Saurabh Gour Saurabh Gour - 7 months ago 221
Java Question

Java code working fine when created as an independent static main class, but not when called from servlet

I am using Tess4j API for performing OCR and have created a dynamic web project in eclipse. If I create a new java class directly under the Java resources folder, the code is working fine.


public static void main(String[] args){
File image = new File("Scan0008.jpg");
ITesseract instance = new Tesseract();
try{
String result = instance.doOCR(image);
System.out.println(result);
}catch(TesseractException e){
System.err.println(e.getMessage());
}
}


However I am getting an exception when I am calling the same code from my Servlets doPost method.


protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Validate valObj = new Validate();
valObj.validate();
}
public void validate() {
File image = new File("Scan0008.jpg");
ITesseract instance = new Tesseract();
try {
String result = instance.doOCR(image);
System.out.println(result);
} catch (TesseractException e) {
System.err.println(e.getMessage());
}
}


I have included all the required jars under lib folder of WEB-INF. Have also added the jars in the projects build path. Could anyone please let me know what I am doing wrong.

Exception :

java.lang.IllegalStateException: Input not set

23:33:45.002 [http-bio-8080-exec-5] ERROR net.sourceforge.tess4j.Tesseract - Input not set

java.lang.IllegalStateException: Input not set

Answer

I think your current directory is different when you are calling from servlet. the current directory is you tomcat bin folder. so when you are calling like this:

File image = new File("Scan0008.jpg");

your scan0008.jpg must be put in bin folder of tomcat or you must use absolute path of your file.

Comments