first commit 稳定版本，已知该版本存在问题，前端未对数据进行校验，没有集成导出excel
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import os
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import matplotlib.pyplot as plt
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import matplotlib.font_manager as fm
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from PIL import Image as PILImage
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from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, Table, Image as RLImage, PageBreak
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from reportlab.lib.styles import ParagraphStyle
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from reportlab.lib.units import mm
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from reportlab.lib import colors
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from reportlab.platypus import TableStyle
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from reportlab.pdfbase.ttfonts import TTFont
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from reportlab.pdfbase import pdfmetrics
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from reportlab.lib.pagesizes import A4
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class NutritionPDFBuilder:
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def __init__(self):
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pdfmetrics.registerFont(TTFont('SimHei', 'C:/Windows/Fonts/simhei.ttf'))
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def build(self, data, output_path):
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doc = SimpleDocTemplate(output_path, pagesize=A4)
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story = []
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# ===== 统一字体 =====
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normal = ParagraphStyle(
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"normal",
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fontName="SimHei",
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fontSize=13,
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leading=18,
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alignment=1
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)
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header = ParagraphStyle(
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"header",
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fontName="SimHei",
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fontSize=13,
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leading=18,
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alignment=1,
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textColor=colors.white
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)
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story.append(Paragraph("营养健康评估报告", normal))
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story.append(Spacer(1, 10 * mm))
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# ================= 食物表 =================
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food_table = []
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food_table.append([Paragraph("食物摄入量评估报告", header), "", "", ""])
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food_table.append([
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Paragraph("种类", header),
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Paragraph("图片", header),
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Paragraph("摄入量", header),
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Paragraph("评价", header)
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])
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for cat, info in data["category_result"].items():
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food_table.append([
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Paragraph(cat, normal),
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self._get_image(cat),
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Paragraph(f"{info['value']} g", normal),
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Paragraph(info["evaluation"], normal)
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])
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# ===== 建议（适中行距）=====
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suggestion_text = "<br/>".join(
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[f"{i+1}. {s}" for i, s in enumerate(data["suggestions"])]
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)
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food_table.append([
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Paragraph("整体评估及建议", normal),
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Paragraph(suggestion_text, normal),
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"",
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""
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])
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t1 = Table(
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food_table,
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colWidths=[40*mm, 55*mm, 40*mm, 30*mm],
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repeatRows=2
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)
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t1.setStyle(TableStyle([
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("SPAN", (0,0), (-1,0)),
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("SPAN", (1,-1), (-1,-1)),
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("BACKGROUND", (0,0), (-1,1), colors.HexColor("#4F75B5")),
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("TEXTCOLOR", (0,0), (-1,1), colors.white),
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("GRID",(0,0),(-1,-1),0.5,colors.grey),
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("FONTNAME",(0,0),(-1,-1),"SimHei"),
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("ALIGN",(0,0),(-1,-1),"CENTER"),
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("VALIGN",(0,0),(-1,-1),"MIDDLE"),
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("TOPPADDING",(0,0),(-1,-1),14),
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("BOTTOMPADDING",(0,0),(-1,-1),14),
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("ROWHEIGHT",(0,2),(-1,-2),45)
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]))
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story.append(t1)
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story.append(PageBreak())
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# ================= 饼图 =================
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pie_path = "temp_pie.png"
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self._generate_pie(data, pie_path)
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n = data["nutrition"]
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energy_table = [
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[Paragraph("能量及钙摄入量评估报告", header), "", ""],
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[
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Paragraph("项目", header),
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Paragraph("摄入量", header),
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Paragraph("评价", header)
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],
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[
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Paragraph("总能量", normal),
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Paragraph(f"{n['energy']['value']} kcal/day", normal),
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Paragraph(n["energy"]["evaluation"], normal)
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],
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[
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Paragraph("三大营养素供能占比", normal),
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self._get_pie(pie_path),
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""
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],
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[
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Paragraph("钙", normal),
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Paragraph(f"{n['calcium']['value']} mg/day", normal),
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Paragraph(n["calcium"]["evaluation"], normal)
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],
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]
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# ===== 解读（适中间距）=====
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interpretation = []
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if n["energy"]["evaluation"] == "不足":
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interpretation.append("能量摄入不足，应增加碳水化合物摄入")
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if n["calcium"]["evaluation"] == "不足":
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interpretation.append("钙摄入不足，应增加奶制品摄入")
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text = "<br/>".join(interpretation)
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energy_table.append([
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Paragraph("解读", normal),
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Paragraph(text, normal),
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""
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])
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t2 = Table(energy_table, colWidths=[50*mm, 70*mm, 40*mm])
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t2.setStyle(TableStyle([
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("SPAN", (0,0), (-1,0)),
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("SPAN", (1,3), (2,3)),
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("SPAN", (1,-1), (2,-1)),
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("BACKGROUND",(0,0),(-1,1),colors.HexColor("#4F75B5")),
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("TEXTCOLOR",(0,0),(-1,1),colors.white),
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("GRID",(0,0),(-1,-1),0.5,colors.grey),
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("FONTNAME",(0,0),(-1,-1),"SimHei"),
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("ALIGN",(0,0),(-1,-1),"CENTER"),
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("VALIGN",(0,0),(-1,-1),"MIDDLE"),
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("TOPPADDING",(0,0),(-1,-1),14),
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("BOTTOMPADDING",(0,0),(-1,-1),14),
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]))
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story.append(t2)
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doc.build(story)
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# ================= 图片 =================
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def _get_image(self, category):
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base = os.path.dirname(os.path.abspath(__file__))
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path = os.path.join(base, "static", "images", f"{category}.png")
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if os.path.exists(path):
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return RLImage(path, width=35*mm, height=35*mm)
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return ""
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# ================= 饼图 =================
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def _generate_pie(self, data, path):
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font_path = r"C:\Windows\Fonts\simhei.ttf"
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font_prop = fm.FontProperties(fname=font_path)
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protein = float(data["nutrition"].get("protein", 0))
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fat = float(data["nutrition"].get("fat", 0))
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carb = float(data["nutrition"].get("carbohydrate", 0))
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protein_kcal = protein * 4
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fat_kcal = fat * 9
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carb_kcal = carb * 4
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total = protein_kcal + fat_kcal + carb_kcal
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values = [1,1,1] if total == 0 else [
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protein_kcal / total,
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fat_kcal / total,
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carb_kcal / total
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]
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labels = [
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f"蛋白质 {protein}g",
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f"脂肪 {fat}g",
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f"碳水 {carb}g"
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]
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plt.figure(figsize=(6,6))
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plt.gca().set_aspect('equal')
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plt.pie(
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values,
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labels=labels,
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autopct="%1.1f%%",
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startangle=90,
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textprops={'fontproperties': font_prop, 'fontsize': 12}
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)
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plt.title("三大营养素供能占比", fontproperties=font_prop)
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plt.savefig(path, bbox_inches='tight')
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plt.close()
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# ================= 饼图插入 =================
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def _get_pie(self, path):
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if not os.path.exists(path):
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return ""
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img = PILImage.open(path)
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w, h = img.size
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target_w = 90 * mm
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target_h = target_w * (h / w)
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return RLImage(path, width=target_w, height=target_h)
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