java编程将HTML文件转换成PDF文件
网上有好几种方法可以将将HTML文件转换成PDF文件但是有些对HTML文件格式要求比较严格，稍微错了一些就不能生成我们所要的PDF文件，这里我推荐一个
package samples;import java.awt.Insets;;import java.io.BufferedInputStream;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.StringReader;import java.net.MalformedURLException;import java.net.URL;import java.security.InvalidParameterException;import org.zefer.pd4ml.PD4Constants;import org.zefer.pd4ml.PD4ML;public class GettingStarted2 {protected int topValue = 10;protected int leftValue = 20;protected int rightValue = 10;protected int bottomValue = 10;protected int userSpaceWidth = 1300;public static void main(String[] args) {try {GettingStarted2 jt = new GettingStarted2();String html = readFile("c:/sample.htm", "UTF-8");jt.doConversion2(html, "c:/pd4ml.pdf");} catch (Exception e) {e.printStackTrace();}}public void doConversion2( String htmlDocument, String outputPath ) throws InvalidParameterException, MalformedURLException, IOException {PD4ML pd4ml = new PD4ML();pd4ml.setHtmlWidth(userSpaceWidth); // set frame width of "virtual web browser" // choose target paper formatpd4ml.setPageSize(pd4ml.changePageOrientation(PD4Constants.A4)); // define PDF page marginspd4ml.setPageInsetsMM(new Insets(topValue, leftValue, bottomValue, rightValue)); // source HTML document also may have margins, could be suppressed this way // (PD4ML *Pro* feature):pd4ml.addStyle("BODY {margin: 0}", true);// If built-in basic PDF fonts are not sufficient or // if you need to output non-Latin texts, TTF embedding feature should help // (PD4ML *Pro*)pd4ml.useTTF("c:/windows/fonts", true);ByteArrayOutputStream baos = new ByteArrayOutputStream();// actual document conversion from HTML string to byte arraypd4ml.render(new StringReader(htmlDocument), baos); // if the HTML has relative references to images etc, // use render() method with baseDirectory parameter insteadbaos.close();System.out.println( "resulting PDF size: " + baos.size() + " bytes" );// in Web scenarios it is a good idea to send the size with // "Content-length" HTTP headerFile output = new File(outputPath);java.io.FileOutputStream fos = new java.io.FileOutputStream(output);fos.write( baos.toByteArray() );fos.close();System.out.println( outputPath + "\ndone." );}private final static String readFile( String path, String encoding ) throws IOException {File f = new File( path );FileInputStream is = new FileInputStream(f);BufferedInputStream bis = new BufferedInputStream(is);ByteArrayOutputStream fos = new ByteArrayOutputStream();byte buffer[] = new byte[2048];int read;do {read = is.read(buffer, 0, buffer.length);if (read > 0) { fos.write(buffer, 0, read); }} while (read > -1);fos.close();bis.close();is.close();return fos.toString(encoding);}}