Solr JAVA客户端SolrJ 4.9使用示例教程

简介

        SolrJ是操作Solr的JAVA客户端，它提供了增加、修改、删除、查询Solr索引的JAVA接口。SolrJ针对Solr提供了Rest 的HTTP接口进行了封装，SolrJ底层是通过使用httpClient中的方法来完成Solr的操作。

SolrJ/Solr 跨版本兼容性

    SolrJ通常向后保持兼容性，可以使用新版本的SolrJ访问较旧的Solr,反之亦然。建议使用同Solr server同版本的SolrJ, 

    详见http://wiki.apache.org/solr/Solrj 中关于兼容性的描述。

示例代码

•    采用SolrInputDocument对象增加、删除索引

• import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  import org.apache.solr.client.solrj.impl.HttpSolrServer;
  import org.apache.solr.common.SolrInputDocument;
  
  public class AddDocsDemo {
  	public static final String SOLR_URL = "http://172.168.63.233:8983/solr";
  
  	public static void main(String[] args) {
  		//通过浏览器查看结果
  		//http://172.168.63.233:8983/solr/collection1/select?q=name%3A%E6%94%B9%E9%9D%A9&wt=json&indent=true
  		//AddDocs();
  		delDocs();
  	}
  
  	public static void AddDocs() {
  		String[] words = { "中央全面深化改革领导小组", "第四次会议", "审议了国企薪酬制度改革", "考试招生制度改革",
  				"传统媒体与新媒体融合等", "相关内容文件", "习近平强调要", "逐步规范国有企业收入分配秩序",
  				"实现薪酬水平适当", "结构合理、管理规范、监督有效", "对不合理的偏高", "过高收入进行调整",
  				"深化考试招生制度改革", "总的目标是形成分类考试", "综合评价", "多元录取的考试招生模式", "健全促进公平",
  				"科学选才", "监督有力的体制机制", "着力打造一批形态多样", "手段先进", "具有竞争力的新型主流媒体",
  				"建成几家拥有强大实力和传播力", "公信力", "影响力的新型媒体集团" };
  		long start = System.currentTimeMillis();
  		Collection<SolrInputDocument> docs = new ArrayList<SolrInputDocument>();
  		for (int i = 1; i < 300; i++) {
  			SolrInputDocument doc1 = new SolrInputDocument();
  			doc1.addField("id", "id" + i, 1.0f);
  			doc1.addField("name", words[i % 21], 1.0f);
  			doc1.addField("price", 10 * i);
  			docs.add(doc1);
  		}
  		try {
  			HttpSolrServer server = new HttpSolrServer(SOLR_URL);
  			// 可以通过三种方式增加docs,其中server.add(docs.iterator())效率最高
  			// 增加后通过执行commit函数commit (936ms)
  //			 server.add(docs);
  //			 server.commit();
  
  			// 增加doc后立即commit (946ms)
  //			 UpdateRequest req = new UpdateRequest();
  //			 req.setAction(ACTION.COMMIT, false, false);
  //			 req.add(docs);
  //			 UpdateResponse rsp = req.process(server);
  
  			// the most optimal way of updating all your docs 
  			// in one http request(432ms)
  			server.add(docs.iterator());
  		} catch (Exception e) {
  			System.out.println(e);
  		}
  		System.out.println("time elapsed(ms):"
  				+ (System.currentTimeMillis() - start));
  	}
  
  	public static void delDocs() {
  		long start = System.currentTimeMillis();
  		try {
  			HttpSolrServer server = new HttpSolrServer(SOLR_URL);
  			List<String> ids = new ArrayList<String>();
  			for (int i = 1; i < 300; i++) {
  				ids.add("id" + i);
  			}
  			server.deleteById(ids);
  			server.commit();
  		} catch (Exception e) {
  			System.out.println(e);
  		}
  		System.out.println("time elapsed(ms):"
  				+ (System.currentTimeMillis() - start));
  	}
  }

