Easyexcel sets the style of the last row [which can be expanded to each row]

1、 Summary

This article mainly introduces the style setting of the last row of the table , According to the content of this article , Expand to the style setting of each line

2、 Demand is introduced

The original table is as follows , Now simply want to bold the total line

3、 Realization

stay Excel in , Set the style of the row by WriteCellStyle Object , You can see from the picture above , Now the generated table , The style of each line is consistent , The original style code is as follows ：

//  Table content style 
WriteCellStyle bodyStyle = new WriteCellStyle();
//  Font style 
bodyStyle.setWriteFont(ExcelUtil.setFont(12, "Arial", false));
//  Set borders 
// bodyStyle.setBorderTop(BorderStyle.DOUBLE);
bodyStyle.setBorderLeft(BorderStyle.THIN);
bodyStyle.setBorderRight(BorderStyle.THIN);
bodyStyle.setBorderBottom(BorderStyle.THIN);
// Set style policy     headStyle It's the head style , I'm not going to write it here 
HorizontalCellStyleStrategy dataTableStrategy = new HorizontalCellStyleStrategy(headStyle, bodyStyle);

setFont The method is my modified text style method , The code is as follows ：

public class ExcelUtil{

    /**
     * @purpose  Set the font 
     * @parameter name by null Indicates that the font is not set 
     */
    public static WriteFont setFont(int size, String name, boolean condition) {
        WriteFont font = new WriteFont();
        //  size 
        font.setFontHeightInPoints((short) size);
        //  typeface 
        if (!ObjectUtils.isEmpty(name)) {
            font.setFontName(name);
        }
        //  Is it bold 
        font.setBold(condition);
        return font;
    }

}

Transformation begins ：

So let's see first Excel Of  HorizontalCellStyleStrategy The source code of the strategy , You can see that easyExcel How to implement the style of each line , Source code is as follows ：

Let's take a look at my previous style implementation , call HorizontalCellStyleStrategy What is the construction method of ？

public HorizontalCellStyleStrategy(WriteCellStyle headWriteCellStyle, WriteCellStyle contentWriteCellStyle) {
        this.headWriteCellStyle = headWriteCellStyle;
        if (contentWriteCellStyle != null) {
            this.contentWriteCellStyleList = ListUtils.newArrayList(contentWriteCellStyle);
        }
    }

Look at the source code if Code in statement ：

this.contentWriteCellStyleList = ListUtils.newArrayList(contentWriteCellStyle);

That's why when I use this code , The style of each line is consistent ：

new HorizontalCellStyleStrategy(headStyle, bodyStyle);

  a key 1：

easyExcel The table style I set bodyStyle Perform traversal replication ！ Generate a list, So as to achieve the style effect of each line

  a key 2：

HorizontalCellStyleStrategy There is also a construction method , Support the direct input of a style collection  List<WriteCellStyle> , To style each line ！

public HorizontalCellStyleStrategy(WriteCellStyle headWriteCellStyle,
        List<WriteCellStyle> contentWriteCellStyleList) {
        this.headWriteCellStyle = headWriteCellStyle;
        this.contentWriteCellStyleList = contentWriteCellStyleList;
    }

Is there a way of thinking ？ To achieve it.

Code transformation ：

// Table content style 
WriteCellStyle bodyStyle = new WriteCellStyle();
//  Font style 
bodyStyle.setWriteFont(ExcelUtil.setFont(12, "Arial", false));
//  Set borders 
// bodyStyle.setBorderTop(BorderStyle.DOUBLE);
bodyStyle.setBorderLeft(BorderStyle.THIN);
bodyStyle.setBorderRight(BorderStyle.THIN);
bodyStyle.setBorderBottom(BorderStyle.THIN);

// 1> Create the style of the last line 
WriteCellStyle lastRow = new WriteCellStyle();
// 2> Set bold , Keep consistent with other styles 
lastRow.setWriteFont(ExcelUtil.setFont(12, "Arial", true));
lastRow.setBorderLeft(BorderStyle.THIN);
lastRow.setBorderRight(BorderStyle.THIN);
lastRow.setBorderBottom(BorderStyle.THIN);
// 3> According to the total number of rows ], Overlay to generate the style of the last line List
List<WriteCellStyle> preList = new ArrayList<>();
// 4>data Is the generated table data set ,data.size()-1 Indicates the number of rows except the last row 
for (int i = 0; i < data.size()- 1; i++) {
    preList.add(bodyStyle);
}
// 5> Add the style of the last line 
preList.add(lastRow);
// 6> Create a strategy ,headStyle It's the head style , I'm not going to write it here 
HorizontalCellStyleStrategy dataTableStrategy = new HorizontalCellStyleStrategy(headStyle, preList);

effect ：

  The last line is bold ！

4、 Development train of thought

This article just sets the style of the last line , In actual development , We can customize the style of each line , Of course , In practice , If there is 20 That's ok , It's impossible to set different colors for each line , It is usually an odd number of lines in one style , Even lines have one style ！ The method is similar to the above code , Just judge Is it strange （ accidentally ） Number identification , Generate list Style collection ！