Java iText导出pdf功能实现

ava使用itext组件导出pdf报表,导出pdf文件一般是系统中常支持的功能,输出pdf之后可以打印,下面介绍导出pdf一般使用的功能,介绍怎么 在pdf插入浮动层图片(类似HTML中div),有(X、Y)坐标确定图片的位置。
iText使用的版本是:itextpdf-5.5.1.jar, 可以去iText官网下载

输出pdf表格

iText输出pdf最基本是输出table表格,下面是输出区域、总销售额(万元)、总利润(万元)简单的表格,创建Document文档对象,其可以加入表格table,pdf文档大小设置为A4,通过PdfWriter对象将pdf文件写入到输出流中。
getPdfChineseFont()方法解决中文乱码,需要加入itext-asian.jar

          

 

float[] widths = {144113191};

FileOutputStream fos = new FileOutputStream("/Users/mike/table1.pdf");

 

Document document = new Document();

PdfWriter writer = PdfWriter.getInstance(document, fos);

writer.setViewerPreferences(PdfWriter.PageModeUseThumbs);

document.setPageSize(PageSize.A4);//设置A4

document.open();

 

PdfPTable table = new PdfPTable(widths);

table.setTotalWidth(458);

table.setHorizontalAlignment(Element.ALIGN_LEFT);

 

Object[][] datas = {{"区域""总销售额(万元)""总利润(万元)简单的表格"}, {"江苏省" 9045,  2256}, {"广东省"3000690}};

for(int i = 0; i < datas.length; i++) {

    for(int j = 0; j < datas[i].length; j++) {

        PdfPCell pdfCell = new PdfPCell(); //表格的单元格

        Paragraph paragraph = new Paragraph(StringUtil.getString(datas[i][j]), getPdfChineseFont());

        pdfCell.setPhrase(paragraph);

        table.addCell(pdfCell);

    }

}

 

document.add(table); //pdf文档中加入table

document.close();

 

public static Font getPdfChineseFont() throws Exception {

    BaseFont bfChinese = BaseFont.createFont("STSongStd-Light""UniGB-UCS2-H",

            BaseFont.NOT_EMBEDDED);

    Font fontChinese = new Font(bfChinese, 12, Font.NORMAL);

    return fontChinese;

}

设置表格行高、列宽

有时单元格文本比较多,需要设置表格的列宽度,在初始化PdfTable可以指定每列的宽度,使用单元格对象PdfCell设置表格行高度,
table的setLockedWidth(true)方法设置表格为固定宽度,这时必须设置setTotalWidth(458)表格宽度

          Java iText导出pdf功能实现_第1张图片

 

FileOutputStream fos = new FileOutputStream("/Users/mike/table2.pdf");

Document document = new Document();

PdfWriter writer = PdfWriter.getInstance(document, fos);

writer.setViewerPreferences(PdfWriter.PageModeUseThumbs);

document.setPageSize(PageSize.A4);

document.open();

 

float[] widths = {144113191}; //设置三列表格的宽度

PdfPTable table = new PdfPTable(widths);

table.setLockedWidth(true);

table.setTotalWidth(458);

table.setHorizontalAlignment(Element.ALIGN_LEFT);

 

Object[][] datas = {{"区域""总销售额(万元)""总利润(万元)简单的表格"}, {"江苏省" 9045,  2256}, {"广东省"3000690}};

for(int i = 0; i < datas.length; i++) {

    for(int j = 0; j < datas[i].length; j++) {

        PdfPCell pdfCell = new PdfPCell();

        pdfCell.setMinimumHeight(30);//设置表格行高

        Paragraph paragraph = new Paragraph(StringUtil.getString(datas[i][j]), getPdfChineseFont());

        pdfCell.setPhrase(paragraph);

        table.addCell(pdfCell);

    }

}

 

document.add(table);

document.close();

设置pdf单元格样式

单元格可以设置居左、居中、居右、上下居中、设置边框、设置边框颜色、设置单元格背景颜色等, 使用PdfCell对象设置,颜色比比较简单直接时16进制rgb值。

          Java iText导出pdf功能实现_第2张图片

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pdfCell.setHorizontalAlignment(Element.ALIGN_CENTER);

pdfCell.setVerticalAlignment(Element.ALIGN_MIDDLE);

pdfCell.setBackgroundColor(new BaseColor(0xdd7e6b));

