使用SpringBoot+React搭建一个Excel报表平台

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前言

Excel报表平台是一款功能强大、操作简单的系统平台，可以帮助用户上传、编辑和分析报表数据，实现数据可视化。

本文所描述的这个平台主要包含以下功能：

打开服务器上现有的Excel文件。
调用ToJson并将ssjson传输到客户端。
在浏览器中，从服务器调用带有ssjson的fromJSON。
可以看到Excel模板的内容。
可以在线编辑模板或填充模板上的数据。
可以下载查看Excel文件中的更改之后的内容。

项目截图

Excel模板演示：

投标跟踪器：

待办事项列表：

通讯簿：

上传报表文件：

主要代码：

前端（React）代码文件路径：

src

│ boot.tsx

│ GC.GcExcel.d.ts

│ routes.tsx

│ tree.txt

│ utility.ts

│ 

├─components

│   ExcelIODemo.tsx

│   ExcelTemplateDemo.tsx

│   Home.tsx

│   Layout.tsx

│   NavMenu.tsx

│   ProgrammingDemo.tsx

│   

├─css

│   react-select.css

│   site.css

│   vendor.css

│   

└─spread.sheets

  │ gc.spread.sheets.all.11.0.6.min.js

  │ gc.spread.sheets.Excel2013white.11.0.6.css

  │ gc.spread.sheets.Excel2016colorful.11.0.6.css

  │ 

  └─pluggable

      gc.spread.sheets.charts.11.0.6.min.js

前端代码：

1.Excel模板演示页面（ExcelTemplateDemo.tsx）：

public render() {  
 return <div className='spread-page'>  
 <h1>Excel Template Demo</h1>  
 <p>This example demonstrates how to use <strong>GcExcel</strong> as server spreadsheet model, and use <strong>Spread.Sheets</strong> as client side viewer or editor: </p>  
 <ul>  
 <li><strong>GcExcel</strong> will first open an Excel file existing on server.</li>  
 <li><strong>GcExcel</strong> then inoke <strong>ToJson</strong> and transport the ssjson to client side.</li>  
 <li>In browser, <strong>Spread.Sheets</strong> will invoke <strong>fromJSON</strong> with the ssjson from server.</li>  
 <li>Then, you can see the content of the Excel template in <strong>Spread.Sheets</strong>.</li>  
 <li>At same time, you can fill or edit data on the template through <strong>Spread.Sheets</strong>.</li>  
 <li>At last, you can download to view the changes in Excel file.</li>  
 </ul>  
 <br>  
 <div id='spreadjs' className='spread-div' >  
 </div>;  
}  

componentDidMount() {  
 this.spread = new GC.Spread.Sheets.Workbook(**document**.getElementById('spreadjs'), {  
 seetCount: 1  
 });  

 this.loadSpreadFromTemplate();  
}

2. 编程API演示界面（投标跟踪器、待办事项列表、通讯簿）（ProgrammingDemo.tsx）：

public render() {  
 return <div className='spread-page'>  
 <h1>Programming API Demo</h1>  
 <p>This example demonstrates how to programme with <strong>GcExcel</strong> to generate a complete spreadsheet model at server side, you can find all of source code in the SpreadServicesController.cs, we use <strong>Spread.Sheets</strong> as client side viewer. </p> <ul>  
 <li>You can first program with <strong>GcExcel</strong> at server side.</li>  
 <li><strong>GcExcel<strong> then inoke <strong>ToJson</strong> and transport the ssjson to client side.</li>  
 <li>In browser, <strong>Spread.Sheets</strong> will invoke <strong>fromJSON</strong> with the ssjson from server.</li>  
 <li>Then, you can view the result in <strong>Spread.Sheets</strong> or download it as Excel file.</li>  
 </ul>  
 <br>  
 <div className='btn-group'>  
 <Select className='select'  
 name="form-field-name"  
 value={this.state.value}  
 options={this.state.options}  
 onChange={this.onUseCaseChange} >  
 <button className='btn btn-default btn-md' onClick={this.exportExcel}>Export Excel</button>  
 </div>  
 <div id='spreadjs' className='spread-div' />  
 </div>;  
}  

componentDidMount() {  
 this.spread = new GC.Spread.Sheets.Workbook(**document**.getElementById('spreadjs'), {  
 seetCount: 1  
 });  

