打开与 CouchDB 的连接
HttpClient httpClient = new StdHttpClient.Builder().
url("http://yourcouchdbhost:5984").
username("admin").
password("password").
build();
CouchDbInstance dbInstance = new StdCouchDbInstance(httpClient);
HttpClient httpClient = new StdHttpClient.Builder().
url("http://yourcouchdbhost:5984").
username("admin").
password("password").
build();
CouchDbInstance dbInstance = new StdCouchDbInstance(httpClient);