我试图写一个嵌入式自定义的fop xml到pdf java应用程序使用自定义图像重定向内的fop
我在一个旧的xslt文件中有以下内容
<fo:block text-indent="1mm" padding-before="20mm">
<xsl:variable name="barcode" select="concat('/prescriptions/', id, '/barcode.html')"/>
<fo:external-graphic>
<xsl:attribute name="src">
<xsl:value-of select="$barcode" />
</xsl:attribute>
</fo:external-graphic>
</fo:block>我写了一个自定义ResourceResolver
package embedding;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.xmlgraphics.io.Resource;
import org.apache.xmlgraphics.io.ResourceResolver;
import java.io.BufferedInputStream;
import java.net.URI;
import java.net.URISyntaxException;
public class CustomResourceResolver implements ResourceResolver {
String base;
String session;
String cookie;
String user_id;
String authorization;
static final Logger logger = Logger.getLogger("fop-log");
public String get_base(){
return base;
}
public CustomResourceResolver(String _base, String _session, String _cookie, String _user_id, String _authorization){
super();
base = _base;
session = _session;
cookie = _cookie;
user_id = _user_id;
authorization = _authorization;
}
@Override
public Resource getResource(URI uri) throws IOException {
HttpURLConnection urlConnection = null;
try {
String href = uri.getRawPath();
if (!href.startsWith("/") && !base.endsWith("/")) {
base = base + "/";
}
String new_uri;
if (href.startsWith("http://") || href.startsWith("https://")) {
new_uri = href;
} else {
new_uri = base + href;
}
uri = new URI(new_uri);
logger.log(Level.INFO, "loading: ({0})", new_uri);
URL url = uri.toURL();
urlConnection = (HttpURLConnection) url.openConnection();
if(session!= null){
urlConnection.setRequestProperty("Cookie", cookie + "=" + session);
}
if(authorization != null){
urlConnection.setRequestProperty("Fop-authorization", authorization );
}
if(user_id != null){
urlConnection.setRequestProperty("Fop-user",user_id );
}
InputStream in = new BufferedInputStream(urlConnection.getInputStream());
return new Resource(in);
} catch (MalformedURLException e) {
logger.log(Level.SEVERE, null, e);
return null;
} catch (IOException | URISyntaxException ioe) {
logger.log(Level.SEVERE, null, ioe);
return null;
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
}
}
@Override
public OutputStream getOutputStream(URI uri) throws IOException {
URL url = uri.toURL();
return url.openConnection().getOutputStream();
}
}这个被称为
CustomResourceResolver resolver = new CustomResourceResolver(base, session, cookie, user_id, authorization);
FopFactoryBuilder builder = new FopFactoryBuilder(new File(".").toURI(), (ResourceResolver)resolver);
final FopFactory fopFactory = builder.build();
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
OutputStream out = new java.io.FileOutputStream(pdffile);
out = new java.io.BufferedOutputStream(out);
try {
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent, out);
TransformerFactory factory = TransformerFactory.newInstance();
URIResolver uiResolver = new CustomUriResolver(base, session, cookie, user_id, authorization);
factory.setURIResolver(uiResolver);
Transformer transformer = factory.newTransformer(new StreamSource(xsltfile));
// Set the value of a <param> in the stylesheet
transformer.setParameter("versionParam", "2.0");
// Setup input for XSLT transformation
Source src = new StreamSource(xmlfile);
// Resulting SAX events (the generated FO) must be piped through to FOP
Result res = new SAXResult(fop.getDefaultHandler());
// Start XSLT transformation and FOP processing
transformer.transform(src, res);
} finally {
out.close();
}java被打包在单个FopXml2Pdf.jar中，并从命令行调用，如下所示：java -jar FopXml2Pdf.jar file.xml file.xsl file.config
但当我运行代码时
Sep 19, 2023 6:52:36 AM embedding.CustomResourceResolver getResource
INFO: loading: (http://localhost:3000/prescriptions/420/barcode.html)
Sep 19, 2023 6:52:36 AM org.apache.xmlgraphics.image.loader.impl.AbstractImageSessionContext createImageSource
SEVERE: Unable to create ImageInputStream for InputStream from system identifier 'file:/media/sf_Clintel/careright/./' (stream is closed)
Sep 19, 2023 6:52:36 AM org.apache.fop.events.LoggingEventListener processEvent
SEVERE: Image not found. URI: /prescriptions/420/barcode.html. (No context info available)我可以看到重定向是加载正确的网址获得正确的数据，但
new File（“.”）.toURI（）正在解析为文件：/media/sf_Clintel/careright/./
我应该将其设置为什么，以便它保存来自Resource getResource的数据？
2条答案
按热度按时间0dxa2lsx1#
我已经更改了customResourceResolver，以便它输出一个文件，然后我将该文件作为InputStream资源返回
但我现在
文件已正确获取，但未嵌入到fop文档中
我已经退房了org.apache.xmlgraphics.image.loader.ImageException: The file format is not supported. No ImagePreloader found
但这行不通
我的jar的顺序是：Jar ordering
任何额外的帮助都是受欢迎的
kuhbmx9i2#
问题已解决。使用ANT将Batik-all-1.14.jar Package 到单个脂肪罐中导致了该异常。将 Package 更改为使用MVN已修复此问题