Struts2框架单文件上传

2024-03-26 15:11:58

Struts2框架单文件上传*

先引入struts的核心依赖

<!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-core -->
	<dependency>
	    <groupId>org.apache.struts</groupId>
	    <artifactId>struts2-core</artifactId>
	    <version>2.3.35</version>
	</dependency>

在web.xml中配置核心过滤器

  <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>*.action</url-pattern>
		  </filter-mapping>

在创建index.jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="uploadAction_upload.action" method="post" enctype="multipart/form-data">
		<input type="file" name="picture">
		<input type="submit" value="上传">
	</form>
</body>
</html>

注意
文件上传的时候表单的提交方式一定要是post
指定表单的提交类型 :multipart/form-data

在新建一个UploadAction的java类并继承 ActionSupp

public class UploadAction extends ActionSupport{
	
	private File picture;//jsp页面上的文件选择框的name必须要一致
	private String pictureFileName;//xxxFileName  xxx代表页面上的文件选择框的name
	HttpServletRequest request;
	
	//单文件上传的action
	public String upload() {
		//将上传的文件保存
		try {
				//获取当前项目所在服务器的路径
				request=ServletActionContext.getRequest();
				//获取项目的真实路径
				String path=request.getRealPath("/images");
				String extName=pictureFileName.substring(pictureFileName.lastIndexOf('.'));
				//给图片设置名字按时间设置以防重名
				SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmssSSSS");
				String fileName=sdf.format(new Date());		
				//通过保存文件的路径和文件名称创建文件对象
				File f=new File(path+"/"+fileName+extName);
				//使用文件帮助类的复制文件的方法
				FileUtils.copyFile(picture, f);
										
			} catch (Exception e) {
			e.printStackTrace();
			}
				return SUCCESS;
		}

		public String getPictureFileName() {
			return pictureFileName;
		}
		public void setPictureFileName(String pictureFileName) {
			this.pictureFileName = pictureFileName;
		}
		public File getPicture() {
			return picture;
		}
		public void setPicture(File picture) {
			this.picture = picture;
		}
	}

创建struts.xml文件写入约束


    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">
	
    <struts>
    	<package name="default" namespace="/" extends="struts-default">
    		<action name="uploadAction_*" class="com.lx.action.UploadAction" method="{1}">
    			<result>index.jsp</result>
    		</action>
    	</package>
    </struts>

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Struts2框架单文件上传*

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