Java后端开发：使用Java Authentication and Authorization Service进行API多角色权限管理

Sample {
    com.example.security.SimpleLoginModule required;
};

package com.example.security;

import java.util.Map;
import javax.security.auth.Subject;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;

public class SimpleLoginModule implements LoginModule {

    private Subject subject;
    private CallbackHandler callbackHandler;
    private Map<String, ?> sharedState;
    private Map<String, ?> options;
    private String username;

    public void initialize(
        Subject subject,
        CallbackHandler callbackHandler,
        Map<String, ?> sharedState,
        Map<String, ?> options
    ) {
        this.subject = subject;
        this.callbackHandler = callbackHandler;
        this.sharedState = sharedState;
        this.options = options;
    }

    public boolean login() throws LoginException {
        Callback[] callbacks = new Callback[2];
        callbacks[0] = new NameCallback("username: ");
        callbacks[1] = new PasswordCallback("password: ", false);

        try {
            callbackHandler.handle(callbacks);

            String username = ((NameCallback) callbacks[0]).getName();
            String password = String.valueOf(((PasswordCallback) callbacks[1]).getPassword());

            // 验证用户名和密码，通过返回true
            if ("admin".equals(username) && "123456".equals(password)) {
                this.username = username;
                return true;
            } else {
                throw new LoginException("Invalid username or password");
            }
        } catch (UnsupportedCallbackException | IOException e) {
            e.printStackTrace();
            throw new LoginException(e.getMessage());
        }
    }

    public boolean commit() throws LoginException {
        subject.getPrincipals().add(new SimplePrincipal(username));
        return true;
    }

    public boolean abort() throws LoginException {
        return true;
    }

    public boolean logout() throws LoginException {
        subject.getPrincipals().removeIf(principal -> principal.getName().equals(username));
        return true;
    }

}

@RolesAllowed({"admin","user"})
@Path("/api/hello")
public class HelloResource {

    @GET
    public Response greet() {
        return Response.ok("Hello World!").build();
    }

}

<server>
  ...
  <featureManager>
    ...
    <feature>appSecurity-2.0</feature>
  </featureManager>
  ...
</server>

<login-config>
  <auth-method>FORM</auth-method>
  <realm-name>sampleRealm</realm-name>
  <form-login-config>
    <form-login-page>/login.html</form-login-page>
    <form-error-page>/error.html</form-error-page>
  </form-login-config>
</login-config>

<security-constraint>
  <web-resource-collection>
    <web-resource-name>helloResource</web-resource-name>
    <url-pattern>/api/hello</url-pattern>
  </web-resource-collection>
  <auth-constraint>
    <role-name>admin</role-name>
    <role-name>user</role-name>
</auth-constraint>