Java用iText5生成PDF

灰太狼 2021-07-25 01:03 588阅读 0赞

jar包：itext-asian-5.2.0.jar itextpdf-5.5.5.jar itext-1.4.6.jar

## [Java用iText5操作PDF itext-asian-5.2.0.jar itextpdf-5.5.5.jar itext-1.4.6.jar][Java_iText5_PDF itext-asian-5.2.0.jar itextpdf-5.5.5.jar itext-1.4.6.jar] ##

## 说明 ##

### 新建document对象 ###

1.  Document document =new Document(); // 默认页面大小是A4
2.  Document document =new Document(PageSize.A4); // 指定页面大小为A4
3.  Document document =new Document(PageSize.A4,50,50,30,20); // 指定页面大小为A4，且自定义页边距

### PdfWriter 对象进行磁盘写入操作 ###

PdfWriter.getInstance(document, new FileOutputStream(filePath));

### 打开文档 ###

document.open();

### 向文档中添加内容 ###

document.add();

### 关闭文档 ###

document.close();

### 段落Paragraph ###

Paragraph pt=new Paragraph(name,headfont);//设置字体样式

pt.setAlignment(1);//设置文字居中 0靠左 1，居中 2，靠右

pt.setIndentationLeft(12);// 左缩进

pt.setIndentationRight(12);// 右缩进

pt.setFirstLineIndent(24);// 首行缩进

paragraph.setLeading(20f); //行间距

paragraph.setSpacingBefore(5f); //设置段落上空白

paragraph.setSpacingAfter(10f); //设置段落下空白

### 表格table ###

Table table =new Table(4);//括号参数表示列  
      int width\[\] = \{10,40,40\};//设置每列宽度比例

table.setWidths(width);

table.setWidth(60);//占页面宽度比例

table.setAlignment(Element.ALIGN\_LEFT);//居左

table.setAutoFillEmptyCells(true);//自动填满

table.setBorderWidth((float)0.1);//表格边框线条宽度

table.setPadding(1);//边距:单元格的边线与单元格内容的边距

table.setSpacing(0);//间距：单元格与单元格之间的距离

table.addCell(new Paragraph("name"),"单元格"));//添加单元格内容

table.endHeaders();//每页都会显示表头

## 实例 ##

### 生成一个只有标题的pdf ###

import java.io.FileOutputStream;
    import com.itextpdf.text.BaseColor;
    import com.itextpdf.text.Chapter;
    import com.itextpdf.text.Document;
    import com.itextpdf.text.Font;
    import com.itextpdf.text.PageSize;
    import com.itextpdf.text.Paragraph;
    import com.itextpdf.text.pdf.BaseFont;
    import com.itextpdf.text.pdf.PdfWriter;
    
    public class PdfJava
    {
    
       public void pdfTest(String filePath) throws Exception
       {
          Document document = new Document(PageSize.A4, 36, 36, 36, 36);
          PdfWriter.getInstance(document, new FileOutputStream(filePath));
    
          document.open();
    
          
          //中文字体,解决中文不能显示问题
          BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.EMBEDDED);
          Font cusTitleFont = new Font(bfChinese);
          cusTitleFont.setSize(16);
    
          Font cusFont = new Font(bfChinese);
          cusFont.setSize(9);
    
          //添加标题开始
          Font redFont = new Font(bfChinese);
          redFont.setColor(BaseColor.RED);//设置颜色
          redFont.setSize(20);//设置字体大小
          Paragraph chapterTitle = new Paragraph("java生成pdf文件", redFont);//设置内容
          chapterTitle.setAlignment(1);
    
          Chapter chapter1 = new Chapter(chapterTitle, 1);
          chapter1.setNumberDepth(0);
    
          document.add(chapter1);
          //添加标题结束
          
          //关闭文档
          document.close();
          
       }
    
       /**
        * @param args
        */
       public static void main(String[] args)
       {
          try
          {
             String filePath="d:\\test1.pdf";
             new PdfJava().pdfTest(filePath);
          }
          catch (Exception e)
          {
             e.printStackTrace();
          }
    
