SpringBoot解决cors跨域问题

1.使用@CrossOrigin注解实现
 (1).对单个接口配置CORS

@CrossOrigin(origins = {"*"})
@PostMapping("/hello")
@ResponseBody
public ResultVO hello() {
    return new ResultVO(1,"成功");
}

 (2).对某个Controller下的所有接口配置CORS

@CrossOrigin
@Controller
public class HelloController {

}

2.配置全局的CORS

（1）添加配置类

package com.yltx.api.config;

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;

/**
 * @Author: Hujh
 * @Date: 2019/5/9 15:49
 * @Description: Cors跨域配置
 */
@Configuration
public class CorsConfig {
    @Bean
    public CorsFilter corsFilter() {
        final UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
        final CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.setAllowCredentials(true);
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        urlBasedCorsConfigurationSource.registerCorsConfiguration("/**", corsConfiguration);
        return new CorsFilter(urlBasedCorsConfigurationSource);
    }
}

（2）添加配置类

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

/**
 * @Author: Hujh
 * @Date: 2019/5/9 16:18
 * @Description:
 */
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE")
                .maxAge(3600)
                .allowCredentials(true);
    }
}

注：添加配置类方法取一即可.