java 中Excel转shape file的实例详解_Java教程

java 中excel转shape file的实例详解

概述：

本文讲述如何结合geotools和poi实现excel到shp的转换，再结合前文shp到geojson数据的转换，即可实现用户上传excel数据并在web端的展示功能。

截图：

java 中Excel转shape file的实例详解

原始excel文件

java 中Excel转shape file的实例详解

运行耗时

java 中Excel转shape file的实例详解

运行结果

代码：

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

									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);

									    //获取总列数

									    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);

									      //获取总列数

									      int colnum = sheet.getrow(0).getphysicalnumberofcells();

									      // 得到总行数

									      int rownum = sheet.getlastrownum();

									      list list = getexcelheader();

									      //创建shape文件对象

									      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);

									      //定义图形信息和属性信息

									      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());

									      //设置编码

									      charset charset = charset.forname("gbk");

									      ds.setcharset(charset);

									      //设置writer

									      featurewriter<simplefeaturetype, simplefeature> writer = ds.getfeaturewriter(ds.gettypenames()[0], transaction.auto_commit);

									      //写下一条

									      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("共耗时" + (system.currenttimemillis() - start) + "ms");

									  }

									}