在近期项目中使用到itextpdf用于导出pdf,主要是html代码块(这块主要用到freemarker作为传值。下文会用到freemarker如何将数据库html代码块及数据整合成完整html)。
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-asian</artifactId>
<version>5.2.0</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-pdfa</artifactId>
<version>5.5.7</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext-xtra</artifactId>
<version>5.5.7</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.7</version>
</dependency>
package xxx.xxx;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.i18n.LocaleContextHolder;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.Font;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.RectangleReadOnly;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.XMLWorkerHelper;
public class HtmlUtil {
private static final Logger logger = LoggerFactory.getLogger(HtmlUtil.class);
private static final String regEx_script = "<script[^>]*?>[\\s\\S]*?<\\/script>";
private static final String regEx_style = "<style[^>]*?>[\\s\\S]*?<\\/style>";
private static final String regEx_html = "<[^>]+>";
private static final String regEx_space = "\\s*|\t|\r|\n";
public static String delHTMLTag(String htmlStr) {
Pattern p_script = Pattern.compile("<script[^>]*?>[\\s\\S]*?<\\/script>", 2);
Matcher m_script = p_script.matcher(htmlStr);
htmlStr = m_script.replaceAll("");
Pattern p_style = Pattern.compile("<style[^>]*?>[\\s\\S]*?<\\/style>", 2);
Matcher m_style = p_style.matcher(htmlStr);
htmlStr = m_style.replaceAll("");
Pattern p_html = Pattern.compile("<[^>]+>", 2);
Matcher m_html = p_html.matcher(htmlStr);
htmlStr = m_html.replaceAll("");
Pattern p_space = Pattern.compile("\\s*|\t|\r|\n", 2);
Matcher m_space = p_space.matcher(htmlStr);
htmlStr = m_space.replaceAll("");
return htmlStr.trim();
}
public static String getTextFromHtml(String htmlStr) {
htmlStr = delHTMLTag(htmlStr);
htmlStr = htmlStr.replaceAll(" ", "");
htmlStr = htmlStr.substring(0, htmlStr.indexOf("。") + 1);
return htmlStr;
}
public static String getHtmlFile(String urlStr) {
try {
if (urlStr.indexOf("?") != -1) {
urlStr =
urlStr + "&locale=" + LocaleContextHolder.getLocale().toString();
} else {
urlStr =
urlStr + "?locale=" + LocaleContextHolder.getLocale().toString();
}
System.out.println("-------" + urlStr);
URL url = new URL(urlStr);
URLConnection uc = url.openConnection();
InputStream fis = uc.getInputStream();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
int ch;
while ((ch = fis.read()) != -1) {
bos.write(ch);
}
fis.close();
byte[] bs = bos.toByteArray();
bos.close();
String basil = new String(bs, "UTF-8");
return basil.toString();
} catch (IOException e) {
logger.error("get html error: " + urlStr, e);
e.printStackTrace();
}
return "";
}
public static ByteArrayOutputStream parseHTML2PDF(ByteArrayOutputStream pdfOut, String html, Rectangle pageSize)
throws Exception {
BaseFont bfCN = BaseFont.createFont("STSong-Light", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
Font chFont = new Font(bfCN, 12.0F, 0, BaseColor.BLUE);
Font secFont = new Font(bfCN, 12.0F, 0, new BaseColor(0, 204,
255));
Document document = new Document(pageSize);
PdfWriter pdfwriter = PdfWriter.getInstance(document,
pdfOut);
pdfwriter.setViewerPreferences(4096);
document.open();
logger.debug("转换html为pdf,pageSize:{}, html: {}", pageSize.toString(), html);
XMLWorkerHelper.getInstance().parseXHtml(pdfwriter, document, new StringReader(html));
document.close();
return pdfOut;
}
public static ByteArrayOutputStream parseHTML2PDFOfFootHeader(ByteArrayOutputStream pdfOut, String html, Rectangle pageSize, String headerStr)
throws Exception {
BaseFont bfCN = BaseFont.createFont("STSong-Light", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
Font chFont = new Font(bfCN, 12.0F, 0, BaseColor.BLUE);
