EasyExcel framework high -level function

EasyExcel is a powerful Java framework that is used to handle the read and write operation of the Excel file.In addition to basic functions, EasyExcel also provides many advanced features to make the processing of Excel files more flexible and convenient.This article will introduce the advanced features of the EasyExcel framework in detail and provide the corresponding Java code example. 1. Style settings EasyExcel supports style settings for cells in the excel file, including fonts, background color, border, etc.By setting the style, the generated Excel files can be more beautiful and easy to read. The following is a sample code for setting the cell style: // Create an excelwriter object ExcelWriter writer = EasyExcel.write("output.xlsx").build(); // Create a sheet object Sheet sheet = new Sheet(0, 0); // Create the header style CellStyle headStyle = writer.createCellStyle(); headStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex()); headStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND); // Set font Font font = writer.createFont(); font.setBold(true); headStyle.setFont(font); // Add the header to the sheet List <strong> headers = arrays.aslist ("name", "age", "gender"); sheet.setHead(Collections.singletonList(headers)).setHeadStyle(headStyle); // data input List<List<Object>> data = new ArrayList<>(); data.add (Arrays.aslist ("Zhang San", 20, "Male"); data.add (Arrays.aslist ("Li Si", 25, "Female")); sheet.setAutoWidth(true).setClazz(Object.class).setData(data); // Write the data to the excel file writer.write(sheet); writer.finish(); 2. Data verification EasyExcel supports the data verification of the written Excel file to ensure the legality and integrity of the data.Various verification rules can be set, such as digital range, date format, etc. The following is a sample code for setting data verification rules: // Create an excelwriter object ExcelWriter writer = EasyExcel.write("output.xlsx").build(); // Create a sheet object Sheet sheet = new Sheet(0, 0); // Create verification rules DataValidation dataValidation = writer.createDataValidation() .setFormula1("10") .setFormula2("100") .setConstraintType(DataValidationConstraint.ValidationType.INTEGER) .setShowErrorBox(true) .Seterrortital ("Data Error") .SeterrorContent ("Please enter the legal integer"); // Add verification rules in sheet sheet.setDataValidation(Collections.singletonList(dataValidation)); // data input List<List<Object>> data = new ArrayList<>(); data.add(Arrays.asList(15)); data.add(Arrays.asList(110)); sheet.setAutoWidth(true).setClazz(Object.class).setData(data); // Write the data to the excel file writer.write(sheet); writer.finish(); 3. Merge cell grid EasyExcel provides the function of merging cells, which can merge multiple adjacent cells into a large cell.The merger cells can be used to create complex table structures and layouts. The following is a sample code for merging cells: // Create an excelwriter object ExcelWriter writer = EasyExcel.write("output.xlsx").build(); // Create a sheet object Sheet sheet = new Sheet(0, 0); // Create a merging unit grid CellRangeAddress region = new CellRangeAddress(0, 0, 0, 2); // Add merging unit grid to sheet sheet.addMergeRegion(region); // data input List<List<Object>> data = new ArrayList<>(); data.add (Arrays.aslist ("Name", "Age", "Gender"); data.add (Arrays.aslist ("Zhang San", 20, "Male"); data.add (Arrays.aslist ("Li Si", 25, "Female")); sheet.setAutoWidth(true).setClazz(Object.class).setData(data); // Write the data to the excel file writer.write(sheet); writer.finish(); The above is some of the advanced features of the EasyExcel framework, and provide the corresponding Java code example.By using these advanced functions, we can handle Excel files more flexible and easily to achieve various complex needs.It is hoped that this article can help readers understand the advanced features of the EasyExcel framework and apply it in actual project development.