Struts2文件上传的相关笔记

最新推荐文章于 2024-06-29 22:48:48 发布

Jeremy27

最新推荐文章于 2024-06-29 22:48:48 发布

阅读量126

点赞数

本文链接：https://blog.youkuaiyun.com/Kuzma_/article/details/100576215

版权

本文详细介绍使用Struts2框架实现文件上传的过程，包括创建jsp页面、定义UploadAction类及配置struts.xml，同时强调了multipart/form-data的重要性及文件上传的具体实现。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

最近在自学struts2，记录一下学习过程

首先大概描述一下上传步骤吧：

1.首先需新建一个upload.jsp

2.新建一个UploadAction类用来处理文件上传

3.配置struts.xml

upload.jsp的主要代码如下：

<s:form action="uploadAction" enctype="multipart/form-data">
<s:file name="upload" label="请选择文件"></s:file>
<s:submit value="上传"></s:submit>
</s:form>

特别需要注意的是enctype必须设置为multipart/form-data

UploadAction的主要代码如下：

public class UploadAction extends ActionSupport{

   private File upload;
   private String uploadFileName;
   private String uploadFileContentType;
   private String savePath;

   public File getUpload() {
       return upload;
   }
   public void setUpload(File upload) {
       this.upload = upload;
   }
   public String getUploadFileContentType() {
       return uploadFileContentType;
   }
   public void setUploadFileContentType(String uploadFileContentType) {
       this.uploadFileContentType = uploadFileContentType;
   }
   public String getUploadFileName() {
       return uploadFileName;
   }
   public void setUploadFileName(String uploadFileName) {
       this.uploadFileName = uploadFileName;
   }
   public String getSavePath() {
       return savePath;
   }
   public void setSavePath(String savePath) {
       this.savePath = savePath;
   }
   @Override
   public String execute() throws Exception {

       String realPath = ServletActionContext.getServletContext().getRealPath(getSavePath());

       System.out.println("realPath: " + realPath);
       System.out.println("uploadFileName: " + getUploadFileName());

       File file = new File(realPath);
       if(!file.exists()) {
           file.mkdir();
       }

       FileUtils.copyFile(getUpload(), new File(file, getUploadFileName()));;

       return SUCCESS;
   }


}
upload表示上传的文件

uploadFileName:文件名

uploadContentType:文件类型

此处要注意这三个变量的命名规则，若不符合规则，uploadFileName和uploadContentType可能取不到值

struts.xml主要代码如下：

<action name="uploadAction" class="com.ccnu.action.UploadAction">

           <interceptor-ref name="fileUpload">
               <param name="allowedTypes">
                   image/jpeg
               </param>
               <param name="maximumSize">20000</param>
           </interceptor-ref>

           <interceptor-ref name="defaultStack"></interceptor-ref>

           <param name="savePath">/upload</param>
           <result>/WEB-INF/content/uploadSucc.jsp</result>
           <result name="input">/upload.jsp</result>
       </action>

注意：别忘了配置savePath属性