 

pdfCell.setBorderWidthTop(0.1f);

pdfCell.setBorderWidthBottom(0.1f);

pdfCell.setBorderWidthLeft(0.1f);

pdfCell.setBorderWidthRight(0.1f);

pdfCell.setBorderColorBottom(new BaseColor(0x674ea7));

pdfCell.setBorderColorLeft(new BaseColor(0x674ea7));

pdfCell.setBorderColorRight(new BaseColor(0x674ea7));

pdfCell.setBorderColorTop(new BaseColor(0x674ea7));

单元格文本设置字体样式

单元格文本可设置字体大小、颜色、斜体、粗体、下划线等,对于设置字体粗体、斜体、下划线则都使用font.setStyle()方法,
这个font是com.itextpdf.text.Font不是Java的Font, setStyle方法内部会做或操作。

          Java iText导出pdf功能实现_第3张图片

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Font font = getPdfChineseFont();

 

font.setColor(new BaseColor(0xff0000));

font.setSize(16);

font.setStyle("bold");

font.setStyle("italic");

font.setStyle("underline");

 

public static Font getPdfChineseFont() throws Exception {

    BaseFont bfChinese = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H",

            BaseFont.NOT_EMBEDDED);

    Font fontChinese = new Font(bfChinese, 12, Font.NORMAL);

    return fontChinese;

}

合并单元格

PdfCell做单元格合并比较简单,直接调用setRowspan与setColspan方法,
如下第一行3列合并, 被合并的单元格不需要加入table中(table.addCell(pdfCell)),否则会出现表格错乱的情况。

          Java iText导出pdf功能实现_第4张图片

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pdfCell.setRowspan(1);

pdfCell.setColspan(3);

单元格中加入图片

单元格中不仅是文本、数值、也可以加入图片,直接调用pdfCell.setImage()方法。

          Java iText导出pdf功能实现_第5张图片

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//单元格插入图片

byte[] bt = FileUtils.readFileToByteArray(new File("/Users/mike/pie.png"));

PdfPCell pdfCell = new PdfPCell();

pdfCell.setImage(Image.getInstance(bt));//插入图片

table.addCell(pdfCell);

table.addCell(new PdfPCell());

table.addCell(new PdfPCell());

 

ClientAnchor anchor = helper.createClientAnchor();

anchor.setCol1(0); //图片开始列数

anchor.setRow1(4); //图片开始行数

anchor.setCol2(3); //图片结束列数

anchor.setRow2(25);//图片结束行数

drawing.createPicture(anchor, pictureIdx);

pdf中插入浮动层图片类似html中div

pdf中插入图片, iText导出pdf可以根据绝对位置X、Y坐标值插入图片,然后将image加入到pdf文档document中,上面的例子是document中加入表格table, pdf文档开始坐标位置在左下角位置,所以使用document的高度(PageSize.A4.getHeight())减去y值和图片自身高度.

          Java iText导出pdf功能实现_第6张图片

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//文档插入绝对位置图片

Image image = Image.getInstance(bt);

int x = 30;

int y = 230;

image.setAbsolutePosition(x + document.leftMargin(),  PageSize.A4.getHeight() - y -

        image.getHeight() - document.topMargin());

document.add(image);

pdf单元格中插入子表格

pdf表格中可以加入子表格,通过pdfCell.addElement(suTtable)方法加入(sub1、sub2)子表格

          Java iText导出pdf功能实现_第7张图片

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//插入子表格

pdfCell = new PdfPCell();

pdfCell.setRowspan(1);

pdfCell.setColspan(2);

 

PdfPTable suTtable = new PdfPTable(new float[]{100,100});

PdfPCell subPdfCell = new PdfPCell();

subPdfCell.setPhrase(new Paragraph("sub1", getPdfChineseFont()));

suTtable.addCell(subPdfCell);

subPdfCell = new PdfPCell(); 

subPdfCell.setPhrase(new Paragraph("sub2", getPdfChineseFont()));

suTtable.addCell(subPdfCell);

 

pdfCell.addElement(suTtable);//添加子表格

table.addCell(pdfCell);

单元格中画斜线

iText pdf单元格中画斜线另一篇有详细介绍:iText报表表格画斜线

完整例子

iText导出pdf例子

import java.io.File;

import java.io.FileOutputStream;

 

import org.apache.commons.io.FileUtils;

 

import com.itextpdf.text.BaseColor;

import com.itextpdf.text.Document;

import com.itextpdf.text.Element;

import com.itextpdf.text.Font;

import com.itextpdf.text.Image;

import com.itextpdf.text.PageSize;

import com.itextpdf.text.Paragraph;

import com.itextpdf.text.pdf.BaseFont;

import com.itextpdf.text.pdf.PdfPCell;

import com.itextpdf.text.pdf.PdfPTable;

import com.itextpdf.text.pdf.PdfWriter;

