一.下载elasticsearch-analysis-ik源码下载

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二.解压修改源码文件

我这里使用idea开发

修改maven依赖es版本号

<elasticsearch.version>7.1.0</elasticsearch.version>

引入oracle驱动

        <!-- oracle驱动包 -->
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc7</artifactId>
            <version>12.1.0.2</version>
        </dependency>

创建循环线程类

package org.wltea.analyzer.dic;

import org.apache.logging.log4j.Logger;
import org.wltea.analyzer.help.ESPluginLoggerFactory;


/**
 * @Description: HotDictReloadThread 获取词典单子实例，并执行它的reLoadMainDict方法
 * @Author: HuGang  1042258937@qq.com
 * @CreateDate: 2022/7/19 10:06
 */
public class HotDictReloadThread {

    private static final Logger log = ESPluginLoggerFactory.getLogger(HotDictReloadThread.class.getName());
    public void initial(){
        while (true) {
            log.info("正在调用HotDictReloadThread...");
            Dictionary.getSingleton().reLoadMainDict();
        }
    }
}

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在项目中找到Dictionary类修改initial方法

                    //启动自定义线程
                    pool.execute(() -> new HotDictReloadThread().initial());

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准备数据库文件

-- Create table
create table T_DSJFX_IK_LEXICON
(
  TEXT             VARCHAR2(15) not null,
  TYPE             INTEGER default 0,
  STATUS           INTEGER default 0,
  SEARCH_COUNT     INTEGER default 0,
  LAST_SEARCH_TIME DATE default sysdate
)
-- Add comments to the table 
comment on table T_DSJFX_IK_LEXICON
  is 'ES ik分词器自定义词条';
-- Add comments to the columns 
comment on column T_DSJFX_IK_LEXICON.TEXT
  is '词条';
comment on column T_DSJFX_IK_LEXICON.TYPE
  is '0扩展词库 1停用词库';
comment on column T_DSJFX_IK_LEXICON.STATUS
  is '词条状态 0正常 1暂停使用';
comment on column T_DSJFX_IK_LEXICON.SEARCH_COUNT
  is '搜索次数';
comment on column T_DSJFX_IK_LEXICON.LAST_SEARCH_TIME
  is '最后搜索时间';
-- Create/Recreate primary, unique and foreign key constraints 
alter table T_DSJFX_IK_LEXICON
  add constraint PK_LEXICON_TEXT primary key (TEXT)
  using index 
  tablespace TS_JCJMR_DATA
  pctfree 10
  initrans 2
  maxtrans 255
  storage
  (
    initial 64K
    next 1M
    minextents 1
    maxextents unlimited
  );

然后我们在项目的根路径的config目录下新建配置文件jdbc-reload.properties，内容如下

#  公司地址
# 数据库地址
jdbc.url=jdbc:oracle:thin:@127.0.0.1:1521/hnkcdb
# 数据库用户名
jdbc.user=user
# 数据库密码
jdbc.password=password
# 数据库查询扩展词库sql语句
jdbc.reload.sql=select text as word from t_dsjfx_ik_lexicon t where t.type = '0' and t.status = '0'
# 数据库查询停用词sql语句
jdbc.reload.stopword.sql=select text as word from t_dsjfx_ik_lexicon t where t.type = '1' and t.status = '0'
# 数据库查询间隔时间 每隔60秒请求一次
jdbc.reload.interval=60

在类中创建获取数据库连接类

    private Connection getConn(){
        Connection conn = null;
        //加载配置文件
        Path file = PathUtils.get(getDictRoot(), "jdbc-reload.properties");
        try {
            props.load(new FileInputStream(file.toFile()));
            logger.info("[==========]jdbc-reload.properties");
            for(Object key : props.keySet()) {
                logger.info("[==========]" + key + "=" + props.getProperty(String.valueOf(key)));
            }
            Class.forName("oracle.jdbc.driver.OracleDriver");//反射
            //获取连接对象 驱动成功后进行连接
            conn= DriverManager.getConnection(props.getProperty("jdbc.url"), props.getProperty("jdbc.user"), props.getProperty("jdbc.password"));
        }catch (SQLException throwables) {
            throwables.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;
    }

找到Dictionary类的reLoadMainDict方法，可以看到在方面里面，有2个方法tmpDict.loadMainDict()和tmpDict.loadStopWordDict()，分别维护的是扩展词库和停用词库，一块先看一下对扩展词库的维护；

