禁用浏览器中的返回键 + 跨域在servlet 中的设置

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禁用返回键

deleteall(){
        history.pushState(null, null, document.URL);
        window.addEventListener('popstate', function () {
          history.pushState(null, null, document.URL);
        });
      },

跨域在servlet中的设置

public void cross(HttpServletRequest request, HttpServletResponse response) {
		response.setHeader("Access-Control-Allow-Origin",request.getHeader("origin"));
		response.setHeader("Access-Control-Allow-Credentials", "true");
	}