gpt4 book ai didi

java 中Excel转shape file的实例详解

转载 作者:qq735679552 更新时间:2022-09-28 22:32:09 24 4
gpt4 key购买 nike

CFSDN坚持开源创造价值,我们致力于搭建一个资源共享平台,让每一个IT人在这里找到属于你的精彩世界.

这篇CFSDN的博客文章java 中Excel转shape file的实例详解由作者收集整理,如果你对这篇文章有兴趣,记得点赞哟.

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:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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" );
   }
}

说明:

1、转换仅限点对象的转换; 2、保留所有excel相关的属性,lon、lat字段是必须要有的; 3、对于中文字段,做了取首字母的处理; 。

 如有疑问请留言或者到本站社区交流讨论,感谢阅读,希望能帮助到大家,谢谢大家对本站的支持! 。

原文链接:http://blog.csdn.net/gisshixisheng/article/details/77877031 。

最后此篇关于java 中Excel转shape file的实例详解的文章就讲到这里了,如果你想了解更多关于java 中Excel转shape file的实例详解的内容请搜索CFSDN的文章或继续浏览相关文章,希望大家以后支持我的博客! 。

24 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com