Struts2单文件上传

最新推荐文章于 2024-04-17 16:39:21 发布

最新推荐文章于 2024-04-17 16:39:21 发布 · 394 阅读

1.引入jar包

我们需要格外引入2和commons的jar

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 <dependency>  
     <groupId>commons-fileupload</groupId>  
     <artifactId>commons-fileupload</artifactId>  
     <version>1.3.1</version>  
 </dependency>  
   
 <dependency>  
     <groupId>commons-io</groupId>  
     <artifactId>commons-io</artifactId>  
     <version>1.4</version>  
 </dependency>  

2.Action类：

private String uploadContentType;
private String uploadFileName;

这2个属性名必须要以ContentType 和 FileName 结尾

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 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

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 <?xml version="1.0" encoding="UTF-8"?>  
 <!DOCTYPE struts PUBLIC  
         "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"  
         "http://struts.apache.org/dtds/struts-2.0.dtd">  
 <struts>  
   
   
   
     <package name="day-09" namespace="" extends="struts-default">  
   
         <action name="uploadAction" class="cn.happy.struts09file.FileAction">  
           <param name="savePath">/upload</param>  
             <result name="success">/file/strutsupload.jsp</result>  
         </action>  
   
     </package>  
   
 </struts>  

4.页面：

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 <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>  
 <%@ taglib prefix="s" uri="/struts-tags" %>  
 <html>  
 <head>  
     <title>Struts2文件上传</title>  
 </head>  
 <body>  
 <s:form action="uploadAction" enctype="multipart/form-data" method="post">  
     <s:file name="upload" label="选择文件"/><br/>  
     <s:submit name="submit" value="文件上传"/>  
 </s:form>  
 </body>  
 </html>  

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 <%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>  
 <%@ taglib prefix="s" uri="/struts-tags" %>  
 <html>  
 <head>  
     <title>Struts2文件上传页面</title>  
 </head>  
 <body>  
 文件是: <s:property value="uploadFileName"></s:property><br/>  
 文件类型：<s:property value="uploadContentType"></s:property><br/>  
 </body>  
 </html>  

web.xml

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 <?xml version="1.0" encoding="UTF-8"?>  
 <web-app xmlns:xsi="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">  
   
 <filter>  
   <filter-name>struts2</filter-name>  
 <filter-class>  
 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter  
 </filter-class>  
         </filter>  
 <filter-mapping>  
 <filter-name>struts2</filter-name>  
 <url-pattern>/*</url-pattern>  
 </filter-mapping>  
   
 <context-param>  
   <param-name>contextConfigLocation</param-name>  
   <param-value>classpath:struts.xml</param-value>  
 </context-param>  
 <listener>  
   <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
 </listener>  
 </web-app>  