问题
I get a file not found exception while loading a freemarker template even though the template is actually present in the path.
Update: This is running as a webservice. It will return an xml to the client based on a search query. The template loads successfully when i call it from another java program(from static main). But the when the client requests for the xml, FileNotFoundException occurs.
OS: Windows 7 Absolute path of file: C:/Users/Jay/workspace/WebService/templates/
Here is my code:
private String templatizeQuestion(QuestionResponse qr) throws Exception
{
SimpleHash context = new SimpleHash();
Configuration config = new Configuration();
StringWriter out = new StringWriter();
Template _template = null;
if(condition1)
{
_template = config.getTemplate("/templates/fibplain.xml");
}
else if(condition2)
{
_template = config.getTemplate("/templates/mcq.xml");
}
context.put("questionResponse", qr);
_template.process(context, out);
return out.toString();
}
Full Error Stack:
java.io.FileNotFoundException: Template /templates/fibplain.xml not found.
at freemarker.template.Configuration.getTemplate(Configuration.java:495)
at freemarker.template.Configuration.getTemplate(Configuration.java:458)
at com.hm.newAge.services.Curriculum.templatizeQuestion(Curriculum.java:251)
at com.hm.newAge.services.Curriculum.processQuestion(Curriculum.java:228)
at com.hm.newAge.services.Curriculum.processQuestionList(Curriculum.java:210)
at com.hm.newAge.services.Curriculum.getTest(Curriculum.java:122)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212)
at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:117)
at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40)
at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:114)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)
at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:172)
at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:146)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
回答1:
FreeMarker template paths are resolved by a TemplateLoader object, which you should specify in the Configuration object. The path that you specify as the template path is interpreted by the TemplateLoader, and is usually relative to some kind of base directory (even if it starts with /), that's also called the template root directory for this reason. In your example, you haven't specified any TemplateLoader, so you are using the default TemplateLoader, which is only there for backward-compatibility, and is nearly useless (and also dangerous). So, do something like this:
config.setDirectoryForTemplateLoading(new File(
"C:/Users/Jay/workspace/WebService/templates"));
and then:
config.getTemplate("fibplain.xml");
Note that the /template prefix is not there now, as the template path is relative to C:/Users/Jay/workspace/WebService/templates. (This also means that the template can't back out of it with ../-s, which can be important for security.)
Instead of loading from a real directory, you can also load templates from a SerlvetContext, from the "class path", etc. It all depends on what TemplateLoader you are choosing.
See also: http://freemarker.org/docs/pgui_config_templateloading.html
Update: If you get FileNotFoundException instead of TemplateNotFoundException, it's time to upgrade FreeMarker to at least 2.3.22. It also gives better error messages, like if you do the typical mistake of using the default TemplateLoader, it tells you that right in the error message. Less wasted developer time.
回答2:
You can solve this problem like that.
public class HelloWorldFreeMarkerStyle {
public static void main(String[] args) {
Configuration configuration = new Configuration();
configuration.setClassForTemplateLoading(HelloWorldFreeMarkerStyle.class, "/");
FileTemplateLoader templateLoader = new FileTemplateLoader(new File("resources"));
configuration.setTemplateLoader(templateLoader);
Template helloTemp= configuration.getTemplate("hello.ftl");
StringWriter writer = new StringWriter();
Map<String,Object> helloMap = new HashMap<String,Object>();
helloMap.put("name","gokhan");
helloTemp.process(helloMap,writer);
System.out.println(writer);
}
}
回答3:
The Java VM is not able to find you file /templates/fibplain.xml in the specified location. This is an absolute path and it is highly likely that you are confused with relative path. To get this corrected use the complete (i.e absolute) path properly like /home/jaykumar/templates/fibplan.xml($TEMPLATE_HOME/fibplan.xml). Other possibility would be, if you do have such location as /templates/, you might not have placed fibplain.xml in the location. To me only these two are the most plausible reasons. I assumed it is one of the linux distribution because of the separator is /
回答4:
this work like a Charm ,
package tech.service.common;
import freemarker.cache.FileTemplateLoader;
import freemarker.cache.TemplateLoader;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import freemarker.template.Version;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import tech.alphalupi.rhcore.dto.MailResponseDto;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;
@Service
public class MailingService {
@Autowired
private JavaMailSender sender;
public MailResponseDto sendEmail(String mailTo,String Subject) {
MailResponseDto response = new MailResponseDto();
MimeMessage message = sender.createMimeMessage();
Configuration config = new Configuration(new Version(2, 3, 0));
try {
// set mediaType
MimeMessageHelper helper = new MimeMessageHelper(message, MimeMessageHelper.MULTIPART_MODE_MIXED_RELATED,
StandardCharsets.UTF_8.name());
TemplateLoader templateLoader = new FileTemplateLoader(new File("src/main/resources/template"));
config.setTemplateLoader(templateLoader);
// add attachment
helper.addAttachment("logo.png", new File("src/main/resources/static/images/spring.png"));
Template t = config.getTemplate("email_template_password.ftl");
Map<String, Object> model = new HashMap<>();
model.put("Name", "ELAMMARI Soufiane");
model.put("location", "Casablanca,Morocco");
String html = FreeMarkerTemplateUtils.processTemplateIntoString(t, model);
helper.setTo("example@gmail.com");
helper.setText(html, true);
helper.setSubject(Subject);
sender.send(message);
response.setMessage("mail send to : " + mailTo);
response.setStatus(Boolean.TRUE);
} catch (MessagingException | IOException | TemplateException e) {
response.setMessage("Mail Sending failure : "+e.getMessage());
response.setStatus(Boolean.FALSE);
}
return response;
}
}
回答5:
Actually you're expected to specify absolute path (not relative) for dir where template is going to be place, see FreeMaker.Configuration:
setDirectoryForTemplateLoading(java.io.File dir)
Sets the file system directory from which to load templates.
Note that FreeMarker can load templates from non-file-system sources too. See setTemplateLoader(TemplateLoader) from more details.
For instance, this is how to get template from test/resources/freemaker:
private String final PATH = "src/test/resources/freemaker"
//getting singleton of Configuration
configuration.setDirectoryForTemplateLoading(new File(PATH)) //surrounded by try/catch
来源：https://stackoverflow.com/questions/14749623/filenotfoundexception-when-loading-freemarker-template-in-java