[html]
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<title>文件上传</title>
</head>
<body>
<s:form name="idFrmMain" method="post" enctype="multipart/form-data">
<table style="margin-left: 100px;" border=0 cellspacing=0 cellpadding=2 bordercolor="#FFFFFF" width="400">
<col span=1 width="3600">
<tr>
<th>上传文件</th>
<td>
<s:file name="file" size="40" onkeypress="return false;" />
</td>
</tr>
<tr align="center">
<td>
<input type="button" style="width: 80px; height: 25" value="上传" onclick="javascript:upload();">
</td>
</tr>
</table>
</s:form>
</body>
</html>
文件为file，文件名必须为file+FileName（即fileFileName）,只有这样才能通过get和set方法自动获取到文件名。该文件名不包括文件的路径
表单中必须加enctype="multipart/form-data"，它用来设置表单的MIME编码。默认情况，编码格式是application/x-www-form-urlencoded，不能用于文件上传；
只有使用了multipart/form-data，才能完整的传递文件数据.enctype="multipart/form-data"是上传二进制数据。
[java]
/** 文件 */
private File file;
/** 文件名 */
private String fileFileName;
public File getFile() {
return file;
}
public void setFile(File file) {
this.file = file;
}
public String getFileFileName() {
return fileFileName;
}
public void setFileFileName(String fileFileName) {
this.fileFileName = fileFileName;
}
String fileName = this.getFileFileName();
File fileObj = this.getFile();
String uploadPath = ServletActionContext.getServletContext().getRealPath("upload");//上传服务器路径
uploadFile(uploadPath, fileName, FileIO.read(fileObj));//调用uploadFile()方法
[java]
public static void uploadFile(String path, String fileName,
StringBuffer buffer) throws Exception {
File file = new File(path);
if (!file.exists()) {
file.mkdirs();
}
String fullFileName = path + File.separatorChar + fileName;
BufferedWriter bw = null;
try {
bw = getBufferedWriter(fullFileName, false);
bw.write(buffer.toString());
bw.flush();
} catch (FileNotFoundException e) {
throw new FwApplicationException("文件不存在");
} finally {
if (bw != null) {
bw.close();
}
}
}
[java]
public static BufferedWriter getBufferedWriter(String fileName,
boolean writeMode) throws Exception {
FileOutputStream fos = null;
OutputStreamWriter osw = null;
try {
fos = new FileOutputStream(fileName, writeMode);
osw = new OutputStreamWriter(fos, "ISO8859-1");
return new BufferedWriter(osw);
} catch (Exception e) {
try {
if (osw != null) {
osw.close();
} else if (fos != null) {
fos.close();
}
} catch (IOException ioException) {
LOG.debug("关闭时发生异常", ioException);
}
throw e;
}
}
调用js里的upload()函数
[javascript]
function upload() {
document.idFrmMain.action = "fileUpload.do";
document.idFrmMain.target = "_self";
document.idFrmMain.submit();
}
