Struts2中的多文件上傳：實例
第一步：先創建一個上傳文件的jsp頁面（upload.jsp）
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!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=utf-8">
<title>Insert title here</title>
</head>
<body>
<form action="upload" method="post" enctype="multipart/form-data">
文件上傳：<br/>
<input type="file" name="myfile"/><br/>
<input type="file" name="myfile"/><br/>
<input type="file" name="myfile"/><br/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
第二步：在src目錄下新建一個com.test.action包，然後新建一個 UploadAction 類
package com.gyx.action;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.Action;
public class UploadAction implements Action {
private File[] myfile;
private String[] myfileFileName;
private String[] myfileContentType;
private String savepath = "/upload";
@Override
public String execute() throws Exception {
String realpath = ServletActionContext.getServletContext().getRealPath(savepath);
File file = new File(realpath);
if (!file.exists()) {
file.mkdirs();
}
HttpServletRequest request = ServletActionContext.getRequest();
List imgpath = new ArrayList();
for (int i=0;i<myfile.length;i++) {
FileUtils.copyFile(myfile[i], new File(file, myfileFileName[i]));
imgpath.add("/Struts"+savepath+"/"+myfileFileName[i]);
}
request.setAttribute("imgpath",imgpath);
return SUCCESS;
}
public File[] getMyfile() {
return myfile;
}
public void setMyfile(File[] myfile) {
this.myfile = myfile;
}
public String[] getMyfileFileName() {
return myfileFileName;
}
public void setMyfileFileName(String[] myfileFileName) {
this.myfileFileName = myfileFileName;
}
public String[] getMyfileContentType() {
return myfileContentType;
}
public void setMyfileContentType(String[] myfileContentType) {
this.myfileContentType = myfileContentType;
}
}
第三步：在src目錄下新建一個struts.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd" >
<struts>
<constant name="struts.i18n.encoding" value="UTF-8"></constant>
<constant name="devMode" value="true"></constant>
<package name="gyx" extends="struts-default">
<!-- 上傳文件action -->
<action name="upload" class="com.gyx.action.UploadAction">
<interceptor-ref name="defaultStack">
<!--允許文件上傳的類型（這裏爲了方便顯示，只允許圖片上傳）-->
<param name="fileUpload.allowedTypes">image/jpg,image/jpeg,image/png</param>
<!--允許文件上傳的擴展名-->
<param name="fileUpload.allowedExtensions">.jpg,.png,.gif</param>
</interceptor-ref>
<result>/index.jsp</result>
<result name="input" type="redirect">upload.jsp</result>
</action>
</package>
</struts>
第四步：文件上傳成功後，我們需要一個頁面展示；我們新建一個 index.jsp 頁面用來顯示上傳的圖片。
<%@ page isELIgnored="false" language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!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=utf-8">
<title>首頁</title>
</head>
<body>
首頁
<s:iterator value="#request.imgpath" var="path" status="i">
<img alt="圖片無法顯示" src="<s:property value='path'/>">
</s:iterator>
</body>
</html>