...

mongodump --host 127.0.0.1 --port 37017 --username username  --db db --collection collection --out /data/collection_2017_06_08


mongorestore --host 127.0.0.1 --port 37017  /data/collection_2017_06_08

$.ajax({
    type: "post",
    async: false, 
    url: '/api/v1/demo.json',
    data: {a:1,b:1,c:1},
    dataType: "json", 
    success: function (rsp) {
        alert('success');
    }
});

# 整站下载
wget -p -np -k  http://www.jd.com	

# 从文件获取下载url
wget -p -np -k  -i input_url.txt

server {
    listen       80;
    server_name  localhost;

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

    location / {
       proxy_pass http://127.0.0.1:8080;
       index index.html index.htm;
    }

    location /v1 {
        #deny all;
        #allow 127.0.0.1;
        proxy_pass http://127.0.0.1:9090;
        index  index.php index.html index.htm;
    }
}

import com.alibaba.fastjson.TypeReference;

List list = JSON.parseObject("...", new TypeReference>() {});

git config --global user.name "username"
git config --global user.email "email@email.com"


mkdir pc-battery2
cd pc-battery2
git init
touch README.md
git add README.md
git commit -m "first commit"
git remote add origin https://github/xxx.git
git branch --set-upstream-to=origin/master
git pull --allow-unrelated-histories
git push

GRANT ALL PRIVILEGES ON *.* TO root@"%" identified by "123456"; 

alter user 'root'@'localhost' identified by '123456';

#本地转发  remote 9090 to local 9090
ssh -L 9090:remote-secret.com:8080 my-remote-host.com

#远程转发 local 9090 to remote 8080
ssh -R 9090:local-secret.com:8080 my-remote-host.com

#允许外部访问
sshd_config  GatewayPorts:true

#动态转发
ssh -D 9090 my-remote-host.com

if( Pattern.matches(".*@.*", text) ){
    return "match!";
}

-Dsun.jnu.encoding=utf-8  -Dfile.encoding=utf-8

character-set-server=utf8mb4s