package com.github.zhangkaitao.shiro.chapter7.web.servlet;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.subject.Subject;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* <p>User: Zhang Kaitao
* <p>Date: 14-1-29
* <p>Version: 1.0
*/
@WebServlet(name = "loginServlet", urlPatterns = "/login")
public class LoginServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String error = null;
String username = req.getParameter("username");
String password = req.getParameter("password");
Subject subject = SecurityUtils.getSubject();
UsernamePasswordToken token = new UsernamePasswordToken(username, password);
token.setRememberMe(true);
try {
subject.login(token);
} catch (UnknownAccountException e) {
error = "用户名/密码错误";
} catch (IncorrectCredentialsException e) {
error = "用户名/密码错误";
} catch (AuthenticationException e) {
//其他错误，比如锁定，如果想单独处理请单独catch处理
error = "其他错误：" + e.getMessage();
}
if(error != null) {//出错了，返回登录页面
req.setAttribute("error", error);
req.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(req, resp);
} else {//登录成功
req.getRequestDispatcher("/WEB-INF/jsp/loginSuccess.jsp").forward(req, resp);
}
}
}