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Spring boot

Creating a Spring Boot Project: A Comprehensive Guide

by Vermadeals
written by Vermadeals

Creating a Spring Boot project can be a daunting task, especially for beginners. However, with the right guidance and tools, it can be a straightforward process. In this article, we will guide you through the steps to create a Spring Boot project and provide you with essential tips and best practices to make your project a success.

Introduction to Spring Boot

Spring Boot is a popular Java framework used to build robust, scalable, and highly maintainable web applications. It provides developers with a variety of features, including a powerful web framework, efficient data access, and seamless integration with other Spring projects. With Spring Boot, developers can create standalone, production-ready applications with minimal setup and configuration.

Step-by-Step Guide to Creating a Spring Boot Project

Follow these steps Step-by-Step to create a Spring Boot project:

  1. Install Java and Maven: Before creating a Spring Boot project, you need to ensure that you have Java and Maven installed on your computer. If you don’t have them installed, you can download and install them from their respective websites.
  2. Choose a Development Environment: You can use any integrated development environment (IDE) of your choice, but we recommend using either Eclipse or IntelliJ IDEA. Both provide excellent support for Spring Boot projects and make it easier to develop, test, and deploy your application.
  3. Create a New Project: Once you have set up your development environment, you can create a new Spring Boot project. To do this, open your IDE and follow these steps:
    • Click on
      “File” -> “New” -> “Spring Starter Project”
    • Enter a name for your project and select the required dependencies for your application
    • Click on “Finish” to create your project
  4. Configure Your Application: Once you have created your project, you need to configure it to match your requirements. This includes setting up your database connection, defining your application properties, and configuring your web server.
  5. Write Your Code: With your application configured, you can start writing your code. Spring Boot provides an excellent web framework that makes it easy to develop your application. You can use either the Model-View-Controller (MVC) architecture or the RESTful architecture to develop your application.
  6. Test Your Application: Before deploying your application, it’s important to test it to ensure that it’s working correctly. Spring Boot provides excellent testing frameworks, including JUnit and Mockito, that make it easy to test your application.
  7. Deploy Your Application: Once you have tested your application and are satisfied with the results, you can deploy it to your production environment. Spring Boot provides various options for deployment, including deploying your application as a standalone executable JAR file or deploying it to a container.

    Best Practices for Creating a Spring Boot Project

    When creating a Spring Boot project, it’s important to follow best practices to ensure that your application is scalable, maintainable, and robust. Here are some best practices to you need to learn and keep in mind:

    • Follow the SOLID Principles: The SOLID principles are a set of best practices for writing maintainable and scalable code. They include Single Responsibility Principle, Open-Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle. Following these principles will make your code more readable, maintainable, and testable.
    • Use Best Practices for Database Access: When accessing the database, use best practices to ensure that your application is scalable and efficient. This includes using connection pooling, caching, and using the appropriate SQL statements.
    • Use Caching: Caching can significantly improve the performance of your application. Use caching frameworks, such as Ehcache or Redis, to cache frequently accessed data and reduce the number of database queries.
    • Secure Your Application: Security is a critical aspect of any web application. Use best practices to secure your application, such as encrypting sensitive data, using secure authentication and authorization mechanisms, and protecting against common web vulnerabilities.
    • Monitor and Optimize Your Application: Monitor your application to identify potential issues and optimize its performance. Use tools like Spring Boot Actuator and Micrometer to monitor your application’s performance and identify potential bottlenecks.
    • Use Spring Boot Starters: Spring Boot starters are pre-configured dependencies that make it easy to add common functionality to your application. Use starters to add features like logging, database access, and security to your application with minimal configuration.
    • Use External Configuration: Use external configuration to separate configuration from code. This makes it easier to change the configuration of your application without modifying the code. Spring Boot provides excellent support for external configuration through properties files, YAML files, or environment variables.

      Conclusion

      Creating a Spring Boot project can be a straightforward process if you follow the right steps and best practices. In this article, we provided a comprehensive guide to creating a Spring Boot project and essential tips to make your project a success. By following these best practices, you can build a robust, scalable, and highly maintainable web application that meets your requirements.

      With the right guidance and tools, you can create a Spring Boot project that outranks other websites. If you need further assistance, don’t hesitate to contact us. We are always here to help.

       

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PASSWORD ENCODER MATCH NOT WORKING SPRING BOOT
Spring bootStackoverflow

Password Encoder Match not working Spring boot

by Vermadeals
written by Vermadeals

Answer – 

passwordEncoder.matches(loginDTO.getEmail())

'matches(java.lang.CharSequence, java.lang.String)' in 'org.springframework.security.crypto.password.PasswordEncoder' cannot be applied to '(java.lang.String)'

Solution –

The error message you are seeing is indicating that the matches method of the PasswordEncoder interface expects two arguments: a CharSequence and a String. However, the code is passing a String as the first argument.

To fix this error, you can convert the String to a CharSequence before calling the matches method. You can do this using the CharSequence interface or by using a String as a CharSequence directly.

