struts2文件下载及文件上传

最新推荐文章于 2022-07-15 08:29:20 发布

最新推荐文章于 2022-07-15 08:29:20 发布 · 98 阅读

文章标签：

#Struts #Web #XML

JavaEE 专栏收录该内容

3 篇文章

订阅专栏

本文介绍如何使用Struts2框架实现文件的上传和下载功能。具体包括配置struts.xml文件以支持文件操作，通过Java代码实现文件的读取、写入及流的控制，确保文件能够正确地上传到服务器并可供用户下载。

一、文件下载

struts.xml配置代码

	public String download() throws Exception {	
		response = ServletActionContext.getResponse();
		response.setContentType("application/x-msdownload");
		response.setHeader("Content-Disposition","attachment;filename=customers.xls"); 
	    OutputStream out = null; 
	    FileInputStream in = null; 
	    try { 
	    	String path = "/WEB-INF/classes/template/customers.xls";
	    	out  = ServletActionContext.getResponse().getOutputStream(); 
	        in = new FileInputStream(ServletActionContext.getServletContext().getRealPath(path)); 
	       
	        byte[] buf = new byte[4096]; 
	        int i = 0; 
	        while((i = in.read(buf)) > 0) { 
	        	out.write(buf, 0, i); 
	        } 
	        out.flush(); 
	    } 
	    catch(Exception e) { 
	       e.printStackTrace();
	    } 
	    finally { 	
	    	if(in != null) {
	    		in.close(); 
	    	}
	    	if(out != null) {
	    		out.close();
	    	}	         	        
	    } 
		return null;
	}

二、文件上传


    private File doc;   
    private String fileName;   
    private String contentType;
    public void setDoc(File file) {   
        this.doc = file;   
    }   
       
    public void setDocFileName(String fileName) {   
        this.fileName = fileName;   
    }   
       
    public void setDocContentType(String contentType) {   
        this.contentType = contentType;   
    }

	public String upload() throws Exception {	
		String dir = ServletActionContext.getServletContext().getRealPath("/temp");   
        if(!new File(dir).exists()) {
        	new File(dir).mkdirs();
        }        	
        File target = new File(dir, "customers.xls");              
        FileUtils.copyFile(doc, target);
		return SUCCESS;
	}

//在页面中加入
<file name="doc" size="60" cssclass="t_input"></file>