我正在尝试基于 LibreOffice 4.0 实现 Office 一个 PDF 转换系统，并且总是得到 ErrorCodeIOException（尝试了文件格式 doc、docx、txt），我的堆栈跟踪如下：
com.sun.star.task.ErrorCodeIOException:
at com.sun.star.lib.uno.environments.remote.Job.remoteUnoRequestRaisedException(Job.java:177)
at com.sun.star.lib.uno.environments.remote.Job.execute(Job.java:143)
at com.sun.star.lib.uno.environments.remote.JobQueue.enter(JobQueue.java:335)
at com.sun.star.lib.uno.environments.remote.JobQueue.enter(JobQueue.java:304)
at com.sun.star.lib.uno.environments.remote.JavaThreadPool.enter(JavaThreadPool.java:91)
at com.sun.star.lib.uno.bridges.java_remote.java_remote_bridge.sendRequest(java_remote_bridge.java:639)
at com.sun.star.lib.uno.bridges.java_remote.ProxyFactory$Handler.request(ProxyFactory.java:151)
at com.sun.star.lib.uno.bridges.java_remote.ProxyFactory$Handler.invoke(ProxyFactory.java:133)
at com.sun.proxy.$Proxy49.storeAsURL(Unknown Source)
at Framework.Config.DocumentConverter.traverse(DocumentConverter.java:103)
at Framework.Config.DocumentConverter.main1(DocumentConverter.java:184)
at Framework.DAO.CRUD_Generic.ping(CRUD_Generic.java:71)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.apache.struts2.json.JSONInterceptor.invoke(JSONInterceptor.java:248)
at org.apache.struts2.json.JSONInterceptor.intercept(JSONInterceptor.java:133)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:176)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:263)
at org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:270)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)
at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:498)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)
代码如下：
导入 com.sun.star.beans.PropertyValue；导入 com.sun.star.uno.UnoRuntime；
import java.io.File;
import ooo.connector.BootstrapSocketConnector;
public class DocumentConverter {
/**
* Containing the loaded documents
*/
static com.sun.star.frame.XComponentLoader xCompLoader = null;
/**
* Containing the given type to convert to
*/
static String sConvertType = "";
/**
* Containing the given extension
*/
static String sExtension = "";
/**
* Containing the current file or directory
*/
static String sIndent = "";
/**
* Containing the directory where the converted files are saved
*/
static String sOutputDir = "";
/**
* Traversing the given directory recursively and converting their files to
* the favoured type if possible
*
* @param fileDirectory Containing the directory
*/
public static void traverse(File fileDirectory) {
// Testing, if the file is a directory, and if so, it throws an exception
if (!fileDirectory.isDirectory()) {
throw new IllegalArgumentException(
"not a directory: " + fileDirectory.getName());
}
// Prepare Url for the output directory
File outdir = new File(DocumentConverter.sOutputDir);
String sOutUrl = "file:///" + outdir.getAbsolutePath().replace('\\', '/');
System.out.println("\nThe converted documents will stored in \""
+ outdir.getPath() + "!");
System.out.println(sIndent + "[" + fileDirectory.getName() + "]");
sIndent += " ";
// Getting all files and directories in the current directory
File[] entries = fileDirectory.listFiles();
// Iterating for each file and directory
for (int i = 0; i < entries.length; ++i) {
// Testing, if the entry in the list is a directory
if (entries[ i].isDirectory()) {
// Recursive call for the new directory
traverse(entries[ i]);
} else if (entries[i].getName().contains(".doc") || entries[i].getName().contains(".txt")) {
// Converting the document to the favoured type
try {
// Composing the URL by replacing all backslashs
String sUrl = "file:///"
+ entries[ i].getAbsolutePath().replace('\\', '/');
// Loading the wanted document
com.sun.star.beans.PropertyValue propertyValues[];
Object oDocToStore =
DocumentConverter.xCompLoader.loadComponentFromURL(
sUrl, "_blank", 0, new PropertyValue[0]);
// Getting an object that will offer a simple way to store
// a document to a URL.