•     采用POJOs增加、删除索引

• import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.List;
  import java.util.Random;
  
  import org.apache.solr.client.solrj.beans.DocumentObjectBinder;
  import org.apache.solr.client.solrj.impl.BinaryRequestWriter;
  import org.apache.solr.client.solrj.impl.HttpSolrServer;
  import org.apache.solr.common.SolrInputDocument;
  
  public class AddBeansDemo {
  	public static final String SOLR_URL = "http://172.168.63.233:8983/solr";
  
  	public static void main(String[] args) {
  		// 通过浏览器查看结果
  		// 要保证bean中各属性的名称在conf/schema.xml中存在，如果查询，要保存被索引
  		// http://172.168.63.233:8983/solr/collection1/select?q=description%3A%E6%94%B9%E9%9D%A9&wt=json&indent=true
  //		delBeans();
  		AddBeans();
  	}
  
  	public static Random rand = new Random(47);
  	public static String[] authors = { "张三", "李四", "王五", "赵六", "张飞", "刘备",
  			"关云长" };
  	public static String[] links = {
  			"http://repository.sonatype.org/content/sites/forge-sites/m2e/",
  			"http://news.ifeng.com/a/20140818/41626965_0.shtml",
  			"http://news.ifeng.com/a/20140819/41631363_0.shtml?wratingModule_1_9_1",
  			"http://news.ifeng.com/topic/19382/",
  			"http://news.ifeng.com/topic/19644/" };
  
  	public static String genAuthors() {
  		List<String> list = Arrays.asList(authors).subList(0, rand.nextInt(7));
  		String str = "";
  		for (String tmp : list) {
  			str += " " + tmp;
  		}
  		return str;
  	}
  
  	public static List<String> genLinks() {
  		return Arrays.asList(links).subList(0, rand.nextInt(5));
  	}
  
  	public static void AddBeans() {
  		String[] words = { "中央全面深化改革领导小组", "第四次会议", "审议了国企薪酬制度改革", "考试招生制度改革",
  				"传统媒体与新媒体融合等", "相关内容文件", "习近平强调要", "逐步规范国有企业收入分配秩序",
  				"实现薪酬水平适当", "结构合理、管理规范、监督有效", "对不合理的偏高", "过高收入进行调整",
  				"深化考试招生制度改革", "总的目标是形成分类考试", "综合评价", "多元录取的考试招生模式", "健全促进公平",
  				"科学选才", "监督有力的体制机制", "着力打造一批形态多样", "手段先进", "具有竞争力的新型主流媒体",
  				"建成几家拥有强大实力和传播力", "公信力", "影响力的新型媒体集团" };
  
  		long start = System.currentTimeMillis();
  		Collection<NewsBean> docs = new ArrayList<NewsBean>();
  //		DocumentObjectBinder binder = new DocumentObjectBinder();
  		for (int i = 1; i < 300; i++) {
  			NewsBean news = new NewsBean();
  			news.setId("id" + i);
  			news.setName("news" + i);
  			news.setAuthor(genAuthors());
  			news.setDescription(words[i % 21]);
  			news.setRelatedLinks(genLinks());
  //			SolrInputDocument doc1 = binder.toSolrInputDocument(news);
  			docs.add(news);
  		}
  		try {
  			HttpSolrServer server = new HttpSolrServer(SOLR_URL);
  			server.setRequestWriter(new BinaryRequestWriter());
  			// 可以通过二种方式增加docs,其中server.add(docs.iterator())效率最高
  			// 增加后通过执行commit函数commit (981ms)
  			// server.addBeans(docs);
  			// server.commit();
  
