I'm trying to implement OAuth2.0 in my Spring Boot backend service, but I'm encountering the following error when adding my SecurityConfig class:
Caused by: java.lang.NoClassDefFoundError: javax/servlet/Filter at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na] ...Caused by: java.lang.ClassNotFoundException: javax.servlet.Filter ...This issue occurs specifically when I add the following configuration class:
package com.trojan.loginserver.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.security.config.annotation.web.builders.HttpSecurity;import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;import org.springframework.security.web.SecurityFilterChain;import static org.springframework.security.config.Customizer.withDefaults;@Configuration@EnableWebSecuritypublic class SecurityConfig { @Bean public SecurityFilterChain filterChain(HttpSecurity http) throws Exception { http .authorizeHttpRequests(authorize -> authorize .anyRequest().authenticated() ) .oauth2Login(withDefaults()); return http.build(); }}Here's my 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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>3.3.4</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.trojan</groupId><artifactId>login-server</artifactId><version>0.0.1-SNAPSHOT</version><name>login-server</name><description>login-server</description><url/><licenses><license/></licenses><developers><developer/></developers><scm><connection/><developerConnection/><tag/><url/></scm><properties><java.version>17</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><scope>runtime</scope><optional>true</optional></dependency><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.mockito</groupId><artifactId>mockito-core</artifactId><scope>test</scope></dependency><dependency><groupId>io.projectreactor</groupId><artifactId>reactor-test</artifactId><scope>test</scope></dependency><dependency><groupId>org.jetbrains</groupId><artifactId>annotations</artifactId><version>RELEASE</version><scope>compile</scope></dependency><dependency><groupId>io.jsonwebtoken</groupId><artifactId>jjwt</artifactId><version>0.9.1</version></dependency><dependency><groupId>org.springframework.session</groupId><artifactId>spring-session-core</artifactId><version>3.2.1</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-logging</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-security</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-oauth2-client</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin><plugin><groupId>com.google.cloud.tools</groupId><artifactId>jib-maven-plugin</artifactId><version>3.3.0</version> <!-- Update to the latest version --><configuration><from><image>openjdk:17-jdk-slim</image></from><to><image>trojan2877/login-server</image></to></configuration></plugin></plugins></build></project>I believe the issue might be related to missing servlet dependencies, but I'm not sure how to resolve it in Spring Boot 3.x. I've checked similar issues online, but nothing seems to work.
Has anyone else encountered this issue or have suggestions on how to resolve it?
Link to project: GitHub Link