Spring Security REST Basic Authentication

In this article, let’s learn how to enable Spring Security REST Basic Authentication. We will be setting up the Spring Security using XML configuration. We will be building the Employee Management system where in which you will be able to Create an Employee, Get all the Employee / particular Employee details, Modify an existing Employee and Delete the Employee.

Based on the HTTP verbs, our REST API does the below

Create Employee (POST) : Create a new Employee (/employee)
Get Employee By Id (GET) : Get a Employee based on id (/employee/1)
List of All Employees (GET) : Get all the Employees (/employees)
Update Employee (PUT) : Update a Employee (/employee)
Delete Employee (DELETE) : Delete a Employee (/employee/1)

Creating table

Create EMPLOYEE Table, simply Copy and Paste the following SQL query in the query editor to get the table created.

CREATE TABLE EMPLOYEE(
  ID int(10) NOT NULL,
  NAME varchar(50) NOT NULL,
  AGE int(10) NOT NULL,
  DEPT varchar(20) NOT NULL,
  PRIMARY KEY EMPLOYEE(ID));

INSERT INTO EMPLOYEE VALUES (1,'JIP1',10,'IT');
INSERT INTO EMPLOYEE VALUES (2,'JIP2',20,'IT');
INSERT INTO EMPLOYEE VALUES (3,'JIP3',30,'IT');
INSERT INTO EMPLOYEE VALUES (4,'JIP4',40,'IT');

Folder Structure:

Create a simple Maven Project “SpringRestSecurity” and create a package for our source files “com.javainterviewpoint” under src/main/java

Now add the following dependency in the POM.xml

<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>com.javainterviewpoint</groupId>
	<artifactId>SpringRestSecurity</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>SpringSecurityTutorial Maven Webapp</name>
	<url>http://maven.apache.org</url>

	<properties>
		<spring.version>4.3.21.RELEASE</spring.version>
		<security.version>4.2.10.RELEASE</security.version>
		<jdk.version>1.8</jdk.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<!-- Spring Security -->
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-core</artifactId>
			<version>${security.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-web</artifactId>
			<version>${security.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.security</groupId>
			<artifactId>spring-security-config</artifactId>
			<version>${security.version}</version>
		</dependency>
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>

		<!-- MySQL Dependency -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.13</version>
		</dependency>


		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-core</artifactId>
			<version>2.8.1</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.1</version>
		</dependency>
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>2.8.1</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>SpringRestSecurity</finalName>
		<plugins>
			<plugin>
				<artifactId>maven-compiler-plugin</artifactId>
				<configuration>
					<source>1.8</source>
					<target>1.8</target>
				</configuration>
				<version>3.0</version>
			</plugin>
		</plugins>
	</build>
</project>

Create the Java class Employee.java, EmployeeDAO.java, EmployeeDAOImpl.java and EmployeeController.java under com.javainterviewpoint folder.
Place the SpringConfig.xml and web.xml under the WEB-INF directory