我正在尝试为我的HTML输入表单编写一个模式。我需要接受所有字母（大写和小写），包括特殊字符æ，ø和å（和Æ，Ø，Å）。我还需要接受“ - ”和空白。
答案 0 :(得分：2)
您可以使用字符类来定义接受的字符。 public void run() {
//load properties
Properties pro = new Properties();
FileSystem fs = null;
try {
pro.load(FlinkMain.class.getResourceAsStream("/config.properties"));
fs = FileSystem.get(new URI(pro.getProperty("hdfs.namenode")),new org.apache.hadoop.conf.Configuration());
} catch (Exception e) {
e.printStackTrace();
}
int maxIteration = Integer.parseInt(pro.getProperty("maxiterations"));
String outputPath = fs.getHomeDirectory()+pro.getProperty("flink.output");
// set up execution environment
ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
// get input points
DataSet<GeoTimeDataTupel> points = getPointDataSet(env);
DataSet<GeoTimeDataCenter> centroids = null;
try {
centroids = getCentroidDataSet(env);
} catch (Exception e1) {
e1.printStackTrace();
}
// set number of bulk iterations for KMeans algorithm
IterativeDataSet<GeoTimeDataCenter> loop = centroids.iterate(maxIteration);
DataSet<GeoTimeDataCenter> newCentroids = points
// compute closest centroid for each point
.map(new SelectNearestCenter(this.getBenchmarkCounter())).withBroadcastSet(loop, "centroids")
// count and sum point coordinates for each centroid
.groupBy(0).reduceGroup(new CentroidAccumulator())
// compute new centroids from point counts and coordinate sums
.map(new CentroidAverager(this.getBenchmarkCounter()));
// feed new centroids back into next iteration with termination condition
DataSet<GeoTimeDataCenter> finalCentroids = loop.closeWith(newCentroids, newCentroids.join(loop).where("*").equalTo("*").filter(new MyFilter()));
DataSet<Tuple2<Integer, GeoTimeDataTupel>> clusteredPoints = points
// assign points to final clusters
.map(new SelectNearestCenter(-1)).withBroadcastSet(finalCentroids, "centroids");
// emit result
clusteredPoints.writeAsCsv(outputPath+"/points", "\n", " ");
finalCentroids.writeAsText(outputPath+"/centers");//print();
// execute program
try {
env.execute("KMeans Flink");
} catch (Exception e) {
e.printStackTrace();
}
}
public static final class MyFilter implements FilterFunction<Tuple2<GeoTimeDataCenter, GeoTimeDataCenter>> {
private static final long serialVersionUID = 5868635346889117617L;
public boolean filter(Tuple2<GeoTimeDataCenter, GeoTimeDataCenter> tuple) throws Exception {
if(tuple.f0.equals(tuple.f1)) {
return true;
}
else {
return false;
}
}
}
。其中，^[a-zA-ZæøåÆØÅ\s\-]*$和a-z是标准英文字母，然后是您想要的额外字符。您可以通过使用不区分大小写的标记来避免重复区分大小写的字符。
或者，您可以对所有字母使用Unicode字母字符类，包括其他语言的特殊字符。 A-Z
答案 1 :(得分：0)
感谢你们的时间，但我发现“^ [a-zA-Z-æøåÆØÅ] + $”的工作方式与我想的完全一样。