       }
    
    }

文件如下：

![20210312173328542.png][]

### 生成table内容 ###

import java.io.FileOutputStream;
    import java.util.List;
    
    import com.itextpdf.text.BaseColor;
    import com.itextpdf.text.Chapter;
    import com.itextpdf.text.Document;
    import com.itextpdf.text.Element;
    import com.itextpdf.text.Font;
    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.PdfPRow;
    import com.itextpdf.text.pdf.PdfPTable;
    import com.itextpdf.text.pdf.PdfWriter;
    
    public class PdfJava
    {
    
       public void pdfTest(String filePath) throws Exception
       {
          Document document = new Document(PageSize.A4, 36, 36, 36, 36);
          PdfWriter.getInstance(document, new FileOutputStream(filePath));
    
          document.open();
    
          
          //中文字体,解决中文不能显示问题
          BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.EMBEDDED);
          Font cusTitleFont = new Font(bfChinese);
          cusTitleFont.setSize(16);
    
          Font cusFont = new Font(bfChinese);
          cusFont.setSize(9);
    
          //添加标题开始
          Font redFont = new Font(bfChinese);
          redFont.setColor(BaseColor.RED);//设置颜色
          redFont.setSize(20);//设置字体大小
          Paragraph chapterTitle = new Paragraph("java生成pdf文件", redFont);//设置内容
          chapterTitle.setAlignment(1);
    
          Chapter chapter1 = new Chapter(chapterTitle, 1);
          chapter1.setNumberDepth(0);
    
          document.add(chapter1);
          //添加标题结束
          
          
        //添加一个内容段落
          document.add(new Paragraph("表格信息", cusTitleFont));
          // 表格.
          PdfPTable table = new PdfPTable(6);
          table.setWidthPercentage(100); // 宽度100%填充
          table.setSpacingBefore(10f); // 前间距
          table.setSpacingAfter(10f); // 后间距
    
          List<PdfPRow> listRow = table.getRows();
          //设置列宽
          float[] columnWidths = { 2f, 2f, 2f ,2f, 2f, 2f};
          table.setWidths(columnWidths);
    
          //行
          PdfPCell cells1[] = new PdfPCell[6];
          PdfPRow row1 = new PdfPRow(cells1);
    
          //单元格
          cells1[0] = new PdfPCell(new Paragraph("第一行第1列：", cusFont));//单元格内容
          cells1[0].setHorizontalAlignment(Element.ALIGN_RIGHT);//水平居右
    
          cells1[1] = new PdfPCell(new Paragraph("第一行第1列值", cusFont));
          cells1[1].setHorizontalAlignment(Element.ALIGN_LEFT);//水平居左
          
          cells1[2] = new PdfPCell(new Paragraph("第一行第2列：", cusFont));//单元格内容
          cells1[2].setHorizontalAlignment(Element.ALIGN_RIGHT);//水平居右
    
          cells1[3] = new PdfPCell(new Paragraph("第一行第2列值", cusFont));
          cells1[3].setHorizontalAlignment(Element.ALIGN_LEFT);//水平居左
          
          cells1[4] = new PdfPCell(new Paragraph("第一行第3列：", cusFont));//单元格内容
          cells1[4].setHorizontalAlignment(Element.ALIGN_RIGHT);//水平居右
    
          cells1[5] = new PdfPCell(new Paragraph("第一行第3列值", cusFont));
          cells1[5].setHorizontalAlignment(Element.ALIGN_LEFT);//水平居左
          //把第一行添加到集合
          listRow.add(row1);
          
        //行
          PdfPCell cells2[] = new PdfPCell[6];
          PdfPRow row2 = new PdfPRow(cells2);
    
