Controller without error handling

ConfigController.java

import org.springframework.web.bind.annotation.*;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.sql.*;

@RestController
@RequestMapping("/api/config")
public class ConfigController {
    
    private static final String DB_URL = "jdbc:mysql://localhost:3306/mydb";
    private static final String DB_USER = "admin";
    private static final String DB_PASSWORD = "password";
    
    @PostMapping("/enable")
    public String enableConfig(@RequestBody String jsonPayload) throws Exception {
        // Parse JSON - assumes it's valid
        ObjectMapper mapper = new ObjectMapper();
        ConfigRequest request = mapper.readValue(jsonPayload, ConfigRequest.class);
        
        // Save to database - assumes connection works
        Connection conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD);
        String sql = "INSERT INTO configurations (feature_name, enabled, updated_by) VALUES (?, ?, ?)";
        PreparedStatement stmt = conn.prepareStatement(sql);
        stmt.setString(1, request.getFeatureName());
        stmt.setBoolean(2, request.isEnabled());
        stmt.setString(3, request.getUpdatedBy());
        stmt.executeUpdate();
        
        // Never closes resources
        return "Success";
    }
    
    static class ConfigRequest {
        private String featureName;
        private boolean enabled;
        private String updatedBy;
        
        // Getters and setters omitted for brevity
        public String getFeatureName() { return featureName; }
        public void setFeatureName(String featureName) { this.featureName = featureName; }
        public boolean isEnabled() { return enabled; }
        public void setEnabled(boolean enabled) { this.enabled = enabled; }
        public String getUpdatedBy() { return updatedBy; }
        public void setUpdatedBy(String updatedBy) { this.updatedBy = updatedBy; }
    }
}