change

tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/components/TaosDemoCommandLineRunner.java

@@ -43,7 +43,7 @@ public class TaosDemoCommandLineRunner implements CommandLineRunner {
         // 读配置参数
         JdbcTaosdemoConfig config = new JdbcTaosdemoConfig(args);
         boolean isHelp = Arrays.asList(args).contains("--help");
-        if (isHelp) {
+        if (isHelp || config.host == null || config.host.isEmpty()) {
             JdbcTaosdemoConfig.printHelp();
             System.exit(0);
         }

tests/examples/JDBC/taosdemo/src/main/java/com/taosdata/taosdemo/mapper/impl/SubTableMapperImpl.java

+package com.taosdata.taosdemo.mapper.impl;
+
+import com.taosdata.taosdemo.domain.SubTableMeta;
+import com.taosdata.taosdemo.domain.SubTableValue;
+import com.taosdata.taosdemo.mapper.SubTableMapper;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.JdbcTemplate;
+
+import java.util.List;
+
+public class SubTableMapperImpl implements SubTableMapper {
+
+    private JdbcTemplate jdbcTemplate;
+
+    @Override
+    public int createUsingSuperTable(SubTableMeta subTableMeta) {
+        return 0;
+    }
+
+    @Override
+    public int insertOneTableMultiValues(SubTableValue subTableValue) {
+        return 0;
+    }
+
+    @Override
+    public int insertOneTableMultiValuesUsingSuperTable(SubTableValue subTableValue) {
+        return 0;
+    }
+
+    @Override
+    public int insertMultiTableMultiValues(List<SubTableValue> tables) {
+        return 0;
+    }
+
+    @Override
+    public int insertMultiTableMultiValuesUsingSuperTable(List<SubTableValue> tables) {
+        return 0;
+    }
+}