Font secFont = new Font(bfCN, 12.0F, 0, new BaseColor(0, 204,
255));
Document document = new Document(pageSize);
PdfWriter pdfwriter = PdfWriter.getInstance(document,
pdfOut);
pdfwriter.setViewerPreferences(4096);
HeaderFooter header = new HeaderFooter(headerStr, 8, pageSize);
pdfwriter.setPageEvent(header);
document.open();
XMLWorkerHelper.getInstance().parseXHtml(pdfwriter, document, new StringReader(html));
document.close();
return pdfOut;
}
public static ByteArrayOutputStream parseHTML2PDFOfFootHeader(ByteArrayOutputStream pdfOut, String html, Rectangle pageSize, String headerStr, float headx, float heady, float footx, float footy)
throws Exception {
BaseFont bfCN = BaseFont.createFont("STSong-Light", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
Font chFont = new Font(bfCN, 12.0F, 0, BaseColor.BLUE);
Font secFont = new Font(bfCN, 12.0F, 0, new BaseColor(0, 204,
255));
Document document = new Document(pageSize);
PdfWriter pdfwriter = PdfWriter.getInstance(document,
pdfOut);
pdfwriter.setViewerPreferences(4096);
HeaderFooter header = new HeaderFooter(headerStr, 8, pageSize, headx, heady, footx, footy);
pdfwriter.setPageEvent(header);
document.open();
XMLWorkerHelper.getInstance().parseXHtml(pdfwriter, document, new StringReader(html));
document.close();
return pdfOut;
}
public static Map<String, Double> setMapValues(Map<String, Double> map, String key, Double value) {
if (map.containsKey(key)) {
value = Double.valueOf(value.doubleValue() + ((Double) map.get(key)).doubleValue());
}
map.put(key, value);
return map;
}
public static void main(String[] args) {
//获取
String str = "<div style='text-align:center;'> ${phone1}<br/><span style='font-size:14px;'> </span><span style='font-size:18px;'>${phone2}</span><br/></div>";
Map<String, Object> variables = new HashMap<String, Object>(0);
variables.put("phone1", "a张1");
variables.put("phone2", "b李2");
String html = ElUtils.parseExpression(variables, str, "test");
System.out.println(html);
try {
ByteArrayOutputStream btOutputStream = parseHTML2PDF(new ByteArrayOutputStream(), html, new RectangleReadOnly(842, 1191));
FileOutputStream fileOutputStream = new FileOutputStream("F:\\baidu.pdf");
fileOutputStream.write(btOutputStream.toByteArray());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
package xxx.xxx;
import com.itextpdf.text.BaseColor;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Font;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Phrase;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.ColumnText;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.text.pdf.PdfTemplate;
import com.itextpdf.text.pdf.PdfWriter;
import com.itextpdf.tool.xml.XMLWorkerFontProvider;
import java.io.IOException;
public class HeaderFooter
extends PdfPageEventHelper
{
Font font = new XMLWorkerFontProvider().getFont("宋体", 12.0F, BaseColor.RED);
PdfTemplate total;
public String header = "";
public Rectangle pageSize = PageSize.A4;
public int presentFontSize = 12;
public BaseFont bf = null;
public Font fontDetail = null;
public float headx = 0.0F;
public float heady = 0.0F;
public float footx = 0.0F;
public float footy = 0.0F;
public HeaderFooter() {}
public HeaderFooter(String yeMei, int presentFontSize, Rectangle pageSize)
{
this.header = yeMei;
this.presentFontSize = presentFontSize;
this.pageSize = pageSize;
}
public HeaderFooter(String yeMei, int presentFontSize, Rectangle pageSize, float headx, float heady, float footx, float footy)
{
this.header = yeMei;
this.presentFontSize = presentFontSize;
this.pageSize = pageSize;
this.headx = headx;
this.heady = heady;
this.footx = footx;
this.footy = footy;
}
public HeaderFooter(String yeMei, int presentFontSize, Rectangle pageSize, float headx, float heady)
{
this.header = yeMei;
this.presentFontSize = presentFontSize;
this.pageSize = pageSize;
