技術標籤：javafilter過濾器java

後端解決跨域問題

實現WebMvcConfigurer

@Configuration
@SuppressWarnings("SpringJavaAutowiredFieldsWarningInspection")
public class AppConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**"
 
)  
                .allowedOrigins("http://www.hhh.com")  // 可跨域的域名
                .allowCredentials(true)
                .allowedMethods("*")  
                .allowedHeaders("*"); 
    }
}

使用Filter過濾器來過濾服務請求

@WebFilter
public class CorsFilter implements Filter {  

    @Override
 

    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {  
        HttpServletResponse response = (HttpServletResponse) res;  
        response.setHeader("Access-Control-Allow-Origin", "*");  
        response.setHeader
 
("Access-Control-Allow-Methods", "*");  
        response.setHeader("Access-Control-Max-Age", "3600");  
        response.setHeader("Access-Control-Allow-Headers", "*");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        chain.doFilter(req, res);  
    }  
}