我正在使用以下代码的PDFBox:
doc = new PDDocument();
page = new PDPage();
doc.addPage(page);
PDFont font = PDType1Font.COURIER;
pdftitle = new PDPageContentStream(doc, page);
pdftitle.beginText();
pdftitle.setFont( font, 12 );
pdftitle.moveTextPositionByAmount( 40, 740 );
pdftitle.drawString("Here I insert a lot of text");
pdftitle.endText();
pdftitle.close();
有人知道我怎样才能让文本自动换行到下一行吗？
String[] wrT = null;
String s = null;
text = "Job Description: Lorem ipsum dolor sit amet, consectetur adipiscing elit. Pellentesque hendrerit lectus nec ipsum gravida placerat. Fusce eu erat orci. Nunc eget augue neque. Fusce arcu risus, pulvinar eu blandit ac, congue non tellus. Sed eu neque vitae dui placerat ultricies vel vitae mi. Vivamus vulputate nullam.";
wrT = WordUtils.wrap(text, 100).split("\\r?\\n");
for (int i=0; i< wrT.length; i++) {
contents.beginText();
contents.setFont(PDType1Font.HELVETICA, 10);
contents.newLineAtOffset(50,600-i*15);
s = wrT[i];
contents.showText(s);
contents.endText();
}
PdfBox和Boxable都会自动换行超过单元格宽度的文本部分，这意味着如果 单元格宽度=80， 句子宽度=100， 宽度为20的剩余文本部分将从下一行开始 （注意：我已经提到了宽度（句子实际占用的空间）而不是长度（字符数））
如果句子宽度=60， 需要宽度为20的文本来填充单元格的宽度，之后的任何文本都将进入下一行 解决方案：使用空格填充这个宽度20
单元格未填充的空间=单元格宽度-句子宽度， 空格的数量=单个空格的宽度/单元格未填充的空间
private String autoWrappedHeaderText(String text, float cellWidth) {
List<String> splitStrings = Arrays.asList(text.split("\n"));
String wholeString = "";
for (String sentence : splitStrings) {
float sentenceWidth = FontUtils.getStringWidth(headerCellTemplate.getFont(), " " + sentence + " ",
headerCellTemplate.getFontSize());
if (sentenceWidth < cellWidth) {
float spaceWidth = FontUtils.getStringWidth(headerCellTemplate.getFont(), " ",
headerCellTemplate.getFontSize());
int numberOfSpacesReq = (int) ((cellWidth - sentenceWidth) / spaceWidth);
wholeString += sentence;
for (int counter = 0; counter < numberOfSpacesReq; counter++) {
wholeString += " ";
}
}
}
return wholeString;
}
cell = headerRow.createCell(cellWidth * 100 / table.getWidth(), headerText, HorizontalAlignment.LEFT, VerticalAlignment.TOP);
我已经找到了pdfBOX中的换行问题的解决方案。
一般来说，您需要以下三个步骤来换行：
1) 将要换行的字符串中的每个单词拆分并放入一个字符串数组中，例如String [] parts
2) 创建一个字符串缓冲区数组，并将其划分为（textlength /（每行字符数）），例如280/70=5 >> 我们需要5个换行符！
3) 将部分内容放入stringbuffer [i]中，直到达到每行最大字符数的限制。
4) 循环，直到stringbuffer.length < linebreaks
splitString 方法是执行此操作的方法。 writeText 方法只是将换行文本绘制到pdf中。
这是一个示例：
import java.io.IOException;
import java.util.ArrayList;
import org.apache.pdfbox.exceptions.COSVisitorException;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.edit.PDPageContentStream;
import org.apache.pdfbox.pdmodel.font.PDFont;
import org.apache.pdfbox.pdmodel.font.PDType1Font;
public class pdfTest{
private ArrayList<String> arrayList;
private PDDocument document;
private PDFont font = PDType1Font.HELVETICA;
pdfTest(PDDocument document, ArrayList arrayList, PDFont font) throws COSVisitorException, IOException {
this.document = document;
this.arrayList = arrayList;
this.font = font;
writeText(document, arrayList, 30, 750, font); //method for easily drawing a text into a pdf
} //constructor
public void writeText(PDDocument document, ArrayList arrayList, int positionX, int positionY, PDFont font) throws IOException, COSVisitorException {
PDPage page = new PDPage();
document.addPage( page );
// Start a new content stream
PDPageContentStream contentStream = new PDPageContentStream(document, page);
// Define a text content stream using the selected font, moving the cursor and drawing the text in arrayList
for(int i=0;i<arrayList.size();i++) {
String text=(String) arrayList.get(i);
String [] tmpText = splitString(text);
for( int k=0;k<tmpText.length;k++) {
contentStream.beginText();
contentStream.setFont(font, 12);
contentStream.moveTextPositionByAmount(positionX, positionY);
contentStream.drawString(tmpText[k]);
contentStream.endText();
positionY=positionY-20;
}
contentStream.setLineWidth((float) 0.25);
}
// Make sure that the content stream is closed:
contentStream.close();
document.save( "Test.pdf");
document.close();
} //main
public static void main(String[] args) throws COSVisitorException, IOException {
ArrayList arrayList = new ArrayList<String>();
PDDocument document = new PDDocument();
PDFont font = PDType1Font.HELVETICA;
PDPage page = new PDPage();
arrayList.add( "12345 56789 0 aaa bbbew wel kwäer kweork merkweporkm roer wer wer e er"
+ "df sdmfkl slkdfm sdkfdof sopdkfp osdkfo sädölf söldm,f sdkfpoekr re, ä"
+ " sdfk msdlkfmsdlk fsdlkfnsdlk fnlkdn flksdnfkl sdnlkfn kln df sdmfn sn END");
arrayList.add("this is an example");
arrayList.add("java pdfbox stackoverflow");
new pdfTest(document,arrayList,font);
System.out.println("pdf created!");
}
public String [] splitString(String text) {
/* pdfBox doesnt support linebreaks. Therefore, following steps are requierd to automatically put linebreaks in the pdf
* 1) split each word in string that has to be linefeded and put them into an array of string, e.g. String [] parts
* 2) create an array of stringbuffer with (textlength/(number of characters in a line)), e.g. 280/70=5 >> we need 5 linebreaks!
* 3) put the parts into the stringbuffer[i], until the limit of maximum number of characters in a line is allowed,
* 4) loop until stringbuffer.length < linebreaks
*
*/
int linebreaks=text.length()/80; //how many linebreaks do I need?
String [] newText = new String[linebreaks+1];
String tmpText = text;
String [] parts = tmpText.split(" "); //save each word into an array-element
//split each word in String into a an array of String text.
StringBuffer [] stringBuffer = new StringBuffer[linebreaks+1]; //StringBuffer is necessary because of manipulating text
int i=0; //initialize counter
int totalTextLength=0;
for(int k=0; k<linebreaks+1;k++) {
stringBuffer[k] = new StringBuffer();
while(true) {
if (i>=parts.length) break; //avoid NullPointerException
totalTextLength=totalTextLength+parts[i].length(); //count each word in String
if (totalTextLength>80) break; //put each word in a stringbuffer until string length is >80
stringBuffer[k].append(parts[i]);
stringBuffer[k].append(" ");
i++;
}
//reset counter, save linebreaked text into the array, finally convert it to a string
totalTextLength=0;
newText[k] = stringBuffer[k].toString();
}
return newText;
}
}