struts2 文件存储到数据库

[ruiqinzhen]

我的主要问题是struts2文件已经可以上传到服务器端的 一个文件夹中了，但是我现在要把文件存到数据库中，数据库中是用byte[]数组来存储的，而拿过来的文件是struts2的File类型，请问有谁知道怎么把struts2的File类型转化成byte[]数组，存储到数据库中呢 。。谢了

[jack_liu4Ye]

我用的是commons-fileupload-1.2.1.jar插件

public void FileUpload(HttpServletRequest request, HttpServletResponse response, String uuid)
			throws Exception {
		Connection conn = null;
		InitialContext ctx = new InitialContext();
		DataSource ds = (DataSource) ctx.lookup(ConstantFactory.getConstant("HSRDB"));
		conn = ds.getConnection();
		try {
			FileItemFactory factory = new DiskFileItemFactory();
			ServletFileUpload upload = new ServletFileUpload(factory);
			upload.setHeaderEncoding("utf-8");
			List items = upload.parseRequest(request);
			Iterator iter = items.iterator();
			FileItem item = null;
			while (iter.hasNext()) {
				item = (FileItem) iter.next();
				if (!item.isFormField()) {
					AttachmentInfo attachmentInfo = new AttachmentInfo();
					String fileName = item.getName();
					String shortFileName = fileName.substring(fileName.lastIndexOf("\\") + 1);
					attachmentInfo.setFileName(shortFileName);
					attachmentInfo.setBizDataUuid(uuid);
					InputStream stream = item.getInputStream();
					byte[] bytes = new byte[1024 * 1024];
					int leng = stream.read(bytes);
					if (leng != -1) {
						byte[] bytes1 = new byte[leng];
						for (int i = 0; i < leng; i++) {
							bytes1[i] = bytes[i];
						}
						CommonMethod.createInstance(attachmentInfo);
						PreparedStatement pstmt = conn
								.prepareStatement("UPDATE AttachmentInfo SET imgData = ? where AttachmentInfo.uuid = '"
										+ attachmentInfo.getUuid() + "'");
						pstmt.setBytes(1, bytes1);
						pstmt.executeUpdate();
						if (pstmt != null) {
							pstmt.close();
						}
					}
				}
			}
		}
		catch (Exception e) {
			System.out.println(e.getStackTrace());
		}
		finally {
			if (conn != null) {
				conn.close();
			}
		}
	}

[hq1305018]

Struts的File,有一个getInputStream()方法,可以读取文件中的字节.
循环读取全部字节保存到数组中就可以了.

[ruiqinzhen]

好，谢谢了。 我试试看

[zhiichen]

说有getInputStream()方法的，你说的是FormFile，属于struts1
人家都说了struts2了，File没有getInputStream()方法

[zhiichen]

File --> InputStream
InputStream in = new InputStream(new FileInputStream(File));

InputStream --> File
public void inputstreamtofile(InputStream ins,File file){
OutputStream os = new FileOutputStream(file);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {
os.write(buffer, 0, bytesRead);
}
os.close();
ins.close();
}