Elasticsearch7使用jdbc连接-向日葵屋

Elasticsearch7.0.1 使用jdbc连接

项目中添加maven依赖

<repositories>  
<repository>  
<id>elastic.co</id>  
<url>https://artifacts.elastic.co/maven</url>  
</repository>  
</repositories>  
<dependency>  
  <groupId>org.elasticsearch.plugin</groupId>  
  <artifactId>x-pack-sql-jdbc</artifactId>  
  <version>7.0.1</version>  
</dependency>

使用测试代码连接

package com.hts;  
import java.sql.Connection;  
import java.sql.DriverManager;  
import java.sql.ResultSet;  
import java.sql.Statement;  
import java.util.Properties;  
public class ESJdbcTest {  
static String driver = "org.elasticsearch.xpack.sql.jdbc.jdbc.JdbcDriver";  
static String elasticsearchAddress = "192.168.79.128:9200";  
public static Properties connectionProperties(){  
Properties properties = new Properties();  
        //如果集群设置了密码
        //properties.put("user", "test_admin");  
        //properties.put("password", "x-pack-test-password");  
return properties;  
}  
public static void main(String[] args) {  
String address = "jdbc:es://http://" + elasticsearchAddress;  
Properties connectionProperties = connectionProperties();  
try {
Connection connection = DriverManager.getConnection(address, connectionProperties);  
Statement statement = connection.createStatement();  
ResultSet results = statement.executeQuery(
"SELECT firstname, account_number FROM bank ORDER BY account_number DESC LIMIT 5");  
while(results.next()){  
System.out.println(results.getString("firstname"));  
}  
}catch (Exception e){  
e.printStackTrace();  
}  
}  
}

异常：发现Exception in thread “main” java.sql.SQLInvalidAuthorizationSpecException: current license is non-compliant for [jdbc] 的错误需要破解xpth，更新白金许可；

在/elasticsearch-7.0.1/modules/x-pack-core目录下找到x-pack-core-7.0.1.jar复制一份出来
新建两个java文件分别命名为LicenseVerifier.java和XPackBuild.java，将下面代码黏贴

①：LicenseVerifier.java
package org.elasticsearch.license;
import java.nio.;
import org.elasticsearch.common.bytes.;
import java.util.;
import java.security.;
import org.elasticsearch.common.xcontent.;
import org.apache.lucene.util.;
import org.elasticsearch.core.internal.io.;
import java.io.;
public class LicenseVerifier{
public static boolean verifyLicense(final License license, final byte[] encryptedPublicKeyData) {
return true;
}
public static boolean verifyLicense(final License license) {
return true;
}
}

②：XPackBuild.java
package org.elasticsearch.xpack.core;
import org.elasticsearch.common.io.;
import java.net.;
import org.elasticsearch.common.;
import java.nio.file.;
import java.io.;
import java.util.jar.;
public class XPackBuild{
public static final XPackBuild CURRENT;
private String shortHash;
private String date;
@SuppressForbidden(reason = “looks up path of xpack.jar directly”)
static Path getElasticsearchCodebase() {
final URL url = XPackBuild.class.getProtectionDomain().getCodeSource().getLocation();
try {
return PathUtils.get(url.toURI());
}
catch (URISyntaxException bogus) {
throw new RuntimeException(bogus);
}
}
XPackBuild(final String shortHash, final String date) {
this.shortHash = shortHash;
this.date = date;
}
public String shortHash() {
return this.shortHash;
}
public String date() {
return this.date;
}
static {
final Path path = getElasticsearchCodebase();
String shortHash = null;
String date = null;
Label_0157: {
shortHash = “Unknown”;
date = “Unknown”;
}
CURRENT = new XPackBuild(shortHash, date);
}
}
使用javac 编译这两个java文件，需要引入import的依赖，使用-cp参数（对应的jar包在elasticsearch安装包中都有）

javac -cp “F:\es\x-pack-core-7.0.1.jar;F:\es\lucene-core-8.0.0.jar;F:\es\elasticsearch-7.0.1.jar;F:\es\elasticsearch-core-7.0.1.jar” F:\es\LicenseVerifier.java
javac -cp “F:\es\x-pack-core-7.0.1.jar;F:\es\lucene-core-8.0.0.jar;F:\es\elasticsearch-7.0.1.jar;F:\es\elasticsearch-core-7.0.1.jar” F:\es\XPackBuild.java
将编译生成的LicenseVerifier.class覆盖复制出来的x-pack-core-7.0.1.jar中目录org/elasticsearch/license下的LicenseVerifier.class，将生成的XPackBuild.class覆盖org/elasticsearch/xpack/core目录下的XPackBuild.class
将覆盖成功后的x-pack-core-7.0.1.jar复制回/elasticsearch-7.0.1/modules/x-pack-core目录下覆盖原来的
获取 license 证书
①：https://license.elastic.co/registration填些用户名，邮箱（重要，获取下载链接），Country选择China，其他信息随意填写，点击Send
②打开邮箱获取的地址，将下载后的文件改名为license.json

③修改文件中的内容，将两个属性改为以下
将 “type”:“basic” 替换为 “type”:“platinum” # 基础班变更为铂金版
将 “expiry_date_in_millis”:1561420799999替换为
④使用curl替换 license(license.json指的是刚刚下载修改属性后的证书，要开启elasticsearch服务)
curl -XPUT ‘http://127.0.0.1:9200/\_xpack/license?acknowledge=true’ -d @license.json

⑤可能遇到Cannot install a [PLATINUM] license unless TLS is configured or security is disabled的错误，解决方法在elasticsearch.yml新增：
xpack.security.enabled: false
⑥上传后查看证书时间http://127.0.0.1:9200/\_license