EasyExcel Dynamic Columns【Application Scenario】Dynamic Display of Columns with Export Performance Considerations

# 1. Introduction

In everyday development work, we often encounter situations where we need to handle Excel files, including reading data and generating reports. For Excel files containing dynamic columns, traditional approaches may seem cumbersome, especially in terms of dynamic column display and export. To handle Excel files with dynamic columns more efficiently, we can leverage the EasyExcel tool to simplify operations and improve efficiency.

**EasyExcel** is an Excel reading and writing tool developed based on the Java language, characterized by its simplicity of operation and high performance. The importance of dynamic columns in Excel files is self-evident, as we often cannot predetermine the number of columns in an Excel file and need to dynamically add or display columns. In this article, we will delve into the application scenarios of dynamic columns, how EasyExcel implements dynamic columns, and how to optimize export performance to help readers better handle Excel files with dynamic columns.

# 2. **Application Scenarios of Dynamic Columns**

In real-world software development, the dynamic column function is widely and crucially applied. Below we will discuss the application of dynamic columns in various scenarios:

### **Data Table Display**

In data management systems, it is often necessary to display various data tables, but the number of columns in the tables may dynamically change based on user needs or different conditions. Through the dynamic column function, users can choose which columns to display according to their own needs, without being limited by a fixed number of columns. This flexibility not only enhances the user experience but also increases the applicability and scalability of the system.

### **Report Generation**

Generating various reports is one of the important functions of enterprise management. Different reports may need to display different data indicators, so the number of columns in the tables also needs to be dynamically adjusted. With the dynamic column function, columns can be dynamically generated according to report requirements, making report content more complete, clear, and convenient for users to analyze data and make decisions.

In the above application scenarios, the importance of the dynamic column function is self-evident. It not only improves the user experience but also brings new possibilities for the flexibility and applicability of the system. Next, we will discuss how to use the EasyExcel tool to implement the dynamic column function.

# 3. **How EasyExcel Implements Dynamic Columns**

In practical development, we often encounter situations where dynamic columns need to be handled, such as dynamically displaying different column data based on user input conditions. As a powerful Excel processing tool, EasyExcel provides a convenient way to implement the dynamic column function. Below we will introduce how to use the EasyExcel library to implement dynamic columns.

#### **1. Dynamically Adding Columns**

First, we need to dynamically add columns to the Excel table according to specific requirements. We can set the column information that needs to be filled us