geoserver通过rest自动发布postigs图层的java示例，类型是application/json的

这里是一个使用Java代码发布PostGIS图层到GeoServer的示例：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class GeoServerRest {

    public static void main(String[] args) throws IOException {

        String geoServerUrl = "http://localhost:8080/geoserver";
        String workspace = "workspace_name";
        String storeName = "store_name";
        String layerName = "layer_name";
        String postgisHost = "localhost";
        String postgisPort = "5432";
        String postgisDatabase = "database_name";
        String postgisSchema = "public";
        String postgisUser = "username";
        String postgisPass = "password";

        // Create JSON payload for the new data store
        String dataStorePayload = "{\n" +
                "    \"dataStore\": {\n" +
                "        \"name\": \"" + storeName + "\",\n" +
                "        \"connectionParameters\": {\n" +
                "            \"host\": \"" + postgisHost + "\",\n" +
                "            \"port\": \"" + postgisPort + "\",\n" +
                "            \"database\": \"" + postgisDatabase + "\",\n" +
                "            \"schema\": \"" + postgisSchema + "\",\n" +
                "            \"user\": \"" + postgisUser + "\",\n" +
                "            \"passwd\": \"" + postgisPass + "\",\n" +
                "            \"dbtype\": \"postgis\",\n" +
                "            \"max connections\": \"10\",\n" +
                "            \"min connections\": \"1\",\n" +
                "            \"fetch size\": \"1000\",\n" +
                "            \"Expose primary keys\": \"true\",\n" +
                "            \"Estimated extends\": \"true\",\n" +
                "            \"Connection timeout\": \"20\",\n" +
                "            \"validate connections\": \"true\",\n" +
                "            \"validate connections interval\": \"300\",\n" +
                "            \"preparedStatements\": \"false\",\n" +
                "            \"Support on the fly geometry simplification\": \"false\",\n" +
                "            \"JDBC virtual table name\": \"\",\n" +
                "            \"Loose bbox\": \"true\",\n" +
                "            \"Estimated extends factor\": \"0.1\",\n" +
                "            \"Fetch size\": \"1000\",\n" +
                "            \"Max open prepared statements\": \"50\",\n" +
                "            \"Min time between eviction runs millis\": \"5000\",\n" +
                "            \"Num tests per eviction run\": \"3\",\n" +
                "            \"Remove abandoned\": \"true\",\n" +
                "            \"Remove abandoned timeout\": \"300\"\n" +
                "        }\n" +
                "    }\n" +
                "}";

