configuration via sql (done)

src/main/java/love/sola/netsupport/sql/SQLCore.java

@@ -1,5 +1,7 @@
 package love.sola.netsupport.sql;
 
+import com.google.gson.Gson;
+
 import javax.naming.InitialContext;
 import javax.sql.DataSource;
 
@@ -12,6 +14,7 @@ import javax.sql.DataSource;
 public class SQLCore {
 
 	public static DataSource ds;
+	public static Gson gson = new Gson();
 
 	static {
 		try {

src/main/java/love/sola/netsupport/sql/TableConfig.java

@@ -1,14 +1,39 @@
 package love.sola.netsupport.sql;
 
+import love.sola.netsupport.config.Settings;
+
+import java.sql.*;
+
 /**
  * ***********************************************
  * Created by Sola on 2015/11/10.
  * Don't modify this source without my agreement
  * ***********************************************
  */
-public class TableConfig {
+public class TableConfig extends SQLCore{
 
+	public static final String KEY_SYS = "sys";
 
-	
+	public static Settings getSettings() {
+		try (Connection conn = ds.getConnection()) {
+			Statement st = conn.createStatement();
+			ResultSet rs = st.executeQuery("SELECT * FROM settings WHERE type='" + KEY_SYS + "'");
+			if (rs.next()) {
+				return gson.fromJson(rs.getString("data"), Settings.class);
+			}
+		} catch (SQLException e) { }
+		return null;
+	}
+
+	public static int saveSettings(Settings obj) {
+		try (Connection conn = ds.getConnection()) {
+			PreparedStatement ps = conn.prepareStatement("UPDATE settings SET data=? WHERE type=?");
+			ps.setString(1, gson.toJson(obj));
+			ps.setString(2, KEY_SYS);
+			return ps.executeUpdate();
+		} catch (SQLException e) {
+		}
+		return -1;
+	}
 
 }