一：上传文件的主页面 upload.jsp
注意: <input type="file" name="upload">
<form enctype="multipart/form-data">//二进制转换
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <%@ taglib prefix="s" uri="/struts-tags" %> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>上传文件主页面</title> 9 </head> 10 <body> 11 <s:fielderror/> 12 <form action="uploadAction" method="post" enctype="multipart/form-data"> 13 <table border="1"> 14 <caption>上传文件</caption> 15 <tr> 16 <th>上传标题</th> 17 <td><input type="text" name="title"></td> 18 </tr> 19 <tr> 20 <th>选择文件</th> 21 <td><input type="file" name="upload"></td> 22 </tr> 23 <tr> 24 <td colspan="2" align="center"><input type="submit" value="上传"></td> 25 </tr> 26 </table> 27 </form> 28 </body> 29 </html>
二：跳转到相应的action nuc.sw.action---uploadAction.java
1 package nuc.sw.action; 2 3 import java.io.File; 4 import java.io.FileInputStream; 5 import java.io.FileOutputStream; 6 import java.util.UUID; 7 8 import com.opensymphony.xwork2.ActionSupport; 9 10 public class uploadAction extends ActionSupport { 11 private String title;//自定义标题 12 private File upload; //上传主页面的file名 13 private String uploadFileName;//实现file的相关联的三个属性 14 private String uploadContentType; 15 private String savePath; 16 public String getTitle() { 17 return title; 18 } 19 public void setTitle(String title) { 20 this.title = title; 21 } 22 public File getUpload() { 23 return upload; 24 } 25 public void setUpload(File upload) { 26 this.upload = upload; 27 } 28 public String getUploadFileName() { 29 return uploadFileName; 30 } 31 public void setUploadFileName(String uploadFileName) { 32 this.uploadFileName = uploadFileName; 33 } 34 public String getUploadContentType() { 35 return uploadContentType; 36 } 37 public void setUploadContentType(String uploadContentType) { 38 this.uploadContentType = uploadContentType; 39 } 40 public String getSavePath() { 41 return savePath; 42 } 43 public void setSavePath(String savePath) { 44 this.savePath = savePath; 45 } 46 47 @Override 48 public String execute() throws Exception {
//输出5个值，得到相应的理解 49 System.out.println(title); 50 System.out.println(upload); //临时文件：.tmp 51 System.out.println(uploadFileName); 52 System.out.println(uploadContentType);//文件本质 MIME类型 如：.txt=text/plain 53 System.out.println(savePath); 54 //输入流 55 FileInputStream fis=new FileInputStream(upload); 56 //输出流 57 //上传两次一样的都会成功且显示两个，所以解决覆盖问题 58 FileOutputStream fos=new FileOutputStream(savePath+"/"+UUID.randomUUID().toString()+"_"+uploadFileName); 59 //字节为单位上传 60 byte[] buffer=new byte[1024]; 61 //定义长度 62 int len=0; 63 //从0开始 64 while((len=fis.read(buffer))>0){ 65 fos.write(buffer, 0, len); 66 } 67 //不能写输入输出流 68 return SUCCESS; 69 } 70 }
三：配置struts.xml
1: 对文件的类型 大小进行限制（实现文件过滤）
2：设置上传的文件的真实路径 即将.tmp文件保存到savepath文件中
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 <constant name="struts.devMode" value="true" /> 8 <!-- 设置文件的临时保存路径 --> 9 <constant name="struts.multipart.saveDir" value="d:/tmpsaveDir"></constant> 10 <package name="default" namespace="/" extends="struts-default"> 11 <action name="uploadAction" class="nuc.sw.action.uploadAction"> 12 <!-- 需要去找源码：struts-default.xml中寻找拦截器 再关联源码 --> 13 <interceptor-ref name="fileUpload"> 14 <!--设置上传的文件类型 --> 15 <!-- 隐藏这一属性后，黑客可以随意上传修改后缀名的病毒文件 （实质没有改变）--> 16 <param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg,image/phpeg,text/plain</param> 17 <!-- 设置上传的文件的大小 --> 18 <param name="maximumSize">65535</param> 19 <!-- 设置上传文件的扩展名 --> 20 <param name="allowedExtensions">.txt</param> 21 </interceptor-ref> 22 <!-- 引用默认拦截器时，需要使用defaultStack --> 23 <interceptor-ref name="defaultStack"/> 24 <!-- 设置保存的真实路径 --> 25 <param name="savePath">d:/uploadRealFile</param> 26 <result name="success">/hello.jsp</result> 27 <result name="input">/upload.jsp</result> 28 </action> 29 </package> 30 </struts>
四：项目结构
五：运行结果