  			// the most optimal way of updating all your docs
  			// in one http request(481ms)
  			server.addBeans(docs.iterator());
  			server.optimize(); //time elasped 1176ms
  		} catch (Exception e) {
  			System.out.println(e);
  		}
  		System.out.println("time elapsed(ms):"
  				+ (System.currentTimeMillis() - start));
  	}
  
  	public static void delBeans() {
  		long start = System.currentTimeMillis();
  		try {
  			HttpSolrServer server = new HttpSolrServer(SOLR_URL);
  			List<String> ids = new ArrayList<String>();
  			for (int i = 1; i < 300; i++) {
  				ids.add("id" + i);
  			}
  			server.deleteById(ids);
  			server.commit();
  		} catch (Exception e) {
  			System.out.println(e);
  		}
  		System.out.println("time elapsed(ms):"
  				+ (System.currentTimeMillis() - start));
  	}
  }

  import java.util.List;
  
  import org.apache.solr.client.solrj.beans.Field;
  
  class NewsBean {
  	@Field
  	private String id;
  
  	@Field
  	private String name;
  
  	@Field
  	private String author;
  
  	@Field
  	private String description;
  
  	@Field("links")
  	private List<String> relatedLinks;
  	
  	public NewsBean(){
  		
  	}
  
  	public String getId() {
  		return id;
  	}
  
  	public void setId(String id) {
  		this.id = id;
  	}
  
  	
  	public String getName() {
  		return name;
  	}
  
  	public void setName(String name) {
  		this.name = name;
  	}
  
  	public String getAuthor() {
  		return author;
  	}
  
  	public void setAuthor(String author) {
  		this.author = author;
  	}
  
  	public String getDescription() {
  		return description;
  	}
  
  	public void setDescription(String description) {
  		this.description = description;
  	}
  
  	public List<String> getRelatedLinks() {
  		return relatedLinks;
  	}
  
  	public void setRelatedLinks(List<String> relatedLinks) {
  		this.relatedLinks = relatedLinks;
  	}
  }

•     普通方式处理查询结果

• import java.io.IOException;
  
  import org.apache.solr.client.solrj.SolrQuery;
  import org.apache.solr.client.solrj.SolrQuery.ORDER;
  import org.apache.solr.client.solrj.SolrServerException;
  import org.apache.solr.client.solrj.impl.BinaryRequestWriter;
  import org.apache.solr.client.solrj.impl.HttpSolrServer;
  import org.apache.solr.client.solrj.impl.XMLResponseParser;
  import org.apache.solr.client.solrj.response.QueryResponse;
  import org.apache.solr.common.SolrDocument;
  
  public class QueryDocsDemo {
  //	public static final String SOLR_URL = "http://192.168.230.128:8983/solr";
  	public static final String SOLR_URL = "http://172.168.63.233:8983/solr";
  
  	public static void main(String[] args) throws SolrServerException, IOException {
  		HttpSolrServer server = new HttpSolrServer(SOLR_URL);
  		server.setMaxRetries(1);
  		server.setMaxRetries(1); // defaults to 0. > 1 not recommended.
  		server.setConnectionTimeout(5000); // 5 seconds to establish TCP
  		//正常情况下，以下参数无须设置
  		//使用老版本solrj操作新版本的solr时，因为两个版本的javabin incompatible,所以需要设置Parser
  		server.setParser(new XMLResponseParser());
  		server.setSoTimeout(1000); // socket read timeout
  		server.setDefaultMaxConnectionsPerHost(100);
  		server.setMaxTotalConnections(100);
  		server.setFollowRedirects(false); // defaults to false
  		// allowCompression defaults to false.
  		// Server side must support gzip or deflate for this to have any effect.
  		server.setAllowCompression(true);
  
  		//使用ModifiableSolrParams传递参数
  //		ModifiableSolrParams params = new ModifiableSolrParams();
  //		// 192.168.230.128:8983/solr/select?q=video&fl=id,name,price&sort=price asc&start=0&rows=2&wt=json
  //		// 设置参数，实现上面URL中的参数配置
  //		// 查询关键词
  //		params.set("q", "video");
  //		// 返回信息
  //		params.set("fl", "id,name,price,score");
  //		// 排序
  //		params.set("sort", "price asc");
  //		// 分页,start=0就是从0开始,rows=5当前返回5条记录,第二页就是变化start这个值为5就可以了
  //		params.set("start", 2);
  //		params.set("rows", 2);
  //		// 返回格式
  //		params.set("wt", "javabin");
  //		QueryResponse response = server.query(params);
  
