preparando el imprimir

src/main/java/com/imprimelibros/erp/pdf/PdfRenderer.java

@@ -0,0 +1,44 @@
+package com.imprimelibros.erp.pdf;
+
+import com.openhtmltopdf.pdfboxout.PdfRendererBuilder;
+import org.springframework.core.io.Resource;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Service;
+
+import java.io.ByteArrayOutputStream;
+
+@Service
+public class PdfRenderer {
+
+    @Value("classpath:/static/")
+    private Resource staticRoot;
+
+    public byte[] renderHtmlToPdf(String html) {
+        try (var baos = new ByteArrayOutputStream()) {
+            var builder = new PdfRendererBuilder();
+
+            builder.useFont(() -> getClass().getResourceAsStream("/static/assets/fonts/OpenSans-Regular.ttf"), "Open Sans",
+                    400, com.openhtmltopdf.outputdevice.helper.BaseRendererBuilder.FontStyle.NORMAL, true);
+            builder.useFont(() -> getClass().getResourceAsStream("/static/assets/fonts/OpenSans-SemiBold.ttf"), "Open Sans",
+                    600, com.openhtmltopdf.outputdevice.helper.BaseRendererBuilder.FontStyle.NORMAL, true);
+            builder.useFont(() -> getClass().getResourceAsStream("/static/assets/fonts/OpenSans-Bold.ttf"), "Open Sans", 700,
+                    com.openhtmltopdf.outputdevice.helper.BaseRendererBuilder.FontStyle.NORMAL, true);
+
+            builder.useFastMode();
+            builder.withHtmlContent(html, baseUrl());
+            builder.toStream(baos);
+            builder.run();
+            return baos.toByteArray();
+        } catch (Exception e) {
+            throw new IllegalStateException("Error generando PDF", e);
+        }
+    }
+
+    private String baseUrl() {
+        try {
+            return staticRoot.getURL().toString();
+        } catch (Exception e) {
+            return null;
+        }
+    }
+}