前端采用vue，后端采用springboot+微服务+网关，进行对接时出现以下报错怎么解决Access to XMLHttpRequest at 'http://127.0.0.1:8090/user/admin/register' from origin 'http://localhost:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

在Vue前端和Spring Boot后端中解决CORS问题，你可以尝试以下方法： 1. 后端配置CORS过滤器：在Spring Boot后端的网关服务中，添加一个CORS过滤器，处理跨域请求。你可以创建一个类实现`javax.servlet.Filter`接口，然后在`doFilter()`方法中设置响应头，包括`Access-Control-Allow-Origin`字段。示例代码如下： ```java import javax.servlet.*; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; @Component public class CorsFilter implements Filter { @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest httpRequest = (HttpServletRequest) request; HttpServletResponse httpResponse = (HttpServletResponse) response; httpResponse.setHeader("Access-Control-Allow-Origin", "*"); httpResponse.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS"); httpResponse.setHeader("Access-Control-Max-Age", "3600"); httpResponse.setHeader("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With"); if ("OPTIONS".equalsIgnoreCase(httpRequest.getMethod())) { httpResponse.setStatus(HttpServletResponse.SC_OK); } else { chain.doFilter(request, response); } } } ``` 2. 配置Spring Security：如果你在后端使用了Spring Security来进行身份验证和授权，你可以在配置类中添加以下代码来解决CORS问题： ```java @Configuration @EnableWebSecurity public class SecurityConfig extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http.cors().and().csrf().disable(); } @Bean public CorsConfigurationSource corsConfigurationSource() { CorsConfiguration configuration = new CorsConfiguration(); configuration.setAllowedOrigins(Arrays.asList("*")); configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS")); configuration.setAllowedHeaders(Arrays.asList("Content-Type", "Authorization", "X-Requested-With")); UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(); source.registerCorsConfiguration("/**", configuration); return source; } } ``` 这样配置后，Spring Security将允许来自任何源的跨域请求。 3. 使用代理：在开发环境下，你可以在Vue的配置文件中设置代理，将前端请求转发到后端服务，从而避免浏览器的CORS限制。在`vue.config.js`文件中添加以下代码： ```javascript module.exports = { devServer: { proxy: { '/api': { target: 'http://127.0.0.1:8090', // 后端服务地址 changeOrigin: true, pathRewrite: { '^/api': '' } } } } } ``` 然后，在前端代码中使用`/api`作为请求的基础路径，例如：`axios.post('/api/user/admin/register', data)`。 这些方法中的任何一种都可以帮助你解决CORS问题。你可以根据你的具体情况选择适合的方法。