我正在將 EDI 檔案轉換為 XML。但是，我的輸入檔案恰好也在 BIF 中，大約為 100Mb，這給了我一個 JAVA 記憶體不足錯誤。
我嘗試查閱 Smook 的檔案以了解大檔案轉換，但它是從 XML 到 EDI 的轉換。
以下是我在運行 main 時得到的回應
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at java.util.Arrays.copyOf(Arrays.java:3332)
at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:124)
at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:596)
at java.lang.StringBuffer.append(StringBuffer.java:367)
at java.io.StringWriter.write(StringWriter.java:94)
at java.io.Writer.write(Writer.java:127)
at freemarker.core.TextBlock.accept(TextBlock.java:56)
at freemarker.core.Environment.visit(Environment.java:257)
at freemarker.core.MixedContent.accept(MixedContent.java:57)
at freemarker.core.Environment.visitByHiddingParent(Environment.java:278)
at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:157)
at freemarker.core.Environment.visitIteratorBlock(Environment.java:501)
at freemarker.core.IteratorBlock.accept(IteratorBlock.java:67)
at freemarker.core.Environment.visit(Environment.java:257)
at freemarker.core.Macro$Context.runMacro(Macro.java:173)
at freemarker.core.Environment.visit(Environment.java:686)
at freemarker.core.UnifiedCall.accept(UnifiedCall.java:80)
at freemarker.core.Environment.visit(Environment.java:257)
at freemarker.core.MixedContent.accept(MixedContent.java:57)
at freemarker.core.Environment.visit(Environment.java:257)
at freemarker.core.Environment.process(Environment.java:235)
at freemarker.template.Template.process(Template.java:262)
at org.milyn.util.FreeMarkerTemplate.apply(FreeMarkerTemplate.java:92)
at org.milyn.util.FreeMarkerTemplate.apply(FreeMarkerTemplate.java:86)
at org.milyn.event.report.HtmlReportGenerator.applyTemplate(HtmlReportGenerator.java:76)
at org.milyn.event.report.AbstractReportGenerator.processFinishEvent(AbstractReportGenerator.java:197)
at org.milyn.event.report.AbstractReportGenerator.processLifecycleEvent(AbstractReportGenerator.java:157)
at org.milyn.event.report.AbstractReportGenerator.onEvent(AbstractReportGenerator.java:92)
at org.milyn.Smooks._filter(Smooks.java:558)
at org.milyn.Smooks.filterSource(Smooks.java:482)
at com.***.xfunctional.EdiToXml.runSmooksTransform(EdiToXml.java:40)
at com.***.xfunctional.EdiToXml.main(EdiToXml.java:57)
import java.io.*;
import java.util.Arrays;
import java.util.Locale;
import javax.xml.transform.stream.StreamSource;
import org.milyn.Smooks;
import org.milyn.SmooksException;
import org.milyn.container.ExecutionContext;
import org.milyn.event.report.HtmlReportGenerator;
import org.milyn.io.StreamUtils;
import org.milyn.payload.StringResult;
import org.milyn.payload.SystemOutResult;
import org.xml.sax.SAXException;
public class EdiToXml {
private static byte[] messageIn = readInputMessage();
protected static String runSmooksTransform() throws IOException, SAXException, SmooksException {
Locale defaultLocale = Locale.getDefault();
Locale.setDefault(new Locale("en", "EN"));
// Instantiate Smooks with the config...
Smooks smooks = new Smooks("smooks-config.xml");
try {
// Create an exec context - no profiles....
