🚧 lucene更新删除索引

src/main/java/com/rymcu/forest/lucene/lucene/ArticleBeanIndex.java

@@ -7,7 +7,10 @@ import org.apache.lucene.document.TextField;
 import org.apache.lucene.index.IndexWriter;
 import org.apache.lucene.index.IndexWriterConfig;
 import org.apache.lucene.index.Term;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.search.TermQuery;
 
+import java.io.IOException;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
 
@@ -19,6 +22,11 @@ import java.util.concurrent.CountDownLatch;
  */
 public class ArticleBeanIndex extends BaseIndex<ArticleLucene> {
 
+  public ArticleBeanIndex(
+          String parentIndexPath,int subIndex) {
+    super(parentIndexPath, subIndex);
+  }
+
   public ArticleBeanIndex(
       IndexWriter writer,
       CountDownLatch countDownLatch1,
@@ -52,4 +60,14 @@ public class ArticleBeanIndex extends BaseIndex<ArticleLucene> {
       writer.updateDocument(new Term("id", t.getIdArticle() + ""), doc);
     }
   }
+
+  public void indexDoc(ArticleLucene t) throws Exception {
+    indexDoc(getWriter(),t);
+  }
+
+  @Override
+  public void deleteDoc( String id) throws IOException {
+    Query query = new TermQuery(new Term("id", id));
+    getWriter().deleteDocuments(query);
+  }
 }

src/main/java/com/rymcu/forest/lucene/lucene/BaseIndex.java

@@ -29,6 +29,18 @@ public abstract class BaseIndex<T> implements Runnable {
   /** 对象列表 */
   private List<T> list;
 
+  public BaseIndex(String parentIndexPath, int subIndex) {
+    this.parentIndexPath = parentIndexPath;
+    this.subIndex = subIndex;
+    try {
+      this.writer = IndexUtil.getIndexWriter(parentIndexPath + "/index" + subIndex, true);
+    } catch (IOException e) {
+      e.printStackTrace();
+    }
+    this.countDownLatch1 = null;
+    this.countDownLatch2 = null;
+  }
+
   public BaseIndex(
       IndexWriter writer,
       CountDownLatch countDownLatch1,
@@ -60,7 +72,7 @@ public abstract class BaseIndex<T> implements Runnable {
     } catch (IOException e) {
       e.printStackTrace();
     }
-    ;
+
     this.subIndex = subIndex;
     this.countDownLatch1 = countDownLatch1;
     this.countDownLatch2 = countDownLatch2;
@@ -107,6 +119,12 @@ public abstract class BaseIndex<T> implements Runnable {
     }
   }
 
+  public abstract void deleteDoc(String id) throws IOException;
+
+  public IndexWriter getWriter() {
+    return writer;
+  }
+
   @Override
   public void run() {
     try {

src/main/java/com/rymcu/forest/lucene/mapper/ArticleLuceneMapper.java

@@ -30,4 +30,14 @@ public interface ArticleLuceneMapper {
    * @return
    */
   List<ArticleDTO> getArticlesByIds(@Param("ids") String[] ids);
+
+
+  /**
+   * 加载文章内容
+   *
+   * @param id 文章id
+   * @return
+   */
+  ArticleLucene getById(@Param("id") String id);
+
 }

src/main/java/com/rymcu/forest/lucene/service/LuceneService.java

@@ -20,6 +20,27 @@ public interface LuceneService {
    */
   void writeArticle(List<ArticleLucene> list);
 
+  /**
+   * 写入单个文章索引
+   *
+   * @param id
+   */
+  void writeArticle(String id) throws Exception;
+
+  /**
+   * 更新单个文章索引
+   *
+   * @param id
+   */
+  void updateArticle(String id) throws Exception;
+
+  /**
+   * 删除单个文章索引
+   *
+   * @param id
+   */
+  void deleteArticle(String id);
+
   /**
    * 关键词搜索
    *

src/main/java/com/rymcu/forest/lucene/service/impl/LuceneServiceImpl.java

@@ -21,13 +21,11 @@ import org.springframework.stereotype.Service;
 
 import javax.annotation.Resource;
 import java.io.BufferedReader;
+import java.io.File;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
@@ -44,7 +42,7 @@ public class LuceneServiceImpl implements LuceneService {
   @Resource private ArticleLuceneMapper luceneMapper;
 
   /** Lucene索引文件路径 */
-  private final String indexPath = System.getProperty("user.dir") + "/lucene/index";
+  private final String indexPath = "lucene/index";
 
   /**
    * 将文章的数据解析为一个个关键字词存储到索引文件中
@@ -66,7 +64,7 @@ public class LuceneServiceImpl implements LuceneService {
         int end = Math.min((i + 1) * perThreadCount, totalCount);
         List<ArticleLucene> subList = list.subList(start, end);
         Runnable runnable =
-            new ArticleBeanIndex("lucene/index", i, countDownLatch1, countDownLatch2, subList);
+            new ArticleBeanIndex(indexPath, i, countDownLatch1, countDownLatch2, subList);
         // 子线程交给线程池管理
         pool.execute(runnable);
       }
@@ -83,6 +81,31 @@ public class LuceneServiceImpl implements LuceneService {
     }
   }
 
+  @Override
+  public void writeArticle(String id) throws Exception {
+    writeArticle(luceneMapper.getById(id), true);
+  }
+
+  @Override
+  public void updateArticle(String id) throws Exception {
+    writeArticle(luceneMapper.getById(id), false);
+  }
+
+  @Override
+  public void deleteArticle(String id) {}
+
+  private void writeArticle(ArticleLucene article, boolean create) throws Exception {
+    if (!create) {
+      int size = Objects.requireNonNull(new File(indexPath).listFiles()).length;
+      while (size-- >= 0) {
+        ArticleBeanIndex index = new ArticleBeanIndex(indexPath, size);
+        index.deleteDoc(article.getIdArticle());
+      }
+    }
+    ArticleBeanIndex index = new ArticleBeanIndex(indexPath, 0x0);
+    index.indexDoc(article);
+  }
+
   /**
    * 关键词搜索
    *

src/main/java/mapper/lucene/ArticleLuceneMapper.xml

@@ -61,4 +61,11 @@
             #{id}
         </foreach>
     </select>
+
+    <select id="getById" resultMap="DTOResultMap">
+        select art.id, art.article_title, content.article_content
+        from forest_article art
+                 left join forest_article_content content on art.id = content.id_article
+        where id = #{id};
+    </select>
 </mapper>