HttpServletResponse response = (HttpServletResponse) res;
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
chain.doFilter(req, res);
}
@Override
public void init(FilterConfig arg0) throws ServletException {
}
}
在web.xml中需要添加如下配置：
cors
com.ssm.web.filter.SimpleCORSFilter
cors
/*
为单个方法提供跨域访问，直接添加请求头：
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
==========================================================================
使用HttpClinet转发进行转发(简单的例子 不推荐使用这种方式)
try {
HttpClient client = HttpClients.createDefault(); //client对象
HttpGet get = new HttpGet("http://localhost:8080/test"); //创建get请求
CloseableHttpResponse response = httpClient.execute(get); //执行get请求
String mes = EntityUtils.toString(response.getEntity()); //将返回体的信息转换为字符串
System.out.println(mes);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
===============================================================================
在SpringBoot2.0 上的跨域 用以下代码配置 即可完美解决你的前后端跨域请求问题
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
/**
-
实现基本的跨域请求
-
@author linhongcun
*/
@Configuration
public class CorsConfig {
@Bean
public CorsFilter corsFilter() {
final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
final CorsConfiguration corsConfiguration = new CorsConfiguration();
/是否允许请求带有验证信息/
corsConfiguration.setAllowCredentials(true);
/允许访问的客户端域名/
corsConfiguration.addAllowedOrigin("*");
/允许服务端访问的客户端请求头/
corsConfiguration.addAllowedHeader("*");
/允许访问的方法名,GET POST等/
corsConfiguration.addAllowedMethod("*");
urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);
return new CorsFilter(urlBasedCorsConfigurationSource);
}
}
===============================================================================
服务网关(zuul)又称路由中心，用来统一访问所有api接口，维护服务。
Spring Cloud Zuul通过与Spring Cloud Eureka的整合，实现了对服务实例的自动化维护，所以在使用服务路由配置的时候，我们不需要向传统路由配置方式那样去指定具体的服务实例地址，只需要通过Ant模式配置文件参数即可
==========================================================================
现在有两个网站想互相访问接口 在http://a.a.com:81/A中想访问 http://b.b.com:81/B 那么进行如下配置即可
然后通过访问 www.my.com/A 里面即可访问 www.my.com/B
s
erver {
listen 80;
server_name www.my.com;
location /A {
proxy_pass a.a.com:81/A;
index index.html index.htm;
}
location /B {
proxy_pass b.b.com:81/B;
index index.html index.htm;
}
