SpringBoot登录判断过程代码实例

 
 
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  $(".button").click(function(e) { $("button", this).addClass('active'); if ($(".button").hasClass("login")){ $.ajax({ url:"/cch/dologin", type:"POST", data:{ name:$("#name").serialize(), pass:$("#pass").serialize(), }, success:function (result) { if(result.code==100){ window.location.href="/cch/main" rel="external nofollow" ; }else { alert(result.extendInfo.login_error); } } }) } })

 //JsonMsg工具类 public class JsonMsg { private int code; private String msg; private Map extendInfo = new HashMap(); public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public Map getExtendInfo() { return extendInfo; } public void setExtendInfo(Map extendInfo) { this.extendInfo = extendInfo; } public static JsonMsg success(){ JsonMsg res = new JsonMsg(); res.setCode(100); res.setMsg("操作成功"); return res; } public static JsonMsg fail(){ JsonMsg res = new JsonMsg(); res.setCode(200); res.setMsg("操作失败"); return res; } public JsonMsg addInfo(String key,Object object){ this.extendInfo.put(key,object); return this; } }

 /** * controller * 判断用户名和密码是否正确 */ 　　@RequestMapping(value = "/cch/dologin",method = RequestMethod.POST) @ResponseBody public JsonMsg dologin(HttpServletRequest request){ String username = request.getParameter("name"); String password = request.getParameter("pass"); System.out.println(username+" "+password); if (!"name=admin".equals(username) || !"pass=123".equals(password)){ return JsonMsg.fail().addInfo("login_error","用户名或密码错误"); } request.getSession().setAttribute("islogin","true");//如果正确，则在seesion里添加判断属性，可供拦截器判断是否登录过 return JsonMsg.success(); }

 //自定义拦截器 //如果未登录则跳回登录页 public class SysInterceptor extends HandlerInterceptorAdapter { /** * 进入拦截器后首先进入的方法 * 返回false则不再继续执行 * 返回true则继续执行 */ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println("我是拦截器：我进来了"); HttpSession session = request.getSession(); String islogin = (String)session.getAttribute("islogin"); if(islogin==null){ System.out.println("用户没有登录"); response.sendRedirect("/cch/login"); return false; } System.out.println("用户已登录"); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }

 //把拦截器添加到springboot中 @Configuration public class SessionConfig implements WebMvcConfigurer { @Override public void addInterceptors(InterceptorRegistry registry) { //拦截有 "/cch" 前缀的路径，除了 "/cch/login","/cch/dologin" registry.addInterceptor(new SysInterceptor()).excludePathPatterns("/cch/login","/cch/dologin").addPathPatterns("/cch/**"); } }