Grails示例程序-導出Excel文檔

時間 2019-12-19

標籤 grails 示例程序導出 excel 文檔欄目 Microsoft Office 简体版

原文原文鏈接

程序只有一個頁面，點擊下載連接，下載Excel文檔，該文檔有兩個sheet，這兩個sheet和裏面的內容是使用JExcelApi生成的。html

顯示下載頁面

增長一個下載頁面的controller和viewgit

SampleExcelController .groovygithub

<!-- lang: groovy -->
package com.tutorial

class SampleExcelController {
    def index() { }
}

index.gspapi

<!-- lang: groovy -->
<!DOCTYPE html>
<html>
<head>
    <meta name="layout" content="main"/>
    <title>Simple Chat</title>
</head>

<body>
    <g:link action="downloadSampleExcel">Download Sample Excel</g:link>
</body>
</html>

引入JExcelApi庫文件

在config/BuildConfig.groovy中引入jexcelapi的包文件瀏覽器

<!-- lang: groovy -->
dependencies {
    runtime 'net.sourceforge.jexcelapi:jxl:2.6.12'
}

Excel文檔下載

下面的代碼用來生成Excel文檔並提供下載服務器

<!-- lang: groovy -->
package com.tutorial

import jxl.Workbook
import jxl.write.Label
import jxl.write.WritableSheet
import jxl.write.WritableWorkbook

class SampleExcelController {

    def index() { }

    def downloadSampleExcel() {
        response.setContentType('application/vnd.ms-excel')
        response.setHeader('Content-Disposition', 'Attachment;Filename="example.xls"')

        WritableWorkbook workbook = Workbook.createWorkbook(response.outputStream)
        WritableSheet sheet1 = workbook.createSheet("Students", 0)
        sheet1.addCell(new Label(0,0, "First Name"))
        sheet1.addCell(new Label(1,0, "Last Name"))
        sheet1.addCell(new Label(2,0, "Age"))

        sheet1.addCell(new Label(0,1, "John"))
        sheet1.addCell(new Label(1,1, "Doe"))
        sheet1.addCell(new Label(2,1, "20"))

        sheet1.addCell(new Label(0,2, "Jane"))
        sheet1.addCell(new Label(1,2, "Smith"))
        sheet1.addCell(new Label(2,2, "18"))

        WritableSheet sheet2 = workbook.createSheet("Courses", 1)
        sheet2.addCell(new Label(0,0, "Course Name"))
        sheet2.addCell(new Label(1,0, "Number of units"))

        sheet2.addCell(new Label(0,1, "Algebra"))
        sheet2.addCell(new Label(1,1, "3"))

        sheet2.addCell(new Label(0,2, "English Grammar"))
        sheet2.addCell(new Label(1,2, "5"))

        workbook.write();
        workbook.close();
    }
}

知識點

1.下面的代碼告訴瀏覽器，須要下載的文檔類型以及文件名app

<!-- lang: groovy -->
response.setContentType('application/vnd.ms-excel')
response.setHeader('Content-Disposition', 'Attachment;Filename="example.xls"')

2.WritableWorkbook用來建立一個Excel文檔實例，經過response.outputStream響應告訴咱們，這個文檔不是保存到服務器端，而是直接發送給瀏覽器ui

3.WritableSheet的第二個參數是sheet的索引，0表明第一個插件

4.addCell中第一和第二個參數則是Excel表格中的座標值excel