1、首先判断产线项目是否放在域名根目录下

在router/index.js文件中，添加history模式
如果项目不在根目录下，比如产线项目根目录为
http://www.baidu.com/project-name/

export default new Router({
 mode: 'history',
 base: '/projectname/', //如果项目根目录不为域名，则添加该行
 routes: [{}]
})

2、修改config/index.js文件

build: {
 // Paths
 publicPath: '/projectname/', //添加根目录，如果域名为根目录，则为 '/'
}

保证build后index.html引入的js、css、img等路径是正确的
index.html

<!DOCTYPE html>
<html lang=en>

<head>
    <meta charset=utf-8>
    <meta http-equiv=X-UA-Compatible content="IE=edge">
    <meta name=viewport content="width=device-width,initial-scale=1">
    <meta name=x5-orientation content=portrait>
    <link rel=icon href=/favicon.ico> <title>XX项目</title>
    <link href=/css/app.ffc78a93.css rel=preload as=style>
    <link href=/css/chunk-vendors.1f410e35.css rel=preload as=style>
    <link href=/js/app.77b1be3b.js rel=preload as=script>
    <link href=/js/chunk-vendors.c113ff89.js rel=preload as=script>
    <link href=/css/chunk-vendors.1f410e35.css rel=stylesheet>
    <link href=/css/app.ffc78a93.css rel=stylesheet>
</head>

<body><noscript><strong>We're sorry but pain-steward doesn't work properly without JavaScript enabled. Please enable it
            to continue.</strong></noscript>
    <div id=app></div>
    <script src=/js/chunk-vendors.c113ff89.js> </script> <script src=/js/app.77b1be3b.js> </script> </body> </html>

3、后台配置
Vue Router

location /projectname {
  try_files $uri $uri/ /projectname/index.html;
}

后台配置的根目录需要与前台配置的根目录一致(projectname)

vue.config.js

module.exports = {
  publicPath: '/',
  // outputDir: 在npm run build时 生成文件的目录 type:string, default:'dist'
  // outputDir: 'dist',
  // pages:{ type:Object,Default:undfind } 
  devServer: {
    port: 8888, // 端口号
    host: '0.0.0.0',
    https: false, // https:{type:Boolean}
    open: false, //配置自动启动浏览器
    proxy: {
      '/api': {
        target: 'http://localhost:8080/',
        changeOrigin: true,
        pathRewrite: {
          '^/api': ''
        }
      },
    }
  },
  configureWebpack: {
    externals: {
      wx: 'wx'
    }
  },
}

router/index.js

Vue.use(Router)

let option = {
    mode: 'history',
    // base: process.env.BASE_URL,
    routes: [{
        path: '/index',
        component: index,
        meta: {
            title: '',
        }
    }, {
        path: '/register',
        component: register,
        meta: {
            title: '注册',
            rank: 2
        }
    }, {
        path: '/protocol',
        component: protocol,
        meta: {
            title: '协议',
            rank: 4
        }
    }, {
        path: '/set-password',
        component: setPassword,
        meta: {
            title: '设置密码',
            rank: 3
        }
    }, {
        path: '/find-password',
        component: findPassword,
        meta: {
            title: '找回密码',
            rank: 2
        }
    }, {
        path: '/login',
        component: login,
        meta: {
            title: '登录',
            rank: 1
        }
    }]
}

nginx配置

server {
    listen       80;
    server_name  localhost;
    client_max_body_size 20m;

    #charset koi8-r;
    #access_log  /var/log/nginx/log/host.access.log  main;

    location ^~/api/ {
        proxy_pass http://127.0.0.1:8080/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location / {
        root /opt/pain/app/;
        index index.html;
        try_files $uri $uri/ /index.html;
    }

    location @rewrites {
        rewrite ^(.+)$ /app/index.html last;
    }

    #error_page  404              /404.html;

    # redirect server error pages to the static page /50x.html
    #
    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /var/nginx/html;
    }

    # proxy the PHP scripts to Apache listening on 127.0.0.1:80
    #
    #location ~ \.php$ {
    #    proxy_pass   http://127.0.0.1;
    #}

    # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
    #
    #location ~ \.php$ {
    #    root           /var/nginx/html/123.com;
    #    fastcgi_pass   127.0.0.1:9000;
    #    fastcgi_index  index.php;
    #    fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
    #    include        fastcgi_params;
    #}

    # deny access to .htaccess files, if Apache's document root
    # concurs with nginx's one
    #
    #location ~ /\.ht {
    #    deny  all;
    #}
}