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", "xxx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", "xxx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());
}
}
}