我想在scala中构建一个sparql查询。我有使用apache arq库的问题,这是Java的意思。依赖关系似乎没有问题,但是Intellij无法解析ParameterizedSparqlString构造函数并生成QueryEngineHTTP构造函数。我正在运行jdk 1.8。有任何想法吗?感谢!Scala Sparql与Apache Jena的查询
val sparqlentities = namedEntitiesByDocument
.mapPartitions(iter => {
val sparqlEndpoint = "localhost:1643";
iter.map(t => {
t._1, t._2.map(namedEntity => {
val sparqlQuery = "" + "SELECT ?s { \n ?s rdfs:label" + namedEntity.surfaceForm + " . \n }"
val query = QueryFactory.create(sparqlQuery, Syntax.syntaxARQ)
// val querySolutionMap = new QuerySolutionMap()
val parameterizedSparqlString = new ParameterizedSparqlString(query.toString(), new QuerySolutionMap())
val httpQuery = new QueryEngineHTTP(sparqlEndpoint,parameterizedSparqlString.asQuery())
val results = httpQuery.execSelect()
while (results.hasNext()) {
val solution = results.next()
val fin_result = solution.get("s").asLiteral().getLexicalForm()
(namedEntity.surfaceForm, fin_result)
}
})
})
})
哪个耶拿版?你使用Maven吗?如果是这样,请显示Maven依赖项。最后,你真的得到一个编译器错误吗? – AKSW