Java提高——06-shiro-自定义realm实现

冷不防 2021-07-25 14:02 400阅读 0赞

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# 4.2 自定义认证 Realm #

ShiroRun 代码不需要做任何变化。

### 4.2.1 自定义 Realm 类 ###

在项目中新建 com.samuel.realm.MyRealm

public class MyRealm extends AuthenticatingRealm { 
     	
     	@Override
    	 protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) 
    throws AuthenticationException { 
     			System.out.println("执行认证");
     //用户名
     			String username = token.getPrincipal().toString();
     //密码
     			String pwd = new String((char[])token.getCredentials());
     			System.out.println(username+" "+pwd);
      //先从数据库查询 select * from user where username=? 查看用户名是否存在
     			if(username.equals("admin")){ //假设用户名为 admin 时能从数据库中查询出来
     //根据之前查询出来的用户信息获取密码。假设查询出来的密码是 pwd
     			String password= "pwd";
     //此处需要注意，第二个参数是从数据库查询出来的密码，而不是传递过来的密码。
     //第三个参数自定义。但是尽量不重复了。常直接使用用户名当做 realname 名字。
    			 AuthenticationInfo info = new 
    			SimpleAuthenticationInfo(token.getPrincipal(),password,"realmname");
     //shiro 会判断从数据库查询出来的密码和客户端传递过来的密码是否一致。
    		 return info;
     }
     //返回 null 说明用户名不存在。
     			return null;
     } }

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