字符转码

    encode(val) {
                return encodeURIComponent(val)
                    .replace(/%40/g, ‘@‘)
                    .replace(/%3A/gi, ‘:‘)
                    .replace(/$24/g, ‘$‘)
                    .replace(/%2C/gi, ‘,‘)
                    .replace(/%20/g, ‘+‘) //空格变加号
                    .replace(/%5B/gi, ‘[‘)
                    .replace(/%5D/gi, ‘]‘)
                    .replace(/%2F/gi, ‘/‘)
                    .replace(/%3F/gi, ‘?‘)
                    .replace(/%3D/gi, ‘=‘)
            },