[TD-4746] add test case for irregular locale setting for java

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/BadLocaleSettingTest.java

+package com.taosdata.jdbc.cases;
+
+
+import com.taosdata.jdbc.TSDBDriver;
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import java.io.IOException;
+
+import java.sql.*;
+import java.util.Properties;
+
+public class BadLocaleSettingTest {
+
+    private static final String host = "127.0.0.1";
+    private static final String dbName = "bad_locale_test";
+    private static Connection conn;
+
+    @Test
+    public void canSetLocale() {
+        try {
+            Properties properties = new Properties();
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+
+            String url = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
+            conn = DriverManager.getConnection(url, properties);
+            Statement stmt = conn.createStatement();
+            stmt.execute("drop database if exists " + dbName);
+            stmt.execute("create database if not exists " + dbName);
+            stmt.execute("use " + dbName);
+            stmt.execute("drop table if exists weather");
+            stmt.execute("create table weather(ts timestamp, temperature float, humidity int)");
+            stmt.executeUpdate("insert into weather values(1624071506435, 12.3, 4)");
+            stmt.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @BeforeClass
+    public static void beforeClass() {
+        System.setProperty("sun.jnu.encoding", "ANSI_X3.4-1968");
+        System.setProperty("file.encoding", "ANSI_X3.4-1968");
+    }
+
+    @AfterClass
+    public static void afterClass() {
+        try {
+            if (conn != null)
+                conn.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+}
\ No newline at end of file