Java itext从现有的pdf获取字段坐标
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Itext get field coordinates from existing pdf
提问by Footniko
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:
首先，我不是 Java 开发人员 :( 我只需要小程序，它将从现有的 pdf 文件中按字段名称向我输出字段坐标，当我从命令行调用我的类时，我会输入它，就像这样：
javac GetField.java
java GetField <myForm.pdf>, <myFieldName>
I'm using itext on my server. Now I'm trying to run simple code:
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：
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 );
}
}
But I have error: "Type mismatch: cannot convert from List to float[]". When I replace
但我有错误：“类型不匹配：无法从 List 转换为 float[]”。当我更换
float[] positions = fields.getFieldPositions("Signature");
System.out.println( positions );
with
和
System.out.println( fields.getFieldPositions("Signature") );
I got result "[com.itextpdf.text.pdf.AcroFields$FieldPosition@36af35b1]", but I need float values. Can you help me please with this task?
我得到了结果“ [com.itextpdf.text.pdf.AcroFields$FieldPosition@36af35b1]”，但我需要浮点值。你能帮我完成这个任务吗？
采纳答案by Footniko
To completely solve the problem, I wrote this java class:
为了彻底解决问题，我写了这个java类：
// 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");
}
}
}
Then I can run it in command line:
然后我可以在命令行中运行它：
javac GetSigPos.java
java GetSigPos "MyForm.pdf"
Or in my php program I can execute them using this command:
或者在我的 php 程序中，我可以使用以下命令执行它们：
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.Don't forget to type CLASSPATH to your java! I'm using Centos 6:
PS不要忘记在你的 Java 中输入 CLASSPATH！我正在使用Centos 6：
vi /root/.bash_rofile
And type this:
然后输入：
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
