我与iText librarie合作,以创建并操作PDF文档。 让我们有一个文档,其中包含一个简单的字符串,如“Hello world”。 所以在pdf文件结构中,我们必须有(Hello world)Tj。 问题是我如何通过使用java代码为每个角色设置位置(我们也可以谈谈TJ运算符)。 我保证他/她帮助我并给我想法的人,我会把他/她的名字作为参考我的项目:)
任何回答的答案:)
致以最诚挚的问候,
答案 0 :(得分:1)
问题是如何使用java代码
为每个角色设置位置
使用iText,您可以使用PdfContentByte.
的文本定位和显示方法轻松定位任何文本片段(包括单个字符)。如果要包装该功能,可以使用这样的辅助类:
public class ContentWriter
{
public ContentWriter(PdfContentByte content) throws DocumentException, IOException
{
this.content = content;
BaseFont bf = BaseFont.createFont();
content.beginText();
content.setFontAndSize(bf, 12);
}
// x and y are offsets relative to the start coordinates of the most recent write call
public ContentWriter write(float x, float y, String text)
{
if (finished)
throw new IllegalStateException("ContentWritr session already finished.");
content.moveText(x, y);
content.showText(text);
return this;
}
public void finish()
{
if (!finished)
{
content.endText();
finished = true;
}
}
final PdfContentByte content;
boolean finished = false;
}
可以像这样使用:
public void testShowSomePositionedContent() throws DocumentException, IOException
{
Document document = new Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("positionedContent.pdf"));
document.open();
PdfContentByte cb = writer.getDirectContent();
new ContentWriter(cb).
write(100, 400, "A").
write(20, 0, "B").
write(18, 2, "C").
write(10, 7, "D").
finish();
document.close();
}
此示例代码创建了这个:
您还谈到了PDF操作员,您可能会对PDF本身的外观感兴趣:
BT
/F1 12 Tf
100 400 Td
(A)Tj
20 0 Td
(B)Tj
18 2 Td
(C)Tj
10 7 Td
(D)Tj
ET
由于ContentWriter
助手类只需要PdfContentByte
个实例,因此它也可以与PdfStamper.
答案 1 :(得分:0)
public static void CreatePdf(String src){
Rectangle rec= new Rectangle(400,400);
Document doc= new Document(rec);
PdfWriter writer= PdfWriter.getInstance(doc,nweFileOutputStream("doc.pdf"));
PdfContentByte content=writer.getDirectContent();
doc.open();
BaseFont bf=BaseFont.createFont();
String texte="hello";
content.setCharacterSpacing((float)2.5);
content.setFontAndSize(bf,12);
content.beginText();
content.showText(texte);
content.endText();
document.close();
}
public static void ManipulatePdf(String src, String dest){
PdfReader read= new PdfReader("doc.pdf");
PdfStamper stamper= new PdfStamper(read,new FileOutPutStream("doc_modifie.pdf"));
PdfContentByte canvas= stamper.getUnderContent(1);
canvas.setFontAndSize(bf,12);
canvas.setCharacterSpacing((float)6);
canvas.beginText();
canvas.showText(texte);
canvas.endText();
stamper.close();
//now how to modify the character spacing to 6 for example and then replace the modified //string instead of the old string in the document
}
}
答案 2 :(得分:0)
public void ManipulatePdf(String src,String dest){ PdfReader read = new PdfReader(“document.pdf”); PdfStamper压模=新的PdfStamper(读取,新的FileOutputStream(“document_modifié.pdf”));
PdfContentByte content= stamper.getUnderContent(1);
LocationTextExtractionStrategy lteStrategy = new LocationTextExtractionStrategy();
String texte= PdfTextExtractor.getTextFromPage(read, 1, lteStrategy);
pdflayer= new PdfLayer("Overrite", stamper.getWriter());
content.setColorFill(BaseColor.BLACK);
content.beginLayer(pdflayer);
content.fill();
PdfGState pgState = new PdfGState();
content.setGState(pgState);
content.setColorFill(BaseColor.WHITE);
content.setCharacterSpacing((float)6);
content.beginText();
content.setTextMatrix(15, 385);
content.showText("hello");
content.endText();
content.endLayer();
stamper.close();
read.close();
}