首先下载 JAR 包
创建 HTML 文档（将要使用的 HTML 文档素材）
引入 JAR 包 ，编写JAVA 转换代码
5.在指定路径下就可以得到 PDF 结果
目前项目中需要用到把HTML格式的文本片段，以PDF格式输出下载，现决定采用itext组件来实现。maven配置：
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.4.2</version>
</dependency>
<dependency>
<groupId>com.itextpdf.tool</groupId>
<artifactId>xmlworker</artifactId>
<version>5.4.1</version>
</dependency>
代码片段：
[html] view plain copy
public class PdfUtil {
/**
* 重写 字符设置方法，解决中文乱码问题
*
*/
public static class MyFontsProvider extends XMLWorkerFontProvider {
public MyFontsProvider(){
super(null, null)
}
@Override
public Font getFont(final String fontname, String encoding, float size, final int style) {
String fntname = fontname
if (fntname == null) {
fntname = "宋体"
}
if (size == 0) {
size = 4
}
return super.getFont(fntname, encoding, size, style)
}
}
private static Logger logger= LoggerFactory.getLogger(PdfUtil.class)
/**
* PDF生成路径
*/
public static final String PDF_DOWNLOAD_PATH = "/trialRecord/pdf/"
/**
* 导出PDF文件
*
* @param content
* @param response
*/
public void exportPdf(String fileName, String content, HttpServletResponse response) {
FileOutputStream fos = null
FileInputStream in = null
OutputStream out = null
Document document = new Document()
File newPath = null
try {
if (StringUtils.isBlank(fileName)) {
fileName = DateUtil.getTodayDateTime().replaceAll(" ", "").replaceAll(":", "").replaceAll("-", "")
+ "文件名.pdf"
}
fileName = new String(fileName.getBytes("UTF-8"), "ISO-8859-1")
String dicPath = new File(".").getCanonicalPath()
String srcPath = dicPath + PDF_DOWNLOAD_PATH + fileName
newPath = new File(dicPath + PDF_DOWNLOAD_PATH)
newPath.mkdirs()
// 删除临时文件
boolean success = fileDelete(newPath)
if (success) {
newPath.mkdirs()
File file = new File(srcPath)
fos = new FileOutputStream(file)
PdfWriter writer = PdfWriter.getInstance(document, fos)
document.open()
InputStream htmlInput = new ByteArrayInputStream(content.getBytes("UTF-8"))
// 使用我们的字体提供器，并将其设置为unicode字体样式
MyFontsProvider fontProvider = new MyFontsProvider()
fontProvider.addFontSubstitute("lowagie", "garamond")
fontProvider.setUseUnicode(true)
CssAppliers cssAppliers = new CssAppliersImpl(fontProvider)
HtmlPipelineContext htmlContext = new HtmlPipelineContext(cssAppliers)
htmlContext.setTagFactory(Tags.getHtmlTagProcessorFactory())
XMLWorkerHelper.getInstance().getDefaultCssResolver(true)
XMLWorkerHelper.getInstance().parseXHtml(writer, document, htmlInput, null, Charset.forName("UTF-8"),
fontProvider)
document.close()
writer.close()
// 设置文件ContentType类型，这样设置，会自动判断下载文件类型
response.setContentType("multipart/form-data")
// 设置响应头，控制浏览器下载该文件
response.setHeader("content-disposition", "attachmentfilename=" + fileName)
// 读取要下载的文件，保存到文件输入流
in = new FileInputStream(srcPath)
// 创建输出流
out = response.getOutputStream()
// 创建缓冲区
byte buffer[] = new byte[1024]
int len = 0
// 循环将输入流中的内容读取到缓冲区当中
while ((len = in.read(buffer)) >0) {
// 输出缓冲区的内容到浏览器，实现文件下载
out.write(buffer, 0, len)
}
}
} catch (DocumentException e) {
logger.error("Export PDF error :" + e.getMessage())
throw new RuntimeException("Export PDF error : ", e)
} catch (IOException e) {
logger.error("Export PDF error :" + e.getMessage())
throw new RuntimeException("Export PDF error : ", e)
} catch (Exception e) {
logger.error("Export PDF error :" + e.getMessage())
throw new RuntimeException("Export PDF error : ", e)
} finally {
IOUtils.closeQuietly(fos)
IOUtils.closeQuietly(in)
IOUtils.closeQuietly(out)
if (newPath != null) {
fileDelete(newPath)
}
}
}
/**
* 删除文件
*
* @param file
* @return
*/
private boolean fileDelete(File file) {
if (file.isDirectory()) {
String[] children = file.list()
// 递归删除目录中的子目录下
for (int i = 0i <children.lengthi++) {
boolean success = fileDelete(new File(file, children[i]))
if (!success) {
return false
}
}
}
// 目录此时为空，可以删除
return file.delete()
}
}
用正则表达式：
string ss="/^<([a-z]+)([^<]+)*(?:>(.*)<\/\1>|\s+\/>)$/"string s = Regex.Replace(" abra ", ss, "")