Here’s an example of how to fix the error using the CharSequence interface:

CharSequence password = loginDTO.getPassword();
String encodedPassword = user.getPassword(); // assume this is the encoded password from the database
if (passwordEncoder.matches(password, encodedPassword)) {
    // Passwords match
} else {
    // Passwords do not match
}

And here’s an example of how to fix the error by using a String as a CharSequence directly:

String password = loginDTO.getPassword();
String encodedPassword = user.getPassword(); // assume this is the encoded password from the database
if (passwordEncoder.matches(password, encodedPassword)) {
    // Passwords match
} else {
    // Passwords do not match
}

Either way, the important thing is to ensure that the first argument to the matches method is a CharSequence.

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HOW TO CONFIGURE PORT FOR A SPRING BOOT APPLICATION
Spring boot

How to configure port for a Spring Boot application

by Vermadeals
written by Vermadeals

To configure the TCP/IP port used by a Spring Boot application, you can specify the server.port property in the application.properties file or the application.yml file.

Here’s how to set the port to 9000 using the application.properties file:

1. Create a file named application.properties in the src/main/resources directory of your project.

2. Add the following line to the file:

server.port=9000

This sets the TCP/IP port to 9000. You can replace 9000 with any valid port number.

Here’s how to set the port to 9000 using the application.yml file:

1. Create a file named application.yml in the src/main/resources directory of your project.

Add the following lines to the file:

server:
  port: 9000

This sets the TCP/IP port to 9000.

Once you have made the changes to the application.properties or application.yml file, Spring Boot will automatically pick up the new configuration the next time you run your application. If you have already started your Spring Boot application, you will need to stop and restart it for the new port configuration to take effect.

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How to create custom filter in Spring Boot
Spring bootStackoverflow

How to create custom filter in Spring Boot

by Vermadeals
written by Vermadeals

Yes, in Spring Boot, you can add a custom filter to your web application using the @Component and @Order annotations.

Here’s an example of how you can create a custom filter:

1. Create a new class and annotate it with @Component to mark it as a Spring bean.

@Component
public class CustomFilter implements Filter {
    // Implement the methods of the Filter interface
}

2. Implement the methods of the javax.servlet.Filter interface in your custom filter class.

@Component
public class CustomFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        // Initialization logic
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // Filter logic
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {
        // Cleanup logic
    }
}

3. Use the @Order annotation to specify the order in which the filter should be applied. Lower numbers are processed first.

@Component
@Order(1)
public class CustomFilter implements Filter {
    // Implement the methods of the Filter interface
}

4. Spring Boot will automatically register your custom filter with the servlet container, and it will be applied to all incoming requests.

Note that you can also use the @WebFilter annotation instead of @Component to define a filter class. The @WebFilter annotation is a standard Java EE annotation, but it works in Spring Boot as well.

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Creating-a-spring-boot-project-Vermadeals
JavaSpring boot

Create spring boot application in IntelliJ idea

by Vermadeals
written by Vermadeals

First, you need to IntelliJ IDEA for development then click and download IntelliJ IDEA.

  1. Click create new project button:
Click create new project button
Click create new project button

2.  Create the Maven project:

Create the Maven project
Create the Maven project

3. Enter your project name:

Enter your project name
Enter your project name

4. Add the following dependency in the pom.xml file:

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <version>2.5.1</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <version>2.3.4.RELEASE</version>
    </dependency>
</dependencies>

5. POM.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>org.example</groupId>
    <artifactId>Spring_Boot_Rest_APIs</artifactId>
    <version>1.0-SNAPSHOT</version>
 
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.5.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>2.3.4.RELEASE</version>
        </dependency>
    </dependencies>
</project>

6. Create one main class Application.java:

package com;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.web.WebApplicationInitializer;
 
@SpringBootApplication
public class Application extends SpringBootServletInitializer implements WebApplicationInitializer {
    public static void main(String[] arg){
        SpringApplication.run(Application.class,arg);
    }
}

7. Create one testing Controller class PingController.java:

package com.controller;
 
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class PingController {
 
    @RequestMapping(value = "/Hello", method = RequestMethod.GET)
    public String ping(){
        return "Subscribe Technical Ramchander Youtube Channel";
    }
}

8. Now Run your application.java application-

First right-click in your application class and then click to run button

After running your application:

localhost

Go to Brower and run this URL –

 http://localhost:8080/Hello

Jai Hind Vande Mataram

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How-to-create-a-spring-boot-project-in-IntelliJ-IDEA
JavaSpring boot

How To Create A Spring-Boot Project in IntelliJ IDEA

by Vermadeals
written by Vermadeals

How To Create A Spring-Boot Project in IntelliJ IDEA

  1. Click create new project button

2. Create Maven project.

3. Enter your project name

4. Add following dependency in pom.xml file –>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
        <version>2.3.4.RELEASE</version>
    </dependency>
</dependencies>

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>Myfirstspringbootproject</artifactId>
    <version>1.0-SNAPSHOT</version>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.5.RELEASE</version>
    </parent>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

</project>

5. Create one main class Application.java->

package com;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}
}

6. Create one testing Controller class HelloController.java-

package com;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping(value = "Hello", method = RequestMethod.GET)
    public String Hello(){
        return "Subscribe Vermadeals Youtube Channel";
    }
}

7. Now Run your application.java application-

First right click in your application class and then click to run button.

8. After run your application-

Go to Brower and run this URL – http://localhost:8080/Hello

Jai Hind Vande Mataram

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