java 中excel轉shape file的實例詳解
概述：
本文講述如何結合geotools和poi實現excel到shp的轉換，再結合前文shp到geojson數據的轉換，即可實現用戶上傳excel數據并在web端的展示功能。
截圖：
原始excel文件
運行耗時
運行結果
代碼：
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package com.lzugis.geotools;import com.lzugis.commonmethod;import com.vividsolutions.jts.geom.coordinate;import com.vividsolutions.jts.geom.geometryfactory;import com.vividsolutions.jts.geom.point;import org.apache.poi.hssf.usermodel.hssfcell;import org.apache.poi.hssf.usermodel.hssfrow;import org.apache.poi.hssf.usermodel.hssfsheet;import org.apache.poi.hssf.usermodel.hssfworkbook;import org.apache.poi.poifs.filesystem.poifsfilesystem;import org.geotools.data.featurewriter;import org.geotools.data.transaction;import org.geotools.data.shapefile.shapefiledatastore;import org.geotools.data.shapefile.shapefiledatastorefactory;import org.geotools.feature.simple.simplefeaturetypebuilder;import org.geotools.referencing.crs.defaultgeographiccrs;import org.opengis.feature.simple.simplefeature;import org.opengis.feature.simple.simplefeaturetype;import java.io.file;import java.io.fileinputstream;import java.io.inputstream;import java.io.serializable;import java.nio.charset.charset;import java.util.arraylist;import java.util.hashmap;import java.util.list;import java.util.map;/** * created by admin on 2017/9/6. */public class xls2shape { static xls2shape xls2shp = new xls2shape(); private static string rootpath = system.getproperty("user.dir"); private commonmethod cm = new commonmethod(); private hssfsheet sheet; private class getcelltype(hssfcell cell) { if (cell.getcelltype() == hssfcell.cell_type_string) { return string.class; } else if (cell.getcelltype() == hssfcell.cell_type_numeric) { return double.class; } else { return string.class; } } private object getcellvalue(hssfcell cell) { if (cell.getcelltype() == hssfcell.cell_type_string) { return cell.getrichstringcellvalue().getstring(); } else if (cell.getcelltype() == hssfcell.cell_type_numeric) { return cell.getnumericcellvalue(); } else { return ""; } } private list<map<string, object>> getexcelheader() { list<map<string, object>> list = new arraylist(); hssfrow header = sheet.getrow(0); hssfrow value = sheet.getrow(1); //獲取總列數 int colnum = header.getphysicalnumberofcells(); for (int i = 0; i < colnum; i++) { hssfcell cellfield = header.getcell(i); hssfcell cellvalue = value.getcell(i); string fieldname = cellfield.getrichstringcellvalue().getstring(); fieldname = cm.getpinyinheadchar(fieldname); class fieldtype = getcelltype(cellvalue); map<string, object> map = new hashmap<string, object>(); map.put("name", fieldname); map.put("type", fieldtype); list.add(map); } return list; } public void excel2shape(string xlsfile, string shppath) { poifsfilesystem fs; hssfworkbook wb; hssfrow row; try { inputstream is = new fileinputstream(xlsfile); fs = new poifsfilesystem(is); wb = new hssfworkbook(fs); sheet = wb.getsheetat(0); //獲取總列數 int colnum = sheet.getrow(0).getphysicalnumberofcells(); // 得到總行數 int rownum = sheet.getlastrownum(); list list = getexcelheader(); //創建shape文件對象 file file = new file(shppath); map<string, serializable> params = new hashmap<string, serializable>(); params.put(shapefiledatastorefactory.urlp.key, file.touri().tourl()); shapefiledatastore ds = (shapefiledatastore) new shapefiledatastorefactory().createnewdatastore(params); //定義圖形信息和屬性信息 simplefeaturetypebuilder tb = new simplefeaturetypebuilder(); tb.setcrs(defaultgeographiccrs.wgs84); tb.setname("shapefile"); tb.add("the_geom", point.class); for (int i = 0; i < list.size(); i++) { map<string, object> map = (map<string, object>) list.get(i); tb.add(map.get("name").tostring(), (class) map.get("type")); } ds.createschema(tb.buildfeaturetype()); //設置編碼 charset charset = charset.forname("gbk"); ds.setcharset(charset); //設置writer featurewriter<simplefeaturetype, simplefeature> writer = ds.getfeaturewriter(ds.gettypenames()[0], transaction.auto_commit); //寫下一條 simplefeature feature = null; for (int i = 1; i < rownum; i++) { row = sheet.getrow(i); feature = writer.next(); map maplonlat = new hashmap(); for (int j = 0; j < colnum; j++) { hssfcell cell = row.getcell(j); map<string, object> mapfields = (map<string, object>) list.get(j); string fieldname = mapfields.get("name").tostring(); feature.setattribute(fieldname, getcellvalue(cell)); if (fieldname.tolowercase().equals("lon") || fieldname.tolowercase().equals("lat")) { maplonlat.put(fieldname, getcellvalue(cell)); } } feature.setattribute("the_geom", new geometryfactory().createpoint(new coordinate((double) maplonlat.get("lon"), (double) maplonlat.get("lat")))); } writer.write(); writer.close(); ds.dispose(); } catch (exception e) { e.printstacktrace(); } } public static void main(string[] args) { long start = system.currenttimemillis(); string xlspath = rootpath + "/data/xls/capital.xls", shppath = rootpath + "/out/capital.shp"; xls2shp.excel2shape(xlspath, shppath); system.out.println("共耗時" + (system.currenttimemillis() - start) + "ms"); }} |
說明：
1、轉換僅限點對象的轉換；
2、保留所有excel相關的屬性，lon、lat字段是必須要有的；
3、對于中文字段，做了取首字母的處理；
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原文鏈接：http://blog.csdn.net/gisshixisheng/article/details/77877031
