Spring Boot如何解决前端的Access-Control-Allow-Origin跨域问题

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        当我们在做前后端分离的开发时，在使用fetch交换数据的时候，提示Access-Control-Allow-Origin跨域问题，解决方案跟客户端没关系，修改的是服务端。

一、在过滤器中设置响应头：

@WebFilter(filterName = "CorsFilter ")
public class CorsFilter implements Filter {@Overridepublic void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {HttpServletResponse response = (HttpServletResponse) res;HttpServletRequest reqs = (HttpServletRequest) req;// response.setHeader("Access-Control-Allow-Origin",reqs.getHeader("Origin"));response.setHeader("Access-Control-Allow-Origin","*");response.setHeader("Access-Control-Allow-Credentials", "true");response.setHeader("Access-Control-Allow-Methods", "POST, GET, PATCH, DELETE, PUT");response.setHeader("Access-Control-Max-Age", "3600");response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");chain.doFilter(req, res);}@Overridepublic void init(FilterConfig filterConfig) {}@Overridepublic void destroy() {}}

二、在spring boot 服务中心添加一个配置文件：

@Configuration
public class CorsConfig extends WebMvcConfigurerAdapter {@Overridepublic void addCorsMappings(CorsRegistry registry) {registry.addMapping("/**").allowedOrigins("*").allowedMethods("GET", "HEAD", "POST","PUT", "DELETE", "OPTIONS").allowCredentials(true).maxAge(3600);}
}

 

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