geotools：属性查找

目的：给一个属性名和一个数组，找到该属性里该数组对应的要素值，以一个要素列表的形式返回。

FilterFactory和FilterFactory2的区别。。不都是属性过滤器吗？能接受数组参数吗？

geotools的CQL属性查找规则：

参考1：https://blog.csdn.net/sxausgyy/article/details/8113111（GeoTools应用-Filter_CQL）

参考2：https://blog.csdn.net/oYinHeZhiGuang/article/details/118316074（GeoTools入门（六）-- 查询那点事）

filter：org.geotools.filter

This is most often used when making a Query to retrieve specific Features from a DataStore

cql：common query language

public FeatureCollection filterCQL(FeatureSource<SimpleFeatureType, SimpleFeature> fs,String name) throws CQLException, IOException{ 
        return fs.getFeatures(CQL.toFilter("NAME like '%" + name + "%'")); 
    } 

 public static void main(String[] args) throws IOException, CQLException, SAXException, ParserConfigurationException { 
        FilterExam fe = new FilterExam(); 
        FeatureSource<SimpleFeatureType, SimpleFeature> fs = fe.getFeatureS("D:\\安康公交线_polyline.shp"); 
        FeatureCollection col1 = fe.compareFilterEx(fs); 
        System.out.println(col1.size()); 
        FeatureCollection col2 = fe.filterFidEx(fs); 
        System.out.println(col2.size()); 
        FeatureCollection col3 = fe.filterCQL(fs, "13路"); 
        System.out.println(col3.size()); 
        FeatureCollection col4 = fe.filterXML(fs, "filter.xml"); 
        System.out.println(col4.size()); 
    } 

得到FeatureCollection之后呢？如何保存到shp？

SimpleFeatureIterator itr = featureCollection.features();

得到的是Iterator迭代器。。

 

>>Set：

>>FeatureCollection：

>>arcgis sql属性查询："attName" in ('value1','value2','value3','value4')

>>geoserver wfs查询(filter)：https://www.cnblogs.com/2008nmj/p/16900136.html

>>ECQL：CQL的扩展，支持一些谓词