How to use template functions in Go language to dynamically generate Excel reports?

How to use template functions in Go language to dynamically generate Excel reports?

Introduction:
In actual development, generating reports in various formats is one of the very common requirements. As a commonly used reporting tool, Excel is widely used in all walks of life. As an efficient and concise programming language, Go language provides a powerful set of tools that can be used to generate Excel reports.

This article will introduce how to use template functions in the Go language to dynamically generate Excel reports. Through simple sample codes, it will help readers better understand and practice this technology.

1. Introduction to Excel report generation library
Currently, there are many excellent Excel report generation libraries to choose from in the Go language community, such as:

1. "github. com/tealeg/xlsx": This library provides a rich set of APIs that can be used to create, read and modify Excel files. In this article, we will use this library to generate Excel reports.

The command to install the library is:

go get github.com/tealeg/xlsx

2. Excel report generation steps
The following are the basic steps to use the template function in the Go language to dynamically generate Excel reports:

1. Create an Excel file object:

   file := xlsx.NewFile()

2. Create an Excel table object:

   sheet, err := file.AddSheet("Sheet1")

3. To the table Add header information to the table:

   header := sheet.AddRow() // 创建一行
   header.SetHeight(20)     // 设置行高
   
   cell := header.AddCell()   // 创建单元格
   cell.Value = "姓名"         // 设置单元格的值
   
   cell = header.AddCell()    // 创建单元格
   cell.Value = "年龄"        // 设置单元格的值

4. Add data rows to the table:

   data := []struct{
    Name string
    Age int
   }{
    {"张三", 20},
    {"李四", 25},
    {"王五", 30},
   }
   
   for _, item := range data {
    row := sheet.AddRow()    // 创建一行
    row.SetHeight(20)        // 设置行高
   
    cell := row.AddCell()    // 创建单元格
    cell.Value = item.Name   // 设置单元格的值
   
    cell = row.AddCell()     // 创建单元格
    cell.SetInt(item.Age)    // 设置单元格的值
   }

5. Save the Excel file:

   err := file.Save("report.xlsx")
   if err != nil {
    // 错误处理
   }

3. Sample code for dynamically generating Excel reports using template functions
The following is a sample code for dynamically generating Excel reports using Go language template functions:

package main

import (
    "github.com/tealeg/xlsx"
)

func main() {
    // 创建Excel文件对象
    file := xlsx.NewFile()

    // 创建Excel表格对象
    sheet, err := file.AddSheet("Sheet1")
    if err != nil {
        // 错误处理
    }

    // 向表格中添加表头信息
    header := sheet.AddRow()
    header.SetHeight(20)

    cell := header.AddCell()
    cell.Value = "姓名"

    cell = header.AddCell()
    cell.Value = "年龄"

    // 向表格中添加数据行
    data := []struct {
        Name string
        Age  int
    }{
        {"张三", 20},
        {"李四", 25},
        {"王五", 30},
    }

    for _, item := range data {
        row := sheet.AddRow()
        row.SetHeight(20)

        cell := row.AddCell()
        cell.Value = item.Name

        cell = row.AddCell()
        cell.SetInt(item.Age)
    }

    // 保存Excel文件
    err = file.Save("report.xlsx")
    if err != nil {
        // 错误处理
    }
}

Through the above sample code, We can generate an Excel report file named "report.xlsx" locally, and it contains header information and data rows.

Conclusion:
This article introduces how to use template functions in the Go language to achieve dynamic generation of Excel reports. By using the "github.com/tealeg/xlsx" library and simple code examples, we can easily generate rich Excel reports in various formats. It is hoped that readers can use this technology in actual development, save time and energy, and improve work efficiency.

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