package cn.flightfeather.supervision.common.pdf
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import com.itextpdf.html2pdf.ConverterProperties
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import com.itextpdf.html2pdf.HtmlConverter
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import com.itextpdf.html2pdf.resolver.font.DefaultFontProvider
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import com.itextpdf.io.font.PdfEncodings
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import com.itextpdf.kernel.font.PdfFontFactory
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import com.itextpdf.layout.font.FontProvider
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import freemarker.template.Configuration
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import org.apache.pdfbox.pdmodel.PDDocument
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import org.apache.pdfbox.rendering.PDFRenderer
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import java.io.*
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import javax.imageio.ImageIO
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import javax.servlet.http.HttpServletResponse
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/**
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* @Description: 生成PDF工具类
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*/
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object GeneratePdfUtil {
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private val TEMPORARY_CONTRACT_HTML = (Thread.currentThread().contextClassLoader?.getResource("/")?.path ?: "src/main/resources/") + "templates/temporary.html"
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private val SIMSUN_FILE = (Thread.currentThread().contextClassLoader?.getResource("/")?.path ?: "src/main/resources/") + "font/"
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private var cfg: Configuration? = null
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@Throws(Exception::class)
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fun generateContract(param: DynamicParam): List<String> {
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// 生成html合同
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generateHTML(param.templatePath, param.templateName, param.param)
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// 根据html合同生成pdf合同
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generatePDF(param.outPath + param.outName)
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// 根据pdf生成图片
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val picPaths = generatePic(param.outPath + param.outName)
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// 删除临时html格式合同
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removeFile(TEMPORARY_CONTRACT_HTML)
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return picPaths
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}
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/**
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* @Description 生成html格式
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*/
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@Throws(Exception::class)
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private fun generateHTML(templatePath: String, templateName: String, paramMap: Map<String, Any>) {
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if (cfg == null) {
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cfg = Configuration(Configuration.VERSION_2_3_31)
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cfg?.defaultEncoding = "UTF-8"
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/**
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* 1.setClassForTemplateLoading(this.getClass(), "/HttpWeb");
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* 基于类路径，HttpWeb包下的framemaker.ftl文件
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* 2.setDirectoryForTemplateLoading(new File("/template"));
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* 基于文件系统,template目录下的文件
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* 3.setServletContextForTemplateLoading(request.getSession().getServletContext(), "/template");
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* 基于Servlet Context，指的是基于WebRoot下的template下的framemaker.ftl文件
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*/
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val file = File(templatePath)
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if (!file.exists()) {
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file.mkdirs()
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}
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cfg?.setDirectoryForTemplateLoading(file)
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}
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// templateName.ftl为要装载的模板
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val template = cfg?.getTemplate(templateName)
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val outHtmFile = File(TEMPORARY_CONTRACT_HTML)
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val out: Writer = BufferedWriter(OutputStreamWriter(FileOutputStream(outHtmFile), "utf-8"))
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// 将参数输出到模版，并操作到HTML上
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// val env = template?.createProcessingEnvironment(paramMap, out)
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// env?.outputEncoding = "utf-8"
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// env?.process()
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template?.process(paramMap, out)
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out.close()
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}
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/**
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* @Description 根据html生成pdf
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*/
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@Throws(Exception::class)
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private fun generatePDF(pdfUrl: String) {
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val htmFile = File(TEMPORARY_CONTRACT_HTML)
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val pdfFile = File(pdfUrl)
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if (!pdfFile.parentFile.exists()) {
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pdfFile.parentFile.mkdirs()
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}
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println(pdfUrl)
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// val url = htmFile.toURI()
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// val os: OutputStream = FileOutputStream(pdfFile)
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// val renderer = ITextRenderer()
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// renderer.setDocument(url)
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// val fontResolver = renderer.fontResolver
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// // 解决中文支持问题
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// fontResolver.addFont(SIMSUM_FILE, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED)
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// renderer.layout()
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// renderer.createPDF(os)
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// os.close()
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val p = ConverterProperties()
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println("------------------------------>>>>>>>${SIMSUN_FILE}")
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// p.charset = "UTF-8"
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p.fontProvider = FontProvider().apply {
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// addStandardPdfFonts()
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// addDirectory(SIMSUN_FILE)
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addSystemFonts()
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}
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HtmlConverter.convertToPdf(htmFile, pdfFile, p)
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}
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/**
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* @Description 根据pdf生成图片
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*/
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@Throws(Exception::class)
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private fun generatePic(pdfUrl: String): List<String> {
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val picPaths = mutableListOf<String>()
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val pdfFile = File(pdfUrl)
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if (!pdfFile.exists()) {
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throw FileNotFoundException("$pdfUrl 文件不存在")
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}
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val doc = PDDocument.load(pdfFile)
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val renderer = PDFRenderer(doc)
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val pageCount = doc.numberOfPages
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for (i in 0 until pageCount) {
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val outputPath = pdfUrl.replace(".pdf", "(${i}).jpg");
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val outputFile = File(outputPath)
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picPaths.add(outputPath)
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// dpi，图片像素点，dpi越高图片体积越大，216很清晰，105体积稳定
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val image = renderer.renderImageWithDPI(i, 216f)
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// 格式为JPG
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ImageIO.write(image, "jpg", outputFile)
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}
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doc.close()
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return picPaths
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}
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/**
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* @Description 移除文件
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*/
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private fun removeFile(fileUrl: String) {
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val file = File(fileUrl)
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file.delete()
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}
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@Throws(Exception::class)
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fun returnPdfStream(response: HttpServletResponse, pathName: String?) {
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response.contentType = "application/pdf"
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val file = File(pathName)
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if (file.exists()) {
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val `in` = FileInputStream(file)
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val out: OutputStream = response.outputStream
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val b = ByteArray(1024 * 5)
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var n: Int
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while (`in`.read(b).also { n = it } != -1) {
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out.write(b, 0, n)
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}
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out.flush()
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`in`.close()
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out.close()
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}
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}
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}
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