为什么80%的码农都做不了架构师？>>> 
1
在做支付的时候会涉及到 url参数编码和解码，然后转换成自己想要的格式
app_id=2016073100129537&biz_content=%7B%22body%22%3A%22body%22%2C%22subject%22%3A%22%E5%95%86%E5%93%81%E6%A0%87%E9%A2%98%22%2C%22out_trade_no%22%3A%2201010101%22%2C%22timeout_express%22%3A%22%22%2C%22total_amount%22%3A%22100.00%22%2C%22seller_id%22%3A%22%22%2C%22product_code%22%3A%22p_1010101%22%7D&charset=utf-8&format=JSON&method=alipay.trade.app.pay¬ify_url=http%3A%2F%2F203.86.24.181%3A3000%2Falipay&sign=i0lEkNZjw%2FaBafm1HGH7wQ2KW5RWE7UUAmymwOZvbmHxofpIcGZnBBkOd%2BZolAb2XjjcPxJQ%2FrRx0Ts%2Bs58%2FpCsHR%2BOZ8jsUFX6OQweqeq4uNnugBc0bBkZBosQxLazjsn9JVnqe0IW%2BxtXzju7g7kCcXZG9l8IEgG%2BanSGpYu0%2B6Dr30f7UoZPcT3VCw%2FBNCNyh8BS0G7j%2FcCariZ3bZVLu2kUu4aHqhfzG58b2LnhAUkuZdxr6vsNZmbuC2G74yH1W9tOzBQPgKhDFagi0L3WAdL65r1wiw7RIpHVp8n41hY5YkGr%2FVbtMQoHfEtOD2kzu9%2FL8Qb2ICoBq4C9lVw%3D%3D&sign_type=RSA2×tamp=2017-11-10+17%3A54%3A34&version=1.0
map[sign:[i0lEkNZjw/aBafm1HGH7wQ2KW5RWE7UUAmymwOZvbmHxofpIcGZnBBkOd+ZolAb2XjjcPxJQ/rRx0Ts+s58/pCsHR+OZ8jsUFX6OQweqeq4uNnugBc0bBkZBosQxLazjsn9JVnqe0IW+xtXzju7g7kCcXZG9l8IEgG+anSGpYu0+6Dr30f7UoZPcT3VCw/BNCNyh8BS0G7j/cCariZ3bZVLu2kUu4aHqhfzG58b2LnhAUkuZdxr6vsNZmbuC2G74yH1W9tOzBQPgKhDFagi0L3WAdL65r1wiw7RIpHVp8n41hY5YkGr/VbtMQoHfEtOD2kzu9/L8Qb2ICoBq4C9lVw==] app_id:[2016073100129537] format:[JSON] notify_url:[http://203.86.24.181:3000/alipay] sign_type:[RSA2] timestamp:[2017-11-10 17:54:34] version:[1.0] biz_content:[{"body":"body","subject":"商品标题","out_trade_no":"01010101","timeout_express":"","total_amount":"100.00","seller_id":"","product_code":"p_1010101"}] charset:[utf-8] method:[alipay.trade.app.pay]]
使用
http 请求的时候将url传递的参数编码 变为 以&连接的字符串
//构造参数
var p = url.Values{}
p.Add("app_id", this.appId)
p.Add("method", param.APIName())
//编码
var buf io.Reader
buf = strings.NewReader(p.Encode())
//http 发送请求
req, err := http.NewRequest(method, this.apiDomain, buf)
当需要将参数解码成url.Values{}类型，也就是 map[string][]string，使用
//解析参数
u, err := url.ParseQuery(result)
fmt.Println(u, err)
2
golang中类似java的URLEncode函数的使用
Go语言的net/url包中实现了类似java URLEncoder和URLDecoder的函数，它们是
QueryEscape：类似URLEncoder
QueryUnescape：类似URLDecoder
使用例子如下：
首先要引入net/url包
import (
"fmt"
"net/url"
)
测试代码：
urltest := "http://www.baidu.com/s?wd=自由度"
fmt.Println(urltest)
encodeurl:= url.QueryEscape(urltest)
fmt.Println(encodeurl)
decodeurl,err := url.QueryUnescape(encodeurl)
if err != nil {
fmt.Println(err)
}
fmt.Println(decodeurl)
输出结果：
http://www.baidu.com/s?wd=自由度
http%3A%2F%2Fwww.baidu.com%2Fs%3Fwd%3D%E8%87%AA%E7%94%B1%E5%BA%A6
http://www.baidu.com/s?wd=自由度