Html转PDF--一般用于生成合同等场景

maven:

<dependencies>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.xhtmlrenderer</groupId>
            <artifactId>core-renderer</artifactId>
            <version>R8</version>
        </dependency>

    </dependencies>

java：

 import com.itextpdf.text.pdf.BaseFont;
import com.lowagie.text.DocumentException;
import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class PDFUtil {
    /**
     * 生成 PDF 文件
     *
     * @param out  输出流
     * @param html HTML字符串
     * @throws IOException       IO异常
     * @throws DocumentException Document异常
     */
    public static void createPDF(OutputStream out, String html) throws IOException, DocumentException {
        ITextRenderer renderer = new ITextRenderer();
        renderer.setDocumentFromString(html);
        // 解决中文支持问题
        ITextFontResolver fontResolver = renderer.getFontResolver();
        if (System.getProperty("os.name").contains("Window")) {
            fontResolver.addFont("C:/Windows/Fonts/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
        } else {
            fontResolver.addFont("/usr/share/fonts/win/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
        }
        renderer.layout();
        renderer.createPDF(out);
    }

    public static void main(String[] args) throws IOException, DocumentException {
        File file = new File("D://test.pdf");
        if (!file.exists()) {
            file.createNewFile();
        }
        FileOutputStream outputStream = new FileOutputStream(file);
        String html = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\"\n" +
                "        \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n" +
                "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\">\n" +
                "\n" +
                "<head>\n" +
                "\t<meta http-equiv=\"Content-Type\" content=\"text/html;charset=utf-8\"/>\n" +
                "\t<title>Title</title>\n" +
                "\t<style type=\"text/css\">\n" +
                "\t\t.red{\n" +
                "\t\t\tcolor:red;\n" +
                "\t\t\tfont-size:30px;\n" +
                "\t\t}\n" +
                "\t</style>\n" +
                "</head>\n" +
                "\n" +
                "<body style = \"font-family: SimSun\" > \n" +
                "\t<p class=\"red\">123123</p>\n" +
                "\t<p style=\"margin-left:300px;font-family: SimSun;\">22尊敬的用户</p>\n" +
                "</body>\n" +
                "\n" +
                "</html>";
        createPDF(outputStream, html);

    }
}

xhtmlrenderer只能处理静态化的html。由于xhtmlrenderer对html的检查很严格，必须使用闭合标签，即<img></img>或者<img/>这种才是可识别的。而且如果是复杂一点的html，最外层必须有<html></html>标签才可以。

Html转PDF--一般用于生成合同等场景

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