Struts1文件上传、单文件、多文件上传【Struts1】
1、单文件上传
1）JSP页面（singleFileUpload.jsp）
<%@page pageEncoding = "UTF-8"%> <h1> 文件上传 </h1> <hr /> <form action="upload.action" method="post" enctype="multipart/form-data"> name: <input type="text" name="name" /> <br /> upload: <input type="file" name="file" /> <br /> <input type="submit" value="上传" /> </form>
//操作点：enctype="multipart/form-data"
2）Form（UploadForm）
package fileUpload.singleFileUpload.form; import org.apache.struts.action.ActionForm; import org.apache.struts.upload.FormFile; public class UploadForm extends ActionForm { private static final long serialVersionUID = 1L; private String name; private FormFile file; public String getName() { return name; } public void setName(String name) { this.name = name; } public FormFile getFile() { return file; } public void setFile(FormFile file) { this.file = file; } }
//操作点：Struts1提供了一个FormFile类来处理文件上传操作，另外注意，属性name，file名字必须与jsp页面一致，否则会报空指针。
3）Action（UploadAction）
package fileUpload.singleFileUpload.action; import java.io.FileOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.upload.FormFile; import fileUpload.singleFileUpload.form.UploadForm; public class UploadAction extends Action { // @Override public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception { UploadForm uf = (UploadForm)form; String name = uf.getName(); FormFile file = uf.getFile(); System.out.println("name=" + name); String filename = file.getFileName(); System.out.println("fileName=" + filename); FileOutputStream fos = new FileOutputStream("d:\\["+name+"]" + filename); //创建输出流 fos.write(file.getFileData()); //写入 fos.flush();//释放 fos.close(); //关闭 return mapping.findForward("success"); } }
//操作点：FormFile类的方法
4）Struts配置文件（struts-config.xml）
<!-- 配置 单个上传 --> <form-bean name="uploadForm" type="fileUpload.singleFileUpload.form.UploadForm" /> <!-- 配置 单个上传 --> <action path="/upload" type="fileUpload.singleFileUpload.action.UploadAction" name="uploadForm" scope="request"> <forward name="success" path="/singleFileUpload.jsp" /> </action> <!-- 配置文件上传大小 --> <!-- 规定了最大上传大小是2M，如果设置成-1则大小无限制了 --> <controller maxFileSize="2M" /> <!--操作点：controller maxFileSize用来配置上传文件的大小，可根据实际情况配置，设置成-1则表示无限制。其位置必须放在</action-mappings>和<message-resources>之间-->
2、多文件上传
1）JSP页面（mutityFileUpload.jsp）（从网上获得的代码，可增可减，不错）
<%@ page pageEncoding="utf-8"%> <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <html> <head> <title>上传任意多个文件（总大小不能超过2M)</title> <script language="javascript"> // 在DOM中插入一个上传文件列表项（div元素)和一个<input type="file"/>元素 function insertNextFile(obj) { // 获取上传控制个数 var childnum = document.getElementById("files").getElementsByTagName("input").length; var id = childnum - 1; var fullName = obj.value; // 插入<div>元素及其子元素 var fileHtml = ''; fileHtml += '<div id = "file_preview' + id + '" style ="border-bottom: 1px solid #CCC;">'; fileHtml += '<img width =30 height = 30 src ="images/file.gif" title="' + fullName + '"/>'; fileHtml += '<a href="javascript:;" onclick="removeFile(' + id + ');">删除</a> '; fileHtml += fullName.substr(fullName.lastIndexOf('\\')+1) +' </div>'; var fileElement = document.getElementById("files_preview"); fileElement.innerHTML = fileElement.innerHTML + fileHtml; obj.style.display = 'none'; // 隐藏当前的<input type=”file”/>元素 addUploadFile(childnum); // 插入新的<input type=”file”/>元素 } // 插入新的<input type=”file”/>元素，适合于不同的浏览器（包括IE、FireFox等） function addUploadFile(index) { try // 用于IE浏览器 { var uploadHTML = document.createElement( "<input type='file' id='file_" + index + "' name='file[" + index + "]' onchange='insertNextFile(this)'/>"); document.getElementById("files").appendChild(uploadHTML); } catch(e) // 用于其他浏览器 { var uploadObj = document.createElement("input"); uploadObj.setAttribute("name", "file[" + index + "]"); uploadObj.setAttribute("onchange", "insertNextFile(this)"); uploadObj.setAttribute("type", "file"); uploadObj.setAttribute("id", "file_" + index); document.getElementById("files").appendChild(uploadObj); } } function removeFile(index) // 删除当前文件的<div>和<input type=”file”/>元素 { document.getElementById("files_preview").removeChild(document.getElementById("file_preview" + index)); document.getElementById("files").removeChild(document.getElementById("file_" + index)); } function showStatus(obj) // 显示“正在上传文件”提示信息 { document.getElementById("status").style.visibility="visible"; } </script> </head> <body> <html:form enctype="multipart/form-data" action="multiUpload"> <span id="files"> <%-- 在此处插入用于上传文件的input元素 --%> <input type="file" id="file_0" name="file[0]" onchange="insertNextFile(this)" /> </span> <html:submit value=" 上传 " onclick="showStatus(this);" /> </html:form> <p> <div id="status" style="visibility: hidden; color: Red"> 正在上传文件 </div> <p> <%-- 在此处用DOM技术插入上传文件列表项 --%> <div id="files_preview" style="width: 500px; height: 500px; overflow: auto"></div> </body> </html>
2）Form（UploadMoreForm）
package fileUpload.mutityFileUpload.form; import java.util.ArrayList; import java.util.List; import org.apache.struts.action.ActionForm; import org.apache.struts.upload.FormFile; public class UploadMoreForm extends ActionForm{ private static final long serialVersionUID = 1L; private List<FormFile> myFiles = new ArrayList<FormFile>(); // 用于保存不定数量的FormFile对象 public FormFile getFile(int i) // 索引属性 { return myFiles.get(i); } public void setFile(int i, FormFile myFile) // 索引属性 { if (myFile.getFileSize() > 0) // 只有上传文件的字节数大于0，才上传这个文件 { myFiles.add(myFile); } } public int getFileCount() // 获得上传文件的个数 { return myFiles.size(); } }
3）Action（UploadMoreAction）
package fileUpload.mutityFileUpload.action; import java.io.FileOutputStream; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.upload.FormFile; import fileUpload.mutityFileUpload.form.UploadMoreForm; public class UploadMoreAction extends Action { public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { UploadMoreForm umForm = (UploadMoreForm) form; int count = 0; try { count = umForm.getFileCount(); // 获得上传文件的总数 for (int i = 0; i < count; i++) { FormFile file = umForm.getFile(i); System.out.println(file.getFileName()); FileOutputStream fos = new FileOutputStream("d:\\" + file.getFileName()); //创建输出流 fos.write(file.getFileData()); //写入 fos.flush();//释放 fos.close(); //关闭 } } catch (Exception e) { e.printStackTrace(); } return null; } }
4）Struts配置文件（struts-config.xml）
<!-- 配置 多个上传 --> <form-bean name="uploadMoreForm" type="fileUpload.mutityFileUpload.form.UploadMoreForm" /> <!-- 配置 多个上传 --> <action path="/multiUpload" type="fileUpload.mutityFileUpload.action.UploadMoreAction" name="uploadMoreForm" scope="request"> <forward name="success" path="/mutityFileUpload.jsp" /> </action> <!-- 配置文件上传大小 --> <!-- 规定了最大上传大小是2M，如果设置成-1则大小无限制了 --> <controller maxFileSize="-1" />
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