Developing a document management system (DMS) with Java and Angular involves creating a backend server to handle document-related functionality and building a frontend application to provide a user interface for managing documents. Here’s an overview of the steps involved:

Backend Development (Java):

1. Set up the Development Environment:
   Install Java Development Kit (JDK) and an Integrated Development Environment (IDE) like IntelliJ IDEA or Eclipse.
2. Create a Java Project:
   Set up a new Java project using your preferred build tool (e.g., Maven or Gradle) and include necessary dependencies such as Spring Boot, Spring Data JPA, and Spring Security.
3. Design the Database Schema:
   Identify the entities required for your document management system, such as documents, folders, users, and permissions. Design the database schema and define the relationships between entities.
4. Implement Entity Classes:
   Create Java classes representing the entities in your database schema. Annotate them with JPA annotations (@Entity, @Table, @Column, etc.) to define the mapping between the Java objects and database tables.
5. Implement Repository Interfaces:
   Create repository interfaces by extending the JpaRepository interface provided by Spring Data JPA. These interfaces will provide CRUD operations and querying capabilities for each entity.
6. Implement Service Classes:
   Create service classes to handle the business logic of your document management system. These classes will interact with the repository interfaces to perform operations like creating, updating, and deleting documents.
7. Implement Controller Classes:
   Create RESTful API controller classes to handle incoming HTTP requests from the frontend application. Map these requests to appropriate service methods to perform operations like uploading, downloading, and searching documents.
8. Implement Security:
   Secure your document management system by implementing authentication and authorization mechanisms. Use Spring Security to handle user registration, login, and access control for different endpoints.

Frontend Development (Angular):

1. Set up the Development Environment:
   Install Node.js and Angular CLI on your machine.
2. Create an Angular Project:
   Use the Angular CLI to create a new Angular project. Set up the necessary routing and modules for your application.
3. Design the User Interface:
   Design and create the user interface components required for your document management system, such as login/signup pages, document listing, uploading, and searching components.
4. Implement Angular Services:
   Create Angular services to interact with the backend API endpoints. Use the HttpClient module to send HTTP requests to the backend server and handle responses.
5. Implement Angular Components:
   Implement Angular components to display and manage the user interface. Bind data from the backend API responses to display documents, folders, and user information. Implement forms and validations for uploading and searching documents.
6. Implement User Authentication:
   Implement user authentication and authorization features using Angular’s built-in modules or third-party libraries like Angular JWT. Allow users to register, login, and manage their document access permissions.
7. Test and Debug:
   Test your application by running both the backend and frontend applications simultaneously. Use Angular’s testing framework (Jasmine and Karma) to write unit tests for your Angular components and services.
8. Deploy the Application:
   Build the Angular application for production using the Angular CLI, and deploy it to a web server or a cloud platform like Heroku, Netlify, or AWS S3. Deploy the backend server to a Java application server or cloud platform like AWS Elastic Beanstalk or Heroku.
9. Monitor and Maintain:
   Set up monitoring tools and logs to track application performance. Regularly update and maintain the application to address bugs, add new features, and improve security.

Building a document management system with Java and Angular provides a scalable and customizable solution for organizing and managing documents. You can enhance the system by adding features like document versioning, document sharing, document previews, and advanced search

capabilities based on your requirements.