我有一个程序,其中客户端上传文件并将文件存储在数据库中。在我的计算机上更新 Java 之前,我的项目运行良好。现在我得到一个FileNotFoundException
. Eclipse 告诉我:
JAR 文件 C:\Program Files\Java\jre7\lib\rt.jar 没有源附件。
有人遇到过这个问题吗?
我上传文件的 servlet 代码是标准的:
if (!ServletFileUpload.isMultipartContent(request))
{return;}
try
{
List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
courseID = items.get(0).getString();
homeworkID = items.get(1).getString();
File storeFile = new File(items.get(2).getName());
String fileName = storeFile.getName();
String mimeType = new MimetypesFileTypeMap().getContentType(storeFile); //for putting file into database
putFileIntoDB(uName, courseID, homeworkID, fileName, mimeType, storeFile);
}//try
catch (Exception ex)
{
request.setAttribute("msg", "There was an error: " + ex.getMessage());
request.getRequestDispatcher("/upload.jsp").forward(request, response);
}
在 fis=new FileInputStream(f) 行创建 FileInputStream 时 putFileIntoDB 方法出现错误:
void putFileIntoDB(String username, String courseID, String homeworkID, String fileName, String mime, File f) throws SQLException, IOException
{
FileInputStream fis = null;
java.sql.PreparedStatement pstmt = null;
java.sql.Connection conn = null;
try {
conn = ConnectionManager.getConnection();
conn.setAutoCommit(true);
fis = new FileInputStream(f);
pstmt = conn.prepareStatement("insert into files(username, courseID, assignmentID, fileName, mimeType, contents) values (?, ?, ?, ?, ?, ?)");
pstmt.setString(1, username);
pstmt.setString(2, courseID);
pstmt.setString(3, homeworkID);
pstmt.setString(4, fileName);
pstmt.setString(5, mime);
pstmt.setAsciiStream(6, fis, (int) f.length());
pstmt.executeUpdate();
conn.commit();
}
catch (Exception e)
{
System.err.println("Error: " + e.getMessage());
e.printStackTrace();
}
finally
{
pstmt.close();
fis.close();
conn.close();
}
}
还有其他人遇到这个问题吗?