java 前后端跨域问题解决

前端页面部署在nginx 上 ，后端代码部署在服务器上 ，前端访问后台会出现跨域问题

新建一个过滤器

/** * 开放跨域权限 * * */@Slf4jpublic class testFilter implements Filter {

    public void init(FilterConfig filterConfig) throws ServletException {    }

    public void doFilter(ServletRequest var1, ServletResponse var2, FilterChain var3) throws IOException, ServletException{

        // System.out.println("执行过滤操作");

        HttpServletResponse response = (HttpServletResponse) var2;

        response.setHeader("Access-Control-Allow-Origin", "*");

        response.setHeader("Access-Control-Allow-Headers",                "User-Agent,Origin,Cache-Control,Content-type,Date,Server,withCredentials,AccessToken");

        response.setHeader("Access-Control-Allow-Credentials", "true");

        response.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");

        response.setHeader("Access-Control-Max-Age", "1209600");

        response.setHeader("Access-Control-Expose-Headers", "accesstoken");

        response.setHeader("Access-Control-Request-Headers", "accesstoken");

        response.setHeader("Expires", "-1");

        response.setHeader("Cache-Control", "no-cache");

        response.setHeader("pragma", "no-cache");

        var3.doFilter(var1, response);    };

    public void destroy() {    }}

在配置文件中配置filter

@Beanpublic FilterRegistrationBean filterRegist() {    FilterRegistrationBean frBean = new FilterRegistrationBean();    frBean.setFilter(new testFilter());    frBean.addUrlPatterns("/*");

    return frBean;}

前端页面 ajax 中添加xhrFields: {  withCredentials: true},属性

原文地址：https://www.cnblogs.com/liangb/p/10943409.html