通过Http接口及SolrNet 两种方法基于Solr5.5.1 实现CURD

时间:2024-11-01 19:36:39

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/xml; encoding='utf-8'"; Stream requestStream = request.GetRequestStream();
requestStream.Write(bytes,,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/xml; encoding='utf-8'"; Stream requestStream = request.GetRequestStream();
requestStream.Write(bytes, , 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);
} }

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.xml中的字段对应,并使用属性SolrUniqueKey和SolrField标识主见和普通字段。

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

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 =; solr.Delete(b);
solr.Commit();
} private static void Index()
{
ISolrOperations<Book1> solr = ServiceLocator.Current.GetInstance<ISolrOperations<Book1>>(); Book1 b = new Book1();
b.Id = ;
b.Title = "平凡的世界";
b.Author = "路遥"; solr.Add(b); Book1 b1 = new Book1();
b1.Id = ;
b1.Title = "围城";
b1.Author = "钱钟书"; solr.Add(b1); Book1 b2 = new Book1();
b2.Id = ;
b2.Title = "我要去打魔兽啊";
b2.Author = "张剑"; solr.Add(b2); Book1 b3 = new Book1();
b3.Id = ;
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();
}

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.xml时注意到field的这几个字段了么? 我第一次配置时并没有关注这几个属性,只是觉的有些好奇,都是什么情况下需要设置这几个属性呢?这才专门查了它们几个之间的区别:

  • 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