          //单元格
          cells2[0] = new PdfPCell(new Paragraph("第二行第1列：", cusFont));//单元格内容
          cells2[0].setHorizontalAlignment(Element.ALIGN_RIGHT);//水平居右
    
          cells2[1] = new PdfPCell(new Paragraph("第二行第1列值", cusFont));
          cells2[1].setHorizontalAlignment(Element.ALIGN_LEFT);//水平居左
          
          cells2[2] = new PdfPCell(new Paragraph("第二行第2列：", cusFont));//单元格内容
          cells2[2].setHorizontalAlignment(Element.ALIGN_RIGHT);//水平居右
    
          cells2[3] = new PdfPCell(new Paragraph("第二行第2列值", cusFont));
          cells2[3].setHorizontalAlignment(Element.ALIGN_LEFT);//水平居左
          
          cells2[4] = new PdfPCell(new Paragraph("第二行第3列：", cusFont));//单元格内容
          cells2[4].setHorizontalAlignment(Element.ALIGN_RIGHT);//水平居右
    
          cells2[5] = new PdfPCell(new Paragraph("第二行第3列值", cusFont));
          cells2[5].setHorizontalAlignment(Element.ALIGN_LEFT);//水平居左
          //把第二行添加到集合
          listRow.add(row2);
          
          //把表格添加到文件中
          document.add(table);
          
          //关闭文档
          document.close();
          
       }
    
       /**
        * @param args
        */
       public static void main(String[] args)
       {
          try
          {
             String filePath="d:\\test1.pdf";
             new PdfJava().pdfTest(filePath);
          }
          catch (Exception e)
          {
             e.printStackTrace();
          }
    
       }
    
    }

文件如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RrbTEyMzQ1Ng_size_16_color_FFFFFF_t_70][]

### 加入公章（图片） ###

Image image1 = Image.getInstance("d:\\gongzhang.jpg");
          //设置图片位置的x轴和y轴
          image1.setAbsolutePosition(100, 500);//注意是从文档的坐下角往右、往上计算的
          //设置图片的宽度和高度
          image1.scaleAbsolute(100, 100);
          //将图片1添加到pdf文件中
          document.add(image1);

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RrbTEyMzQ1Ng_size_16_color_FFFFFF_t_70 1][]

### 加入作者信息 ###

//Anchor对象: internal and external links  
          Paragraph country = new Paragraph();  
          Anchor dest = new Anchor("china", new Font(Font.FontFamily.HELVETICA, 14, Font.BOLD, BaseColor.BLUE));  
          dest.setName("CN");  
          dest.setReference("http://www.china.com");//external  
          country.add(dest);  
          country.add(String.format(": %d sites", 10000));  
          document.add(country);

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RrbTEyMzQ1Ng_size_16_color_FFFFFF_t_70 2][]

### 加入跳转到指定位置（点击跳转） ###

document.newPage();  
          Anchor toUS = new Anchor("Go to first page.", new Font(Font.FontFamily.HELVETICA, 14, Font.BOLD, BaseColor.BLUE));  
          toUS.setReference("#CN");//internal  
          document.add(toUS);

### **HTML to PDF**  ###

![20210312182538676.png][]

### [Java用iText5操作PDF代码及相关jar下载][Java_iText5_PDF itext-asian-5.2.0.jar itextpdf-5.5.5.jar itext-1.4.6.jar] ###

[Java_iText5_PDF itext-asian-5.2.0.jar itextpdf-5.5.5.jar itext-1.4.6.jar]: https://download.csdn.net/download/dkm123456/15747133
[20210312173328542.png]: /images/20210724/6f2e5335cd2b4a61afc7ca50212e4d8e.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RrbTEyMzQ1Ng_size_16_color_FFFFFF_t_70]: /images/20210724/d173710887cd4e68a82963718b0fcde8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RrbTEyMzQ1Ng_size_16_color_FFFFFF_t_70 1]: /images/20210724/605483c5b5254423a7b86b3e3435bfc4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2RrbTEyMzQ1Ng_size_16_color_FFFFFF_t_70 2]: /images/20210724/db9d18e44efd498987f82b363d8475f4.png
[20210312182538676.png]: /images/20210724/e46f8e541ed4480f99b5af4da3c924b4.png