JAVA开发 PDF文件生成表格，表格根据内容自动调整高度

1、展示效果

在这里插入图片描述

2、相关功能实现

JAVA开发使用Apache PDFBox库生成PDF文件，绘制表格

3、实现代码

import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDType0Font;
import org.apache.pdfbox.pdmodel.font.PDType1Font;import java.io.File;
import java.io.IOException;import java.text.SimpleDateFormat;
import java.util.Date;public class TableInPDFBox {private static final int WARPNUM  = 11;   //每行显示的字符数量，一个中文占一个字符，其他字符占0.5个//判断输入的字符是不是中文public static boolean isChineseChar(char ch) {String regex = "[\u4E00-\u9FA5]";String charToCheck = String.valueOf(ch);return charToCheck.matches(regex);}//每行显示的字符数量，获取每个字符串所需要的行数public static  int GetWarpRowByString(String str){float sum = 0 ;   //sum 用来计算中文字符int row = 0,index=0;char[] tempArr = str.toCharArray();for(int i = 0;i<tempArr.length;i++){if(isChineseChar(tempArr[i])){sum +=1;}else{sum +=0.5f;}if(sum == WARPNUM){row++;sum=0;}else if(sum>WARPNUM){i--;row++;sum = 0;}else{}}row = row +1;return row;}//根据每行的内容，获取最大需要换行的行数（只比较爱好、优势两列）public static int[] ConfirmRowLength(String[][] stu,int index){int[] MaxlengthArr = new int[stu.length];MaxlengthArr[0] = 1;for(int i = 1;i<stu.length;i++){int max = GetWarpRowByString(stu[i][0]);for(int j=index;j<stu[i].length;j++){int strRow = GetWarpRowByString(stu[i][j]);if(strRow>max){max = strRow;}}MaxlengthArr[i] = max;}return MaxlengthArr;}//将字符串按照最大每行显示数进行分割，保存到字符串数组中public static String[] GetWarpStr(int rowLength,String str){float sum = 0.0f;String[] returnStr=new String[rowLength];int returnIndex = 0;String temp="";char[] strArr = str.toCharArray();for(int i= 0;i<strArr.length;i++){if(isChineseChar(strArr[i])){sum = sum + 1.0f;}else{sum+=0.5f;}temp = temp + strArr[i];if(sum == WARPNUM){returnStr[returnIndex++]= temp;temp = "";sum = 0.0f;}else if(sum >= WARPNUM){returnStr[returnIndex++]= temp.substring(0,temp.length()-1);i--;temp = "";sum = 0.0f;}else{}}if(!temp.isEmpty() && returnIndex<rowLength){returnStr[returnIndex++] = temp;}return returnStr;}public static void main(String[] args) {PDDocument document = null;String[][] stuData = new String[][]{{"姓名","工号","部门","爱好","优势"},{"张三丰","WD0001","武当派","阅读让我们获得知识和灵感，运动可以让我们保持身体健康。阅读让我们获得知识和灵感，运动可以让我们保持身体健康。阅读让我们获得知识和灵感，运动可以让我们保持身体健康。阅读让我们获得知识和灵感，运动可以让我们保持身体健康。","武当派和三丰派的祖师，会少林武功和九阳真经，武功特点是阴阳互融、刚柔并济，达到了武学的巅峰。真是泰裤辣。武功特点是阴阳互融、刚柔并济，达到了武学的巅峰。真是泰裤辣"},{"郭  襄","EM0001","峨嵋派","书法有助于修养身心,陶冶情操,既练习了字,也可以修炼沉稳的性格.书法有助于修养身心,陶冶情操,既练习了字,也可以修炼沉稳的性格。","会峨眉九阳功，擅长黄药师最精妙的剑法之一的落英剑法。"}};try {int[] lengthArr = ConfirmRowLength(stuData,3);float[] rowIndxArr = new float[stuData.length+1];float[] colIndxArr = new float[stuData[0].length+1];document = new PDDocument();PDPage page = new PDPage();document.addPage(page);PDPageContentStream contentStream = new PDPageContentStream(document, page);Date date = new Date();SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HHmmss");String dateFormat = sdf.format(date);// 表格参数int rows = 3;int cols = 5;float cellWidth1 = 60 , cellWidth2 = 150;float cellHeight = 30;float xStart = 30,xEnd = xStart + 3 * cellWidth1+2*cellWidth2;       //横向开始线的x点，横向结束线的x点float yStart = 700,yEnd = 0;   //纵向开始线的y点，纵向结束线的y点float sumRows = cellHeight;// 绘制表格x轴线for (int i = 0; i <= rows; i++) {float rowY =0;if(i == 0){rowY = yStart - i * cellHeight;}else{sumRows =  sumRows +lengthArr[i-1]*10+5*2;rowY = yStart - sumRows;yEnd = rowY;}rowIndxArr[i] = rowY;contentStream.moveTo(xStart, rowY);contentStream.lineTo(xEnd, rowY);contentStream.stroke();}//绘制表格y轴线for (int j = 0; j <= cols; j++) {float colX;if(j<=3){colX= xStart + j * cellWidth1;}else{colX = xStart +3*cellWidth1 +(j-3)*cellWidth2;}colIndxArr[j] = colX;contentStream.moveTo(colX, yStart);contentStream.lineTo(colX, yEnd);contentStream.stroke();}// 填写表格内容File fontFile = new File("C:\\Windows\\Fonts\\SIMLI.TTF"); // 字体文件路径PDType0Font font = PDType0Font.load(document, fontFile);for (int i = 0; i < rows; i++) {for (int j = 0; j < cols; j++) {String text = stuData[i][j];String[] rowText = GetWarpStr(lengthArr[i],text);for(int k = 0;k<rowText.length && rowText[k]!=null;k++){contentStream.beginText();contentStream.setFont(font, 12);contentStream.newLineAtOffset(colIndxArr[j]+5, rowIndxArr[i]-10-10*k);contentStream.showText(rowText[k]);contentStream.endText();}}}contentStream.close(); // 关闭内容流// 保存PDFdocument.save("D:\\JAVAFILE\\attachments\\pdfs\\" + dateFormat + "  table.pdf");} catch (IOException e) {e.printStackTrace();} finally {if (document != null) {try {document.close(); // 关闭文档} catch (IOException e) {e.printStackTrace();}}}}
}