我正在开发一个模块,它将数据从 XML 文件导出到 PDF 文件,所以我使用 XSLT 作为代理来实现它。
我的代码在独立应用程序中可以正常工作,但在 Web 应用程序中却不能。
我不得不说我的应用服务器是带有 JRE6 和 FOP-1.1 jar 库的 Websphere Liberty Profile 8.5。
我希望你能帮助它,提前谢谢你。
资源:
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.MimeConstants;
import com.sun.xml.internal.messaging.saaj.util.ByteOutputStream;
@WebServlet("/FopTester")
public class FopTester extends HttpServlet {
private static final long serialVersionUID = 1L;
public FopTester() {
super();
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
try {
ByteOutputStream out = new ByteOutputStream();
FopFactory fopFactory = FopFactory.newInstance();
FOUserAgent foUserAgent = fopFactory.newFOUserAgent();
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent,
out);
} catch (Exception e) {
e.printStackTrace();
}
}
}
它失败了:
Fop fop = fopFactory.newFop(MimeConstants.MIME_PDF, foUserAgent,out);
错误:
[err] java.lang.NullPointerException
[err] at com.ibm.ws.classloading.internal.ContainerClassLoader$EntryUniversalResource.getResourceURL(ContainerClassLoader.java:207)
[err] at [internal classes]