Spring-Boot允许跨域请求

1、项目下新建一个config包 专门用于放置配置文件（但是这只是最佳目录、实际上spring boot对与文件结构是没有要求的、只用注解来判断每个类的作用）

2、新建一个文件类CorsConfig，编写以下代码：

package com.xhwl.erp.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;

@Configuration

public class CorsConfig {

private CorsConfiguration buildConfig() {

CorsConfiguration corsConfiguration = new CorsConfiguration();

corsConfiguration.addAllowedOrigin(“*”); // 1

corsConfiguration.addAllowedHeader(“*”); // 2

corsConfiguration.addAllowedMethod(“*”); // 3

return corsConfiguration;

}

@Bean
public CorsFilter corsFilter() {
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
source.registerCorsConfiguration("/**", buildConfig()); // 4
return new CorsFilter(source);
}

}