this.headx = headx;
this.heady = heady;
}
public void setHeader(String header)
{
this.header = header;
}
public void setPresentFontSize(int presentFontSize)
{
this.presentFontSize = presentFontSize;
}
public void onOpenDocument(PdfWriter writer, Document document)
{
PdfContentByte cb = writer.getDirectContent();
this.total = cb.createTemplate(30.0F, 16.0F);
}
public void onEndPage(PdfWriter writer, Document document)
{
try
{
if (this.bf == null) {
this.bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", false);
}
if (this.fontDetail == null) {
this.fontDetail = new Font(this.bf, this.presentFontSize, 0);
}
}
catch (DocumentException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
int pageS = writer.getPageNumber();
String foot1 = "第 " + pageS + " 页 /共";
Phrase footer = new Phrase(foot1, this.fontDetail);
float len = this.bf.getWidthPoint(foot1, this.presentFontSize);
ColumnText.showTextAligned(writer.getDirectContent(), 0, new Phrase(this.header, this.fontDetail), document.left() + this.headx, document.top() + 20.0F + this.heady, 0.0F);
PdfContentByte cb = writer.getDirectContent();
ColumnText.showTextAligned(cb, 1, footer, (document.rightMargin() + document.right() + document.leftMargin() - document.left() - len) / 2.0F + 20.0F + this.footx, document.bottom() - 20.0F + this.footy, 0.0F);
cb.addTemplate(this.total, (document.rightMargin() + document.right() + document.leftMargin() - document.left()) / 2.0F + 20.0F + this.footx, document.bottom() - 20.0F + this.footy);
}
public void onCloseDocument(PdfWriter writer, Document document)
{
this.total.beginText();
this.total.setFontAndSize(this.bf, this.presentFontSize);
String foot2 = writer.getPageNumber() - 1 + " 页 ";
this.total.showTextAligned(3, foot2, 2.0F, 0.35F, 0.0F);
this.total.endText();
this.total.closePath();
}
}
package xxx.xxx;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.util.HashMap;
import java.util.Map;
import com.itextpdf.text.PageSize;
public class TestHtml {
public static void main(String[] args) {
String htmlString ="<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\r\n" +
"<html xmlns=\"http://www.w3.org/1999/xhtml\">\r\n" +
"<head>\r\n" +
" <meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\"/>\r\n" +
" <meta http-equiv=\"Content-Style-Type\" content=\"text/css\"/>\r\n" +
" <title></title>\r\n" +
"</head>\r\n" +
"<body>\r\n" +
"<!--第一页开始-->\r\n" +
"<div class=\"page\" >\r\n" +
" <div style=\"text-align : center;\"><p>${templateName}</p></div>\r\n" +
" <div><p>iText guanwang:${ITEXTUrl}</p></div>\r\n" +
" <div><p>FreeMarker gunawang:${freeMarkerUrl}</p></div>\r\n" +
" <div><p>JFreeChartJiaocheng:${JFreeChartUrl}</p></div>\r\n" +
" <div>liebiaozhi:</div>\r\n" +
"</div>\r\n" +
"<!--第一页结束-->\r\n" +
"<!---分页标记-->\r\n" +
"<span style=\"page-break-after:always;\"></span>\r\n" +
"<!--第二页开始-->\r\n" +
"\r\n" +
"\r\n" +
"<!--第二页结束-->\r\n" +
"</body>\r\n" +
"</html>";
Map<String, Object> variables = new HashMap<String, Object>(0);
variables.put("templateName", "1234567");
variables.put("ITEXTUrl", "longxing520.cn");
variables.put("freeMarkerUrl", "longxing520.cn/aaa");
variables.put("JFreeChartUrl", "JFreelongxing520.cn");
//此处主要是将html与数据绑定。
String html = ElUtils.parseExpression(variables, htmlString, "模板格式错误");
System.out.println(html);
try {
ByteArrayOutputStream btOutputStream = HtmlUtil.parseHTML2PDF(new ByteArrayOutputStream(), html, PageSize.A5);
FileOutputStream fileOutputStream = new FileOutputStream("F:\\baidu.pdf");
fileOutputStream.write(btOutputStream.toByteArray());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
由于前期用到的是EL表达是将带有el表达式的html代码块及数据转为标准的html代码。后期没用到,暂时就按照这个来吧。如有需要我贴出el表达式工具那块(主要是list时写的工具会后面数据会将前期的数据覆盖。所以后期用到freemarker)
第一次写请见谅。
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