一、文檔類型介紹
1、Excel文檔
Excel一款電子表格軟件。直觀的界面、出色的計算功能和圖表工具，在系統(tǒng)開發(fā)中，經(jīng)常用來把數(shù)據(jù)轉(zhuǎn)存到Excel文件，或者Excel數(shù)據(jù)導入系統(tǒng)中，這就涉及數(shù)據(jù)轉(zhuǎn)換問題。
2、PDF文檔
PDF是可移植文檔格式，是一種電子文件格式，具有許多其他電子文檔格式無法相比的優(yōu)點。PDF文件格式可以將文字、字型、格式、顏色及獨立于設備和分辨率的圖形圖像等封裝在一個文件中。該格式文件還可以包含超文本鏈接、聲音和動態(tài)影像等電子信息，支持特長文件，集成度和安全可靠性都較高。
二、Excel文件管理
1、POI依賴
Apache POI是Apache軟件基金會的開源類庫，POI提供API給Java程序?qū)icrosoft Office格式檔案讀和寫的功能。
github: https://github.com/apache/poi
<!-- Excel 依賴 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.9</version>
</dependency>
<!-- 2007及更高版本 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>2、文件讀取
public static List<List<Object>> readExcel(String path) throws Exception {
File file = new File(path) ;
List<List<Object>> list = new LinkedList<>();
XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
// 讀取 Sheet1 表格內(nèi)容
XSSFSheet sheet = xwb.getSheetAt(0);
// 讀取行數(shù)：不讀取Excel表頭
for (int i = (sheet.getFirstRowNum()+1); i <= (sheet.getPhysicalNumberOfRows()-1); i++) {
XSSFRow row = sheet.getRow(i);
if (row == null) { continue; }
List<Object> linked = new LinkedList<>();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
XSSFCell cell = row.getCell(j);
if (cell == null) { continue; }
Object value ;
// 這里需根據(jù)實際業(yè)務情況處理
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_NUMERIC:
//處理數(shù)值帶{.0}問題
value = Double.valueOf(String.valueOf(cell)).longValue() ;
break;
default:
value = cell.toString();
}
linked.add(value);
}
if (linked.size()!= 0) {
list.add(linked);
}
}
return list;
}3、文件創(chuàng)建
public static void createExcel(String excelName, String[] headList,List<List<Object>> dataList)
throws Exception {
// 創(chuàng)建 Excel 工作簿
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet();
// 創(chuàng)建表頭
XSSFRow row = sheet.createRow(0);
for (int i = 0; i < headList.length; i++) {
XSSFCell cell = row.createCell(i);
cell.setCellType(XSSFCell.CELL_TYPE_STRING);
cell.setCellValue(headList[i]);
}
//添加數(shù)據(jù)
for (int line = 0; line < dataList.size(); line++) {
XSSFRow rowData = sheet.createRow(line+1);
List<Object> data = dataList.get(line);
for (int j = 0; j < headList.length; j++) {
XSSFCell cell = rowData.createCell(j);
cell.setCellType(XSSFCell.CELL_TYPE_STRING);
cell.setCellValue((data.get(j)).toString());
}
}
FileOutputStream fos = new FileOutputStream(excelName);
workbook.write(fos);
fos.flush();
fos.close();
}4、文件導出
public static void exportExcel(String[] headList, List<List<Object>> dataList,
OutputStream outputStream) throws Exception {
// 創(chuàng)建 Excel 工作簿
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.createSheet();
// 創(chuàng)建表頭
XSSFRow row = sheet.createRow(0);
for (int i = 0; i < headList.length; i++) {
XSSFCell cell = row.createCell(i);
cell.setCellType(XSSFCell.CELL_TYPE_STRING);
cell.setCellValue(headList[i]);
}
//添加數(shù)據(jù)
for (int line = 0; line < dataList.size(); line++) {
XSSFRow rowData = sheet.createRow(line+1);
List<Object> data = dataList.get(line);
for (int j = 0; j < headList.length; j++) {
XSSFCell cell = rowData.createCell(j);
cell.setCellType(XSSFCell.CELL_TYPE_STRING);
cell.setCellValue((data.get(j)).toString());
}
}
workbook.write(outputStream);
outputStream.flush();
outputStream.close();
}5、文件導出接口
@RestController
public class ExcelDownLoadWeb {
@RequestMapping("/file/outExcel")
public void outExcel (HttpServletResponse response) throws Exception {
String exportName = "2023-05-BSDATA" ;
response.setContentType("application/vnd.ms-excel");
response.addHeader("Content-Disposition", "attachment;filename="+
URLEncoder.encode(exportName, "UTF-8") + ".xlsx");
