Vue调试时跨域问题解决

1. 通过前端proxyTable处理，经试验，添加后，后端可以不用额外处理

proxyTable: {
      //可以设置多个，对应到不同的后端服务，通过调用时增加前缀选用不通代理
      '/api': {
        // 测试环境
        target: 'http://127.0.0.1:8080/',  // 接口域名,也就是要代理到的后端服务
        changeOrigin: true,  //是否跨域
        pathRewrite: {
            '^/api': ''   //需要rewrite重写的, 如果前缀是额外增加的，需要重写去掉
        }
      }
}

2. 后端拦截器/过滤器处理（JAVA）

String curOrigin = request.getHeader("Origin");

response.addHeader("Access-Control-Allow-Origin", curOrigin);

response.addHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Allow-Methods", "POST, GET, PUT, OPTIONS, DELETE");
response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Connection, User-Agent, Cookie, Authorization");

 // 跨域会首先发送一次OPTIONS请求，放过
if("OPTIONS".equals(request.getMethod()))
{
   return false;
}

3.通过nginx转发

location /api {
        add_header 'Access-Control-Allow-Origin' $http_origin;
        add_header 'Access-Control-Allow-Credentials' 'true';
        add_header 'Access-Control-Allow-Headers' $http_access_control_request_headers;
        add_header 'Access-Control-Allow-Methods' *;

        proxy_pass http://your ip:8888/api;
    }