Light Excel Reader framework abnormal processing and error debugging

Light Excel Reader (LER) is a Java framework for parsing and reading Excel files.It provides a simple and efficient way to handle Excel files, including table data, charts and formulas.However, when using LER, we may encounter some abnormal conditions and errors, so proper abnormal processing and error debugging methods need to be used. 1. Abnormal treatment: When using LER to analyze the Excel file, various abnormalities may be encountered, such as incorrect file formats, file damage or inability to access.In order to avoid procedure collapse or error results, we should use proper abnormal processing mechanisms.The following is an example code that demonstrates how to deal with Ler's abnormalities: try { // Use LER to read the excel file LightWorkbook workbook = LightReader.readExcel("path/to/excel.xlsx"); // Operate Excel data // ... } catch (LightReaderException e) { // Treat the abnormal situation of LER System.out.println ("Error occurs when reading the excel file:" + e.getMessage ()); } catch (Exception e) { // Treatment of other types of abnormalities System.out.println ("The program error occurs:" + e.getMessage ()); } In the above code, we use the Try-Catch statement block to capture the abnormalities that LER may throw.The first Catch block is used to capture LightReadrexception, which is a specific type of abnormal type defined in the LER library.The second CATCH block is used to deal with other types of abnormalities to ensure the robustness of the program. 2. Error debugging: When we encounter problems when using LER, we need to make an error debug to find out the problem.Here are some common wrong debugging methods: a. Use the log recorder: We can use the Java log recorder (such as log4j, java.util.logging, SLF4J, etc.) to record the detailed information during the program execution, including LER's calling and returning results.This can help us track and analyze problems. b. Print and debug statement: In the process of executing LER, you can insert the print statement in a critical position to output the variable value or execution status to better understand the process of the program.For example: System.out.println ("current row number:" + row.getRownumber ()); System.out.println ("Current unit grid value:" + cell.getvalue ()); c. Use breakpoint debugging: In the development environment, we can use the breakpoint debugging function to gradually execute the program and view the value of each variable.This is a very effective debugging method that can in -depth understanding of the internal operation of the program. Through reasonable abnormal processing and error debugging methods, we can better use the Light Excel Reader framework and quickly solve the problems that may be encountered when reading and analyzing Excel files.This will improve our development efficiency and code quality, so as to better meet business needs.