Struts2单文件上传

1.引入jar包

我们需要格外引入2和commons的jar

     commons-fileupload
     commons-fileupload
     1.3.1



     commons-io
     commons-io
     1.4

2.Action类：

private String uploadContentType;
    private String uploadFileName;

 

这2个属性名  必须要以ContentType   和  FileName  结尾

 package cn.happy.struts09file;

 import com.opensymphony.xwork2.Action;
 import org.apache.struts2.ServletActionContext;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;

 /**
  * Created by linlin on 2017/10/30.
  */
 public class FileAction implements Action{

     private File upload;
     private String uploadContentType;
     private String uploadFileName;
     private String savePath;
     public String execute() throws Exception {
         byte[] buffer=new byte[1024];
         FileInputStream fis=new FileInputStream(getUpload());
         FileOutputStream fos=new FileOutputStream(getSavePath()+"\\"+getUploadFileName());
         int length=fis.read(buffer);
         while (length>0){
             fos.write(buffer,0,length);
             length=fis.read(buffer);
         }
         fos.flush();
         fos.close();
         fis.close();
         return SUCCESS;
     }

     public File getUpload() {
         return upload;
     }

     public void setUpload(File upload) {
         this.upload = upload;
     }

     public String getUploadContentType() {
         return uploadContentType;
     }

     public void setUploadContentType(String uploadContentType) {
         this.uploadContentType = uploadContentType;
     }

     public String getUploadFileName() {
         return uploadFileName;
     }

     public void setUploadFileName(String uploadFileName) {
         this.uploadFileName = uploadFileName;
     }

     public String getSavePath() {
         return ServletActionContext.getServletContext().getRealPath(savePath);
     }

     public void setSavePath(String savePath) {
         this.savePath = savePath;
     }
 }

3.struts.xml

 "1.0" encoding="UTF-8"?>

         "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
         "http://struts.apache.org/dtds/struts-2.0.dtd">




     <package name="day-09" namespace="" extends="struts-default">

         "uploadAction" class="cn.happy.struts09file.FileAction">
           "savePath">/upload
             "success">/file/strutsupload.jsp


     package>

4.页面：

 <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
 <%@ taglib prefix="s" uri="/struts-tags" %>


     Struts2文件上传


 "uploadAction" enctype="multipart/form-data" method="post">
     "upload" label="选择文件"/>
     "submit" value="文件上传"/>

2.

 <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
 <%@ taglib prefix="s" uri="/struts-tags" %>


     Struts2文件上传页面


 文件是: "uploadFileName">
 文件类型："uploadContentType">

web.xml

 "1.0" encoding="UTF-8"?>
 "http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">


   struts2
 class>
 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
 class>


 struts2
 /*



   contextConfigLocation
   classpath:struts.xml


   class>org.springframework.web.context.ContextLoaderListenerclass>