spring boot 拦截器登录判断及跳转

1.使用teymeleaf及属性

<dependency>
    <groupId>org.spring work.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

spring.thymeleaf.servlet.content-type=text/html
spring.thymeleaf.cache=false //禁止缓存，用于开发
spring.thymeleaf.mode=LEGACYHTML5
spring.thymeleaf.encoding=UTF-8

2.拦截器(通过session的属性name判断是否登录，登录放行，未登录记下原来的后缀路径在preurl中,然后重定向到登录页面,就是域名了,request.getRequestURL()完整路径,request.getRequestURI()后缀路径,tempContextUrl是域名,response.sendRedirect()重定向

public class Interceptor1 implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,  handler) throws Exception{
        HttpSession session=request.getSession();
          ob=session.getAttribute(\"name\");
        if (ob!=null) {
            return true;
        }
        session.setAttribute(\"preurl\",request.getRequestURI());
        StringBuffer url = request.getRequestURL();
        String tempContextUrl = url.delete(url.length() - request.getRequestURI().length(), url.length()).append(request.getServletContext().getContextPath()).append(\"/\").toString();
        response.sendRedirect(tempContextUrl);
        return false;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response,
                             handler,ModelAndView model) throws Exception{
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response,
                              handler,Exception ex) throws Exception{
    }
}

3.注册拦截器(拦截所有路径，除了/login)

@SpringBootApplication
@EnableCaching
public class Application implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry){
        InterceptorRegistration ir=registry.addInterceptor(new Interceptor1());
        ir.addPathPatterns(\"/**\");
        ir.excludePathPatterns(\"/login\");
    }
}

4登录controller(我这里没验证，返回原来路径或者ok)

@RequestMapping(\"/login\")
@ResponseBody
public String bbb(String name, String password, HttpSession session){
    session.setMaxInactiveInterval(1*60);
    System.err.println(name+\' \'+password);
    session.setAttribute(\"name\",name);
    session.setAttribute(\"password\",password);
      ob=session.getAttribute(\"preurl\");
    if (ob!=null) {
        return ob.toString();
    }
    return \"ok\";
}

5前端处理(根据data跳转到对应的路径)

$.post(\"/login\",
       {
           name:$(\"#a\").val(),
           password:$(\"#b\").val()
       },
       function(data){
           if (data!=\'ok\') {
               window.location.href = \'http://\' + location.host + data;
           }
           else window.location.href = \'http://\' + location.host + \'/main\';
       }
)