java 跨域请求 - leileigwl

跨域请求#

同源策略：协议、域名、端口 3 个都相同就是同源

Spring Boot 项目中解决跨域的 3 种方案

1、在目标方法上添加 @CrossOrigin 注解#

1
@GetMapping("/list")
2
@CrossOrigin
3
public List<String> list(){
4
    List<String> list = Arrays.asList("Java","C++","Go");
5
    return list;
6
}

2、添加 CORS 过滤器#

1
@Configuration
2
public class CorsConfig {
3

4
    @Bean
5
    public CorsFilter corsFilter(){
6
        CorsConfiguration corsConfiguration = new CorsConfiguration();
7
        corsConfiguration.addAllowedOrigin("*");
8
        corsConfiguration.addAllowedHeader("*");
9
        corsConfiguration.addAllowedMethod("*");
10
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
11
        source.registerCorsConfiguration("/**", corsConfiguration);
12
        return new CorsFilter(source);
13
    }
14

15
}

3、实现 WebMvcConfigurer 接口，重写 addCorsMappings 方法#

1
@Configuration
2
public class CorsConfiguration implements WebMvcConfigurer {
3
    @Override
4
    public void addCorsMappings(CorsRegistry registry) {
5
        registry.addMapping("/**")
6
                .allowedOriginPatterns("*")
7
                .allowedMethods("GET","POST","PUT","DELETE","HEAD","OPTIONS")
8
                .allowCredentials(true)
9
                .maxAge(3600)
10
                .allowedHeaders("*");
11
    }
12
}