Sharing of "identity mapping 'framework practice experience based on the Java class library

Sharing of "identity mapping 'framework practice experience based on the Java class library Introduction: The identity mapping refers to the process of mapping users of different identities into a system with corresponding permissions or characters.When developing complex applications, identity mapping is very important, which can help us manage user permissions and access control.The identity mapping framework based on the Java library can greatly simplify the development process and improve safety and maintenance.This article will share some practical experience and example code to help readers understand and apply this framework. 1. Choose the right Java class library When developing an identity mapping framework, it is important to choose the appropriate Java class library.Some commonly used libraries include Apache Shiro, Spring Security, and JaaS.Select a class library that suits your project requirements and understand its characteristics and usage. 2. User certification The first step of identity mapping is user certification.Users need to provide vouchers, and the framework confirms the user's identity by verifying these vouchers.The following is an example code that uses Apache Shiro for user certification: // Create Subject instance Subject currentUser = SecurityUtils.getSubject(); // Create a user name password token UsernamePasswordToken token = new UsernamePasswordToken(username, password); try { // Login authentication currentUser.login(token); // Successful authentication, perform some operations } catch (AuthenticationException e) { // The certification fails, the processing is abnormal } 3. User authorization Once the user's certification is successful, the next step is to authorize the user, that is, determine the operation that it can execute according to the identity and role of the user.The following is an example code that uses Spring Security for user authorization: @Configuration @EnableWebSecurity public class SecurityConfig extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.authorizeRequests() .antMatchers("/admin/**").hasRole("ADMIN") .antMatchers("/user/**").hasAnyRole("USER", "ADMIN") .anyRequest().authenticated() .and().formLogin(); } @Autowired public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception { auth.inMemoryAuthentication() .withUser("user").password("{noop}password").roles("USER") .and() .withUser("admin").password("{noop}password").roles("ADMIN"); } } 4. Power management In addition to authorizing users, the identity mapping framework can also be used for management authority.Power management includes access control of specific operations or resources.The following is an example code that uses JaaS for permission management: LoginContext lc = new LoginContext("Sample", new SampleCallbackHandler()); lc.login(); Subject subject = new Subject(); Subject.doAs(subject, new Action() { @Override public Object run() throws Exception { // Inspection authority return null; } }); Summarize: The identity mapping framework based on the Java class library can greatly simplify the process of identity verification and authorization, and improve the safety and maintenance of the system.By selecting the appropriate class library and the correct use of example code, we can easily develop identity mapping functions and realize flexible user permissions and access control in the application.It is hoped that the experience of this article will be helpful to readers and can better apply identity mapping frameworks in practice. Reference materials: - Apache Shiro: https://shiro.apache.org/ - Spring Security: https://spring.io/projects/spring-security - JAAS: https://docs.oracle.com/javase/8/docs/technotes/guides/security/jaas/JAASRefGuide.html