使用iText導出PDF文件（支持中文，解析html）

1，加入依賴：

<!--導出pdf相關-->
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itextpdf</artifactId>
            <version>5.5.10</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf</groupId>
            <artifactId>itext-asian</artifactId>
            <version>5.2.0</version>
        </dependency>
        <dependency>
            <groupId>com.itextpdf.tool</groupId>
            <artifactId>xmlworker</artifactId>
            <version>5.5.11</version>
        </dependency>
<!--處理html相關->
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.11.2</version>
        </dependency>

從C:\Windows\Fonts文件夾拷貝字體文件simfang.ttf到項目classpath下的font文件夾（其它目錄也可以）

二：代碼示例

package itextpdf;
 
import com.itextpdf.text.*;
import com.itextpdf.text.pdf.*;
import com.itextpdf.tool.xml.XMLWorkerFontProvider;
import com.itextpdf.tool.xml.XMLWorkerHelper;
import org.jsoup.Jsoup;
import org.junit.Test;
 
import java.io.*;
import java.nio.charset.Charset;
 
/**
 * @description 導出pdf文件
 * @date 2018/3/16 16:48$
 */
public class ExportPdfTest {
 
    @Test
    public void export() throws Exception {
//創建document Document document = new Document(PageSize.A4);
        //設置要導出的文件名
        OutputStream outputStream = new FileOutputStream(new File("C:\\Users\\Administrator\\Desktop\\test.pdf"));
        PdfWriter writer = PdfWriter.getInstance(document, outputStream);
        document.open();
        //獲取字體文件目錄
        String fontDir = this.getClass().getClassLoader().getResource("font").getFile();
        //註冊字體文件
        XMLWorkerFontProvider xmlWorkerFontProvider = new XMLWorkerFontProvider(fontDir);
        //設置中文字體，本文舉例使用的是仿宋
        BaseFont baseFont = BaseFont.createFont("font/SIMFANG.ttf", BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
        Font font12 = new Font(baseFont, 12);
 
        //頁眉，是可以雙層或更多,取決於放置的座標
        PdfContentByte cb = writer.getDirectContent();
        //頁眉左上
        Phrase leftp1 = new Phrase("頁眉左上", font12);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, leftp1, document.left(), document.top() + 13, 0);
        //頁眉左下
        Phrase leftp2 = new Phrase("頁眉左下:", font12);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, leftp2, document.left(), document.top(), 0);
        //頁眉右上
        Phrase rightp1 = new Phrase("頁眉右上:", font12);
        float rightp1WidthPoint = baseFont.getWidthPoint(rightp1.getContent(), 12);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, rightp1, document.right() - rightp1WidthPoint, document.top() + 13, 0);
        //頁眉右下
        Phrase rightp2 = new Phrase("頁眉右下:", font12);
        float rightp2WidthPoint = baseFont.getWidthPoint(rightp2.getContent(), 12);
        ColumnText.showTextAligned(cb, Element.ALIGN_LEFT, rightp2, document.right() - rightp2WidthPoint, document.top(), 0);
 
        //下劃線
        PdfContentByte canvas = writer.getDirectContent();
        CMYKColor magentaColor = new CMYKColor(1.f, 1.f, 1.f, 1.f);
        canvas.setColorStroke(magentaColor);
        canvas.moveTo(document.left(), document.top() - 4);
        canvas.lineTo(document.right(), document.top() - 4);
        canvas.closePathStroke();
 
        //標題
        Font h1 = new Font(baseFont, 20, Font.BOLD);//創建全文標題字體，參數分別是字體類別,字號,效果
        Paragraph paragraphTitle = new Paragraph("標題測試", h1);//設置文本內容和要使用的字體
        paragraphTitle.setAlignment(Element.ALIGN_CENTER);//設置居中
        document.add(paragraphTitle);
 
        //正文標題1
        Font h3 = new Font(baseFont, 14, Font.BOLD);//創建標題字體
        Paragraph paragraphH1 = new Paragraph("正文標題1", h3);
        document.add(paragraphH1);
        //正文1
        Paragraph paragraphText1 = new Paragraph("你能做到最好，你能做到最好，你能做到最好，你能做到最好，你能做到最好，你能做到最好，你能做到最好。", font12);
        document.add(paragraphText1);
 
        //正文2，html標籤內容
        String content = "<div class=\"overflow-hidden\"><div class=\"editContent\"><p><br>eah, you could be the greatest<br>你會成爲最偉大的人<br>You can be the best<br>你能做到最好<br>You can be the King Kong banging on your chest<br>你能像金剛一樣自信滿滿的敲打胸脯<br>You could beat the world<br>你可以征服全世界<br>You could beat the war<br>能夠贏得一切戰爭<br>You could talk to God, go banging on his door<br>甚至能夠與神對話 去敲打他的門<br>You can throw your hands up<br>你能自信的舉起雙手<br>You can be the clock<br>你可以與時間抗爭<br>You can move a mountain<br>你有移山之力<br>You can break rocks<br>你能擊碎岩石<br>You can be a master<br>你可以成爲命運主宰<br>Don't wait for luck<br>無需等待運氣垂青<br>Dedicate yourself and you can find yourself<br>放手一搏後你會恍然發現<br>Standing in the hall of fame<br>你已身處名人堂之中</p></div></div>";
        //html轉換成普通文字,方法如下:
        org.jsoup.nodes.Document contentDoc = Jsoup.parseBodyFragment(content);
        org.jsoup.nodes.Document.OutputSettings outputSettings = new org.jsoup.nodes.Document.OutputSettings();
        outputSettings.syntax(org.jsoup.nodes.Document.OutputSettings.Syntax.xml);
        contentDoc.outputSettings(outputSettings);
        String parsedHtml = contentDoc.outerHtml();
        //這兒的font-family不支持漢字，{font-family:仿宋} 是不可以的。
        InputStream cssIs = new ByteArrayInputStream("* {font-family: fangsong;}".getBytes("UTF-8"));
        //第四個參數是html中的css文件的輸入流
        //第五個參數是字體提供者，使用系統默認支持的字體時，可以不傳。
        XMLWorkerHelper.getInstance().parseXHtml(writer, document, new ByteArrayInputStream(parsedHtml.getBytes()), cssIs, xmlWorkerFontProvider);
 
        //頁腳
        PdfContentByte cj = writer.getDirectContent();
        Phrase leftp3 = new Phrase("頁腳左側", font12);
        ColumnText.showTextAligned(cj, Element.ALIGN_LEFT, leftp3, document.left(), document.bottom(), 0);
        Phrase rightp3 = new Phrase("頁腳右側", font12);
        final float rightp3WidthPoint = baseFont.getWidthPoint(rightp3.getContent(), 12);
        ColumnText.showTextAligned(cj, Element.ALIGN_LEFT, rightp3, document.right() - rightp3WidthPoint, document.bottom(), 0);
 
        //關閉
        document.close();
}}

三：導出文件展示