Itext从现有的pdf获取字段坐标 [英] Itext get field coordinates from existing pdf
问题描述
首先,我不是Java开发人员:(我只需要一个小程序,它将通过现有pdf文件中的字段名输出到我的字段坐标,当我从命令行调用我的类时,我将输入,类似这样的事情:
First of All, I'm not Java Developer:( I just need small programm, that will output to me coordinates of field by field name from existing pdf file, that I will type when I call my class from command line, something like this:
javac GetField.java
java GetField <myForm.pdf>, <myFieldName>
我在我的服务器上使用itext。现在我正在尝试运行简单的代码:
I'm using itext on my server. Now I'm trying to run simple code:
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import java.io.*;
import java.util.*;
import java.awt.List;
class HelloWorld{
public static void main(String[] args) throws IOException {
PdfReader reader = new PdfReader("Noname.pdf");
AcroFields fields = reader.getAcroFields();
float[] positions = fields.getFieldPositions("Signature");
System.out.println( positions );
}
}
但我知道ve错误:类型不匹配:无法从List转换为float []。
当我替换
But I have error: "Type mismatch: cannot convert from List to float[]". When I replace
float[] positions = fields.getFieldPositions("Signature");
System.out.println( positions );
with
System.out.println( fields.getFieldPositions("Signature") );
我得到了结果 [com.itextpdf.text.pdf.AcroFields$FieldPosition@36af35b1 ] ,但我需要漂浮值。
你能用这个任务帮我吗?
I got result "[com.itextpdf.text.pdf.AcroFields$FieldPosition@36af35b1]", but I need float values. Can you help me please with this task?
推荐答案
为了彻底解决这个问题,我写了这个java类:
To completely solve the problem, I wrote this java class:
// GetSigPos.java
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import java.io.*;
//import java.util.*;
import java.util.List;
//import java.awt.List;
class GetSigPos {
public static void main(String[] args) throws IOException {
String pdfFile = args[0];
PdfReader reader = new PdfReader(pdfFile);
AcroFields fields = reader.getAcroFields();
for(String signame : fields.getBlankSignatureNames()) {
List<AcroFields.FieldPosition> positions = fields.getFieldPositions(signame);
Rectangle rect = positions.get(0).position; // In points:
float left = rect.getLeft();
float bTop = rect.getTop();
float width = rect.getWidth();
float height = rect.getHeight();
int page = positions.get(0).page;
Rectangle pageSize = reader.getPageSize(page);
float pageHeight = pageSize.getTop();
float top = pageHeight - bTop;
System.out.print(signame + "::" + page + "::" + left + "::" + top + "::" + width + "::" + height + "\n");
}
}
}
然后我可以在命令行:
javac GetSigPos.java
java GetSigPos "MyForm.pdf"
或者在我的php程序中,我可以使用以下命令执行它们:
Or in my php program I can execute them using this command:
exec('java -cp .:/usr/local/bin/pdfbox/itextpdf-5.4.4.jar:/usr/local/bin/pdfbox GetSigPos "'.$pdfName.'" 2>&1', $output);
echo '<pre>';
print_r($output);
echo '</pre>';
P.S。不要忘记在你的java中键入CLASSPATH!我正在使用 Centos 6 :
P.S. Don't forget to type CLASSPATH to your java! I'm using Centos 6:
vi /root/.bash_rofile
并输入:
export JAVA_HOME=/usr/lib/jvm/jre-1.5.0-gcj
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:/usr/local/bin/pdfbox/itextpdf-5.4.4.jar:/usr/local/bin/pdfbox
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