com.sun.star.frame.XStorable xStorable =
(com.sun.star.frame.XStorable) UnoRuntime.queryInterface(
com.sun.star.frame.XStorable.class, oDocToStore);
// Preparing properties for converting the document
propertyValues = new com.sun.star.beans.PropertyValue[1];
// Setting the filter name
propertyValues[0] = new com.sun.star.beans.PropertyValue();
propertyValues[0].Name = "FilterName";
propertyValues[0].Value = "writer_pdf_Export";
// Appending the favoured extension to the origin document name
int index1 = sUrl.lastIndexOf('/');
int index2 = sUrl.lastIndexOf('.');
String sStoreUrl = sOutUrl + sUrl.substring(index1, index2 + 1)
+ DocumentConverter.sExtension;
// Storing and converting the document
xStorable.storeAsURL(sStoreUrl, propertyValues);
// Closing the converted document. Use XCloseable.clsoe if the
// interface is supported, otherwise use XComponent.dispose
com.sun.star.util.XCloseable xCloseable =
(com.sun.star.util.XCloseable) UnoRuntime.queryInterface(
com.sun.star.util.XCloseable.class, xStorable);
if (xCloseable != null) {
xCloseable.close(false);
} else {
com.sun.star.lang.XComponent xComp =
(com.sun.star.lang.XComponent) UnoRuntime.queryInterface(
com.sun.star.lang.XComponent.class, xStorable);
xComp.dispose();
}
} catch (Exception e) {
e.printStackTrace(System.err);
return;
}
System.out.println(sIndent + entries[ i].getName());
}
}
sIndent = sIndent.substring(2);
}
/**
* Bootstrap UNO, getting the remote component context, getting a new
* instance of the desktop (used interface XComponentLoader) and calling the
* static method traverse
*
* @param args The array of the type String contains the directory, in which
* all files should be converted, the favoured converting type and the
* wanted extension
*/
public static void main1(String args[]) {
if (args.length < 3) {
System.out.println("usage: java -jar DocumentConverter.jar "
+ "\"<directory to convert>\" \"<type to convert to>\" "
+ "\"<extension>\" \"<output_directory>\"");
System.out.println("\ne.g.:");
System.out.println("usage: java -jar DocumentConverter.jar "
+ "\"c:/myoffice\" \"swriter: MS Word 97\" \"doc\"");
return;
}
com.sun.star.uno.XComponentContext xContext = null;
try {
// get the remote office component context
xContext = BootstrapSocketConnector.bootstrap("C:\\Program Files (x86)\\LibreOffice 4.0\\program");
System.out.println("Connected to a running office ...");
// get the remote office service manager
com.sun.star.lang.XMultiComponentFactory xMCF =
xContext.getServiceManager();
Object oDesktop = xMCF.createInstanceWithContext(
"com.sun.star.frame.Desktop", xContext);
xCompLoader = (com.sun.star.frame.XComponentLoader) UnoRuntime.queryInterface(com.sun.star.frame.XComponentLoader.class,
oDesktop);
// Getting the given starting directory
File file = new File(args[0]);
// Getting the given type to convert to
sConvertType = args[1];
// Getting the given extension that should be appended to the
// origin document
sExtension = args[2];
// Getting the given type to convert to
sOutputDir = args[3];
// Starting the conversion of documents in the given directory
// and subdirectories
traverse(file);
} catch (Exception e) {
e.printStackTrace(System.err);
}
}
}
例外是在以下行中生成的：
xStorable.storeAsURL(sStoreUrl, propertyValues);
该代码基于 libreofice api 的原始示例：
http://api.libreoffice.org/examples/java/DocumentHandling/DocumentConverter.java
如果您能提供帮助，请提前致谢