Vue+Vite+Axios项目多环境以及部署前后端跨域

# 开发时加载

// 此处为开发时接口
VITE_API_URL = 'http://localhost:8080/api'

# 发布时加载

// 生产时接口
VITE_API_URL = 'http://xxxxxxxxxxx/api'  线上后端地址

const myAxios = axios.create({
    //识别环境
    baseURL: import.meta.env.VITE_API_URL as any,
    timeout: 5000,
    headers: { 'Content-Type': 'application/json;charset=UTF-8' },
    // @ts-ignore
    //跨域
    changeOrigin: true
});

"scripts": {
    "dev": "vite",
    "build": "vite build --mode production",
    "preview": "vite preview"
  },

#项目名称，此处是spring boot 2.5版本之后的写法，之前的写法不能识别
spring:
  config:
    activate:
      on-profile:
        prod
  application:
    name: guanlixitong
    #数据库配置
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    username: dazi
    password: 123456
    url: jdbc:mysql://localhost:3306/dazi
  #sesson 失效时间 86400秒
  session:
    timeout: 86400  
    store-type: redis

java -jar ./{项目打包之后的 jar 包名称，比如maven打包之后target里的 jar 包} --spring.profiles.active=prod

INFO 14040 --- [           main] c.p.d.UserCenterBackendApplication       : The following 1 profile is active: "prod"
INFO 14040 --- [           main] o.a.catalina.core.AprLifecycleListener   : APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true], UDS [true].   
INFO 14040 --- [           main] o.a.catalina.core.AprLifecycleListener   : APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
INFO 14040 --- [           main] o.a.catalina.core.AprLifecycleListener   : OpenSSL successfully initialized [OpenSSL 1.1.1v  1 Aug 2023]
INFO 14040 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]

#跨域配置
location ^~ /api/ {
    proxy_pass http://127.0.0.1:8080;   #反向代理配置
    add_header 'Access-Control-Allow-Origin' $http_origin; #预检查请求也需要这行
    add_header 'Access-Control-Allow-Credentials' 'true';
    add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
    add_header Access-Control-Allow-Headers '*';
	  if ($request_method = 'OPTIONS'){
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Origin' $http_origin;
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
        add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range';
        add_header 'Access-Control-Max-Age' 1728000;
        add_header 'Content-Type' 'text/plain; charset=utf-8';
        add_header 'Content-Length' 0;
        return 204;
    }
}

@CrossOringin(origins = {允许跨域的地址}, methods = {可以跨域的请求方式}, allowCredentials = "true")

//新建config目录，新建在该目录下
@Configuration
public class WebMvcConfg implements WebMvcConfigurer {
 
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        //设置允许跨域的路径
        registry.addMapping("/**")
                //设置允许跨域请求的域名
                //当**Credentials为true时，**Origin不能为星号，需为具体的ip地址【如果接口不带cookie,ip无需设成具体ip】
                .allowedOrigins("http://localhost:9527", "http://127.0.0.1:9527", "http://127.0.0.1:8082", "http://127.0.0.1:8083")
                //是否允许证书 不再默认开启
                .allowCredentials(true)
                .allowedHeaders(CorsConfiguration.ALL)
                //设置允许的方法
                .allowedMethods(CorsConfiguration.ALL)
                //跨域允许时间
                .maxAge(3600);
    }
}

二选一即可
---------------------------------------------------------------
//Spring 中文网
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 WebMvcConfiguration implements WebMvcConfigurer{
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")                  // 允许跨域请求的path，支持路径通配符，如：/api/**
            .allowedOrigins("*")                    // 允许发起请求的源
            .allowedHeaders("*")                    // 允许客户端的提交的 Header，通配符 * 可能有浏览器兼容问题
            .allowedMethods("GET")                  // 允许客户端使用的请求方法
            .allowCredentials(false)                // 不允许携带凭证
            .exposedHeaders("X-Auth-Token, X-Foo")  // 允许额外访问的 Response Header
            .maxAge(3600)                           // 预检缓存一个小时
            ;
    }
}

import java.time.Duration;

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.http.HttpHeaders;
import org.springframework.util.StringUtils;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class WebMvcConfiguration implements WebMvcConfigurer{

    // 通过 FilterRegistrationBean 注册 CorsFilter
    @Bean
    public FilterRegistrationBean<CorsFilter> corsFilter() {
        
        // 跨域 Filter
        CorsFilter corsFilter = new CorsFilter(request -> {
            
            // 请求源
            String origin = request.getHeader(HttpHeaders.ORIGIN);
            
            if (!StringUtils.hasText(origin)) {
                return null; // 非跨域请求
            }
            
            // 针对每个请求，编程式设置跨域
            CorsConfiguration config = new CorsConfiguration();
            
            // 允许发起跨域请求的源，直接取 Origin header 值，不论源是哪儿，服务器都接受
            config.addAllowedOrigin(origin);
            
            
            // 允许客户端的请求的所有 Header
            String headers = request.getHeader(HttpHeaders.ACCESS_CONTROL_REQUEST_HEADERS);
            if (StringUtils.hasText(headers)) {
                config.setAllowedHeaders(Stream.of(headers.split(",")).map(String::trim).distinct().toList());
            }
            
            // 允许客户端的所有请求方法
            config.addAllowedMethod(request.getHeader(HttpHeaders.ACCESS_CONTROL_REQUEST_METHOD));
            // 允许读取所有 Header
            // 注意，"*" 通配符，可能在其他低版本浏览中不兼容。
            config.addExposedHeader("*");
            // 缓存30分钟
            config.setMaxAge(Duration.ofMinutes(30));
            // 允许携带凭证
            config.setAllowCredentials(true);
            return config;
        });
        
        FilterRegistrationBean<CorsFilter> bean = new FilterRegistrationBean<>(corsFilter);
        bean.addUrlPatterns("/*");                  // Filter 拦截路径
        bean.setOrder(Ordered.LOWEST_PRECEDENCE);   // 保证最先执行
        return bean;
    }
}

//报错信息
The 'Access-Control-Allow-Origin' header contains multiple values'*, *', but only one is allowed.