Shiro实现登陆登出操作(十)

步骤:

1:重写LoginController类,实现登录操作

@Controller
public class LoginController {
    @RequestMapping("/login")
    public String login(Model model, HttpServletRequest req) throws  Exception{
        //如果登陆失败从request中获取认证异常信息,shiroLoginFailure就是shiro异常类的全限定名
        String exceptionClassName = (String) req.getAttribute("shiroLoginFailure");
        //根据shiro返回的异常类路径判断,抛出指定异常信息
        if(exceptionClassName!=null){
            if (UnknownAccountException.class.getName().equals(exceptionClassName)) {
                //最终会抛给异常处理器
                model.addAttribute("errorMsg", "账号不存在");
            } else if (IncorrectCredentialsException.class.getName().equals(
                    exceptionClassName)) {
                model.addAttribute("errorMsg", "用户名/密码错误");
            } else {
                //最终在异常处理器生成未知错误.
                model.addAttribute("errorMsg", "其他异常信息");
            }
        }
        //此方法不处理登陆成功(认证成功),shiro认证成功会自动跳转到上一个请求路径
        //登陆失败还到login页面
        return "forward:/login.jsp";
    }
}

2:重写UserRealm中的doGetAuthenticationInfo, 注意需要注入IUserDAO对象操作数据库

public class UserRealm extends AuthorizingRealm {

    @Setter
    private IUserDAO userDAO;
    //认证操作
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken token) throws AuthenticationException {
        //从token中获取登录的用户名, 查询数据库返回用户信息
        String username = (String) token.getPrincipal();
        User user = userDAO.getUserByUsername(username);

        if(user == null){
            return null;
        }
        SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(user, 
                user.getPassword(),
                ByteSource.Util.bytes(user.getUsername()),
                getName());
        return info;
    }

    @Override
    public String getName() {
        return "UserRealm";
    }

    //授权操作
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principals) {
        return null;
    }
}

3:先请求/main, 再登录,登录成功直接跳转到main请求路径

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转载自blog.csdn.net/qq_37431224/article/details/103962958
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