Advanced features and expansion skills in the JXLS framework

The JXLS framework is a popular Java open source Excel processing framework, which provides many powerful functions in processing Excel files.In addition to basic operations, JXLS also provides some advanced features and expansion skills to help developers better use the framework. 1. Custom function and formula The JXLS framework provides the function of custom functions and formulas, which can use the custom calculation function or formula in Excel as needed.First of all, we need to create a class to implement the logic of custom functions or formulas, and then register and define these functions or formulas by implementing the JXLSABSTRACTFUNCTION class or JXLSABSTRACTEXPRESSION interface.The following is an example: public class MyCustomFunction extends JxlsAbstractFunction { public Object evaluate(Object[] args, Context context) { // The logical code of the custom function return result; } } Then use a custom function in the template: =MYFUNCTION(A1, B1) 2. Condition formatting The JXLS framework also supports the formatting function of the condition, which can be dynamically formatted on the data in Excel according to certain conditions.Using the condition formatting of JXLS, we can set font style, background color, border style, etc. according to specific needs.The following is an example: jx:each(items="data" var="item") jx:if(condition="item.amount > 1000") jx:cell(lastCell="D${item.rowNum + 1}", style="highlight") jx:end jx:end In the template, we can set a style called Highlight to set the cell style according to whether the Amount property of the data item is greater than 1000.In this way, when the Amount of the data item is greater than 1000, the corresponding cells will be formatted using the Highlight style. 3. Export chart The advanced feature of another JXLS framework is to support the export chart to the Excel file.You can use the method provided by the JXLSHELPER class to create and set the chart, and then export it to the Excel file.The following is an example: jx:chart(chartType="bar", dataRange="Sheet1!$A$1:$B$5", startCell="E1") In the above example, we define a column diagram in the template with the data range of A1: B5 in Sheet1, and the chart will be displayed from the E1 cell. Summarize: Through the advanced characteristics and extension skills of the JXLS framework, we can realize functions such as custom functions and formulas, conditional formatting, and export charts.These functions can help us handle Excel files more flexibly to meet different needs.If you are developing a Java application that requires the Excel file, you may wish to consider using the JXLS framework and try these advanced features and extension skills. The above is a Chinese knowledge article about the advanced characteristics and expansion skills in the JXLS framework. I hope it will be helpful to you.If necessary, you can refer to the above Java code examples to practice related functions.