用java删除solr中数据

public class solrTest {
//指定solr服务器的地址

//这里一定不能有# 不然回返回错误的流!
private final static String URL = "http://localhost:8888/solr/coreName//";

//把查询出来的数据全部删除
public static void main(String[] args) {
HttpSolrClient client = new HttpSolrClient(URL);
client.setConnectionTimeout(30000);
client.setDefaultMaxConnectionsPerHost(100);
client.setMaxTotalConnections(100);
client.setSoTimeout(30000);
try {
client.deleteByQuery("*:*");
client.commit();
client.close();
} catch (SolrServerException | IOException e) {
e.printStackTrace();
}

}

}