maven

<dependency>  
            <groupId>org.apache.shiro</groupId>  
            <artifactId>shiro-core</artifactId>  
            <version>1.2.4</version>  
        </dependency>  
        <dependency>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-log4j12</artifactId>  
            <version>1.7.12</version>  
</dependency>

shiro.ini

[users]
lzh=123

java

package shiro;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.config.Ini;
import org.apache.shiro.config.IniSecurityManagerFactory;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.Factory;

public class ShiroDemo {
    public static void main(String[] args) {
        // 初始化SecurityFactory工厂  
        Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");  
        // 获取SessionFactory实例  
        SecurityManager securityManager = factory.getInstance();  
        // 把SecurityManager实例绑定到SecurityUtils  
        SecurityUtils.setSecurityManager(securityManager);  
        // 获得当前执行的用户  
        Subject currentUser = SecurityUtils.getSubject();  
        // 创建token令牌，用户名/密码  
        UsernamePasswordToken token = new UsernamePasswordToken("lzh",  
                "123");  
        try {  
            //身份认证  
            currentUser.login(token);  
            System.out.println("身份认证成功！");  
        } catch (AuthenticationException e) {  
            e.printStackTrace();  
            System.out.println("身份认证失败！");  
        }  
    }
}