SpringBoot中实现跨域的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 com.mesnac.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() {}
}

<!-- 跨域访问 START-->
<filter>
 <filter-name>CorsFilter</filter-name>
 <filter-class>com.mesnac.aop.MyCorsFilter</filter-class>
</filter>
<filter-mapping>
 <filter-name>CorsFilter</filter-name>
 <url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 跨域访问 END -->