在方法tmpDict.loadMainDict()中，我们在最后一行加载远程自定义词库后面新增一个方法this.loadMySQLExtDict()，用于加载oracle词库，在加载oracle词库之前，我们需先准备一下oracle相关的配置以及sql语句；在数据库中新建一张表，用户维护扩展词和停用词，表结构如下

从oracle中加载动态词库

    private void loadMyDbExtDict(){
        Connection conn=null;
        Statement st=null;
        ResultSet rs=null;
        try {
            //获取连接对象 驱动成功后进行连接
            conn = getConn();
            //2、创建statement类对象，用来执行SQL语句
            st=conn.createStatement();
            //3、创建sql查询语句
            String sql=props.getProperty("jdbc.reload.sql");
            //4、执行sql语句并且换回一个查询的结果集
            rs=st.executeQuery(sql);
            while(rs.next()) {  //循环遍历结果集
                String theWord = rs.getString("word");
                logger.info("[==========]正在加载自定义IK扩展词库词条: " + theWord);
                _MainDict.fillSegment(theWord.trim().toCharArray());
            }
            Thread.sleep(Integer.valueOf(String.valueOf(props.get("jdbc.reload.interval"))) * 1000);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if(rs != null) {
                try {
                    rs.close();
                } catch (SQLException e) {
                    logger.error("error", e);
                }
            }
            if(st != null) {
                try {
                    st.close();
                } catch (SQLException e) {
                    logger.error("error", e);
                }
            }
            if(conn != null) {
                try {
                    conn.close();
                } catch (SQLException e) {
                    logger.error("error", e);
                }
            }
        }
    }

this.loadMySQLExtDict();

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停用词类似 依葫芦画瓢

oracl依赖包直接添加（不添加的话 也可自行拷贝jar相应目录）

        <dependencySet>
            <outputDirectory/>
            <useProjectArtifact>true</useProjectArtifact>
            <useTransitiveFiltering>true</useTransitiveFiltering>
            <includes>
                <include>com.oracle:ojdbc7</include>
            </includes>
        </dependencySet>

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安装IK分词器插件

完成上述步骤后，拿到elasticsearch-analysis-ik-7.8.0.zip插件，我们将其放在ES安装目录下的plugins目录下，新建一个ik文件夹，将其解压到ik文件夹下

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三.常见问题

异常1

java.sql.SQLException: Column 'word' not found.
此异常是因为编写sql时，查询的数据库字段需要起别名为 word，修改一下sql即可解决这个问题；

异常2 困恼了我一个星期，找了各种答案都做不到，重点要记笔记的

java.security.AccessControlException: access denied ("java.lang.management.ManagementPermission" "control")

