Struts2实现文件上传（相对路径）

老师上课讲了两种方法，一种是绝对路径，一种是相对路径。绝对路径太简单了，就不说了。在做相对路径时，忽略了在WebRoot目录下建一个upload目录了，使得一直报错

D:\Tomcat8.0\apache-tomcat-8.0.24\webapps\StrutsUpload\upload\17234475223385572074.jpg (系统找不到指定的路径。)

哎！！上课没观察细节

index.jsp代码：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>



  
    
    
  
  
  
    
    	
    	
    
  

success.jsp代码

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
    

  
  
  
    恭喜你！上传成功 

  

struts.xml

	
		
			/success.jsp
		
	
	
    

StrutsUpload.action

package org.action;

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

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport{
	private File upload;
	private String uploadFileName;

	public String getUploadFileName() {
		return uploadFileName;
	}

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

	public File getUpload() {
		return upload;
	}

	public void setUpload(File upload) {
		this.upload = upload;
	}
	public String execute() throws Exception{
		InputStream is=new FileInputStream(getUpload());
		String directory="/upload";
		String target=ServletActionContext.getServletContext().getRealPath(directory);//需要在webroot目录下创建一个upload目录
		OutputStream os=new FileOutputStream(target+"\\"+uploadFileName);
		byte buffer[]=new byte[1024];
		int cnt=0;
		while((cnt=is.read(buffer))>0){
			os.write(buffer, 0, cnt);
		}
		os.close();is.close();
		return "success";
	}

}