上期我介绍了geotools读取shp文件的事例 （geotools系列1-读取shp文件），本次说明读取读取postgis里表数据的代码，依旧是读取数据打印出来展示。
1、环境，maven依赖等，参见上次 geotools系列1-读取shp文件 。
2、直接上java代码
package com.jjxliu.geotools.geotools_t1;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.jdbc.JDBCDataStore;
import org.opengis.feature.simple.SimpleFeature;
import org.opengis.filter.Filter;
public class TestPostgis {
public static SimpleFeatureCollection readPostgisTable(String host , int port , String user , String pass , String dbname, String schema , String tablename ){
return readPostgisTable(host, port, user, pass, dbname, schema, tablename , null);
}
public static SimpleFeatureCollection readPostgisTable(String host , int port , String user , String pass , String dbname, String schema , String tablename , Filter filter){
Map params = new HashMap<>();
params.put("dbtype", "postgis");
params.put("host", host);
params.put("port", port);
params.put("schema", schema);
params.put("database", dbname);
params.put("user", user);
params.put("passwd", pass);
try {
JDBCDataStore dataStore = (JDBCDataStore) DataStoreFinder.getDataStore(params);
return readDatastore(dataStore, tablename, filter);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
public static SimpleFeatureCollection readDatastore(JDBCDataStore store ,String typeName , Filter filter){
try {
SimpleFeatureSource featureSource = store.getFeatureSource(typeName);
return filter != null ? featureSource.getFeatures(filter) : featureSource.getFeatures();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
}
3、测试
public static void main(String[] args) {
String host = "127.0.0.1";
String schema = "public" ;
String database = "lyf" ;
String user = "lyf" ;
String pass = "lyf123" ;
String tablename = "cell" ;
int port = 6666;
//读取
SimpleFeatureCollection colls1 = readPostgisTable(host, port, user, pass, database, schema, tablename);
if(colls1 == null){
System.out.println("请检查参数，确保jdbc连接正常以及表存在.");
return;
}
//拿到所有features
SimpleFeatureIterator iters = colls1.features();
//遍历打印
while(iters.hasNext()){
SimpleFeature sf = iters.next();
System.out.println(sf.getID() + " , " + sf.getAttributes());
}
}
结果贴图：
附件有完整代码。
