itextpdf代码生成pdf直接下载

1、pom文件中引入

    com.itextpdf
    itextpdf
    5.5.13



    com.itextpdf
    itext-asian
    5.2.0


    com.itextpdf.tool
    xmlworker
    5.5.11

2、pdf样式类

package com.agileplat.supplychain.util;

import com.itextpdf.text.*;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfPCell;
import com.itextpdf.text.pdf.PdfPTable;

public class PdfUtil {
    // 标准字体
    public static Font NORMALFONT;
    // 加粗字体
    public static Font BOLDFONT;
    //固定高
    public static float fixedHeight = 27f;
    //间距
    public static int spacing = 5;

    static {
        try {
            BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            NORMALFONT = new Font(bfChinese, 10, Font.NORMAL);
            BOLDFONT = new Font(bfChinese, 14, Font.BOLD);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public static Document createDocument() {
        //生成pdf
        Document document = new Document();
        // 页面大小
        Rectangle rectangle = new Rectangle(PageSize.A4);
        // 页面背景颜色
        rectangle.setBackgroundColor(BaseColor.WHITE);
        document.setPageSize(rectangle);
        // 页边距 左，右，上，下
        document.setMargins(20, 20, 20, 20);
        return document;
    }


    /**
     * @param text 段落内容
     * @return
     */
    public static Paragraph createParagraph(String text, Font font,int space) {
        Paragraph elements = new Paragraph(text, font);
        elements.setSpacingBefore(space);
        elements.setSpacingAfter(space);
//        elements.setSpacingAfter(spacing);
        return elements;
    }


    public static Font createFont(int fontNumber, int fontSize, BaseColor fontColor) {
        //中文字体 ----不然中文会乱码
        BaseFont bf = null;
        try {
            bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
            return new Font(bf, fontNumber, fontSize, fontColor);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return new Font(bf, Font.DEFAULTSIZE, Font.NORMAL, BaseColor.BLACK);
    }

    /**
     * 隐藏表格边框线
     *
     * @param cell 单元格
     */
    public static void disableBorderSide(PdfPCell cell) {
        if (cell != null) {
            cell.disableBorderSide(1);
            cell.disableBorderSide(2);
            cell.disableBorderSide(4);
            cell.disableBorderSide(8);
        }
    }


    /**
     * 创建居中得单元格
     *
     * @return
     */
    public static PdfPCell createCenterPdfPCell() {
        PdfPCell cell = new PdfPCell();
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(Element.ALIGN_CENTER);
        cell.setFixedHeight(fixedHeight);
        return cell;
    }

    /**
     * 创建指定文字得单元格
     *
     * @param text
     * @return
     */
    public static PdfPCell createCenterPdfPCell(String text, int rowSpan, int colSpan, Font font) {
        PdfPCell cell = new PdfPCell(new Paragraph(text, font));
        cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
        cell.setHorizontalAlignment(Element.ALIGN_LEFT);
        cell.setFixedHeight(fixedHeight);
        cell.setRowspan(rowSpan);
        cell.setColspan(colSpan);
        return cell;
    }

    /**
     * @param len 表格列数
     * @return
     */
    public static PdfPTable createPdfPTable(int len) {
        PdfPTable pdfPTable = new PdfPTable(len);
        pdfPTable.setSpacingBefore(5);
        pdfPTable.setHorizontalAlignment(Element.ALIGN_CENTER);
        return pdfPTable;
    }
}

3、controller下载类

@GetMapping("/exportPDF/{id}")
public void generatePDF(HttpServletResponse response,@PathVariable Long id) throws Exception {
    String filename = "测试pdf生成";
    // 设置下载格式为pdf
    response.setContentType("application/x-download");
    response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8") + ".pdf");
    cgddBzjService.generateCgddPDF(response);
}

4、service实现类

public void generateCgddPDF(HttpServletResponse response) throws IOException, DocumentException {
    OutputStream os = new BufferedOutputStream(response.getOutputStream());
    // 1. Document document = new Document();
    Document document = PdfUtil.createDocument();
    // 2. 获取writer
    PdfWriter.getInstance(document, os);
    // 3. open()
    document.open();

    //设置字体
    Font largeFont = PdfUtil.createFont(20, Font.NORMAL, BaseColor.BLACK);
    Font bigFont = PdfUtil.createFont(14, Font.NORMAL, BaseColor.BLACK);
    Font littleFont = PdfUtil.createFont(8, Font.NORMAL, BaseColor.BLACK);
    Font littleFontUnserline = PdfUtil.createFont(8, Font.UNDERLINE, BaseColor.BLACK);

    Paragraph title = PdfUtil.createParagraph("表头", largeFont,2);
    title.setAlignment(Element.ALIGN_CENTER);
    //定义数据的字体
    BaseFont baseFont = BaseFont.createFont("STSong-Light","UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
    Font textFont = new Font(baseFont, 6, Font.NORMAL);

    //定义表格
    PdfPTable sjtable = new PdfPTable(new float[] { 10,20,30,50,20,20,30,30,40,40});
    sjtable.setTotalWidth(555);
    sjtable.setLockedWidth(true);
    sjtable.setHorizontalAlignment(Element.ALIGN_CENTER);//居左

    PdfPCell heardCell = new PdfPCell();
    heardCell.setVerticalAlignment(Element.ALIGN_MIDDLE);
    heardCell.setHorizontalAlignment(Element.ALIGN_CENTER);
    heardCell.setPhrase(new Phrase("序号", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("品牌", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("品名", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("规格", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("单位", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("数量", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("单价", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("金额", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("工号", textFont));
    sjtable.addCell(heardCell);
    heardCell.setPhrase(new Phrase("货期", textFont));
    sjtable.addCell(heardCell);
    PdfPCell endvalue = new PdfPCell();
    endvalue.setFixedHeight(20f);
    endvalue.setColspan(2);
    endvalue.setPhrase(new Phrase("备注：", textFont));
    PdfPCell endvalue2 = new PdfPCell();
    endvalue2.setColspan(3);
    endvalue2.setPhrase(new Phrase("", textFont));
    PdfPCell endvalue3 = new PdfPCell();
    endvalue3.setColspan(2);
    endvalue3.setPhrase(new Phrase("合计（元）：", textFont));
    PdfPCell endvalue4 = new PdfPCell();
    endvalue4.setPhrase(new Phrase("", textFont));
    PdfPCell endvalue5 = new PdfPCell();
    endvalue5.setPhrase(new Phrase("", textFont));
    sjtable.addCell(endvalue);
    sjtable.addCell(endvalue2);
    sjtable.addCell(endvalue3);
    sjtable.addCell(endvalue4);
    sjtable.addCell(endvalue5);
    sjtable.addCell(endvalue5);


    // 4. 添加段落内容
    document.add(title);
    document.add(sjtable);
    // 5. close()
    document.close();
    os.close();
}