  		//使用SolrQuery传递参数，SolrQuery的封装性更好
  		server.setRequestWriter(new BinaryRequestWriter());
  		SolrQuery query = new SolrQuery();
  		query.setQuery("video");
  		query.setFields("id","name","price","score");
  		query.setSort("price", ORDER.asc);
  		query.setStart(0);
  		query.setRows(2);
  //		query.setRequestHandler("/select");
  		QueryResponse response = server.query( query );
  		
  		
  		
  		// 搜索得到的结果数
  		System.out.println("Find:" + response.getResults().getNumFound());
  		// 输出结果
  		int iRow = 1;
  		for (SolrDocument doc : response.getResults()) {
  			System.out.println("----------" + iRow + "------------");
  			System.out.println("id: " + doc.getFieldValue("id").toString());
  			System.out.println("name: " + doc.getFieldValue("name").toString());
  			System.out.println("price: "
  					+ doc.getFieldValue("price").toString());
  			System.out.println("score: " + doc.getFieldValue("score"));
  			iRow++;
  		}
  	}
  }

•     采用POJOs方式处理查询结果

• import java.io.IOException;
  import java.util.List;
  
  import org.apache.solr.client.solrj.SolrQuery;
  import org.apache.solr.client.solrj.SolrQuery.ORDER;
  import org.apache.solr.client.solrj.SolrServerException;
  import org.apache.solr.client.solrj.beans.DocumentObjectBinder;
  import org.apache.solr.client.solrj.impl.HttpSolrServer;
  import org.apache.solr.client.solrj.response.FacetField;
  import org.apache.solr.client.solrj.response.QueryResponse;
  import org.apache.solr.common.SolrDocument;
  import org.apache.solr.common.SolrDocumentList;
  
  public class QueryBeanDemo {
  	public static final String SOLR_URL = "http://172.168.63.233:8983/solr";
  
  	public static void main(String[] args) throws SolrServerException,
  			IOException {
  		// http://172.168.63.233:8983/solr/collection1/select?q=description%3A%E6%80%BB%E7%9B%AE%E6%A0%87&facet=true&facet.field=author_s
  		HttpSolrServer server = new HttpSolrServer(SOLR_URL);
  		server.setMaxRetries(1);
  		server.setMaxRetries(1); // defaults to 0. > 1 not recommended.
  		server.setConnectionTimeout(5000); // 5 seconds to establish TCP
  		// server.setRequestWriter(new BinaryRequestWriter());
  
  		SolrQuery query = new SolrQuery();
  		query.setQuery("description:改革");
  		query.setStart(0);
  		query.setRows(2);
  		query.setFacet(true);
  		query.addFacetField("author_s");
  
  		QueryResponse response = server.query(query);
  		// 搜索得到的结果数
  		System.out.println("Find:" + response.getResults().getNumFound());
  		// 输出结果
  		int iRow = 1;
  		
  		//response.getBeans存在BUG,将DocumentObjectBinder引用的Field应该为 org.apache.solr.client.solrj.beans.Field
  		SolrDocumentList list = response.getResults();
  		DocumentObjectBinderL binder = new DocumentObjectBinderL();
  		List<NewsBean> beanList=binder.getBeans(NewsBean.class, list);
  		for(NewsBean news:beanList){
  			System.out.println(news.getId());
  		}
  
  		for (SolrDocument doc : response.getResults()) {
  			System.out.println("----------" + iRow + "------------");
  			System.out.println("id: " + doc.getFieldValue("id").toString());
  			System.out.println("name: " + doc.getFieldValue("name").toString());
  			iRow++;
  		}
  		for (FacetField ff : response.getFacetFields()) {
  			System.out.println(ff.getName() + "," + ff.getValueCount() + ","
  					+ ff.getValues());
  		}
  	}
  }

参考

http://wiki.apache.org/solr/Solrj

来源：oschina

链接：https://my.oschina.net/u/1410765/blog/305024