菜鸟学习shiro之实现自定义的Realm，从而实现登录验证，身份验证和权限验证4

短命女 2022-05-18 01:51 246阅读 0赞

讲了那么多使用的内置的类从而实现四郎，现在讲自定义的境界

首先行家的依赖依然是第一篇的那个依赖

下边是自定义的境界：

import org.apache.shiro.authc.AuthenticationException;
    import org.apache.shiro.authc.AuthenticationInfo;
    import org.apache.shiro.authc.AuthenticationToken;
    import org.apache.shiro.authc.SimpleAuthenticationInfo;
    import org.apache.shiro.authz.AuthorizationInfo;
    import org.apache.shiro.authz.SimpleAuthorizationInfo;
    import org.apache.shiro.crypto.hash.Md5Hash;
    import org.apache.shiro.realm.AuthorizingRealm;
    import org.apache.shiro.subject.PrincipalCollection;
    import org.apache.shiro.util.ByteSource;
    import org.omg.PortableInterceptor.SYSTEM_EXCEPTION;
    
    import java.util.HashMap;
    import java.util.HashSet;
    import java.util.Map;
    import java.util.Set;
    
    public class CustomRealm extends AuthorizingRealm {
    
        /*
        * 模拟数据库
        * */
        Map<String,String> userMap = new HashMap<>(16);
    
        {
            userMap.put("Mark","283538989cef48f3d7d8a1c1bdf2008f");
            super.setName("customRealm");
        }
    
        /*
        *   自定义的权限校验
        * */
        @Override
        protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
    
            String userName = (String)principalCollection.getPrimaryPrincipal();
            Set<String> roles = getRoleByUserName(userName);
            Set<String> permissions = getPermissionByUserName(userName);
            SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();
            simpleAuthorizationInfo.setRoles(roles);
            simpleAuthorizationInfo.setStringPermissions(permissions);
            return simpleAuthorizationInfo;
        }
    
        private Set<String> getPermissionByUserName(String userName) {
            Set<String> sets = new HashSet<>(16);
            sets.add("user:delete");
            sets.add("user:add");
            return sets;
        }
    
        /*
        *   这个是模拟数据库
        * */
        private Set<String> getRoleByUserName(String userName) {
            Set<String> sets = new HashSet<>(10);
            sets.add("admin");
            sets.add("user");
            return sets;
        }
    
        /*
        *  这是用户的登录授权
        * */
        @Override
        protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
    
            // 1.从主体传过来的认证信息中，获得用户名
            String userName = (String)authenticationToken.getPrincipal();
    
            // 2.通过用户名到数据库中获得凭证
    
            String password = getPasswordByUserName(userName);
    
            if (password == null) {
                return null;
            }
    
            SimpleAuthenticationInfo authenticationInfo = new SimpleAuthenticationInfo("Mark",password,"customRealm");
            // 这个是直接加盐在原来加密的基础上
            authenticationInfo.setCredentialsSalt(ByteSource.Util.bytes("Mark"));
            return authenticationInfo;
        }
    
        /*
        *   这是模拟数据库的
        * */
        private String getPasswordByUserName(String userName) {
            return userMap.get(userName);
        }
    
        // 这个是加密生成的字符串,后边加盐
      /*  public static void main(String[] args) {
            Md5Hash md5Hash = new Md5Hash("123456","Mark");
            System.out.println(md5Hash);
        }*/
    }

下边是测试的：

import com.example.demo.com.realm.CustomRealm;
    import org.apache.shiro.SecurityUtils;
    import org.apache.shiro.authc.UsernamePasswordToken;
    import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
    import org.apache.shiro.mgt.DefaultSecurityManager;
    import org.apache.shiro.realm.text.IniRealm;
    import org.apache.shiro.subject.Subject;
    import org.junit.Test;
    
    public class CustomRealmTest {
    
        @Test
        public void testAuthenticationTest() {
            // 这个是自定义的realm
            CustomRealm customRealm = new CustomRealm();
    
            // 1.构建SecurityManager环境
            DefaultSecurityManager defaultSecurityManager = new DefaultSecurityManager();
            defaultSecurityManager.setRealm(customRealm);
    
            // 这是散列加密工具的封装类啊
            HashedCredentialsMatcher matcher = new HashedCredentialsMatcher();
            matcher.setHashAlgorithmName("md5");
            matcher.setHashIterations(1);
            // 这一步是把自定义的散列加密集成到我自定义的认证机制中
            customRealm.setCredentialsMatcher(matcher);
    
            // 2.主体提交认证请求
            SecurityUtils.setSecurityManager(defaultSecurityManager);
            Subject subject = SecurityUtils.getSubject();
    
            // 这个是需要认证的信息
            UsernamePasswordToken token = new UsernamePasswordToken("Mark","123456");
            subject.login(token);
    
            System.out.println("isAuthenticated="+subject.isAuthenticated());
    
            //subject.logout();
    
        /*    System.out.println("isAuthenticated="+subject.isAuthenticated());
    
            subject.checkRole("admin");
            subject.checkPermissions("user:delete","user:update");*/
            /*subject.checkRole("admin");
            subject.checkPermission("user:add");*/
    
        }
    
    }

代码讲的很清楚了，我就不多说了。