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.nextin
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