List<List<Object>> dataList = ExcelUtil.readExcel("F:\\file-type\\user-excel.xlsx") ;
String[] headList = new String[]{"測站", "時間", "降雨量"} ;
ExcelUtil.exportExcel(headList,dataList,response.getOutputStream()) ;
}
}三、PDF文件管理
1、IText依賴
iText是一種生成PDF報表的Java組件。通過在服務器端使用頁面或API封裝生成PDF報表，客戶端可以通過超鏈接直接顯示或下載到本地，在系統(tǒng)開發(fā)中通常用來生成比較正式的報告或者合同類的電子文檔。
github: https://github.com/itext/itextpdf
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.11</version>
</dependency>
<dependency>
<groupId>com.itextpdf.tool</groupId>
<artifactId>xmlworker</artifactId>
<version>5.5.11</version>
</dependency>2、API二次封裝
首先對于Itext提供的API做一下表格、段落、圖片等基礎樣式的二次封裝，可以更好的適配業(yè)務。
public class PdfFontUtil {
private PdfFontUtil(){}
/**
* 段落樣式獲取
*/
public static Paragraph getParagraph (String content, Font font,Integer alignment){
Paragraph paragraph = new Paragraph(content,font) ;
if (alignment != null && alignment >= 0){
paragraph.setAlignment(alignment);
}
return paragraph ;
}
/**
* 圖片樣式
*/
public static Image getImage (String imgPath,float width,float height) throws Exception {
Image image = Image.getInstance(imgPath);
image.setAlignment(Image.MIDDLE);
if (width > 0 && height > 0){
image.scaleAbsolute(width, height);
}
return image ;
}
/**
* 表格生成
*/
public static PdfPTable getPdfPTable01 (int numColumns,float totalWidth) throws Exception {
// 表格處理
PdfPTable table = new PdfPTable(numColumns);
// 設置表格寬度比例為%100
table.setWidthPercentage(100);
// 設置寬度:寬度平均
table.setTotalWidth(totalWidth);
// 鎖住寬度
table.setLockedWidth(true);
// 設置表格上面空白寬度
table.setSpacingBefore(10f);
// 設置表格下面空白寬度
table.setSpacingAfter(10f);
// 設置表格默認為無邊框
table.getDefaultCell().setBorder(0);
table.setPaddingTop(50);
table.setSplitLate(false);
return table ;
}
/**
* 表格內(nèi)容
*/
public static PdfPCell getPdfPCell (Phrase phrase){
return new PdfPCell (phrase) ;
}
/**
* 表格內(nèi)容帶樣式
*/
public static void addTableCell (PdfPTable dataTable,Font font,List<String> cellList){
for (String content:cellList) {
dataTable.addCell(getParagraph(content,font,-1));
}
}
}3、生成PDF文件
這里基于上面的工具類，畫一個PDF頁面作為參考。文章來源：http://www.zghlxwxcb.cn/news/detail-605241.html
public class PdfPagetTest {
// 基礎配置
private static String PDF_SITE = "E:\\temp\\PDF頁面2023-04-15.pdf" ;
private static String FONT = "C:/Windows/Fonts/simhei.ttf";
private static String PAGE_TITLE = "PDF" ;
// 基礎樣式
private static Font TITLE_FONT = FontFactory.getFont(FONT, BaseFont.IDENTITY_H,20, Font.BOLD);
private static Font NODE_FONT = FontFactory.getFont(FONT, BaseFont.IDENTITY_H,15, Font.BOLD);
private static Font BLOCK_FONT = FontFactory.getFont(FONT, BaseFont.IDENTITY_H,13, Font.BOLD, BaseColor.BLACK);
private static Font INFO_FONT = FontFactory.getFont(FONT, BaseFont.IDENTITY_H,12, Font.NORMAL,BaseColor.BLACK);
private static Font CONTENT_FONT = FontFactory.getFont(FONT, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
private static void createPdfPage () throws Exception {
// 創(chuàng)建文檔
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(PDF_SITE));
document.open();
// 報告標題
document.add(PdfFontUtil.getParagraph(PAGE_TITLE,TITLE_FONT,1)) ;
document.add(PdfFontUtil.getParagraph("\n商戶名稱：XXX科技有限公司",INFO_FONT,-1)) ;
document.add(PdfFontUtil.getParagraph("\n生成時間：2020-01-15\n\n",INFO_FONT,-1)) ;
// 報告內(nèi)容
// 段落標題 + 報表圖
document.add(PdfFontUtil.getParagraph("城市數(shù)據(jù)分布統(tǒng)計",NODE_FONT,-1)) ;
document.add(PdfFontUtil.getParagraph("\n· 可視化圖表\n\n",BLOCK_FONT,-1)) ;
// 設置圖片寬高
float documentWidth = document.getPageSize().getWidth() - document.leftMargin() - document.rightMargin();
float documentHeight = documentWidth / 580 * 320;