 this.loadSpreadFromUseCase(this.state.value.value);  
}

3.Excel输入和输出演示界面（ExcelIODemo.tsx）：

public render() {  
 return <div className='spread-page'>  
 <h1>Excel Input&Output Demo</h1>  
 <p>This example demonstrates how to use <strong>GcExcel</strong> as server-side spreadsheet model, and use <strong>Spread.Sheets</strong> as the front-end side viewer and editor. </p>  
 <ul>  
 <li><strong>GcExcel</strong> can import an Excel file and export to ssjson format, then transport the ssjson to client-side.</li>  
 </ul>  
 <br/>  
 <div className='btn-group'>  
 <input id="file" className='btn btn-default btn-md' type='file' onChange={this.importExcel} title='Import Excel' />  
 <button className='btn btn-default btn-md' onClick={this.exportExcel}>Export Excel</button>  
 </div>  
 <div id='spreadjs' className='spread-div' />  
 </div>;  
}  

*/**  
 * 在客户端上传一个Excel文件，在服务器端打开该文件，然后将ssjson传输到客户端  
 */  
*importExcel(e : any) {  
 var selectedFile = e.target.files[0];  
 if (!selectedFile) {  
 this.selectedFileName = null;  
 return;  
 }  

 this.selectedFileName = selectedFile.name;  
 var requestUrl = '/open';  
 fetch(requestUrl, {  
 method: 'POST',  
 body: selectedFile  
 }).then(response => response.json() as Promise<object>)  
 .then(data => {  
 this.spread.fromJSON(data);   
 });  
}  

*/**  
 * 从Spread.Sheets传输ssjson并保存和下载Excel文件  
 */  
*exportExcel(e : any) {  
 var ssjson = **JSON**.stringify(this.spread.toJSON(null));  
 Utility.*ExportExcel*(ssjson, this.selectedFileName);  
}

后端代码：

后端代码使用GCExcel(一款基于Java的报表插件)实现，详细的代码如下所示：

后端代码(SpringBoot)文件路径：

src:.

│

└─main

├─java

│ └─com

│ └─grapecity

│ └─documents

│ └─demo

│ │ Application.java

│ │

│ └─controller

│ GcExcelController.java

│

└─resources

│ application.properties

│

├─public

│ │ bundle.js

│ │ bundle.js.map

│ │ favicon-16x16.png

│ │ favicon-32x32.png

│ │ index.html

│ │

│ ├─css

│ │ site.css

│ │ site.css.map

│ │ vendor.css

│ │

│ └─spreadJS

│ │ gc.spread.sheets.all.11.0.6.min.js

│ │ gc.spread.sheets.Excel2013white.11.0.6.css

│ │ gc.spread.sheets.Excel2016colorful.11.0.6.css

│ │

│ └─pluggable

│ gc.spread.sheets.charts.11.0.6.min.js

│

└─static

└─error

404.html

投标跟踪器（GcExcelController.java）：使用到了GcExcel的单元格内标签调整表格大小。

Workbook workbook = new Workbook();  

IWorksheet worksheet = workbook.getWorksheets().get(0);  

//***********************Set RowHeight & ColumnWidth***************  
worksheet.setStandardHeight(30);  
worksheet.getRange("1:1").setRowHeight(57.75);  
worksheet.getRange("2:9").setRowHeight(30.25);  
worksheet.getRange("A:A").setColumnWidth(2.71);  
worksheet.getRange("B:B").setColumnWidth(11.71);  
worksheet.getRange("C:C").setColumnWidth(28);  

//**************************Set Table Value & Formulas*********************  
ITable table = worksheet.getTables().add(worksheet.getRange("B2:H9"), true);  
worksheet.getRange("B2:H9")  
 .setValue(new Object[][] { { "BID #", "DESCRIPTION", "DATE RECEIVED", "AMOUNT", "PERCENT COMPLETE", "DEADLINE", "DAYS LEFT" }, { 1, "Bid number 1", null, 2000, 0.5, null, null },  
 { 2, "Bid number 2", null, 3500, 0.25, null, null }, { 3, "Bid number 3", null, 5000, 0.3, null, null }, { 4, "Bid number 4", null, 4000, 0.2, null, null },;  
worksheet.getRange("B1").setValue("Bid Details");  
worksheet.getRange("D3").setFormula("=TODAY()-10");  
worksheet.getRange("D4:D5").setFormula("=TODAY()-20");  
//****************************Set Table   
ITableStyle tableStyle = workbook.getTableStyles().add("Bid Tracker");  
workbook.setDefaultTableStyle("Bid Tracker");

