From c15fe6d34afc94c95a1c9f496649b405163337a2 Mon Sep 17 00:00:00 2001
From: 杜洪波 <1074825718@qq.com>
Date: 星期一, 18 八月 2025 15:51:14 +0800
Subject: [PATCH] java代码转PDF
---
src/main/java/com/product/file/util/PDFOperateUtil.java | 149 +++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 143 insertions(+), 6 deletions(-)
diff --git a/src/main/java/com/product/file/util/PDFOperateUtil.java b/src/main/java/com/product/file/util/PDFOperateUtil.java
index 7487152..7f83868 100644
--- a/src/main/java/com/product/file/util/PDFOperateUtil.java
+++ b/src/main/java/com/product/file/util/PDFOperateUtil.java
@@ -4,12 +4,14 @@
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
+import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import javax.imageio.ImageIO;
+import org.apache.fontbox.ttf.TrueTypeCollection;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;
import org.apache.pdfbox.pdmodel.PDPageContentStream;
@@ -20,6 +22,132 @@
public class PDFOperateUtil {
+
+ public static void createPdfWithCode(String javaFilePath, String outputPath) throws IOException {
+ String javaCode = readJavaFileWithComments(javaFilePath);
+
+ try (PDDocument document = new PDDocument()) {
+ PDPage page = new PDPage(PDRectangle.A4);
+ document.addPage(page);
+
+ // 鍔犺浇瀛椾綋锛堝 SimSun锛�
+ File fontFile = getSystemFontFile();
+ if (!fontFile.exists()) {
+ throw new IOException("鏈壘鍒颁腑鏂囧瓧浣撴枃浠�");
+ }
+ TrueTypeCollection ttc = new TrueTypeCollection(fontFile);
+ // 閫氳繃瀛椾綋鍚嶇О鑾峰彇锛堝 "SimSun"锛�
+ PDType0Font font = PDType0Font.load(document, ttc.getFontByName("SimSun"), true);
+// PDType0Font font = PDType0Font.load(document, fontFile);
+ float fontSize = 10;
+ float margin = 50;
+ float leading = 1.2f * fontSize; // 琛岃窛
+
+ // 鍙敤瀹藉害 = 椤甸潰瀹藉害 - 宸﹀彸杈硅窛
+ PDRectangle mediaBox = page.getMediaBox();
+ float availableWidth = mediaBox.getWidth() - 2 * margin;
+
+ // 鍒濆 Y 浣嶇疆锛堜粠椤堕儴寮�濮嬶級
+ float yPosition = mediaBox.getHeight() - margin;
+ float startX = margin;
+
+ // 鍒嗗壊浠ｇ爜涓鸿
+ String[] lines = javaCode.split("\n");
+
+ PDPageContentStream contentStream = null;
+ try {
+ contentStream = new PDPageContentStream(document, page);
+ contentStream.setFont(font, fontSize);
+
+ for (String line : lines) {
+ // 濡傛灉褰撳墠琛岃秴鍑洪〉闈㈠簳閮紝鎹㈤〉
+ if (yPosition < margin) {
+ contentStream.close();
+ page = new PDPage(PDRectangle.A4);
+ document.addPage(page);
+ yPosition = mediaBox.getHeight() - margin;
+ contentStream = new PDPageContentStream(document, page);
+ contentStream.setFont(font, fontSize);
+ }
+
+ // 澶勭悊瓒呭琛岋細鎸夊瓧绗︽媶鍒嗗苟鎹㈣
+ while (!line.isEmpty()) {
+ // 璁＄畻褰撳墠琛岃兘瀹圭撼鐨勬渶澶у瓧绗︽暟
+ int maxChars = calculateMaxChars(font, fontSize, line, availableWidth);
+ String subLine = line.substring(0, Math.min(maxChars, line.length()));
+ line = line.substring(subLine.length());
+
+ // 鍐欏叆褰撳墠瀛愯
+ writeTextLine(contentStream, subLine, startX, yPosition);
+ yPosition -= leading;
+
+ // 濡傛灉鍓╀綑鍐呭浠嶈秴鍑洪〉闈㈠簳閮紝鎹㈤〉
+ if (yPosition < margin && !line.isEmpty()) {
+ contentStream.close();
+ page = new PDPage(PDRectangle.A4);
+ document.addPage(page);
+ yPosition = mediaBox.getHeight() - margin;
+ contentStream = new PDPageContentStream(document, page);
+ contentStream.setFont(font, fontSize);
+ }
+ }
+ }
+ } finally {
+ if (contentStream != null) {
+ contentStream.close();
+ }
+ }
+
+ document.save(outputPath);
+ }
+ }
+
+ // 璁＄畻涓�琛岃兘瀹圭撼鐨勬渶澶у瓧绗︽暟
