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[ASP.net教程]通过Http接口及SolrNet 两种方法基于Solr5.5.1 实现CURD


前言

       老规矩,任何技术的入门我通常都会总结增删改查,本文我就通过HttpWebRequest和SolrNet的方式实现Solr最基础的增删改查(CURD)。对于自己的完整项目,同时不想过于依赖第三方类库的则通过Http接口的方式来调用Solr。 当然也有人喜欢调用第三方的类库,简单方便,不需要自己处理太多繁琐的细节就可以轻松调用solr来实现自己的业务逻辑。 

      

Http接口实现

private static void Query()    {            string url = "http://localhost:8080/solr/univeral/select?indent=on&q=title:魔兽&wt=json";      WebRequest request = WebRequest.Create(url);      request.Method = "GET";      WebResponse response = request.GetResponse();      Stream stream = response.GetResponseStream();      using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))      {        string strJson = reader.ReadToEnd();        Console.WriteLine(strJson);      }    }    private static void Index()    {      string url = "http://localhost:8080/solr/univeral/update?_=1466592530544&wt=json&commit=true";      string strData = @"<add>        <doc>          <field name='id'>2</field>          <field name='title'>平凡的世界(根据路遥同名小说改变)</field>          <field name='author'>路遥</field>        </doc>      </add>";      byte[] bytes;      bytes = System.Text.Encoding.UTF8.GetBytes(strData);      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);      request.Method = "POST";      request.Accept = "*/*";      request.ContentLength = bytes.Length;      request.ContentType = "text/";      Stream requestStream = request.GetRequestStream();      requestStream.Write(bytes,0,bytes.Length);      requestStream.Close();      HttpWebResponse response = (HttpWebResponse)request.GetResponse();      if (response.StatusCode == HttpStatusCode.OK)      {        Stream responseStream = response.GetResponseStream();        string strJson = new StreamReader(responseStream).ReadToEnd();        Console.WriteLine(strJson);      }          }    private static void Delete()    {      string url = "http://localhost:8080/solr/univeral/update?_=1466592530544&wt=json&commit=true";      string strData = @"<delete><id>2</id></delete>";      byte[] bytes;      bytes = System.Text.Encoding.ASCII.GetBytes(strData);      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);      request.Method = "POST";      request.Accept = "*/*";      request.ContentLength = bytes.Length;      request.ContentType = "text/";      Stream requestStream = request.GetRequestStream();      requestStream.Write(bytes, 0, bytes.Length);      requestStream.Close();      HttpWebResponse response = (HttpWebResponse)request.GetResponse();      if (response.StatusCode == HttpStatusCode.OK)      {        Stream responseStream = response.GetResponseStream();        string strJson = new StreamReader(responseStream).ReadToEnd();        Console.WriteLine(strJson);      }    }

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SolrNet实现

      SolrNet最大的优势就是一直在更新,用户众多,并且在github上提供源代码(https://github.com/mausch/SolrNet)和说明文档(https://github.com/mausch/SolrNet/tree/master/Documentation)。

      使用前先创建对应的model,字段和schema.

   

      

public class Book1{    [SolrUniqueKey("id")]    public int Id { get; set; }    [SolrField("title")]    public string Title { get; set; }    [SolrField("author")]    public string Author { get; set; }     }

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       主程序调用前先初始化:Startup.Init<Book1>("http://localhost:8080/solr/univeral/");  OK, 可以实现增删改查了。 

private static void Delete()    {      ISolrOperations<Book1> solr = ServiceLocator.Current.GetInstance<ISolrOperations<Book1>>();      Book1 b=new Book1();      b.Id =2;      solr.Delete(b);      solr.Commit();    }    private static void Index()    {      ISolrOperations<Book1> solr = ServiceLocator.Current.GetInstance<ISolrOperations<Book1>>();      Book1 b = new Book1();      b.Id = 2;      b.Title = "平凡的世界";      b.Author = "路遥";      solr.Add(b);      Book1 b1 = new Book1();      b1.Id = 3;      b1.Title = "围城";      b1.Author = "钱钟书";      solr.Add(b1);      Book1 b2 = new Book1();      b2.Id = 4;      b2.Title = "我要去打魔兽啊";      b2.Author = "张剑";      solr.Add(b2);      Book1 b3 = new Book1();      b3.Id = 5;      b3.Title = "魔兽世界";      b3.Author = "张三";      solr.Add(b3);      solr.Commit();    }    private static void Query()    {      ISolrOperations<Book1> solr = ServiceLocator.Current.GetInstance<ISolrOperations<Book1>>();      SolrQueryResults<Book1> solrResults = solr.Query(new SolrQuery("title:魔兽"));      foreach (var solrQueryResult in solrResults)      {        Console.WriteLine("Id:" + solrQueryResult.Id+",Name:"+solrQueryResult.Title+",Author:"+solrQueryResult.Author);      }      Console.ReadLine();    }

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     SolrNet提供了SolrQuery的多个版本有兴趣的话可以看看它的源码,包括容器如何初始化,容器内部如何使用SolrConnection。也是一个不错的框架,值得推荐。

 

是否索引(indexed)、是否存储(stored)

      你在配置schema.

  • indexed=true  stored=true 需要用关键查询并需要在查询结果中显示。 如book.title、book.author
  • indexed=false stored=true 不需要用关键字查询,但需要在查询结果中显示。 如book.destinationUrl


  • indexed=true stored=false  需要用关键字查询但不需要在查询结果中显示

 

参考资料

     http://www.cnblogs.com/zhangweizhong/p/5073997.html