Struts2上传多个文件，下载
jopen
10年前
页面代码:
注意，我在页面在一个新建的文件夹下（TheNameSpace）
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'uplod.jsp' starting page</title> </head> <body> <h1>file upload</h1> <s:form action="uploadList.action" enctype="multipart/form-data" theme="simple"> <table cellpadding="0" height="5" > <tr> <td>用户:</td> <td> <s:textfield name="username"/> </td> </tr> <tr> <td>密码:</td> <td> <s:password name="passwrod"/></td> </tr> <tr > <td>文件:</td> <td id="fileID"> <s:fielderror name="file"/> <s:file name="file" /> <a href="javascript:addFiles()" >添加上传</a> </td> </tr> <tr> <td colspan="2"> <s:submit value="提交"/> <s:reset value="重置"/> </td> </tr> </table> </s:form> <script language="javascript"> function addFiles(){ var tdID=document.getElementById("fileID"); var br=document.createElement("br"); var file=document.createElement("input"); var button=document.createElement("input"); file.type="file"; file.name="file"; button.type="button"; button.value="remove"; button.onclick=function(){ tdID.removeChild(br); tdID.removeChild(file); tdID.removeChild(button); } tdID.appendChild(br); tdID.appendChild(file); tdID.appendChild(button); } </script> </body> </html>struts.xml配制文件:
<?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> <!-- 常量 上传文件 最大大小 --> <constant name="struts.multipart.maxSize" value="20971520"/> <!-- 包括这个xml --> <include file="strtus_1.xml"/> <!-- 后台action --> <package name="back" extends="struts-default" namespace="/TheNameSpace"> <action name="logins" class="com.rui.struts2.SpaceLogin"> <result name="success">showUser.jsp</result> </action> <action name="uploadList" class="com.rui.struts.UploadList"> <result name="success">ok.jsp</result> <result name="input">/${pageContext.request.contextPath}/TheNameSpace/uploadList.jsp</result> <!--拦截上上传文件的 大小、格式 --> <interceptor-ref name="fileUpload"> <param name="setAllowedTypes">image/pjpeg,image/gif,image/bmp,image/jpeg,image/jpg, text/plain, application/java-archive</param> <param name="maximumSize">524288</param> </interceptor-ref> <interceptor-ref name="basicStack"/> </action> <action name="upload" class="com.rui.struts.Upload"> <result name="success">ok.jsp</result> <result name="input">upload.jsp</result> </action> <action name="download" class="com.rui.struts.DownLoald"> <result type="stream"> <!-- 要下载的文件 <param name="contentDisposition">attachment;filename="bbbb.txt"</param> --> <!-- 自动寻找方法 --> <param name="inputName">downloadFile</param> </result> </action> <action name="showlist" class="com.rui.struts.ShowFileList"> <result>download.jsp</result> </action> </package> </struts>action 上传类的代码:
package com.rui.struts; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.List; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class UploadList extends ActionSupport { private String username; private String passwrod; private List<File> file; private List<String> fileFileName; private List<String> fileContentType; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPasswrod() { return passwrod; } public void setPasswrod(String passwrod) { this.passwrod = passwrod; } public List<File> getFile() { return file; } public void setFile(List<File> file) { this.file = file; } public List<String> getFileFileName() { return fileFileName; } public void setFileFileName(List<String> fileFileName) { this.fileFileName = fileFileName; } public List<String> getFileContentType() { return fileContentType; } public void setFileContentType(List<String> fileContentType) { this.fileContentType = fileContentType; } @Override public void validate() { System.out.println("执行了验证器..."); if(null==file){ addFieldError("file", "请选择文件!"); } } @Override public String execute() throws Exception { if(null==file||file.size()<=0){ addFieldError("file", "请上传符合格式的文件...."); return INPUT; } //获得路么 String path=ServletActionContext.getRequest().getRealPath("upload"); for(int i=0;i<file.size();i++){ //输入流 InputStream is=new FileInputStream(file.get(i)); //File 对象 File fileObj=new File(path,fileFileName.get(i)); //输出流 OutputStream os=new FileOutputStream(fileObj); byte [] by=new byte[400]; int length=0; while(-1!=(length=is.read(by))){ os.write(by,0,length); } os.close(); is.close(); } return SUCCESS; } }
下载页面测试 ：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'download.jsp' starting page</title> </head> <body> <s:iterator value="listName" var="lname"> <s:property value="lname"/><br/><br/> <a href="download.action?lname=<s:property value='#lname'/>" >下载文件<a> <!-- <a href="download.action?lname=DWHJ_062001.jpg">下载文件</a> --> </s:iterator> <br/><br/> </body> </html>
action 下载代码:
package com.rui.struts; import java.io.InputStream; import java.io.UnsupportedEncodingException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class DownLoald extends ActionSupport { private String lname; public String getLname() { return lname; } public void setLname(String lname) { this.lname = lname; } private String slname="" ; public InputStream getDownloadFile(){ HttpServletResponse response=ServletActionContext.getResponse(); try { slname=new String(lname.getBytes("ISO-8859-1"),"UTF-8"); } catch (UnsupportedEncodingException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } try { lname=java.net.URLEncoder.encode(slname,"utf-8"); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("ddd"+lname); response.setHeader("Content-Disposition","attachment;filename="+lname); return ServletActionContext.getServletContext(). getResourceAsStream("upload/"+slname); } //文件名如果有中文的话要进行uri中文转码 /*String encodFileNmae=""; try { encodFileNmae=java.net.URLEncoder.encode(u.getOldname(),"utf-8"); } catch (UnsupportedEncodingException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } //设置一个请求头告诉浏览器有文件要下载 response.setContentType("text/html;charset=utf-8"); response.setHeader("Content-Disposition","attachment;filename="+encodFileNmae); */ @Override public String execute() throws Exception { return SUCCESS; } }