document.add(PdfFontUtil.getImage("F:\\file-type\\myChart.jpg",documentWidth-80,documentHeight-80)) ;
// 數(shù)據(jù)表格
document.add(PdfFontUtil.getParagraph("\n· 數(shù)據(jù)詳情\n\n",BLOCK_FONT,-1)) ;
PdfPTable dataTable = PdfFontUtil.getPdfPTable01(4,400) ;
// 設置表格
List<String> tableHeadList = tableHead () ;
List<List<String>> tableDataList = getTableData () ;
PdfFontUtil.addTableCell(dataTable,CONTENT_FONT,tableHeadList);
for (List<String> tableData : tableDataList) {
PdfFontUtil.addTableCell(dataTable,CONTENT_FONT,tableData);
}
document.add(dataTable);
document.add(PdfFontUtil.getParagraph("\n· 報表描述\n\n",BLOCK_FONT,-1)) ;
document.add(PdfFontUtil.getParagraph("數(shù)據(jù)報告可以監(jiān)控每天的推廣情況，" +
"可以針對不同的數(shù)據(jù)表現(xiàn)進行分析，以提升推廣效果。",CONTENT_FONT,-1)) ;
document.newPage() ;
document.close();
writer.close();
}
private static List<List<String>> getTableData (){
List<List<String>> tableDataList = new ArrayList<>() ;
for (int i = 0 ; i < 3 ; i++){
List<String> tableData = new ArrayList<>() ;
tableData.add("浙江"+i) ;
tableData.add("杭州"+i) ;
tableData.add("276"+i) ;
tableData.add("33.3%") ;
tableDataList.add(tableData) ;
}
return tableDataList ;
}
private static List<String> tableHead (){
List<String> tableHeadList = new ArrayList<>() ;
tableHeadList.add("省份") ;
tableHeadList.add("城市") ;
tableHeadList.add("數(shù)量") ;
tableHeadList.add("百分比") ;
return tableHeadList ;
}
public static void main(String[] args) throws Exception {
createPdfPage () ;
}
}4、頁面效果
文章來源地址http://www.zghlxwxcb.cn/news/detail-605241.html
四、網(wǎng)頁轉(zhuǎn)PDF
1、頁面Jar包依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>2、編寫頁面樣式
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head>
<meta charset="UTF-8"/>
<title>Title</title>
<style>
body{font-family:SimSun;}
</style>
</head>
<body>
項目信息：<br/>
名稱：${name}<br/>
作者：${author}<br/><br/>
<img
src="https://oscimg.oschina.net/oscnet/up-612b9330a67ba747846b0e0890e4906678b.png"/>
<br/>
</body>
</html>3、核心配置類
public class PageConfig {
private static final String DEST = "F:\\file-type\\HTML頁面2020-01-15.pdf";
private static final String HTML = "/pdf_page_one.html";
private static final String FONT = "C:/Windows/Fonts/simsun.ttc";
private static Configuration freemarkerCfg = null ;
static {
freemarkerCfg = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);
//freemarker的模板目錄
try {
String path = "TODO:模板路徑{自定義}" ;
freemarkerCfg.setDirectoryForTemplateLoading(new File(path));
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 創(chuàng)建文檔
*/
private static void createPdf(String content,String dest) throws Exception {
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
document.open();
XMLWorkerFontProvider fontImp = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
fontImp.register(FONT);
XMLWorkerHelper.getInstance().parseXHtml(writer, document,
new ByteArrayInputStream(content.getBytes()), null, Charset.forName("UTF-8"), fontImp);
document.close();
}
/**
* 頁面渲染
*/
private static String freeMarkerRender(Map<String, Object> data, String htmlTmp) throws Exception {
Writer out = new StringWriter();
Template template = freemarkerCfg.getTemplate(htmlTmp,"UTF-8");
template.process(data, out);
out.flush();
out.close();
return out.toString();
}
/**
* 方法入口
*/
public static void main(String[] args) throws Exception {
Map<String,Object> data = new HashMap<> ();
data.put("name","smile");
data.put("author","知了") ;
String content = PageConfig.freeMarkerRender(data,HTML);
PageConfig.createPdf(content,DEST);
}
}到了這里，關(guān)于SpringBoot與文檔excel，pdf集成案例分享的文章就介紹完了。如果您還想了解更多內(nèi)容，請在右上角搜索TOY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！
