Springboot设置跨域的三种方式

方式一(精细配置)

在需要跨域的整个Controller或者单个方法上添加@CrossOrigin注解

方式二(全局配置)

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

方式三(通过filter)

 @Component
 @WebFilter(urlPatterns = "/*", filterName = "authFilter") //这里的“/*” 表示的是需要拦截的请求路径
 public class PassHttpFilter implements Filter {
     @Override
     public void init(FilterConfig filterConfig) throws ServletException { }
     @Override
     public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
         HttpServletResponse httpResponse = (HttpServletResponse)servletResponse;
         httpResponse.setHeader("Access-Control-Allow-Headers","Origin, X-Requested-With, Content-Type, Accept");
         httpResponse.setHeader("Access-Control-Allow-Credentials", "true");
         httpResponse.addHeader("Access-Control-Allow-Origin", "http://127.0.0.1:8080");
         filterChain.doFilter(servletRequest, httpResponse);
     }
     @Override
     public void destroy() { }
 }