此错误正引发在substring方法上,我发现许多线程正在处理此问题,但我遇到的问题似乎有所不同。我知道,如果您的字符串小于子字符串(开头,结尾)的大小,它将引发此错误,但是在将任何内容传递给方法调用之前,都会引发此错误。
我正在运行休眠标准:
public static List<Object[]> baseQuery() throws HibernateException{
Session session = getSession();
Criteria criteria = session.createCriteria(CsvDataEntity.class);
ProjectionList projectionList = Projections.projectionList();
projectionList.add(Projections.property("clearanceMainCat"));
projectionList.add(Projections.property("clearanceDt"));
projectionList.add(Projections.property("vertRadians"));
projectionList.add(Projections.property("latitude"));
criteria.setProjection(projectionList);
List<Object[]> list = criteria.list();
return list;
}
然后我在这里使用查询:
List<Object[]> fullList = baseQuery();
String address = "400 Pine St, Seattle, WA 98101";
String distance = "1";
String years = "8";
//create 'context' for GoogleMaps GeoCode API, geocode user-defined address
GeoApiContext context = new GeoApiContext().setApiKey("Foobar");
GeocodingResult[] result = geocode(context, address).await();
Geometry coordinates = result[0].geometry;
//store user request lat & lng from address supplied from form
double longitude = coordinates.location.lng;
double latitude = coordinates.location.lat;
//user requested distance
double requestedDistanceInMiles = Double.parseDouble(distance);
//list to store all the crimes within the specified distance
List<CrimeModel> crimeList = new ArrayList<>();
for (Object[] record : fullList) {
//verifying crime was commmitted within user-defined distance
Boolean withinDistance = false;
double rowLng = Double.parseDouble((String)record[2]);
double rowLat = Double.parseDouble((String)record[3]);
double milesBetween = (haversineDistance(latitude,rowLat,longitude,rowLng,0,0)) / 1609.34;
if (milesBetween <= requestedDistanceInMiles) {
withinDistance = true;
}
//verifying crime was committed within user-defined time-range
Boolean withinTimeRange =false;
double requestedYears = Double.parseDouble(years);
long requestedDays = Math.round(requestedYears * 365);
String objectDate = (String) record[1];
String recordDateAsString = objectDate.substring(0, 10);
该查询有效,并且它返回的日期+时间字符串肯定超过10个字符。奇怪的是,我在第4行放置了一个断点,进行了调试,查询运行良好,但是随后它在我发布的调用substring()的代码段的底部抛出了错误。换句话说,我的String应该具有必要的长度,但在此错误之前甚至没有传入。有谁知道为什么甚至不执行它就会被抛出?我正在Spring MVC中运行此程序,这是我唯一想到的另一件事,它会导致某些奇怪的情况发生。谢谢。
最佳答案
就像@David Wallace提到的那样,由于数据库太大,因此偶尔会丢失记录,并且在从查询中填充List后,将引发错误。我对它们做了简单的处理以跳过它们(由于缺少记录,需要处理查询中的所有四列),并且一切正常。
//skip null records in database
if (objectDate.length() < 10) {
continue;
} else {
recordDateAsString = objectDate.substring(0, 10);
}
关于java - 模糊的“StringIndexOutOfBoundsException”,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/39482328/