Use itext be filled according to the template and generate PDF
1. POM file is added
<!-- itextpdf 依赖包 -->
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.10</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-asian</artifactId>
<version>5.2.0</version>
</dependency>
2. Create PdfUtils Tools
import com.itextpdf.text.Document;
import com.itextpdf.text.pdf.*;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import java.io.*;
import java.util.*;
public class PdfUtils
{
/**
* @param map 需要填充的字段
* @param sourceFile 原文件路径
* @param targetFile 目标文件路径
* @throws IOException
*/
public static void genPdf(HashMap map, String sourceFile, String targetFile) throws IOException {
File templateFile = new File(sourceFile);
fillParam(map, FileUtils.readFileToByteArray(templateFile), targetFile);
}
/**
* Description: 使用map中的参数填充pdf，map中的key和pdf表单中的field对应 <br>
* @author mk
* @Date 2018-11-2 15:21 <br>
* @Param
* @return
*/
public static void fillParam(Map<String, String> fieldValueMap, byte[] file, String contractFileName) {
FileOutputStream fos = null;
try {
fos = new FileOutputStream(contractFileName);
PdfReader reader = null;
PdfStamper stamper = null;
BaseFont base = null;
try {
reader = new PdfReader(file);
stamper = new PdfStamper(reader, fos);
stamper.setFormFlattening(true);
//base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED); //简体中文字体
base = BaseFont.createFont("MHei-Medium", "UniCNS-UCS2-H", BaseFont.NOT_EMBEDDED); //繁体中文字体
AcroFields acroFields = stamper.getAcroFields();
for (String key : acroFields.getFields().keySet()) {
acroFields.setFieldProperty(key, "textfont", base, null);
acroFields.setFieldProperty(key, "textsize", new Float(9), null); //字体大小
}
if (fieldValueMap != null) {
for (String fieldName : fieldValueMap.keySet())
{
if (StringUtils.isNotBlank(fieldValueMap.get(fieldName)))
{
//获取map中key对应的Value是否为On，若是则勾选复选框
if (fieldValueMap.get(fieldName).equals("On") || fieldValueMap.get(fieldName) == "On")
{
acroFields.setField(fieldName, fieldValueMap.get(fieldName),true);
}else
{
acroFields.setField(fieldName, fieldValueMap.get(fieldName));
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (stamper != null) {
try {
stamper.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (reader != null) {
reader.close();
}
}
} catch (Exception e) {
System.out.println("填充参数异常");
e.printStackTrace();
} finally {
IOUtils.closeQuietly(fos);
}
}
/**
* Description: 获取pdf表单中的fieldNames<br>
* @author mk
* @Date 2018-11-2 15:21 <br>
* @Param
* @return
*/
public static Set<String> getTemplateFileFieldNames(String pdfFileName) {
Set<String> fieldNames = new TreeSet<String>();
PdfReader reader = null;
try {
reader = new PdfReader(pdfFileName);
Set<String> keys = reader.getAcroFields().getFields().keySet();
for (String key : keys) {
int lastIndexOf = key.lastIndexOf(".");
int lastIndexOf2 = key.lastIndexOf("[");
fieldNames.add(key.substring(lastIndexOf != -1 ? lastIndexOf + 1 : 0, lastIndexOf2 != -1 ? lastIndexOf2 : key.length()));
}
} catch (IOException e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();
}
}
return fieldNames;
}
/**
* Description: 读取文件数组<br>
* @author mk
* @Date 2018-11-2 15:21 <br>
* @Param
* @return
*/
public static byte[] fileBuff(String filePath) throws IOException {
File file = new File(filePath);
long fileSize = file.length();
if (fileSize > Integer.MAX_VALUE) {
//System.out.println("file too big...");
return null;
}
FileInputStream fi = new FileInputStream(file);
byte[] file_buff = new byte[(int) fileSize];
int offset = 0;
int numRead = 0;
while (offset < file_buff.length && (numRead = fi.read(file_buff, offset, file_buff.length - offset)) >= 0) {
offset += numRead;
}
// 确保所有数据均被读取
if (offset != file_buff.length) {
throw new IOException("Could not completely read file " + file.getName());
}
fi.close();
return file_buff;
}
/**
* Description: 合并pdf <br>
* @author mk
* @Date 2018-11-2 15:21 <br>
* @Param
* @return
*/
public static void mergePdfFiles(String[] files, String savepath) {
Document document = null;
try {
document = new Document(); //默认A4大小
PdfCopy copy = new PdfCopy(document, new FileOutputStream(savepath));
document.open();
for (int i = 0; i < files.length; i++) {
PdfReader reader = null;
try {
reader = new PdfReader(files[i]);
int n = reader.getNumberOfPages();
for (int j = 1; j <= n; j++) {
document.newPage();
PdfImportedPage page = copy.getImportedPage(reader, j);
copy.addPage(page);
}
} finally {
if (reader != null) {
reader.close();
}
}
}
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭PDF文档流，OutputStream文件输出流也将在PDF文档流关闭方法内部关闭
if (document != null) {
document.close();
}
}
}
}
3. Implementing the code
public static void main(String[] args) throws IOException
{
//Map中Key对应PDF表单中的fieldNames，Value则是你想填充的值
HashMap map = new HashMap<String, String>();
map.put("name","杨杰");
map.put("sexMan","On"); //Value为On 则勾选这个复选框
map.put("age","27");
map.put("phone","15521331");
map.put("email","[email protected]");
String sourceFile = "D:\\proposal.pdf"; //原文件路径
String targetFile = "D:\\test.pdf"; //目标文件路径
PdfUtils.genPdf(map,sourceF,targetF);
}
