单点登录-同域名

该篇文章基于cookie实现，局限性很大，仅供学习，实际项目不要这么用。

1 首先新建项目一，项目结构如下图

2 接着将该项目端口设为8081；

3 接着编写一个项目1主页

4 接着编写主页控制器，代码如下

package com.chenyulin.controller;

import com.chenyulin.util.SSOCheck;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;

/**
 * Created by Administrator on 2017/6/29.
 */
@Controller
public class Demo1Controller {
    private  String gotoUrl;
    @GetMapping("/demo1")
    public ModelAndView main(HttpServletRequest request){
        if (SSOCheck.checkCookie(request)) {
            ModelAndView m1 = new ModelAndView("Demo1");
            return m1;
        }
        //failed to login add "gotoUrl"
        gotoUrl = "/demo1";
        ModelAndView m2 = new ModelAndView("redirect:http://127.0.0.1:8080/intoLogin");
        m2.addObject("gotoUrl", gotoUrl);
        return m2;
    }
}

工具类代码如下

package com.chenyulin.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

/**
 * Created by Administrator on 2017/6/29.
 */
public class SSOCheck {

    public static boolean checkCookie(HttpServletRequest request) {
        Cookie[] cookies = request.getCookies();
        if (cookies != null) {
            for (Cookie cookie : cookies) {
                if (cookie.getName().equals("ssocookie")&&cookie.getValue().equals("sso")) {
                    return true;
                }
            }
        }

        return false;
    }
}

5 然后是认证中心

控制器代码

package com.chenyulin.controller;

import com.chenyulin.util.SSOCheck;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.ModelAndViewDefiningException;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by Administrator on 2017/6/29.
 */
@Controller
public class LoginController {
    @GetMapping("/intoLogin")
    private ModelAndView intoLogin(@RequestParam String gotoUrl) {
        ModelAndView m=new ModelAndView("login");
        m.addObject("gotoUrl", gotoUrl);
        return m;
    }
    @PostMapping("login")
    private String doLogin(@RequestParam String username, @RequestParam String password, @RequestParam String gotoUrl, HttpServletResponse response) {
        boolean ok = SSOCheck.checkLogin(username, password);
        if (ok) {
            Cookie cookie = new Cookie("ssocookie", "sso");
            cookie.setPath("/");
            response.addCookie(cookie);
            return "redirect:http://127.0.0.1:8081"+gotoUrl;
        }
        return null;
    }
}

工具类代码

package com.chenyulin.util;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;

/**
 * Created by Administrator on 2017/6/29.
 */
public class SSOCheck {
    private static final String USERNAME = "user";
    private static final String PASSWORD = "123";

    public static boolean checkLogin(String username, String password) {
        if (username != null && password != null) {
            if (username.equals(USERNAME) && password.equals(PASSWORD)) {
                return true;
            }
        }
        return false;
    }

}

6 项目2，将项目2的端口改为8082，其它如同项目一，简单，略去
同时启动两项目和认证中心，输入：127.0.0.1:8081/demo1启动进入项目1登录页；127.0.0.1:8082/demo2启动进入项目2登录页；任意登录一个即可实现来回穿梭。
下面附上源码下载地址：http://download.csdn.net/detail/qwqw3333333/9884753
本人初涉，如有不足请指正，万分感谢qq：569265915