JAVA使用geotools讀取shape格式文件的方法
更新時間：2020年03月25日 17:04:48 作者：摘星族
這篇文章主要介紹了JAVA使用geotools讀取shape格式文件的方法，本文通過實例代碼給大家介紹的非常詳細，對大家的學(xué)習(xí)或工作具有一定的參考借鑒價值，需要的朋友可以參考下
先看下JAVA用geotools讀取shape格式文件
Shapefile屬于一種矢量圖形格式，它能夠保存幾何圖形的位置及相關(guān)屬性。但這種格式?jīng)]法存儲地理數(shù)據(jù)的拓?fù)湫畔ⅰ?/p>
其中，要組成一個Shapefile，有三個文件是必不可少的，它們分別是".shp", ".shx"與 ".dbf"文件
- .shp— 圖形格式，用于保存元素的幾何實體。
- .shx— 圖形索引格式。幾何體位置索引，記錄每一個幾何體在shp文件之中的位置，能夠加快向前或向后搜索一個幾何體的效率。
- .dbf— 屬性數(shù)據(jù)格式，以dBase IV的數(shù)據(jù)表格式存儲每個幾何形狀的屬性數(shù)據(jù)。
下面將介紹如何通過Java讀取Shape文件中的內(nèi)容信息
我們的pom文件
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.herbert.geotool</groupId> <artifactId>geo</artifactId> <version>1.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-shapefile</artifactId> <version>19.2</version> <scope>system</scope> </dependency> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-opengis</artifactId> <version>19.2</version> </dependency> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-data</artifactId> <version>19.2</version> </dependency> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-api</artifactId> <version>19.2</version> </dependency> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-main</artifactId> <version>19.2</version> </dependency> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-metadata</artifactId> <version>19.2</version> </dependency> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-referencing</artifactId> <version>19.2</version> </dependency> <dependency> <groupId>org.geotools</groupId> <artifactId>gt-geojson</artifactId> <version>19.2</version> </dependency> <dependency> <groupId>org.json.simple</groupId> <artifactId>json-simple</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool</artifactId> <version>1.5.4</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>com.vividsolutions</groupId> <artifactId>jts</artifactId> <version>1.13</version> </dependency> </dependencies> </project>
具體Java代碼
package com.herbert.geotoool.util;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.geojson.feature.FeatureJSON;
import org.opengis.feature.simple.SimpleFeature;
import java.io.File;
import java.io.IOException;
import java.io.StringWriter;
import java.nio.charset.Charset;
/**
* @author ：Herbert
* @date ：Created in 2019/12/26 17:01
* @description：
* @modified By：
* @version: $
*/
public class ShapeModel {
public static void main(String[] args) throws IOException {
long start = System.currentTimeMillis();
String SHAPE_FILE = "F:\\MapData\\gisMap\\xian\\街道界線.shp"; // ShapeFile全路徑
// 使用GeoTools讀取ShapeFile文件
File shapeFile = new File(SHAPE_FILE);
ShapefileDataStore store = new ShapefileDataStore(shapeFile.toURI().toURL());
//設(shè)置編碼
Charset charset = Charset.forName("GBK");
store.setCharset(charset);
SimpleFeatureSource sfSource = store.getFeatureSource();
SimpleFeatureIterator sfIter = sfSource.getFeatures().features();
// 從ShapeFile文件中遍歷每一個Feature，然后將Feature轉(zhuǎn)為GeoJSON字符串
while (sfIter.hasNext()) {
SimpleFeature feature = (SimpleFeature) sfIter.next();
// Feature轉(zhuǎn)GeoJSON
FeatureJSON fjson = new FeatureJSON();
StringWriter writer = new StringWriter();
fjson.writeFeature(feature, writer);
String sjson = writer.toString();
System.out.println("sjson===== >>>> " + sjson);
}
System.out.println("數(shù)據(jù)導(dǎo)入完成，共耗時"+(System.currentTimeMillis() - start)+"ms");
}
}
讀取數(shù)據(jù)顯示：
補充：JAVA 根據(jù)數(shù)據(jù)庫表內(nèi)容生產(chǎn)樹結(jié)構(gòu)JSON數(shù)據(jù)的實例代碼
1、利用場景
組織機構(gòu)樹，通常會有組織機構(gòu)表，其中有code(代碼),pcode(上級代碼),name(組織名稱)等字段
2、構(gòu)造數(shù)據(jù)（以下數(shù)據(jù)并不是組織機構(gòu)數(shù)據(jù)，而純屬本人胡編亂造的數(shù)據(jù)）
List<Tree<Test>> trees = new ArrayList<Tree<Test>>();
tests.add(new Test("0", "", "關(guān)于本人"));
tests.add(new Test("1", "0", "技術(shù)學(xué)習(xí)"));
tests.add(new Test("2", "0", "興趣"));
tests.add(new Test("3", "1", "JAVA"));
tests.add(new Test("4", "1", "oracle"));
tests.add(new Test("5", "1", "spring"));
tests.add(new Test("6", "1", "springmvc"));
tests.add(new Test("7", "1", "fastdfs"));
tests.add(new Test("8", "1", "linux"));
tests.add(new Test("9", "2", "騎行"));
tests.add(new Test("10", "2", "吃喝玩樂"));
tests.add(new Test("11", "2", "學(xué)習(xí)"));
