求，且是图片文件
if ((file.getFileSize() >= 1)&& DealPhoto.isPhoto(file)) {
//图片类别
String photoType = key.substring(key.indexOf("*") + 1, key
.lastIndexOf("*"));
//图片描述
String photoName = key.substring(key.lastIndexOf("*") + 1, key
.length());
//存数据库操作，在数据库中保存文件的名称，类型，及在服务器上的相对路径
//
//判断是否重名
if(DealPhoto.isFileExist(file.getFileName(),filePath))
DealPhoto.rename(file.getFileName(),filePath);
try {
InputStream stream = file.getInputStream();// 把文件读入
// 建立一个上传文件的输出流
OutputStream bos = new FileOutputStream(filePath+file.getFileName());
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {
bos.write(buffer, 0, bytesRead);// 将文件写入服务器
}
bos.close();
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
return mapping.findForward("uploaded");
//还有其他可以改正的地方，如错误信息提示，把照片处理函数放到一个公用类,写文件操作等
//可以随便转载，请保留出自http://www.javaresearch.org 作者anEngineer
}
}
六：照片处理类文件
package com.fangchuang.run;
/**
* 图片处理
* @author anEngineer
*
*/
public class DealPhoto {
/**
* 判断照片类型 .jpg .png .gif 目前只支持这三种格式
* @param file
* @return
*/
public static boolean isPhoto(FormFile file) {
String fileName = getString(file.getFileName());
if (fileName.equals(""))
return false;
if ((fileName.toLowerCase().endsWith(".jpg"))
|| (fileName.toLowerCase().endsWith(".gif"))
|| (fileName.toLowerCase().endsWith(".png")))
return true;
else
return false;
}
/**
*
* @param str
* @return
*/
public static String getString(String str) {
if (str == null)
str = "";
if (str.equals("null"))
str = "";
str = str.trim();
return str;
}
/**
* 判断文件是否存在
* @param fileName
* @param dir
* @return
*/
public static boolean isFileExist(String fileName, String dir) {
File files = new File(dir + fileName);
return (files.exists()) ? true : false;
}
/**
* 重命名
* @param fileName
* @param dir
*/
public static void rename(String fileName, String dir) {
String extendFile = "";
if (isJpg(fileName))
extendFile = ".jpg";
else if (isGif(fileName))
extendFile = ".gif";
else if (isPng(fileName))
extendFile = ".png";
else
extendFile = ".jpg";
Random random = new Random();
int add = random.nextInt(10000);
String ret = fileName + add + extendFile;
while (isFileExist(ret, dir)) {
add = random.nextInt(10000);
ret = fileName + add + extendFile;
}
File file = new File(dir + fileName);
File reFile = new File(dir + ret);
file.renameTo(reFile);
}
public static boolean isGif(String file) {
if (file.toLowerCase().endsWith(".gif")) {
return true;
} else {
return false;
}
}
public static boolean isJpg(String file) {
if (file.toLowerCase().endsWith(".jpg")) {
return true;
} else {
return false;
}
}
public static boolean isPng(String file) {
if (file.toLowerCase().endsWith(".png")) {
return true;
} else {
return false;
}
}
}