DynamicJasper：如何设置globalFooterVariable样式及报表全局字体大小？

Great question! Let's break this down into two clear parts: styling your global footer sum variables and adjusting the overall report font size (since your code uses drb from the DynamicReports library).

Styling Global Footer Variables #

To apply custom styling (like bold text, alignment, color, or font size) to your footer sum variables, you’ll create a StyleBuilder and pass it as an extra parameter when calling addGlobalFooterVariable().

First, define your footer style using DynamicReports’ stl utility class:

import net.sf.dynamicreports.report.builder.style.StyleBuilder;
import static net.sf.dynamicreports.report.builder.DynamicReports.stl;
import java.awt.Color;

// Build a custom style for footer sums
StyleBuilder footerSumStyle = stl.style()
    .bold() // Make text bold for emphasis
    .setFontSize(12) // Adjust footer font size
    .setTextAlignment(stl.textAlignment().right()) // Align numbers to the right (standard for sums)
    .setForegroundColor(Color.DARK_GRAY) // Optional: change text color
    .setBorder(stl.border().bottom(stl.pen1Point())); // Add a thin bottom border to separate sums

Then attach this style to each footer variable:

drb.addGlobalFooterVariable(totalAmount, DJCalculation.SUM, footerSumStyle);
drb.addGlobalFooterVariable(basicAmount, DJCalculation.SUM, footerSumStyle);
drb.addGlobalFooterVariable(cgstColumn, DJCalculation.SUM, footerSumStyle);
drb.addGlobalFooterVariable(sgstColumn, DJCalculation.SUM, footerSumStyle);

You can also create unique styles for individual variables if needed—just repeat the style-building step with different properties.

Adjusting the Entire Report's Font Size #

To set a base font size for the whole report, define a default style and apply it to your report using setDefaultStyle(). All elements will inherit this style unless you override it for specific components.

// Create a default style with your desired base font size
StyleBuilder defaultReportStyle = stl.style()
    .setFontSize(10); // Set your preferred base font size here

// Apply the default style to the report
drb.setDefaultStyle(defaultReportStyle);

If you want certain elements (like headers, titles, or specific columns) to have a different size, override the default style for those components:

// Example: Larger, bold title style
StyleBuilder titleStyle = stl.style(defaultReportStyle)
    .setFontSize(16)
    .bold();

drb.title(drb.text("Monthly Tax Report").setStyle(titleStyle));

Bonus: Extra Styling Tips #

You can tweak your footer style even more with these common options:

• .setPadding(stl.padding().top(5).bottom(5)): Add vertical padding to the footer row
• .setBackgroundColor(Color.LIGHT_GRAY): Add a subtle background color to highlight sums
• .setFontName("Arial"): Change the font family for the footer text

内容的提问来源于stack exchange，提问作者Preciso Sensedge