solrj实现增量索引

{
SolrInputDocument document = new SolrInputDocument();
document.addField("id", "10");
document.addField("title", "aaahtcvbxcddd");
document.addField("name", "You are my Applege");
document.addField("content_max", "中文分词测试");
document.addField("content_max_2", "中文分词测试");
document.setDocumentBoost(Float.parseFloat(properties.getProperty("TENTH")));
document.addField("*_time", "20151214");
documents.add(document);

UpdateRequest req = new UpdateRequest();
req.add(documents);
req.setParam(UpdateParams.OVERWRITE, Boolean.toString(false));
req.process(server);

//         server.add(documents);
server.optimize();
}