完善注释，lastUpdate采用long类型，直接时间戳格式；

src/main/java/org/wltea/analyzer/lucene/IKTokenizerFactory.java

@@ -1,7 +1,7 @@
 /*
- * IK 中文分词  版本 7.0
+ * IK 中文分词  版本 7.4
- * IK Analyzer release 7.0
+ * IK Analyzer release 7.4
- * update by 高志成(magese@live.cn)
+ * update by Magese(magese@live.cn)
  */
 package org.wltea.analyzer.lucene;
 
@@ -19,14 +19,12 @@ import java.util.*;
 /**
  * @author <a href="magese@live.cn">Magese</a>
  */
-@SuppressWarnings("unchecked")
 public class IKTokenizerFactory extends TokenizerFactory implements ResourceLoaderAware, UpdateKeeper.UpdateJob {
     private boolean useSmart;
     private ResourceLoader loader;
     private long lastUpdateTime = -1L;
     private String conf = "ik.conf";
 
-
     public IKTokenizerFactory(Map<String, String> args) {
         super(args);
         String useSmartArg = args.get("useSmart");
@@ -38,6 +36,13 @@ public class IKTokenizerFactory extends TokenizerFactory implements ResourceLoad
         return new IKTokenizer(factory, useSmart());
     }
 
+    /**
+     * 通知方法
+     * 当改方法被调用时，将当前实例注册到更新任务中
+     *
+     * @param resourceLoader 类路径资源加载实例
+     * @throws IOException IO读写异常
+     */
     @Override
     public void inform(ResourceLoader resourceLoader) throws IOException {
         System.out.println(String.format(":::ik:::inform:::::::::::::::::::::::: %s", this.conf));
@@ -48,12 +53,20 @@ public class IKTokenizerFactory extends TokenizerFactory implements ResourceLoad
         }
     }
 
+    /**
+     * 实现更新任务接口的更新方法
+     *
+     * @throws IOException 读取文件异常
+     */
     @Override
     public void update() throws IOException {
+        // 获取ik.conf配置文件信息
         Properties p = canUpdate();
         if (p != null) {
+            // 获取词典表名称集合
             List<String> dicPaths = SplitFileNames(p.getProperty("files"));
-            List inputStreamList = new ArrayList();
+            // 获取词典文件的IO流
+            List<InputStream> inputStreamList = new ArrayList<>();
             for (String path : dicPaths) {
                 if ((path != null) && (!path.isEmpty())) {
                     InputStream is = this.loader.openResource(path);
@@ -62,6 +75,7 @@ public class IKTokenizerFactory extends TokenizerFactory implements ResourceLoad
                     }
                 }
             }
+            // 如果IO流集合不为空则执行加载词典
             if (!inputStreamList.isEmpty())
                 Dictionary.reloadDic(inputStreamList);
         }
@@ -75,15 +89,15 @@ public class IKTokenizerFactory extends TokenizerFactory implements ResourceLoad
             if (this.conf == null)
                 return null;
             Properties p = new Properties();
-            InputStream confStream = this.loader.openResource(this.conf);
+            InputStream confStream = this.loader.openResource(this.conf);   // 获取配置文件流
-            p.load(confStream);
+            p.load(confStream);                                             // 读取配置文件
-            confStream.close();
+            confStream.close();                                             // 关闭文件流
-            String lastupdate = p.getProperty("lastupdate", "0");
+            String lastupdate = p.getProperty("lastupdate", "0");           // 获取最后更新数字
             Long t = new Long(lastupdate);
 
-            if (t > this.lastUpdateTime) {
+            if (t > this.lastUpdateTime) {                                  // 如果最后更新的数字大于上次记录的最后更新数字
-                this.lastUpdateTime = t;
+                this.lastUpdateTime = t;                                    // 将最后更新数字替换为当次的数字
-                String paths = p.getProperty("files");
+                String paths = p.getProperty("files");                      // 获取词典文件名
                 if ((paths == null) || (paths.trim().isEmpty()))
                     return null;
                 System.out.println("loading conf files success.");
@@ -97,11 +111,17 @@ public class IKTokenizerFactory extends TokenizerFactory implements ResourceLoad
         return null;
     }
 
+    /**
+     * 对多个文件名进行切割
+     *
+     * @param fileNames 多个文件名
+     * @return 文件名集合
+     */
     private static List<String> SplitFileNames(String fileNames) {
         if (fileNames == null) {
             return Collections.emptyList();
         }
-        List result = new ArrayList();
+        List<String> result = new ArrayList<>();
         Collections.addAll(result, fileNames.split("[,\\s]+"));
         return result;
     }