我在編譯過(guò)程中遇到了問(wèn)題。你能幫忙解決問(wèn)題嗎？`public static void main(String[] args) throws IOException { File dir = new File("C:data\\test"); String[] fileNames = dir.list(); FileWriter outFile = new FileWriter("out.ttl"); RDFWriter writer = org.eclipse.rdf4j.rio.Rio.createWriter(RDFFormat.TURTLE, outFile ); writer.startRDF(); for (String fileName : fileNames) { System.out.println("Reading from " + fileName); File f = new File(dir, fileName); Model data = Rio.parse(new FileInputStream(f), "", RDFFormat.TURTLE); for (Statement st: data) { if ( "efrbroo:F22_Self-Contained_Expression" != null ) { writer.handleStatement(st); } } } writer.endRDF();}`這個(gè)問(wèn)題的最初問(wèn)題在這里：RDF4J數(shù)據(jù)合并
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慕田峪4524236
TA貢獻(xiàn)1875條經(jīng)驗(yàn) 獲得超5個(gè)贊
您正在循環(huán)訪問(wèn)對(duì)象，這些對(duì)象是 RDF 語(yǔ)句的 Java 表示形式，或“三元組”。它有一個(gè)主語(yǔ)（可通過(guò)）、謂詞 （） 和一個(gè)賓語(yǔ) （）。請(qǐng)參閱 https://rdf4j.eclipse.org/documentation/getting-started/ 更詳細(xì)的介紹。StatementStatement.getSubject()Statement.getPredicate()Statement.getObject()
例如，如果要?jiǎng)h除所有以 IRI 為對(duì)象的三元組，可以執(zhí)行如下操作：http://example.org/F22_Self-Contained_Expression
IRI f22SelfContainedExpression = SimpleValueFactory.getInstance().createIRI("http://example.org/F22_Self-Contained_Expression");
...
if (!st.getObject().equals(f22SelfContainedExpression)) {
writer.handleStatement(st);
}
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