SpringBoot解决跨域的5种方式小结

@Configuration
public class GlobalCorsConfig {

    @Bean
    public CorsFilter corsFilter() {
        //1. 添加 CORS配置信息
        CorsConfiguration config = new CorsConfiguration();
        //放行哪些原始域
        config.addAllowedOrigin("*");
        //是否发送 Cookie
        config.setAllowCredentials(true);
        //放行哪些请求方式
        config.addAllowedMethod("*");
        //放行哪些原始请求头部信息
        config.addAllowedHeader("*");
        //暴露哪些头部信息
        config.addExposedHeader("*");
        //2. 添加映射路径
        UrlBasedCorsConfigurationSource corsConfigurationSource = new UrlBasedCorsConfigurationSource();
        corsConfigurationSource.reGISterCorsConfiguration("/**",config);
        //3. 返回新的CorsFilter
        return new CorsFilter(corsConfigurationSource);
    }
}

@Configuration
public class CorsConfig implements WebMvcConfigurer {

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                //是否发送Cookie
                .allowCredentials(true)
                //放行哪些原始域
                .allowedOrigins("*")
                .allowedMethods(new String[]{"GET", "POST", "PUT", "DELETE"})
                .allowedHeaders("*")
                .exposedHeaders("*");
    }
}

@RestController
@CrossOrigin(origins = "*")
public class HelloController {

    @RequestMapping("/hello")
    public String hello() {
        return "hello world";
    }
}

  @RequestMapping("/hello")
  @CrossOrigin(origins = "*")
   //@CrossOrigin(value = "Http://localhost:8081") //指定具体ip允许跨域
  public String hello() {
        return "hello world";
  }

@RequestMapping("/index")
public String index(HttpServletResponse response) {

    response.addHeader("Access-Allow-Control-Origin","*");
    return "index";
}

package cn.wideth.aop;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;

@Component
public class MyCorsFilter implements Filter {

  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", "POST, GET, OPTIONS, DELETE");
    response.setHeader("Access-Control-Max-Age", "3600");
    response.setHeader("Access-Control-Allow-Headers", "x-requested-with,content-type");
    chain.doFilter(req, res);
    
  }
  
  public void init(FilterConfig filterConfig) {}
  public void destroy() {}
}