tests.add(new Test("12", "3", "String"));
tests.add(new Test("13", "4", "sql"));
tests.add(new Test("14", "5", "ioc"));
tests.add(new Test("15", "5", "aop"));
tests.add(new Test("16", "1", "等等"));
tests.add(new Test("17", "2", "等等"));
tests.add(new Test("18", "3", "等等"));
tests.add(new Test("19", "4", "等等"));
tests.add(new Test("20", "5", "等等"));
3、源碼
Tree.java
package pers.kangxu.datautils.bean.tree;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import com.alibaba.fastjson.JSON;
/**
* tree TODO <br>
*
* @author kangxu2 2017-1-7
*
*/
public class Tree<T> {
/**
* 節(jié)點ID
*/
private String id;
/**
* 顯示節(jié)點文本
*/
private String text;
/**
* 節(jié)點狀態(tài)，open closed
*/
private String state = "open";
/**
* 節(jié)點是否被選中 true false
*/
private boolean checked = false;
/**
* 節(jié)點屬性
*/
private List<Map<String, Object>> attributes;
/**
* 節(jié)點的子節(jié)點
*/
private List<Tree<T>> children = new ArrayList<Tree<T>>();
/**
* 父ID
*/
private String parentId;
/**
* 是否有父節(jié)點
*/
private boolean isParent = false;
/**
* 是否有子節(jié)點
*/
private boolean isChildren = false;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public boolean isChecked() {
return checked;
}
public void setChecked(boolean checked) {
this.checked = checked;
}
public List<Map<String, Object>> getAttributes() {
return attributes;
}
public void setAttributes(List<Map<String, Object>> attributes) {
this.attributes = attributes;
}
public List<Tree<T>> getChildren() {
return children;
}
public void setChildren(List<Tree<T>> children) {
this.children = children;
}
public boolean isParent() {
return isParent;
}
public void setParent(boolean isParent) {
this.isParent = isParent;
}
public boolean isChildren() {
return isChildren;
}
public void setChildren(boolean isChildren) {
this.isChildren = isChildren;
}
public String getParentId() {
return parentId;
}
public void setParentId(String parentId) {
this.parentId = parentId;
}
public Tree(String id, String text, String state, boolean checked,
List<Map<String, Object>> attributes, List<Tree<T>> children,
boolean isParent, boolean isChildren, String parentID) {
super();
this.id = id;
this.text = text;
this.state = state;
this.checked = checked;
this.attributes = attributes;
this.children = children;
this.isParent = isParent;
this.isChildren = isChildren;
this.parentId = parentID;
}
public Tree() {
super();
}
@Override
public String toString() {
return JSON.toJSONString(this);
}
}
BuildTree.java
package pers.kangxu.datautils.common.tree;
import java.util.ArrayList;
import java.util.List;
import pers.kangxu.datautils.bean.tree.Tree;
/**
* 構(gòu)建tree
* TODO
* <br>
* @author kangxu2 2017-1-7
*
*/
public class BuildTree {
/**
*
* TODO
* <br>
* @author kangxu2 2017-1-7
*
* @param nodes
* @return
*/
public static <T> Tree<T> build(List<Tree<T>> nodes) {
if(nodes == null){
return null;
}
List<Tree<T>> topNodes = new ArrayList<Tree<T>>();
for (Tree<T> children : nodes) {
String pid = children.getParentId();
if (pid == null || "".equals(pid)) {
topNodes.add(children);
continue;
}
for (Tree<T> parent : nodes) {
String id = parent.getId();
if (id != null && id.equals(pid)) {
parent.getChildren().add(children);
children.setParent(true);
parent.setChildren(true);
continue;
}
}
}
Tree<T> root = new Tree<T>();
if (topNodes.size() == 0) {
root = topNodes.get(0);
} else {
root.setId("-1");
root.setParentId("");
root.setParent(false);
root.setChildren(true);
root.setChecked(true);
root.setChildren(topNodes);
root.setText("頂級節(jié)點");
}
return root;
}
}
BuildTreeTester.java
package pers.kangxu.datautils.test;
import java.util.ArrayList;
import java.util.List;
import pers.kangxu.datautils.bean.tree.Tree;
import pers.kangxu.datautils.common.tree.BuildTree;
public class BuildTreeTester {
public static void main(String[] args) {
List<Tree<Test>> trees = new ArrayList<Tree<Test>>();
List<Test> tests = new ArrayList<Test>();
tests.add(new Test("0", "", "關(guān)于本人"));
tests.add(new Test("1", "0", "技術(shù)學(xué)習(xí)"));
tests.add(new Test("2", "0", "興趣"));
tests.add(new Test("3", "1", "JAVA"));
tests.add(new Test("4", "1", "oracle"));
tests.add(new Test("5", "1", "spring"));