 

import cn.cztc.jreport.util.StringUtil;

 

public class TestExportPdf {

 

    public static void main(String[] args) throws Exception {

        

        FileOutputStream fos = new FileOutputStream("/Users/mike/table8.pdf");

        Document document = new Document();

        PdfWriter writer = PdfWriter.getInstance(document, fos);

        writer.setViewerPreferences(PdfWriter.PageModeUseThumbs);

        document.setPageSize(PageSize.A4);

        document.open();

         

        float[] widths = {144113191};

        PdfPTable table = new PdfPTable(widths);

        table.setLockedWidth(true);

        table.setTotalWidth(458);

        table.setHorizontalAlignment(Element.ALIGN_LEFT);

         

        Object[][] datas = {{"区域产品销售额"},{"区域""总销售额(万元)""总利润(万元)简单的表格"}, {"江苏省" 9045,  2256}, {"广东省"3000690}};

        for(int i = 0; i < datas.length; i++) {

            for(int j = 0; j < datas[i].length; j++) {

                PdfPCell pdfCell = new PdfPCell();

                pdfCell.setMinimumHeight(30);

                 

                //设置单元格样式

                pdfCell.setHorizontalAlignment(Element.ALIGN_CENTER);

                pdfCell.setVerticalAlignment(Element.ALIGN_MIDDLE);

                pdfCell.setBackgroundColor(new BaseColor(0xdd7e6b));

                 

                pdfCell.setBorder(0);

                pdfCell.setBorderWidthTop(0.1f);

                pdfCell.setBorderWidthBottom(0.1f);

                pdfCell.setBorderWidthLeft(0.1f);

                pdfCell.setBorderWidthRight(0.1f);

                pdfCell.setBorderColorBottom(new BaseColor(0x674ea7));

                pdfCell.setBorderColorLeft(new BaseColor(0x674ea7));

                pdfCell.setBorderColorRight(new BaseColor(0x674ea7));

                pdfCell.setBorderColorTop(new BaseColor(0x674ea7));

                 

                //设置单元格文本字体样式

                Font font = getPdfChineseFont();

                if(i == datas.length - 1 && j == 3 1) {

                    font.setColor(new BaseColor(0xff0000));

                    font.setSize(16);

                    font.setStyle("bold");

                    font.setStyle("italic");

                    font.setStyle("underline");

                }

                 

                //合并单元格

                if(i == 0 && j == 0) {

                    pdfCell.setRowspan(1);

                    pdfCell.setColspan(3);

                }

                 

                Paragraph paragraph = new Paragraph(StringUtil.getString(datas[i][j]), font);

                pdfCell.setPhrase(paragraph);

                                 

                table.addCell(pdfCell);

            }

        }

         

        //单元格插入图片

        byte[] bt = FileUtils.readFileToByteArray(new File("/Users/mike/pie.png"));

        PdfPCell pdfCell = new PdfPCell();

        pdfCell.setImage(Image.getInstance(bt));

        table.addCell(pdfCell);

         

        //插入子表格

        pdfCell = new PdfPCell();

        pdfCell.setRowspan(1);

        pdfCell.setColspan(2);

         

        PdfPTable suTtable = new PdfPTable(new float[]{100100});

        PdfPCell subPdfCell = new PdfPCell();

        subPdfCell.setPhrase(new Paragraph("sub1", getPdfChineseFont()));

        suTtable.addCell(subPdfCell);

        subPdfCell = new PdfPCell(); 

        subPdfCell.setPhrase(new Paragraph("sub2", getPdfChineseFont()));

        suTtable.addCell(subPdfCell);

         

        pdfCell.addElement(suTtable);

        table.addCell(pdfCell);

    

        document.add(table);

         

        //文档插入绝对位置图片

        Image image = Image.getInstance(bt);

        int x = 30;

        int y = 230;

        image.setAbsolutePosition(x + document.leftMargin(),  PageSize.A4.getHeight() - y -

                image.getHeight() - document.topMargin());

        document.add(image);

         

        document.close();

    }

 

    public static Font getPdfChineseFont() throws Exception {

        BaseFont bfChinese = BaseFont.createFont("STSongStd-Light""UniGB-UCS2-H",

                BaseFont.NOT_EMBEDDED);

        Font fontChinese = new Font(bfChinese, 12, Font.NORMAL);

        return fontChinese;

    }

}

 

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