Learning itext for the first time, I find that positioning and layout is a painful process. Could you please tell me how to implement precise positioning and layout? Currently, items in the same line are misaligned: some are left-aligned while others are right-aligned. Additionally, I'm encountering errors such as `ORA-01830: Date format picture ends before converting the entire input string` and `java.lang.ClassNotFoundException: loadFileURL`. In HTML, we can use CSS for styling and alignment—how can this be achieved using itext? Please provide guidance. Should I resort to assembling layouts using tables instead?
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You may refer to the following:
**How to set the size when generating a PDF with IText:**
http://www.myexception.cn/java-web/183112.html
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### Key Points:
1. **Positioning and Layout in iText**:
- Use `PdfPTable` or `ColumnText` for precise control over positioning.
- Define cell alignments (left, center, right) using `setHorizontalAlignment()` for table cells.
- For absolute positioning, use `ColumnText` with specific coordinates.
2. **Error Handling**:
- `ORA-01830`: This is an Oracle database error indicating an issue with date formatting. Ensure your date strings match the expected format.
- `ClassNotFoundException`: Verify that all required libraries (e.g., itext.jar) are correctly added to your project's classpath.
3. **CSS-like Styling in iText**:
- While iText does not natively support CSS, you can mimic CSS behavior by programmatically setting font styles, sizes, colors, and alignments.
If you need further clarification or examples, feel free to ask!