GeoTools是ArcGis地图与java对象的桥梁，恰如jdbc之于oracle与java。
shp文件本身是存有地理对象边界坐标、对象中心城市及城市编号的多多边形字符串。
需要使用的依赖如下
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<!-- 添加GeoTools依赖 -->
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-shapefile</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>org.geotools</groupId>
<artifactId>gt-swing</artifactId>
<version>${geotools.version}</version>
</dependency>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.47</version>
</dependency>
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对象：
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public class CutProperty {
private String province;
private int x;
private int y;
/**
* 图片宽
* */
private int width;
/**
* 图片高
* */
private int height;
/**
* 画图时线条粗细
* */
private float weight;
/**
* 地图坐标右边界
* */
private int rightborder;
/**
* 地图坐标放大倍数
* */
private int bei;
/**
* 文字大小
* */
private int stringsize;
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来自@author yukun24@126.com的工具类，读取shp文件：
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package com.gwhn.geotools;
import org.geotools.data.FeatureWriter;
import org.geotools.data.FileDataStoreFactorySpi;
import org.geotools.data.Transaction;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.data.shapefile.ShapefileDataStoreFactory;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.feature.FeatureCollection;
import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
import org.geotools.referencing.crs.DefaultGeographicCRS;
import org.junit.Test;
import org.locationtech.jts.geom.*;
import org.opengis.feature.Property;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.feature.simple.SimpleFeatureType;
import java.io.File;
import java.io.Serializable;
import java.nio.charset.Charset;
import java.util.*;
public class ShapeUtil {
//读shp文件【几何信息+属性信息】
public List<Property> SHPRead(String path) throws Exception {
List<Property> propertyList = new ArrayList<>();
//基于上面新建的shapfile文件，进行读取
//构建shapefile数据存储的实例
ShapefileDataStoreFactory dataStoreFactory = new ShapefileDataStoreFactory();
//基于路径构建文件对象
File file = new File(path);
//构建一个已存在的shapfile数据源
//ShapefileDataStore:数据存储实现，允许从Shapefiles读取和写入
ShapefileDataStore ds = (ShapefileDataStore) dataStoreFactory.createDataStore(file.toURI().toURL());
//设置编码，防止中文读取乱码
ds.setCharset(Charset.forName("UTF-8"));
//getFeatureSource():ContentFeatureSource
//这个特性是由 FeatureCollection提供的操作完成的。单独的特征记忆实现由子类提供:
//SimpleFeatureSource特征资源明确地使用FeatureCollection【集合】，可迭代
SimpleFeatureSource featureSource = ds.getFeatureSource();
//getFeatures():以FeatureCollection的形式检索所有特性。
//一个用于处理FeatureCollection的实用工具类。提供一个获取FeatureCollection实例的机制
FeatureCollection<SimpleFeatureType, SimpleFeature> result = featureSource.getFeatures();
System.out.println("几何对象总共有：" + result.size());
//features():返回一个FeatureIterator迭代器
SimpleFeatureIterator it = (SimpleFeatureIterator) result.features();
while (it.hasNext()) {
SimpleFeature feature = it.next();
//迭代属性【属性我们可以理解为一个几何对象的属性节点，也就是对一个几何图形的描述字段】
Iterator<Property> ip = feature.getProperties().iterator();
// System.out.println("========================");
//再来个while
while (ip.hasNext()) {
Property pro = ip.next();
// System.out.println(pro.getName()+" = "+pro.getValue());
propertyList.add(pro);
}//end 属性迭代
}
it.close();
return propertyList;
}
}
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来自@author yukun24@126.com的工具类，此处用来将shp中获取的字符串转化为多多边形对象MultiPolygon
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