        // Create JSON payload for the new layer
        String layerPayload = "{\n" +
                "    \"featureType\": {\n" +
                "        \"name\": \"" + layerName + "\",\n" +
                "        \"nativeName\": \"" + layerName + "\",\n" +
                "        \"title\": \"" + layerName + "\",\n" +
                "        \"srs\": \"EPSG:4326\",\n" +
                "        \"nativeCRS\": \"EPSG:4326\",\n" +
                "        \"enabled\": true,\n" +
                "        \"advertised\": true,\n" +
                "        \"metadata\": {\n" +
                "            \"entry\": [\n" +
                "                {\n" +
                "                    \"@key\": \"cachingEnabled\",\n" +
                "                    \"$\": false\n" +
                "                },\n" +
                "                {\n" +
                "                    \"@key\": \"jai.enabled\",\n" +
                "                    \"$\": true\n" +
                "                },\n" +
                "                {\n" +
                "                    \"@key\": \"time\",\n" +
                "                    \"$\": \"2015-05-14T10:36:11.672Z\"\n" +
                "                }\n" +
                "            ]\n" +
                "        },\n" +
                "        \"store\": {\n" +
                "            \"@class\": \"dataStore\",\n" +
                "            \"name\": \"" + storeName + "\",\n" +
                "            \"href\": \"" + geoServerUrl + "/rest/workspaces/" + workspace + "/datastores/" + storeName + ".json\"\n" +
                "        },\n" +
                "        \"maxFeatures\": 0,\n" +
                "        \"numDecimals\": 0,\n" +
                "        \"overridingServiceSRS\": false,\n" +
                "        \"skipNumberMatched\": false,\n" +
                "        \"circularArcPresent\": false,\n" +
                "        \"attributes\": {\n" +
                "            \"attribute\": [\n" +
                "                {\n" +
                "                    \"name\": \"id\",\n" +
                "                    \"minOccurs\": 0,\n" +
                "                    \"maxOccurs\": 1,\n" +
                "                    \"nillable\": true,\n" +
                "                    \"binding\": \"java.lang.Integer\",\n" +
                "                    \"length\": 10,\n" +
                "                    \"precision\": null,\n" +
                "                    \"defaultValue\": {\n" +
                "                        \"$\": \"nextval('" + layerName + "_id_seq'::regclass)\",\n" +
                "                        \"@type\": \"xsd:string\"\n" +
                "                    }\n" +
                "                }\n" +
                "            ]\n" +
                "        },\n" +
                "        \"nativeBoundingBox\": {\n" +
                "            \"minx\": -180.0,\n" +
                "            \"maxx\": 180.0,\n" +
                "            \"miny\": -90.0,\n" +
                "            \"maxy\": 90.0,\n" +
                "            \"crs\": \"EPSG:4326\"\n" +
                "        },\n" +
                "        \"latLonBoundingBox\": {\n" +
                "            \"minx\": -180.0,\n" +
                "            \"maxx\": 180.0,\n" +
                "            \"miny\": -90.0,\n" +
                "            \"maxy\": 90.0,\n" +
                "            \"crs\": \"EPSG:4326\"\n" +
                "        },\n" +
                "        \"projectionPolicy\": \"FORCE_DECLARED\",\n" +
                "        \"enabledWMS\": false,\n" +
                "        \"circularArcPresent\": false,\n" +
                "        \"forcedDecimal\": false,\n" +
                "        \"styleName\": \"generic\"\n" +
                "    }\n" +
                "}";

        // Publish the new data store
        URL dataStoreUrl = new URL(geoServerUrl + "/rest/workspaces/" + workspace + "/datastores.json");
        HttpURLConnection dataStoreConn = (HttpURLConnection) dataStoreUrl.openConnection();
        dataStoreConn.setRequestMethod("POST");
        dataStoreConn.setDoOutput(true);
        dataStoreConn.setRequestProperty("Content-Type", "application/json");
        OutputStream dataStoreOutStream = dataStoreConn.getOutputStream();
        dataStoreOutStream.write(dataStorePayload.getBytes());
        dataStoreOutStream.flush();

        // Get the response from the data store publish request
        BufferedReader dataStoreReader = new BufferedReader(new InputStreamReader(dataStoreConn.getInputStream()));
        String dataStoreResponse;
        while ((dataStoreResponse = dataStoreReader.readLine()) != null) {
            System.out.println(dataStoreResponse);
        }
        dataStoreReader.close();
        dataStoreOutStream.close();
        dataStoreConn.disconnect();

        // Publish the new layer
        URL layerUrl = new URL(geoServerUrl + "/rest/workspaces/" + workspace + "/datastores/" + storeName + "/featuretypes.json");
        HttpURLConnection layerConn = (HttpURLConnection) layerUrl.openConnection();
        layerConn.setRequestMethod("POST");
        layerConn.setDoOutput(true);
        layerConn.setRequestProperty("Content-Type", "application/json");
        OutputStream layerOutStream = layerConn.getOutputStream();
        layerOutStream.write(layerPayload.getBytes());
        layerOutStream.flush();

        // Get the response from the layer publish request
        BufferedReader layerReader = new BufferedReader(new InputStreamReader(layerConn.getInputStream()));
        String layerResponse;
        while ((layerResponse = layerReader.readLine()) != null) {
            System.out.println(layerResponse);
        }
        layerReader.close();
        layerOutStream.close();
        layerConn.disconnect();
    }
}

请注意，此示例假定您已经在GeoServer中设置了PostGIS数据存储，并且您已经将所需的PostGIS驱动程序文件放置在GeoServer的类路径中。