+ private static int calculateMaxChars(PDType0Font font, float fontSize, String text, float availableWidth) throws IOException {
+ float width = 0;
+ int i = 0;
+ for (; i < text.length(); i++) {
+ width += font.getWidth(text.charAt(i)) / 1000 * fontSize;
+ if (width > availableWidth) {
+ break;
+ }
+ }
+ return i;
+ }
+
+ // 鍐欏叆鍗曡鏂囨湰锛堝乏瀵归綈锛�
+ private static void writeTextLine(PDPageContentStream contentStream, String text, float x, float y) throws IOException {
+ contentStream.beginText();
+ contentStream.newLineAtOffset(x, y);
+ contentStream.showText(text);
+ contentStream.endText();
+ }
+
+ /**
+ * 璇诲彇 Java 鏂囦欢鍐呭锛堜繚鐣欐敞閲婂拰绌鸿锛�
+ */
+ private static String readJavaFileWithComments(String filePath) throws IOException {
+ StringBuilder codeBuilder = new StringBuilder();
+ try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
+ String line;
+ while ((line = reader.readLine()) != null) {
+ line = line.replace("\t", " ");
+ // 淇濈暀鎵�鏈夎锛堝寘鎷敞閲婂拰绌鸿锛�
+ codeBuilder.append(line).append("\n");
+ }
+ }
+ return codeBuilder.toString();
+ }
+
+ /**
+ * 璁＄畻瀛椾綋楂樺害锛堝熀浜庡瓧浣撶殑 Ascent 鍜� Descent锛�
+ */
+ private static float calculateFontHeight(PDType0Font font, float fontSize) {
+ float ascent = font.getFontDescriptor().getAscent();
+ float descent = font.getFontDescriptor().getDescent();
+ return (ascent - descent) / 1000 * fontSize;
+ }
+
/**
* 鏍规嵁鏂囨湰鏂囦欢鍒涘缓 PDF锛堜娇鐢� PDFBox锛�
*
@@ -29,7 +157,7 @@
*/
public static void createPdfFromTextFile(String textFilePath, String pdfFilePath) throws IOException {
String content = readTextFile(textFilePath);
-
+ content = content.replace("\t", " ");
try (PDDocument document = new PDDocument()) {
PDPage page = new PDPage(PDRectangle.A4);
document.addPage(page);
@@ -39,12 +167,16 @@
if (!fontFile.exists()) {
throw new IOException("鏈壘鍒版敮鎸佺殑涓枃瀛椾綋鏂囦欢锛圵indows/Linux锛�");
}
+ TrueTypeCollection ttc = new TrueTypeCollection(fontFile);
+
+ // 閫氳繃瀛椾綋鍚嶇О鑾峰彇锛堝 "SimSun"锛�
+ PDType0Font font = PDType0Font.load(document, ttc.getFontByName("SimSun"), true);
// 鍔犺浇瀛椾綋
- PDType0Font font;
- try (FileInputStream fontStream = new FileInputStream(fontFile)) {
- font = PDType0Font.load(document, fontStream);
- }
+// PDType0Font font;
+// try (FileInputStream fontStream = new FileInputStream(fontFile)) {
+// font = PDType0Font.load(document, fontStream);
+// }
// 鍐欏叆 PDF 鍐呭
try (PDPageContentStream contentStream = new PDPageContentStream(document, page)) {
@@ -132,6 +264,10 @@
if (os.contains("win")) {
// Windows 瀛椾綋鐩綍锛堜紭鍏堟鏌ュ父瑙佷腑鏂囧瓧浣擄級
possiblePaths = new String[]{
+// System.getenv("WINDIR") + "\\Fonts\\arial.ttf", //
+// System.getenv("WINDIR") + "\\Fonts\\simkai.ttf", // 妤蜂綋
+// System.getenv("WINDIR") + "\\Fonts\\simfang.ttf", // 瀹嬩綋
+ System.getenv("WINDIR") + "\\Fonts\\simsun.ttc", // 瀹嬩綋
System.getenv("WINDIR") + "\\Fonts\\simhei.ttf", // 榛戜綋
System.getenv("WINDIR") + "\\Fonts\\msyh.ttc", // 寰蒋闆呴粦
System.getenv("WINDIR") + "\\Fonts\\mingliu.ttc" // 鏄庝綋锛堝鐢級
@@ -162,7 +298,8 @@
public static void main(String[] args) {
try {
// 1. 浠庢枃鏈枃浠跺垱寤� PDF
- createPdfFromTextFile("E://鏂板缓1.txt", "E://鏂板缓1.pdf");
+// createPdfFromTextFile("E://鏂板缓1.txt", "E://鏂板缓1.pdf");
+ createPdfWithCode("E:\\PROJECT\\Product\\鍚庣\\product\\product-server\\product-server-file\\src\\main\\java\\com\\product\\file\\util\\FileUtil.java", "E://鏂板缓1.pdf");
// 2. 璇诲彇 PDF 鍐呭
String content = readPdfContent("E://鏂板缓1.pdf");
--
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