String fileToReadBlob = "d:left_zh.gif";
File f = new File(fileToReadBlob);
int lengthofFile = (int) f.length();
FileInputStream fileInputStream = new FileInputStream(f);
PreparedStatement pstmt=conn.prepareStatement(sql);
pstmt.setInt(1,3);
pstmt.setBinaryStream(2, fileInputStream, lengthofFile);
pstmt.executeUpdate();
出现这样的错误：
[10/Sep/2002:11:41:09] failure (16112): Internal error: exception thrown from the servlet service function (uri=/jsp/student/forum/testClob.jsp): java.io.FileNotFoundException: d:/left_zh.gif (No such file or directory), Stack: java.io.FileNotFoundException: d:/left_zh.gif (No such file or directory) 
at java.io.FileInputStream.open(Native Method) 
at java.io.FileInputStream.(FileInputStream.java, Compiled Code) 
at java.io.FileInputStream.(FileInputStream.java, Compiled Code) 
at _jsps._jsp._student._forum._testClob_jsp._jspService(_testClob_jsp.java, Compiled Code) 
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java, Compiled Code) 
at javax.servlet.http.HttpServlet.service(HttpServlet.java, Compiled Code) 
at com.iplanet.server.http.servlet.NSServletRunner.invokeServletService(NSServletRunner.java, Compiled Code) 
at com.iplanet.server.http.servlet.NSServletRunner.Service(NSServletRunner.java, Compiled Code) 
 

try:

String fileToReadBlob = "d:\left_zh.gif";
java.io.File f = new java.io.File(fileToReadBlob);
if (f.exists()){
int lengthofFile = (int) f.length();
FileInputStream fileInputStream = new FileInputStream(f);
PreparedStatement pstmt=conn.prepareStatement(sql);
pstmt.setInt(1,3);
pstmt.setBinaryStream(2, fileInputStream, lengthofFile);
pstmt.executeUpdate();
}else{
   out.println(fileToReadBlob+" is not exists!") ;
}