java geojson入库

Java中可以使用GeoTools库将GeoJSON数据导入到数据库中。下面是一个简单的步骤：

1. 首先，确保你已经将GeoTools库添加到你的Java项目中。

2. 导入所需的类:

import org.geotools.data.DataStore;
import org.geotools.data.DataStoreFinder;
import org.geotools.data.Transaction;
import org.geotools.data.collection.CollectionFeatureSource;
import org.geotools.data.simple.SimpleFeatureStore;
import org.geotools.geojson.feature.FeatureJSON;
import org.opengis.feature.simple.SimpleFeature;
import java.io.File;
import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Map;

3. 创建一个方法来导入GeoJSON数据到数据库中:

public void importGeoJsonToDatabase(String geoJsonFilePath, String databaseTypeName, String databaseUrl, String tableName) {
    try {
        // 读取GeoJSON文件
        File geoJsonFile = new File(geoJsonFilePath);
        FileInputStream inputStream = new FileInputStream(geoJsonFile);

        // 创建FeatureJSON对象
        FeatureJSON featureJSON = new FeatureJSON();

        // 将GeoJSON文件解析为SimpleFeature对象
        SimpleFeature feature = (SimpleFeature) featureJSON.readFeature(inputStream);

        // 创建数据源
        Map<String, Object> params = new HashMap<>();
        params.put("dbtype", databaseTypeName);
        params.put("host", databaseUrl);
        DataStore dataStore = DataStoreFinder.getDataStore(params);

        // 获取要导入数据的目标表
        SimpleFeatureStore featureStore = (SimpleFeatureStore) dataStore.getFeatureSource(tableName);

        // 开始事务
        Transaction transaction = new DefaultTransaction();
        featureStore.setTransaction(transaction);

        try {
            // 导入数据
            featureStore.addFeatures(DataUtilities.collection(feature));

            // 提交事务
            transaction.commit();
        } catch (Exception e) {
            // 回滚事务
            transaction.rollback();
            e.printStackTrace();
        } finally {
            // 关闭数据源
            transaction.close();
            dataStore.dispose();
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

4. 调用方法进行导入:

importGeoJsonToDatabase("path/to/geojson/file.json", "postgis", "localhost:5432/database", "tableName");