What is PathVariable in the Spring Boot?
Last Updated :
23 Nov, 2021
Java language is one of the most popular languages among all programming languages. There are several advantages of using the java programming language, whether for security purposes or building large distribution projects. One of the advantages of using JAVA is that Java tries to connect every concept in the language to the real world with the help of the concepts of classes, inheritance, polymorphism, etc.
There are several other concepts present in java that increase the user-friendly interaction between the java code and the programmer such as generic, access specifiers, annotations in java, etc these features add an extra property to the class as well method of the java program. In this article, we will discuss what is path variable is in the spring boot.
Path variable in the spring boot represents different kinds of parameters in the incoming request with the help of @pathvariable annotation.
Note: First we need to establish the spring application in our project.
Spring Initializr is a web-based tool using which we can easily generate the structure of the Spring Boot project. It also provides various different features for the projects expressed in a metadata model. This model allows us to configure the list of dependencies that are supported by JVM. Here, we will create the structure of an application using a spring initializer and then use an IDE to create a sample GET route. Therefore, to do this, the following steps are followed:
Step 1: Go to Spring Initializr
Step 2: Fill in the details as per the requirements. For this application:
Project: Maven
Language: Java
Spring Boot: 2.2.8
Packaging: JAR
Java: 8
Dependencies: Spring Web
Step 3: Click on Generate which will download the starter project.
Step 4: Extract the zip file. Now open a suitable IDE and then go to File->New->Project from existing sources->Spring-boot-app and select pom.xml. Click on import changes on prompt and wait for the project to sync as pictorially depicted below as follows:
Note: In the Import Project for Maven window, make sure you choose the same version of JDK which you selected while creating the project.
Step 5: Go to src->main->java->com.gfg.Spring.boot.app, create a java class with the name Controller and add the annotation @RestController. Now create a GET API as shown below:
Example 1: Controller.java
@RestController
// Class
public class Controller {
@GetMapping("/hello/{name}/{age}")
public void insert(@PathVariable("name") String name,
@PathVariable("age") int age) {
// Print and display name and age
System.out.println(name);
System.out.println(age);
}
}
This application is now ready to run.
Step 6: Run the SpringBootAppApplication class and wait for the Tomcat server to start.
Note: The default port of the Tomcat server is 8080 and can be changed in the application.properties file.
Step 7: Lastly now go to the browser and enter the URL localhost:8080. Observe the output and now do the same for localhost:8080/hello/Aayush/23
Output:
Aayush
23
Similar Reads
Spring Boot - CRUD Operations using MySQL Database
CRUD stands for Create, Read/Retrieve, Update and Delete and these are the four basic operations that we perform on persistence storage. CRUD is data-oriented and the standardized use of HTTP methods. HTTP has a few methods which work as CRUD operations and do note they are very vital from a develop
7 min read
How to Implement One to Many Mapping in Spring Boot?
Spring Boot is built on the top of the spring and contains all the features of spring. Spring also provides JPA and hibernate to increase the data manipulation efficiency between the spring application and the database. In very simple terms we can say JPA (Java persistence API) is like an interface
3 min read
How to Run Your First Spring Boot Application in Eclipse IDE?
Spring Boot is built on the top of the spring and contains all the features of spring. And is becoming a favorite of developers these days because of its rapid production-ready environment which enables the developers to directly focus on the logic instead of struggling with the configuration and se
3 min read
How to Run Spring Boot Application?
Spring Boot is built on the top of Spring and contains all the features of Spring. And it is becoming a favorite of developers these days because of its rapid production-ready environment which enables the developers to directly focus on the logic instead of struggling with the configuration and set
8 min read
Spring Boot - Application Properties
Spring Boot is built on top of the Spring Framework and includes all its features while simplifying configuration and setup. It has become a favorite among developers because it provides a rapid, production-ready environment that allows them to focus on business logic instead of dealing with complex
3 min read
Spring Boot with H2 Database
H2 Database in Spring Boot is an embedded, open-source, and in-memory database. It is a relational database management system written in Java. It is a client/server application. It stores data in memory, not persist the data on disk. Here we will be discussing how can we configure and perform some b
6 min read
Spring Boot - CRUD Operations
CRUD stands for Create, Read/Retrieve, Update, and Delete and these are the four basic operations that we perform on persistence storage. CRUD is data-oriented and the standardized use of HTTP methods or there is a term for this called HTTP action verbs. HTTP has a few action verbs or methods that w
7 min read
Spring Boot - REST Example
In modern web development, most applications follow the Client-Server Architecture. The Client (frontend) interacts with the server (backend) to fetch or save data. This communication happens using the HTTP protocol. On the server, we expose a bunch of services that are accessible via the HTTP proto
4 min read
How to Change the Default Port in Spring Boot?
Spring Boot framework provides a default embedded server i.e. the Tomcat server for many configuration properties to run the Spring Boot application. The application runs on the default port which is 8080. As per the application need, we can also change this default port for the embedded server. In
4 min read
Spring Boot - Hello World
Spring Boot is built on top of the Spring Framework and contains all the features of Spring. It has become a favorite of developers these days because of its rapid production-ready environment, which enables the developers to directly focus on the logic instead of struggling with the configuration a
4 min read