table and column names changed to Upper

src/main/java/entgra/mailsender/DAO/Impl/MailDAOImpl.java

@@ -38,7 +38,7 @@ public class MailDAOImpl implements MailDAO {
             PreparedStatement stmt;
             int generatedId;
             Connection conn = this.getConnection();
-            stmt = conn.prepareStatement("INSERT INTO email (EMAIL_ADDRESS, MSG_TEMPLATE, PRIORITY, ATTACHMENT, PARAMETERS, TIME, FILENAME, EXPIRY_AT) VALUES (?, ?, ?, ?, ?, ?, ?, ?)", PreparedStatement.RETURN_GENERATED_KEYS);
+            stmt = conn.prepareStatement("INSERT INTO EMAIL (EMAIL_ADDRESS, MSG_TEMPLATE, PRIORITY, ATTACHMENT, PARAMETERS, TIME, FILENAME, EXPIRY_AT) VALUES (?, ?, ?, ?, ?, ?, ?, ?)", PreparedStatement.RETURN_GENERATED_KEYS);
             Timestamp current_time = new Timestamp(System.currentTimeMillis());
             String parametersJson = new ObjectMapper().writeValueAsString(mailModel.getParameters());
             stmt.setString(1, mailModel.getEmailAddress());
@@ -70,7 +70,7 @@ public class MailDAOImpl implements MailDAO {
 
     @Override
     public List<MailModel> getUnsentMessages() {
-        String sql = "SELECT * FROM email WHERE email_id NOT IN (SELECT email_id FROM sentEmail)";
+        String sql = "SELECT * FROM EMAIL WHERE EMAIL_ID NOT IN (SELECT EMAIL_ID FROM SENTEMAIL)";
 
         List<MailModel> unsentMails = new ArrayList<>();
 
@@ -79,9 +79,9 @@ public class MailDAOImpl implements MailDAO {
              ResultSet rs = statement.executeQuery()) {
             while (rs.next()) {
                 MailModel mailModel = new MailModel();
-                mailModel.setEmailId(rs.getInt("email_id"));
-                mailModel.setPriority(rs.getInt("priority"));
-                mailModel.setExpiry_at(rs.getDate("expiry_at"));
+                mailModel.setEmailId(rs.getInt("EMAIL_ID"));
+                mailModel.setPriority(rs.getInt("PRIORITY"));
+                mailModel.setExpiry_at(rs.getDate("EXPIRY_AT"));
                 unsentMails.add(mailModel);
             }
         } catch (SQLException e) {
@@ -94,7 +94,7 @@ public class MailDAOImpl implements MailDAO {
 
     @Override
     public MailModel getMailDetails(Integer mail_id) {
-        String sql = "SELECT * FROM email WHERE email_id = ?";
+        String sql = "SELECT * FROM EMAIL WHERE EMAIL_ID = ?";
         MailModel mailModel = new MailModel();
 
         try {
@@ -103,19 +103,19 @@ public class MailDAOImpl implements MailDAO {
                 stmt.setInt(1, mail_id);
                 try (ResultSet rs = stmt.executeQuery()) {
                     while (rs.next()) {
-                        mailModel.setEmailId(rs.getInt("email_id"));
-                        mailModel.setEmailAddress(rs.getString("email_address"));
-                        mailModel.setMsgTemplate(rs.getString("msg_template"));
-                        mailModel.setPriority(rs.getInt("priority"));
+                        mailModel.setEmailId(rs.getInt("EMAIL_ID"));
+                        mailModel.setEmailAddress(rs.getString("EMAIL_ADDRESS"));
+                        mailModel.setMsgTemplate(rs.getString("MSG_TEMPLATE"));
+                        mailModel.setPriority(rs.getInt("PRIORITY"));
 
-                        String jsonData = rs.getString("parameters");
+                        String jsonData = rs.getString("PARAMETERS");
                         List<MailModel.Parameter> parameters = parseJsonParameters(jsonData);
                         mailModel.setParameters(parameters);
 
-                        String filename = rs.getString("filename");
+                        String filename = rs.getString("FILENAME");
                         mailModel.setFilename(filename);
 
-                        Blob blob = rs.getBlob("attachment");
+                        Blob blob = rs.getBlob("ATTACHMENT");
                         File file = convertBlobToFile(blob, filename);
                         mailModel.setFile(file);
                     }
@@ -161,7 +161,7 @@ public class MailDAOImpl implements MailDAO {
         try {
             PreparedStatement stmt;
             Connection connection = this.getConnection();
-            stmt = connection.prepareStatement("INSERT INTO sentEmail (email_id,sent_time) VALUE (?,?)");
+            stmt = connection.prepareStatement("INSERT INTO SENTEMAIL (EMAIL_ID,SENT_TIME) VALUE (?,?)");
             stmt.setInt(1, mail_id);
             stmt.setDate(2, Date.valueOf(LocalDate.now()));
             stmt.execute();

src/main/resources/application.properties

@@ -2,9 +2,9 @@ spring.mail.host=smtp.gmail.com
 spring.mail.port=587
 spring.mail.username=chandrasegar@entgra.io
 spring.mail.password=kfgt idre luvt ismk
-spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/email_sending
-spring.datasource.username=entgra
-spring.datasource.password=entgra123
+spring.datasource.url=jdbc:mysql://localhost:3306/email_sending
+spring.datasource.username=root
+spring.datasource.password=StrongPassword123!
 spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver