Spring Boot Login Page

last modified July 31, 2023

In this article we show how to work with a default login page. Spring security secures all HTTP endpoints by default. A user has to login in a default HTTP form.

To enable Spring Boot security, we add spring-boot-starter-security to the dependencies.

Spring Boot Login Page example

The following example shows how to set up a simple login page in a Spring Boot application.

build.gradle … src ├───main │ ├───java │ │ └───com │ │ └───zetcode │ │ │ Application.java │ │ └───controller │ │ MyController.java │ └───resources │ application.properties └───test └───java

This is the project structure of the Spring Boot application.

build.gradle

plugins { id ‘org.springframework.boot’ version ‘3.1.1’ id ‘io.spring.dependency-management’ version ‘1.1.0’ id ‘java’ }

group = ‘com.zetcode’ version = ‘0.0.1-SNAPSHOT’ sourceCompatibility = ‘17’

repositories { mavenCentral() }

dependencies { implementation ‘org.springframework.boot:spring-boot-starter-web’ implementation ‘org.springframework.boot:spring-boot-starter-security’ }

This is the Gradle build file. We have starters for web and security.

resources/application.properties

spring.main.banner-mode=off logging.pattern.console=%d{dd-MM-yyyy HH:mm:ss} %magenta([%thread]) %highlight(%-5level) %logger.%M - %msg%n

In the application.properties file, we turn off the Spring Boot banner and configure the console logging pattern.

com/zetcode/controller/MyController.java

package com.zetcode.controller;

import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController;

@RestController public class MyController {

@GetMapping("/")
public String home() {

    return "This is home page";
}

}

We have a simple home page.

We run the application and navigate to localhost:8080. We are redirected to the http://localhost:8080/login page.

… Using generated security password: df7ce50b-abae-43a1-abe1-0e17fd81a454 …

In the console, we can see a password generated for a default user called user. These credentials are provided to the authentication form.

Figure: Login form

Spring uses Bootstrap to define the UI.

spring.security.user.name = admin spring.security.user.password = s$cret

With these two options, we can have a new user name and password. The autogenerated user is turned off with these settings.

In this article we have worked with a default login form.

Author

My name is Jan Bodnar, and I am a passionate programmer with extensive programming experience. I have been writing programming articles since 2007. To date, I have authored over 1,400 articles and 8 e-books. I possess more than ten years of experience in teaching programming.

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