strut2下载文件

strut2下载文件

public String downFruit(){
	Map<String, String> map = iProductServ.downFruitPath(fruitid);
	HttpServletResponse resp = ServletActionContext.getResponse();  
        OutputStream out;//输出响应正文的输出流  
        InputStream in;//读取本地文件的输入流  
        //获得本地输入流
        File file = new File(map.get("fruitPath")); //下载文件路径
        try {
		in = new FileInputStream(file);
	        //设置响应正文的MIME类型  
	        resp.setContentType("application/octet-stream;charset=utf-8");  //二进制流下载，可下载任意类型文件
	        resp.setHeader("Content-Disposition", "attachment;"   + " filename="+ new String(map.get("fruitName").getBytes(), "ISO8859-1")); //下载we的文件名 
	        //把本地文件发送给客户端  
	        out = resp.getOutputStream();  
	        int byteRead = 0;  
	        byte[] buffer = new byte[512];  
	        while((byteRead = in.read(buffer)) != -1) {  
	        	out.write(buffer, 0, byteRead);  
	        }  
	        in.close();  
	        out.close();
        } catch (Exception e) {
		logger.error(e.getMessage(),e);
	}
	return null;//返回null
}