从Solr Servlet获取数据时编码问题

I have a Solr-Servlet with 600.000 documents, each document contains about 10-30 multivalued fields. In order to upate a document, I´m facing problems because Solr hasn´t any update function in version 3.6. What I want to do: I want to do: I want to have a app, which just need the field, which should be inserted to the document. For example:I have a Solr-Servlet with 600.000 documents, e