shiro简单使用

目录结构如下：

Paste_Image.png

jdbc-realm-ini.java配置文件如下

[main]
jdbcRealm=org.apache.shiro.realm.jdbc.JdbcRealm
dataSource=com.alibaba.druid.pool.DruidDataSource
dataSource.driverClassName=com.mysql.jdbc.Driver
dataSource.url=jdbc:mysql://localhost:3306/shiro
dataSource.username=root
dataSource.password=""
jdbcRealm.dataSource=$dataSource
#指向了框架实现的JdbcRealm，这个在系统里已经实现了
securityManager.realms=$jdbcRealm

然后新建数据库shiro,新建三个表，表明限制为users,user_role,user_permissions,然后就可以测试了
测试代码如下

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

/**
 * Created by zhouyueyue on 2017/3/22.
 */

public class shiroTest {
    @Test
    public void testHelloworld() {
        Factory factory =
                new IniSecurityManagerFactory("classpath:shiro-jdbc-realm.ini");
        //2、得到SecurityManager实例 并绑定给SecurityUtils,全局设置，设置一次即可
        SecurityManager securityManager = factory.getInstance();
        SecurityUtils.setSecurityManager(securityManager);//自动绑定当前线程，在多请求的环境下需要
        //3、得到Subject及创建用户名/密码身份验证Token（即用户身份/凭证）
        Subject subject = SecurityUtils.getSubject();
        UsernamePasswordToken token = new UsernamePasswordToken("zhang", "123");
        try {
            //4、登录，即身份验证
            //4.1 当使用realm时，login调用的时候会调用reaml实例中的getAuthenticationInfo函数,当使用Jdbcrealm时，会调用源码中的doGetAuthenticationInfo()函数
            subject.login(token);
        } catch (AuthenticationException e) {
            //5、身份验证失败
        }
        Assert.assertEquals(true, subject.isAuthenticated()); //断言用户已经登录

        //6、退出
        subject.logout();
    }
}

说明：JdbcRealm.java中将username作为主键即唯一值从如下源码可看出

private String[] getPasswordForUser(Connection conn, String username) throws SQLException {
        String[] result;
        boolean returningSeparatedSalt = false;
        switch (saltStyle) {
        case NO_SALT:
        case CRYPT:
        case EXTERNAL:
            result = new String[1];
            break;
        default:
            result = new String[2];
            returningSeparatedSalt = true;
        }
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            ps = conn.prepareStatement(authenticationQuery);
            ps.setString(1, username);
            // Execute query
            rs = ps.executeQuery();
            // Loop over results - although we are only expecting one result, since usernames should be unique
            boolean foundResult = false;
            while (rs.next()) {
                // Check to ensure only one row is processed,大于一列会抛出异常
                if (foundResult) {
                    throw new AuthenticationException("More than one user row found for user [" + username + "]. Usernames must be unique.");
                }
                result[0] = rs.getString(1);
                if (returningSeparatedSalt) {
                    result[1] = rs.getString(2);
                }
                foundResult = true;
            }
        } finally {
            JdbcUtils.closeResultSet(rs);
            JdbcUtils.closeStatement(ps);
        }
        return result;
    }

当然这里的username是下面函数的第一个参数
UsernamePasswordToken('输入主键','对应的密码')