002——struts的文件上传功能

来源：互联网发布：怎么设置软件锁编辑：程序博客网时间：2024/06/13 18:55

界面：

<span style="font-size:18px;">  <body><h2>使用Struts上传文件的功能</h2><form action="struts_fileupload.do" method="post" enctype="multipart/form-data"><table><tr><td>请选择要上传的文件</td><td><input type="file" name="filePath" size="50"></td></tr><tr><td colspan="2" align="center"><input type="submit" value="上传"></td></tr></table></form>  </body></span>

配置文件：

<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd"><struts-config><form-beans><form-bean name="fileUploadForm" type="com.java.struts.actionForm.FileUploadActionForm" /></form-beans>  <global-exceptions />  <global-forwards /><action-mappings><action path="/struts_fileupload"name="fileUploadForm"type="com.java.struts.action.FileUploadAction"scope="request"><forward name="success" path="/success.jsp"></forward></action></action-mappings>  <message-resources parameter="ApplicationResources" /></struts-config></span>

逻辑处理类：

<span style="font-size:18px;">package com.java.struts.action;import java.io.BufferedOutputStream;import java.io.FileOutputStream;import java.io.InputStream;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 com.java.struts.actionForm.FileUploadActionForm;public class FileUploadAction extends Action {public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response)throws Exception {FileUploadActionForm myForm = (FileUploadActionForm) form;FormFile fileObj = myForm.getFilePath();//得到存放上传文件的目录的真实路径String dir = this.getServlet().getServletContext().getRealPath("/upload");//如果没有选择文件if(fileObj==null) {return mapping.findForward("success");}//获得上传的文件名String fileName = fileObj.getFileName();//获得上传的文件大小int size = fileObj.getFileSize();if(size > 1024 * 1024) {return mapping.findForward("success");}//从上传文件中得到一个输入流...之后就可以进行相应操作了InputStream is = fileObj.getInputStream();BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(dir + "/" + fileName));byte[] buffer = new byte[20480];int count = 0;while((count = is.read(buffer)) != -1) {bos.write(buffer, 0, count);}bos.flush();bos.close();is.close();return mapping.findForward("success");}}</span>

actionform：

<span style="font-size:18px;">package com.java.struts.actionForm;import org.apache.struts.action.ActionForm;import org.apache.struts.upload.FormFile;public class FileUploadActionForm extends ActionForm {//文件上传输入域在ActionForm中必须定义为FormFile类型private FormFile filePath;public FormFile getFilePath() {return filePath;}public void setFilePath(FormFile filePath) {this.filePath = filePath;}}</span>

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