[2022-07-22T13:42:21,186][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-1] fatal error in thread [elasticsearch[node-1][clusterApplierService#updateTask][T#1]], exiting
java.lang.ExceptionInInitializerError: null
    at oracle.jdbc.driver.BlockSource$ThreadedCachingBlockSource.<clinit>(BlockSource.java:402) ~[?:?]
    at oracle.jdbc.driver.BlockSource.createBlockSource(BlockSource.java:80) ~[?:?]
    at oracle.jdbc.driver.BlockSource.createBlockSource(BlockSource.java:70) ~[?:?]
    at oracle.jdbc.driver.PhysicalConnection.setBlockSource(PhysicalConnection.java:593) ~[?:?]
    at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:631) ~[?:?]
    at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:398) ~[?:?]
    at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:31) ~[?:?]
    at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:566) ~[?:?]
    at java.sql.DriverManager.getConnection(DriverManager.java:677) ~[java.sql:?]
    at java.sql.DriverManager.getConnection(DriverManager.java:228) ~[java.sql:?]
    at org.wltea.analyzer.dic.Dictionary.getConn(Dictionary.java:686) ~[?:?]
    at org.wltea.analyzer.dic.Dictionary.loadMyDbExtDict(Dictionary.java:589) ~[?:?]
    at org.wltea.analyzer.dic.Dictionary.loadMainDict(Dictionary.java:398) ~[?:?]
    at org.wltea.analyzer.dic.Dictionary.initial(Dictionary.java:151) ~[?:?]
    at org.wltea.analyzer.cfg.Configuration.<init>(Configuration.java:40) ~[?:?]
    at org.elasticsearch.index.analysis.IkTokenizerFactory.<init>(IkTokenizerFactory.java:15) ~[?:?]
    at org.elasticsearch.index.analysis.IkTokenizerFactory.getIkSmartTokenizerFactory(IkTokenizerFactory.java:23) ~[?:?]
    at org.elasticsearch.index.analysis.AnalysisRegistry.buildMapping(AnalysisRegistry.java:338) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.index.analysis.AnalysisRegistry.buildTokenizerFactories(AnalysisRegistry.java:174) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.index.analysis.AnalysisRegistry.build(AnalysisRegistry.java:159) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.index.IndexService.<init>(IndexService.java:165) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.index.IndexModule.newIndexService(IndexModule.java:398) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.indices.IndicesService.createIndexService(IndicesService.java:544) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.indices.IndicesService.createIndex(IndicesService.java:493) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.indices.IndicesService.createIndex(IndicesService.java:161) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.indices.cluster.IndicesClusterStateService.createIndices(IndicesClusterStateService.java:498) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.indices.cluster.IndicesClusterStateService.applyClusterState(IndicesClusterStateService.java:268) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.cluster.service.ClusterApplierService.lambda$callClusterStateAppliers$5(ClusterApplierService.java:478) ~[elasticsearch-7.1.0.jar:7.1.0]
    at java.lang.Iterable.forEach(Iterable.java:75) ~[?:?]
    at org.elasticsearch.cluster.service.ClusterApplierService.callClusterStateAppliers(ClusterApplierService.java:476) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.cluster.service.ClusterApplierService.applyChanges(ClusterApplierService.java:459) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.cluster.service.ClusterApplierService.runTask(ClusterApplierService.java:413) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.cluster.service.ClusterApplierService$UpdateTask.run(ClusterApplierService.java:164) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:681) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:252) ~[elasticsearch-7.1.0.jar:7.1.0]
    at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:215) ~[elasticsearch-7.1.0.jar:7.1.0]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
    at java.lang.Thread.run(Thread.java:835) [?:?]
Caused by: java.security.AccessControlException: access denied ("java.lang.management.ManagementPermission" "control")
    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:472) ~[?:?]
    at java.security.AccessController.checkPermission(AccessController.java:1042) ~[?:?]
    at java.lang.SecurityManager.checkPermission(SecurityManager.java:408) ~[?:?]
    at sun.management.Util.checkAccess(Util.java:77) ~[?:?]
    at sun.management.Util.checkControlAccess(Util.java:85) ~[?:?]
    at sun.management.MemoryPoolImpl.setCollectionUsageThreshold(MemoryPoolImpl.java:213) ~[?:?]
    at oracle.jdbc.driver.BlockSource$ThreadedCachingBlockSource$BlockReleaserListener$1.run(BlockSource.java:376) ~[?:?]
    at java.security.AccessController.doPrivileged(AccessController.java:310) ~[?:?]
    at oracle.jdbc.driver.BlockSource$ThreadedCachingBlockSource$BlockReleaserListener.<init>(BlockSource.java:374) ~[?:?]
    at oracle.jdbc.driver.BlockSource$ThreadedCachingBlockSource$BlockReleaserListener.<clinit>(BlockSource.java:348) ~[?:?]
    ... 39 more

解决方法：在plugin-security.policy文件中添加

permission java.lang.management.ManagementPermission "control";

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异常3：AccessControlException: access denied ("java.net.SocketPermission" "127.0.0.1:3306" "connect,resolve")

在D:\tool\ELK\elasticsearch-7.1.0\jdk\conf\securityjava.polic文件中添加

permission java.net.SocketPermission "*", "connect,resolve";
#有相应报错的就添加
    permission java.lang.RuntimePermission "accessClassInPackage.sun.security.krb5";
    permission java.lang.RuntimePermission "accessDeclaredMembers";
    permission javax.management.MBeanServerPermission "createMBeanServer";

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四、测试

GET _analyze
{
  "analyzer": "ik_max_word",
  "text": "微信"
}

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无法分词，在数据中添加“微信”等60秒

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成功！！！

mysql查看Elasticsearch7.8.0集成IK分词器改源码实现MySql5.7.2实现动态词库实时更新