JXLS Reader Framework Frequently Asked Questions and Failure Exclusion

JXLS Reader Framework Frequently Asked Questions and Failure Exclusion introduce: JXLS Reader is a Java library for reading the excel file.It provides convenient methods to analyze and read data in Excel and convert it to Java objects.However, when using JXLS Reader, there are some common problems and faults that may occur.This article will introduce these common problems and provide corresponding solutions. 1. JXLS Reader cannot read the excel file If you can't use JXLS Reader to read the excel file, it may be due to the following reasons: -Excel file does not exist: Make sure the file path you provide is correct, and the file does exist under the path. -Scel files are occupied: Excel files may be occupied by other programs, causing JXLS Reader to be unable to read.Make sure the Excel file is not opened by other programs, and try to read again. The following is a sample code for reading Excel files using JXLS Reader: InputStream inputStream = New FileInputStream ("Path/File Name .xlsx"); List<Employee> employees = JxlsUtils.readExcel(inputStream, Employee.class); inputStream.close(); // Employee classes need to be defined in the code public class Employee { private String name; private int age; // Other attributes and getter/setter } 2. The type of data read is incorrect If JXLS Reader converts the data in Excel into the wrong Java data type, it may be due to the following reasons: -Exquisive format format in Excel cells: Make sure the data type in the Excel cell matches the attribute type in the Java class.For example, if the data in the Excel cell is a string, and the attributes in the Java class are an integer type, it cannot be transformed correctly. -C customized data converter: If the data type in the Excel cell is special, you can customize the data converter to deal with this problem.By implementing the Converter interface and registering a custom converter, you can convert data in Excel into the correct Java data type. The following is an example code using a custom converter: public class CustomConverter implements Converter { @Override public Object convert(Class targetType, Object sourceValue, Sheet sheet, Cell cell) { // To realize custom conversion logic here return convertedValue; } } // Register a custom converter ConverterRegister.registerConverter(DataType.STRING, new CustomConverter()); 3. JXLS Reader Chinese garbled problem If JXLS Reader encounters a Chinese garbled problem when reading the excel file, it may be due to the following reasons: -Cat code settings: Before reading the Excel file, make sure that the correct encoding is set.Especially when the Excel file contains non -Yingwen characters, it is necessary to ensure that appropriate codes need to be used. -In the correct charset when reading Excel: When reading the excel file, you can specify the use of a specific charset.By passing the charSet object to jxlsconfig.getinstance (). Setsafelystrtocharset (Charset) method, you can set the correct character set. The following is a sample code for setting the character set: Charset charset = Charset.forName("UTF-8"); JxlsConfig.getInstance().setSafelyStrToCharset(charset); Summarize: JXLS Reader is a very convenient Java library that is used to analyze and read Excel files.When you use JXLS Reader, you may encounter some common problems. If you cannot read Excel files, the data types read are incorrect and Chinese garbled.By understanding these problems and adopting the corresponding solution, you can effectively use JXLS Reader to read and process Excel data.