org.apache.solr.client.solrj.SolrServerException: Server refused connection at: http://localhost:8080/solr/solrCore666 at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:559) at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:210) at org.apache.solr.client.solrj.impl.HttpSolrServer.request(HttpSolrServer.java:206) at org.apache.solr.client.solrj.request.AbstractUpdateRequest.process(AbstractUpdateRequest.java:124) at org.apache.solr.client.solrj.SolrServer.add(SolrServer.java:68) at org.apache.solr.client.solrj.SolrServer.add(SolrServer.java:54) at org.abcdit.solr.test.ProductDaoTest.createIndex(ProductDaoTest.java:43) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70) Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:117) at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:178) at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:304) at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610) at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445) at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:863) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:106) at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:57) at org.apache.solr.client.solrj.impl.HttpSolrServer.executeMethod(HttpSolrServer.java:448)yi
POJO文件：
1 package org.abcdit.solr.pojo; 2 3 public class Product { 4 5 private Integer pid; //INT(11) NOT NULL AUTO_INCREMENT COMMENT '商品编号', 6 private String name; //VARCHAR(255) NULL DEFAULT NULL COMMENT '商品名称', 7 private String catalogName; //VARCHAR(50) NULL DEFAULT NULL COMMENT '商品分类名称', 8 private Double price; //DOUBLE NULL DEFAULT NULL COMMENT '价格', 9 private String description; //LONGTEXT NULL COMMENT '商品描述', 10 private String picture; //VARCHAR(255) NULL DEFAULT NULL COMMENT '图片名称', 11 12 public Integer getPid() { 13 return pid; 14 } 15 16 public void setPid(Integer pid) { 17 this.pid = pid; 18 } 19 20 public String getName() { 21 return name; 22 } 23 24 public void setName(String name) { 25 this.name = name; 26 } 27 28 public String getCatalogName() { 29 return catalogName; 30 } 31 32 public void setCatalogName(String catalogName) { 33 this.catalogName = catalogName; 34 } 35 36 public Double getPrice() { 37 return price; 38 } 39 40 public void setPrice(Double price) { 41 this.price = price; 42 } 43 44 public String getDescription() { 45 return description; 46 } 47 48 public void setDescription(String description) { 49 this.description = description; 50 } 51 52 public String getPicture() { 53 return picture; 54 } 55 56 public void setPicture(String picture) { 57 this.picture = picture; 58 } 59 60 public Product(Integer pid, String name, String catalogName, Double price, String description, String picture) { 61 this.pid = pid; 62 this.name = name; 63 this.catalogName = catalogName; 64 this.price = price; 65 this.description = description; 66 this.picture = picture; 67 } 68 69 public Product() { 70 super(); 71 } 72 73 @Override 74 public String toString() { 75 return "Product{" + 76 "pid=" + pid + 77 ", name='" + name + '\'' + 78 ", catalogName='" + catalogName + '\'' + 79 ", price=" + price + 80 ", description='" + description + '\'' + 81 ", picture='" + picture + '\'' + 82 '}'; 83 } 84 }
DAO层文件：
1 package org.abcdit.solr.dao; 2 3 import org.abcdit.solr.pojo.Product; 4 5 import java.sql.*; 6 import java.util.ArrayList; 7 import java.util.List; 8 9 import org.apache.solr.common.SolrInputDocument; 10 11 public class ProductDao { 12 13 private Connection connection; 14 private PreparedStatement pst; 15 private ResultSet rs; 16 17 public List<Product> findAll(){ 18 19 List<Product> products = new ArrayList<>(); 20 21 try { 22 //1.加载数据驱动 23 Class.forName("com.mysql.cj.jdbc.Driver"); 24 //2.获取connection连接 25 connection = DriverManager.getConnection( 26 "jdbc:mysql://localhost:3306/solr?characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true", 27 "root", 28 "myroot" 29 ); 30 //3.执行PreparedStatement，预编译 31 pst = connection.prepareStatement("SELECT pid, name, catalog_name, price, description, picture FROM products"); 32 //4.执行SQL搜索 33 rs = pst.executeQuery(); 34 35 Product prc = null; 36 while (rs.next()){ 37 prc = new Product(); 38 39 prc.setPid(rs.getInt("pid")); 40 prc.setName(rs.getString("name")); 41 prc.setPrice(rs.getDouble("price")); 42 prc.setPicture(rs.getString("picture")); 43 prc.setCatalogName(rs.getString("catalog_name")); 44 prc.setDescription(rs.getString("description")); 45 46 products.add(prc); 47 } 48 49 } catch (Exception e) { 50 e.printStackTrace(); 51 } finally { 52 if (rs != null) { 53 try { 54 rs.close(); 55 } catch (SQLException e) { 56 e.printStackTrace(); 57 } 58 } 59 if (pst != null){ 60 try { 61 pst.close(); 62 } catch (SQLException e) { 63 e.printStackTrace(); 64 } 65 } 66 if (connection != null){ 67 try { 68 connection.close(); 69 } catch (SQLException e) { 70 e.printStackTrace(); 71 } 72 } 73 74 } 75 76 return products; 77 } 78 79 80 public List<SolrInputDocument> getDocuments(List<Product> products) { 81 82 List<SolrInputDocument> docs = new ArrayList<>(); 83 SolrInputDocument doc = null; 84 85 for (Product product : products) { 86 87 doc = new SolrInputDocument(); 88 doc.addField("id", product.getPid()); //编号 89 doc.addField("productName", product.getName()); //名称 90 doc.addField("productCatalogName", product.getCatalogName());//类别 91 doc.addField("productPrice", product.getPrice()); //价格 92 doc.addField("productPicture", product.getPicture());//图片 93 doc.addField("productDescription", product.getDescription());//描述 94 95 docs.add(doc); 96 97 } 98 99 return docs; 100 101 } 102 103 104 105 }
一、查看是否修改schema.xml，修改配置如下：
<!--product--> <field name="id" type="string" indexed="true" stored="true" required="true" multiValued="false" /> <field name="productName" type="text_general" indexed="true" stored="true"/> <field name="productCatalogName" type="string" indexed="true" stored="true" /> <field name="productPrice" type="double" indexed="true" stored="true"/> <field name="productDescription" type="text_general" indexed="true" stored="false" /> <field name="productPicture" type="string" indexed="false" stored="true" />
1.我们发现，索引库设置的字段名和数据库的字段名不相同，为什么呢？
在实际开发中，我们会保持索引库的字段和数据的字段一致的。本示例之所以配置不一样，是为了让我们知道，索引的字段不等同数据库的字段
连接mysql8具体配置：
查看我之前文章的链接 ： 1.mybatis连接MySQL8数据库 2.mybatis连接MySQL8.0出现的问题
创建测试类：
1 @Test 2 public void createIndex(){ 3 // 1、 创建HttpSolrServer对象，通过它和Solr服务器建立连接。 4 // 参数：solr服务器的访问地址 5 HttpSolrServer server = new HttpSolrServer("http://localhost:8080/solr/solrCore0719"); 6 // 2、 通过HttpSolrServer对象将SolrInputDocument添加到索引库。 7 ProductDao dao = new ProductDao(); 8 try { 9 server.add(dao.getDocuments(dao.getAllProducts())); 10 // 3、 提交。 11 server.commit(); 12 System.out.println("创建索引库成功!!!"); 13 14 } catch (SolrServerException e) { 15 e.printStackTrace(); 16 } catch (IOException e) { 17 e.printStackTrace(); 18 } 19 }