待办事项列表（GcExcelController.java）：使用到了GcExcel的setValue方法给表格内容赋值。

Workbook workbook = new Workbook();  

Object[] data = new Object[][] { { "TASK", "PRIORITY", "STATUS", "START DATE", "DUE DATE", "% COMPLETE", "DONE?", "NOTES" },  
 { "First Thing I Need To Do", "Normal", "Not Started", null, null, 0, null, null }, { "Other Thing I Need To Finish", "High", "In Progress", null, null, 0.5, null, null },  
 { "Something Else To Get Done", "Low", "Complete", null, null, 1, null, null }, { "More Errands And Things", "Normal", "In Progress", null, null, 0.75, null, null },  
 { "So Much To Get Done This Week", "High", "In Progress", null, null, 0.25, null, null } };  

IWorksheet worksheet = workbook.getWorksheets().get(0);  
worksheet.setName("To-Do List");  
worksheet.setTabColor(Color.*FromArgb*(148, 112, 135));  
worksheet.getSheetView().setDisplayGridlines(false);  

//Set Value.  
worksheet.getRange("B1").setValue("To-Do List");  
worksheet.getRange("B2:I7").setValue(data);  

//Set formula.  
worksheet.getRange("E3").setFormula("=TODAY()");  
worksheet.getRange("E4").setFormula("=TODAY()-30");

3.通讯簿（GcExcelController.java）：

Workbook workbook = new Workbook();  

IWorksheet worksheet = workbook.getWorksheets().get(0);  

// ***************************Set RowHeight & Width****************************  
worksheet.setStandardHeight(30);  
worksheet.getRange("3:4").setRowHeight(30.25);  
worksheet.getRange("1:1").setRowHeight(103.50);  
worksheet.getRange("2:2").setRowHeight(38.25);  
worksheet.getRange("A:A").setColumnWidth(2.625);  
worksheet.getRange("B:B").setColumnWidth(22.25);  


// *******************************Set Table Value &  
// Formulas*************************************  
ITable table = worksheet.getTables().add(worksheet.getRange("B2:L4"), true);  
worksheet.getRange("B2:L4")  
 .setValue(new Object[][] { { "NAME", "WORK", "CELL", "HOME", "EMAIL", "BIRTHDAY", "ADDRESS", "CITY", "STATE", "ZIP", "NOTE" },  
 { "Kim Abercrombie", 1235550123, 1235550123, 1235550123, "someone@example.com", null, "123 N. Maple", "Cherryville", "WA", 98031, "" },  
 { "John Smith", 3215550123L, "", "", "someone@example.com", null, "456 E. Aspen", "", "", "", "" }, });  
worksheet.getRange("B1").setValue("ADDRESS BOOK");  
worksheet.getRange("G3").setFormula("=TODAY()");  
worksheet.getRange("G4").setFormula("=TODAY()+5");  

// ****************************Set Table Style********************************  
ITableStyle tableStyle = workbook.getTableStyles().add("Personal Address Book");  
workbook.setDefaultTableStyle("Personal Address Book");  

// Set WholeTable element style.  
// Set FirstColumn element style.  
tableStyle.getTableStyleElements().get(TableStyleElementType.*FirstColumn*).getFont().setBold(true);  

// Set SecondColumns element style.  
tableStyle.getTableStyleElements().get(TableStyleElementType.*HeaderRow*).getBorders().setColor(Color.*FromArgb*(179, 35, 23));  
tableStyle.getTableStyleElements().get(TableStyleElementType.*HeaderRow*).getBorders().get(BordersIndex.*EdgeTop*).setLineStyle(BorderLineStyle.*Thick*);  
tableStyle.getTableStyleElements().get(TableStyleElementType.*HeaderRow*).getBorders().get(BordersIndex.*EdgeBottom*).setLineStyle(BorderLineStyle.*Thick*);