ExecutionContext executionContext = smooks.createExecutionContext();
StringResult result = new StringResult();
// Configure the execution context to generate a report...
executionContext.setEventListener(new HtmlReportGenerator("target/report/report.html"));
// Filter the input message to the outputWriter, using the execution context...
smooks.filterSource(executionContext, new StreamSource(new ByteArrayInputStream(messageIn)),result);
Locale.setDefault(defaultLocale);
return result.getResult();
} finally {
smooks.close();
}
}
public static void main(String[] args) throws IOException, SAXException, SmooksException {
System.out.println("\n\n==============Message In==============");
System.out.println("======================================\n");
pause(
"The EDI input stream can be seen above. Press 'enter' to see this stream transformed into XML...");
String messageOut = EdiToXml.runSmooksTransform();
System.out.println("==============Message Out=============");
System.out.println(messageOut);
System.out.println("======================================\n\n");
pause("And that's it! Press 'enter' to finish...");
}
private static byte[] readInputMessage() {
try {
InputStream input = new BufferedInputStream(new FileInputStream("/home/****/Downloads/BifInputFile.DATA"));
return StreamUtils.readStream(input);
} catch (IOException e) {
e.printStackTrace();
return "<no-message/>".getBytes();
}
}
private static void pause(String message) {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.print("> " message);
in.readLine();
} catch (IOException e) {
}
System.out.println("\n");
}
}
<?xml version="1.0"?>
<smooks-resource-list xmlns="http://www.milyn.org/xsd/smooks-1.1.xsd" xmlns:edi="http://www.milyn.org/xsd/smooks/edi-1.4.xsd">
<!--
Configure the EDI Reader to parse the message stream into a stream of SAX events.
-->
<edi:reader mappingModel="edi-to-xml-bif-mapping.xml" validate="false"/>
</smooks-resource-list>
我在代碼中編輯了這一行以反映流的使用：-
smooks.filterSource(executionContext, new StreamSource(new FileInputStream("/home/***/Downloads/sample-text-file.txt")), result);
但是我現在在下面有這個錯誤。有人猜猜最好的方法是什么？
Exception in thread "main" org.milyn.SmooksException: Failed to filter source.
at org.milyn.delivery.sax.SmooksSAXFilter.doFilter(SmooksSAXFilter.java:97)
at org.milyn.delivery.sax.SmooksSAXFilter.doFilter(SmooksSAXFilter.java:64)
at org.milyn.Smooks._filter(Smooks.java:526)
at org.milyn.Smooks.filterSource(Smooks.java:482)
at ****.EdiToXml.runSmooksTransform(EdiToXml.java:41)
at com.***.***.EdiToXml.main(EdiToXml.java:58)
Caused by: org.milyn.edisax.EDIParseException: EDI message processing failed [EDIFACT-BIF-TO-XML][1.0]. Must be a minimum of 1 instances of segment [UNH]. Currently at segment number 1.
at org.milyn.edisax.EDIParser.mapSegments(EDIParser.java:504)
at org.milyn.edisax.EDIParser.mapSegments(EDIParser.java:453)
at org.milyn.edisax.EDIParser.parse(EDIParser.java:428)
at org.milyn.edisax.EDIParser.parse(EDIParser.java:386)
at org.milyn.smooks.edi.EDIReader.parse(EDIReader.java:111)
at org.milyn.delivery.sax.SAXParser.parse(SAXParser.java:76)
at org.milyn.delivery.sax.SmooksSAXFilter.doFilter(SmooksSAXFilter.java:86)
... 5 more
uj5u.com熱心網友回復：
訊息有效且 xml 映射良好。我只是沒有使用最佳的訊息讀寫方法。
我開始意識到 Smooks 的 filterSource 方法可以直接輸入 InputStream 和 OutputStream 作為變數。請在下面找到導致程式有效運行而不會出現 JAVA 記憶體錯誤的代碼。
//Instantiate a FileInputStream
FileInputStream inputStream = new FileInputStream(inputFileName);
//Instantiate an FileOutputStream
FileOutputStream outputStream = new FileOutputStream(outputFileName);
try {
// Filter the input message to the outputWriter...
smooks.filterSource(new StreamSource(inputStream), new StreamResult(outputStream));
Locale.setDefault(defaultLocale);
} finally {
smooks.close();
inputStream.close();
outputStream.close();
}
感謝社區。
問候。
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