OutputStreamAction

/*struts action 注解 输出文件流的方法*/
@Result
(name="success",value="inputStream",type=StreamResult.class,
params={"bufferSize",FileConstant.DOWNLOAD_BUFFER_SIZE})

@Result
(name = "search",value= "search",type=ActionChainResult.class,
params={"method","search"})


@Results({
@Result(name="input" value="/input.jsp" type=NullResult.class),
@Reuslt(name="success" value="/success.jsp" type=NullResult.class),
@Result(name="error" value="/error.jsp" type=NullResult.class)
})



/**
contentType 指定下载文件的文件类型 —— application/octet-stream表示无限制

inputName 流对象名 ——比如这里写inputStream，它就会自动去找Action中的getInputStream方法。

contentDisposition 使用经过转码的文件名作为下载文件名 ——默认格式是attachment;filename="${fileName}"，将调用该Action中的getFileName方法。

bufferSize 下载文件的缓冲大小


@Results({@Result(name = "download", type = "stream", params = {  
        "contentType", "application/octet-stream",  
        "inputName", "inputStream", "contentDisposition",  
        "attachment;filename=\"${downloadFileName}\"", "bufferSize",  
        "4096" })})  
        
*/
	@Action(value="toPrintPDFSend",results={
			@Result(name="success",type="stream",
					params={"bufferSize","4096",
							"inputName","inputStream",
							"contentType","application/octet-stream",
							"contentDisposition","attachment;filename=test1.pdf"})
			})
	public String downloadFile(){
	  return SUCCESS;
	}
	
	/**
	getInputStream()方法对应 "inputName","inputStream" 
	*/
	public InputStream getInputStream() throws Exception{
		return new FileInputStream("e:/temp/test_1465896696935.pdf");
	}
	
 public String getDownloadFileName() {  
        return fileName;  
    }