提交文件

src/main/java/util/APKVersionCodeUtils.java

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+package util;
+
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+
+
+public class APKVersionCodeUtils {
+
+    /**
+     * 获取版本号名称
+     *
+     * @param context 上下文
+     * @return
+     */
+    public static String getVerName(Context context) {
+        String verName = "";
+        try {
+            verName = context.getPackageManager().
+                    getPackageInfo(context.getPackageName(), 0).versionName;
+        } catch (PackageManager.NameNotFoundException e) {
+            e.printStackTrace();
+        }
+        return verName;
+    }
+
+}
+

src/main/java/util/MysqlDriver.java

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+package util;
+
+import java.sql.*;
+
+public class MysqlDriver {
+    public static Connection getConnection() {
+        Connection connection = null;
+        try {
+            Class.forName("com.mysql.cj.jdbc.Driver");
+            connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/" + "emoji" + "?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&useSSL=false", "root", "root");
+        } catch (ClassNotFoundException | SQLException e) {
+            e.printStackTrace();
+        }
+        return connection;
+    }
+
+    public static void close(Connection connection) {
+        if (connection != null) {
+            try {
+                connection.close();
+            } catch (SQLException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public static void close(PreparedStatement preparedStatement) {
+        if (preparedStatement != null) {
+            try {
+                preparedStatement.close();
+            } catch (SQLException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public static void close(ResultSet resultSet) {
+        if (resultSet != null) {
+            try {
+                resultSet.close();
+            } catch (SQLException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}