tests.add(new Test("6", "1", "springmvc"));
tests.add(new Test("7", "1", "fastdfs"));
tests.add(new Test("8", "1", "linux"));
tests.add(new Test("9", "2", "騎行"));
tests.add(new Test("10", "2", "吃喝玩樂"));
tests.add(new Test("11", "2", "學(xué)習(xí)"));
tests.add(new Test("12", "3", "String"));
tests.add(new Test("13", "4", "sql"));
tests.add(new Test("14", "5", "ioc"));
tests.add(new Test("15", "5", "aop"));
tests.add(new Test("16", "1", "等等"));
tests.add(new Test("17", "2", "等等"));
tests.add(new Test("18", "3", "等等"));
tests.add(new Test("19", "4", "等等"));
tests.add(new Test("20", "5", "等等"));
for (Test test : tests) {
Tree<Test> tree = new Tree<Test>();
tree.setId(test.getId());
tree.setParentId(test.getPid());
tree.setText(test.getText());
trees.add(tree);
}
Tree<Test> t = BuildTree.build(trees);
System.out.println(t);
}
}
class Test {
private String id;
private String pid;
private String text;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getPid() {
return pid;
}
public void setPid(String pid) {
this.pid = pid;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
public Test(String id, String pid, String text) {
super();
this.id = id;
this.pid = pid;
this.text = text;
}
public Test() {
super();
}
@Override
public String toString() {
return "Test [id=" + id + ", pid=" + pid + ", text=" + text + "]";
}
}
4、運行結(jié)果
JSON數(shù)據(jù)：
{
"checked": true,
"children": [
{
"checked": false,
"children": [
{
"checked": false,
"children": [
{
"checked": false,
"children": [
{
"checked": false,
"children": [],
"id": "12",
"parent": true,
"parentId": "3",
"state": "open",
"text": "String"
},
{
"checked": false,
"children": [],
"id": "18",
"parent": true,
"parentId": "3",
"state": "open",
"text": "等等"
}
],
"id": "3",
"parent": true,
"parentId": "1",
"state": "open",
"text": "JAVA"
},
{
"checked": false,
"children": [
{
"checked": false,
"children": [],
"id": "13",
"parent": true,
"parentId": "4",
"state": "open",
"text": "sql"
},
{
"checked": false,
"children": [],
"id": "19",
"parent": true,
"parentId": "4",
"state": "open",
"text": "等等"
}
],
"id": "4",
"parent": true,
"parentId": "1",
"state": "open",
"text": "oracle"
},
{
"checked": false,
"children": [
{
"checked": false,
"children": [],
"id": "14",
"parent": true,
"parentId": "5",
"state": "open",
"text": "ioc"
},
{
"checked": false,
"children": [],
"id": "15",
"parent": true,
"parentId": "5",
"state": "open",
"text": "aop"
},
{
"checked": false,
"children": [],
"id": "20",
"parent": true,
"parentId": "5",
"state": "open",
"text": "等等"
}
],
"id": "5",
"parent": true,
"parentId": "1",
"state": "open",
"text": "spring"
},
{
"checked": false,
"children": [],
"id": "6",
"parent": true,
"parentId": "1",
"state": "open",
"text": "springmvc"
},
{
"checked": false,
"children": [],
"id": "7",
"parent": true,
"parentId": "1",
"state": "open",
"text": "fastdfs"
},
{
"checked": false,
"children": [],
"id": "8",
"parent": true,
"parentId": "1",
"state": "open",
"text": "linux"
},
{
"checked": false,
"children": [],
"id": "16",
"parent": true,
"parentId": "1",
"state": "open",
"text": "等等"
}
],
"id": "1",
"parent": true,
"parentId": "0",
"state": "open",
"text": "技術(shù)學(xué)習(xí)"
},
{
"checked": false,
"children": [
{
"checked": false,
"children": [],
"id": "9",
"parent": true,
"parentId": "2",
"state": "open",
"text": "騎行"
},
{
"checked": false,
"children": [],
"id": "10",
"parent": true,
"parentId": "2",
"state": "open",
"text": "吃喝玩樂"
},
{
"checked": false,
"children": [],
"id": "11",
"parent": true,
"parentId": "2",
"state": "open",
"text": "學(xué)習(xí)"
},
{
"checked": false,
"children": [],
"id": "17",
"parent": true,
"parentId": "2",
"state": "open",
"text": "等等"
}
],
"id": "2",
"parent": true,
"parentId": "0",
"state": "open",
"text": "興趣"
}
],
"id": "0",
"parent": false,
"parentId": "",
"state": "open",
"text": "關(guān)于本人"
}
],
"id": "-1",
"parent": false,
"parentId": "",
"state": "open",
"text": "頂級節(jié)點"
}
總結(jié)
到此這篇關(guān)于JAVA使用geotools讀取shape格式文件的方法的文章就介紹到這了,更多相關(guān)java geotools讀取shape格式內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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