SpringBoot解决接口跨域问题

在Spring Boot 2.X应用程序中可以使用注解@CrossOrigin，也可以通过使用WebMvcConfigurer对象来定义全局CORS配置。

1. @CrossOrigin注解示例代码

 

接口类：HelloController

@RestController
public class HelloController {

    @CrossOrigin
    @RequestMapping("/hello")
    public String HelloSpring (){
        return "解决跨域了";
    }
}

　　

WebMvcConfigurer对象示例代码

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class MyConfiguration {
    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurer() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/*")
                          .allowedOrigins("*")
                          .allowCredentials(true)
                          .allowedMethods("GET", "POST", "DELETE", "PUT","PATCH")
                          .maxAge(3600);
            }
        };
    }
}