jjwt (Java JWT)<\/li>\n<\/ul>\n4.2. Project Structure<\/h3>\n
\n After creating the project, the basic package structure will be as follows:\n <\/p>\n
\n \u2514\u2500\u2500 src\n \u2514\u2500\u2500 main\n \u251c\u2500\u2500 java\n \u2502 \u2514\u2500\u2500 com\n \u2502 \u2514\u2500\u2500 example\n \u2502 \u2514\u2500\u2500 jwt_demo\n \u2502 \u251c\u2500\u2500 JwtDemoApplication.java\n \u2502 \u251c\u2500\u2500 controller\n \u2502 \u251c\u2500\u2500 model\n \u2502 \u251c\u2500\u2500 repository\n \u2502 \u251c\u2500\u2500 security\n \u2502 \u2514\u2500\u2500 service\n \u2514\u2500\u2500 resources\n \u251c\u2500\u2500 application.properties\n \u2514\u2500\u2500 static\n <\/pre>\n5. Database Configuration<\/h2>\n
\n We can use the H2 database to store user information.
\n Configure the application.properties file as follows:\n <\/p>\n
\n spring.h2.console.enabled=true\n spring.datasource.url=jdbc:h2:mem:testdb\n spring.datasource.driverClassName=org.h2.Driver\n spring.datasource.username=sa\n spring.datasource.password=\n spring.jpa.database-platform=org.hibernate.dialect.H2Dialect\n <\/pre>\n6. Creating a User Model<\/h2>\n
\n We create a User model class to hold user information.\n <\/p>\n
\n package com.example.jwt_demo.model;\n\n import javax.persistence.*;\n\n @Entity\n @Table(name = \"users\")\n public class User {\n @Id\n @GeneratedValue(strategy = GenerationType.IDENTITY)\n private Long id;\n\n @Column(nullable = false, unique = true)\n private String username;\n\n @Column(nullable = false)\n private String password;\n\n \/\/ Getters and Setters...\n\n public User() {}\n\n public User(String username, String password) {\n this.username = username;\n this.password = password;\n }\n }\n <\/pre>\n7. Creating a User Repository<\/h2>\n
\n We create a JPA repository interface to manage user information in the database.\n <\/p>\n
\n package com.example.jwt_demo.repository;\n\n import com.example.jwt_demo.model.User;\n import org.springframework.data.jpa.repository.JpaRepository;\n import org.springframework.stereotype.Repository;\n\n @Repository\n public interface UserRepository extends JpaRepository {\n User findByUsername(String username);\n }\n <\/pre>\n8. Security Configuration<\/h2>\n
\n We will implement JWT authentication through Spring Security. To do this, we create a SecurityConfig class that extends WebSecurityConfigurerAdapter.\n <\/p>\n
\n package com.example.jwt_demo.security;\n\n import com.example.jwt_demo.filter.JwtRequestFilter;\n import com.example.jwt_demo.service.UserDetailsServiceImpl;\n import org.springframework.beans.factory.annotation.Autowired;\n import org.springframework.context.annotation.Bean;\n import org.springframework.security.authentication.AuthenticationManager;\n import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;\n import org.springframework.security.config.annotation.web.builders.HttpSecurity;\n import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;\n import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;\n import org.springframework.security.config.http.SessionCreationPolicy;\n import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;\n\n @EnableWebSecurity\n public class SecurityConfig extends WebSecurityConfigurerAdapter {\n\n @Autowired\n private UserDetailsServiceImpl userDetailsService;\n\n @Autowired\n private JwtRequestFilter jwtRequestFilter;\n\n @Override\n protected void configure(AuthenticationManagerBuilder auth) throws Exception {\n auth.userDetailsService(userDetailsService);\n }\n\n @Override\n protected void configure(HttpSecurity http) throws Exception {\n http.csrf().disable()\n .authorizeRequests()\n .antMatchers(\"\/authenticate\").permitAll()\n .anyRequest().\n<\/pre>\n<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
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