Struts2 file 表单上传问题

[jackey_option]

表单提交到Action后，通过 ActionContext.getContext().getParameters() 结果是：

(java.util.HashMap<K,V>) 
{bookFile=[Ljava.io.File;@e40293, 
submit=[Ljava.lang.String;@1652020, 
bookFileContentType=[Ljava.lang.String;@2023f3, 
bookId=[Ljava.lang.String;@1854be, 
bookFileFileName=[Ljava.lang.String;@163c17d}

Action类中有以下属性:

private File bookFile;
private String bookFileContentType;
private String bookFileFileName;
private String bookId; 

也有相应的setter/getter方法

@Component("bookUploadAction")
public class RBookUploadAction extends ActionSupport implements RequestAware, ServletResponseAware{
	private static final long serialVersionUID = -3430678334134919673L;
	private RequestMap request;
	private HttpServletResponse response;

	private File bookFile;
	private String bookFileContentType;
	private String bookFileFileName;

	private String bookId;
	
	@Resource(name="bookMgmtServiceImpl")
	private IRBookMgmtService iBookService;
	
	PhoenixProperties phoenixProp = PhoenixProperties.getInstance();
	
	public void setiBookService(IRBookMgmtService iBookService) {
		this.iBookService = iBookService;
	}
	
	public File getBookFile() {
		return bookFile;
	}

	public void setBookFile(File bookFile) {
		this.bookFile = bookFile;
	}

	public String getBookFileContentType() {
		return bookFileContentType;
	}

	public void setBookFileContentType(String bookFileContentType) {
		this.bookFileContentType = bookFileContentType;
	}

	public String getBookFileFileName() {
		return bookFileFileName;
	}

	public void setBookFileFileName(String bookFileFileName) {
		this.bookFileFileName = bookFileFileName;
	}

	public String getBookId() {
		return bookId;
	}

	public void setBookId(String bookId) {
		this.bookId = bookId;
	}

	public String uploadBook() throws Exception {
		
		ActionContext.getContext().getParameters();
		
		if (bookFile == null) {
			throw new Exception("上传文件出错！");
		}
		
		FileInputStream fis = null;
		FileOutputStream os = null;
		
		StringBuffer outPath = new StringBuffer();
		outPath.append(phoenixProp.getProperty("book_file_folder"));
		outPath.append(File.separator);
		
		RBook book = iBookService.findBook(bookId);
		if (book == null) {
			throw new Exception("数据库中无法找到目标书籍！");
		}
		
		outPath.append(book.getBookId());
		outPath.append(File.separator);
		outPath.append(bookFileFileName);
		
		
		File file = new File(outPath.toString());
		try {
			if (file.exists()) {
				file.delete();
			}
			fis = new FileInputStream(bookFile);
			os = new FileOutputStream(file);
			byte[] buffer = new byte[1024 * 16];
			try {
				while ((fis.read(buffer)) != -1) {
					try {
						os.write(buffer);
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			} catch (IOException e) {
				e.printStackTrace();
			}

		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} finally {
			try {
				fis.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
			try {
				os.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		return "success";
	}

	@Override
	public void setServletResponse(HttpServletResponse response) {
		// TODO Auto-generated method stub
		this.response = response;
	}

	@Override
	public void setRequest(Map<String, Object> request) {
		// TODO Auto-generated method stub
		this.request = (RequestMap) request;
	}
}

表单代码如下：

<form id="uploadBookFrm" enctype="multipart/form-data" method="POST" action="/phoenixCloud/book/uploadBook.do">
<span class="btn btn-default btn-file">
<span class="fileinput-new">选择书籍文件</span>
<span class="fileinput-exists">重新选择书籍文件</span>
<input id="bookFile" type="file" name="bookFile">
</span>
<span class="fileinput-filename">snap.sql</span>
<a class="close fileinput-exists" style="float: none" data-dismiss="fileinput" href="#">×</a>
<input type="hidden" value="1" name="bookId">
<input type="submit" value="submit" name="submit">
</form>

当Action的方法中被调用时，bookFile等属性为null，不知道什么原因？
struts.xml中配置如下:

<constant name="struts.multipart.saveDir" value="/tmp"/>
<constant name="struts.multipart.maxSize" value="104857600" />
...
<action name="uploadBook" class="bookUploadAction" method="uploadBook">
	<interceptor-ref name="fileUpload">  
		<param name="maximumSize">104857600</param>
	</interceptor-ref>
	<result name="success" type="redirect">/book/bookDire_getAll.do?bookId=${bookId}</result>
</action>

bookUploadAction是通过Spring的@Component("
bookUploadAction")指定的Action的名称。换成完全限定名称，结果也是一样的。

不知道为什么 bookFile等属性为null？？？？

[jackey_option]

找到原因： 把struts.xml中拦截器去掉就可以了