Struts2实现文件上传功能

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


 


 
 
 
 

/**
 * Description:Struts2简单文件上传
 * Author: Eleven
 * Date: 2018/1/24 10:39
 */
public class FileAction extends ActionSupport{

 //上传文件
 private File upload;
 //上传文件类型
 private String uploadContentType;
 //上传文件名
 private String uploadFileName;

 //文件上传允许的类型在struts.xml中使用param标签动态设置了
 private String allowTypes;

 public String page(){
 return "page";
 }

 public void upload() {

 //文件上传：
 //1.读取文件内容
 //2.将文件内容写到指定文件
 try{
  System.out.println("文件上传允许的类型="+allowTypes);
  String realPath = ServletActionContext.getServletContext().getRealPath("/upload");
  System.out.println("项目的绝对路径="+realPath);
  //创建文件保存目录
  new File(realPath).mkdir();
  File file = new File(realPath+"/"+uploadFileName);
  //文件不存在则创建
  if(!file.exists()){
  file.createNewFile();
  }
  FileOutputStream out = new FileOutputStream(file);
  FileInputStream in = new FileInputStream(upload);
  byte[] buffer = new byte[1024];
  int len = 0;
  //边读边写 每次读取1kb 写1kb
  while((len = in.read(buffer))>0){
  out.write(buffer,0,len);
  }
  System.out.println("文件上传成功...");
 }catch(Exception e){
  e.printStackTrace();
 }

 }

 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 getAllowTypes() {
 return allowTypes;
 }

 public void setAllowTypes(String allowTypes) {
 this.allowTypes = allowTypes;
 }
}

<&＃63;xml version="1.0" encoding="UTF-8" &＃63;>



 
 

 

 
 
  /WEB-INF/jsp/fileUpload.jsp
  
  image/png,image/gif,image/jpeg
 

 

<&＃63;xml version="1.0" encoding="UTF-8" &＃63;>



 
 

 

 
 
  
  
  
  image/png,image/gif,image/jpeg
  
  2000
  
  
  
  
  /WEB-INF/jsp/input.jsp

  /WEB-INF/jsp/fileUpload.jsp