commit 4bfe4519ad2dfd6e875b9eb43a62c44e3553e9f4
Author: 李光春 <gc@liguangchun.cn>
Date:   Fri May 28 22:53:43 2021 +0800

    GoLibrary

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..f86fc9d9
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.env
+.git
+.svn
+.idea
+.vscode
+*.log
+git.sh
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 00000000..1dc431bc
--- /dev/null
+++ b/README.md
@@ -0,0 +1,15 @@
+<img align="right" width="100" src="https://kodo-cdn.dtapp.net/04/999e9f2f06d396968eacc10ce9bc8a.png" alt="www.dtapp.net"/>
+
+<h1 align="left"><a href="https://www.dtapp.net/">Golang扩展包</a></h1>
+
+📦 Golang扩展包
+
+### 安装
+```text
+go get gitee.com/dtapps/GoLibrary
+```
+
+### 安装
+```text
+go get github.com/dtapps/GoLibrary
+```
diff --git a/helper/aes/aes.go b/helper/aes/aes.go
new file mode 100644
index 00000000..492c4e1e
--- /dev/null
+++ b/helper/aes/aes.go
@@ -0,0 +1,57 @@
+package aes
+
+import (
+	"bytes"
+	"crypto/aes"
+	"crypto/cipher"
+	"encoding/base64"
+)
+
+// Encrypt 加密 aes_128_cbc
+func Encrypt(encryptStr string, key []byte, iv string) (string, error) {
+	encryptBytes := []byte(encryptStr)
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+
+	blockSize := block.BlockSize()
+	encryptBytes = pkcs5Padding(encryptBytes, blockSize)
+
+	blockMode := cipher.NewCBCEncrypter(block, []byte(iv))
+	encrypted := make([]byte, len(encryptBytes))
+	blockMode.CryptBlocks(encrypted, encryptBytes)
+	return base64.URLEncoding.EncodeToString(encrypted), nil
+}
+
+// Decrypt 解密
+func Decrypt(decryptStr string, key []byte, iv string) (string, error) {
+	decryptBytes, err := base64.URLEncoding.DecodeString(decryptStr)
+	if err != nil {
+		return "", err
+	}
+
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		return "", err
+	}
+
+	blockMode := cipher.NewCBCDecrypter(block, []byte(iv))
+	decrypted := make([]byte, len(decryptBytes))
+
+	blockMode.CryptBlocks(decrypted, decryptBytes)
+	decrypted = pkcs5UnPadding(decrypted)
+	return string(decrypted), nil
+}
+
+func pkcs5Padding(cipherText []byte, blockSize int) []byte {
+	padding := blockSize - len(cipherText)%blockSize
+	padText := bytes.Repeat([]byte{byte(padding)}, padding)
+	return append(cipherText, padText...)
+}
+
+func pkcs5UnPadding(decrypted []byte) []byte {
+	length := len(decrypted)
+	unPadding := int(decrypted[length-1])
+	return decrypted[:(length - unPadding)]
+}
diff --git a/helper/decimal/decimal.go b/helper/decimal/decimal.go
new file mode 100644
index 00000000..46fa5cf4
--- /dev/null
+++ b/helper/decimal/decimal.go
@@ -0,0 +1,11 @@
+package decimal
+
+import (
+	"fmt"
+	"strconv"
+)
+
+func Decimal(value float64) float64 {
+	value, _ = strconv.ParseFloat(fmt.Sprintf("%.2f", value), 64)
+	return value
+}
diff --git a/helper/json/json.go b/helper/json/json.go
new file mode 100644
index 00000000..86515469
--- /dev/null
+++ b/helper/json/json.go
@@ -0,0 +1,11 @@
+package json
+
+import "encoding/json"
+
+func Encode(v interface{}) (string, error) {
+	bytes, err := json.Marshal(v)
+	if err != nil {
+		return "", err
+	}
+	return string(bytes), nil
+}
diff --git a/helper/mail/mail.go b/helper/mail/mail.go
new file mode 100644
index 00000000..b89f0943
--- /dev/null
+++ b/helper/mail/mail.go
@@ -0,0 +1,43 @@
+package mail
+
+import (
+	"fmt"
+	"gopkg.in/gomail.v2"
+	"strings"
+)
+
+type Options struct {
+	MailHost string
+	MailPort int
+	MailUser string // 发件人
+	MailPass string // 发件人密码
+	MailTo   string // 收件人 多个用,分割
+	Subject  string // 邮件主题
+	Body     string // 邮件内容
+}
+
+func Send(o *Options) error {
+
+	m := gomail.NewMessage()
+
+	//设置发件人
+	m.SetHeader("From", o.MailUser)
+
+	//设置发送给多个用户
+	mailArrTo := strings.Split(o.MailTo, ",")
+	m.SetHeader("To", mailArrTo...)
+
+	//设置邮件主题
+	m.SetHeader("Subject", o.Subject)
+
+	//设置邮件正文
+	m.SetBody("text/html", o.Body)
+
+	d := gomail.NewDialer(o.MailHost, o.MailPort, o.MailUser, o.MailPass)
+
+	err := d.DialAndSend(m)
+	if err != nil {
+		fmt.Println(err)
+	}
+	return err
+}
diff --git a/helper/md5/md5.go b/helper/md5/md5.go
new file mode 100644
index 00000000..82f9d70b
--- /dev/null
+++ b/helper/md5/md5.go
@@ -0,0 +1,12 @@
+package md5
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+)
+
+func MD5(str string) string {
+	s := md5.New()
+	s.Write([]byte(str))
+	return hex.EncodeToString(s.Sum(nil))
+}
diff --git a/helper/rsa/rsa.go b/helper/rsa/rsa.go
new file mode 100644
index 00000000..891be13f
--- /dev/null
+++ b/helper/rsa/rsa.go
@@ -0,0 +1,77 @@
+package rsa
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"encoding/base64"
+	"encoding/pem"
+	"os"
+)
+
+// PublicEncrypt 公钥加密
+func PublicEncrypt(encryptStr string, path string) (string, error) {
+	// 打开文件
+	file, err := os.Open(path)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	// 读取文件内容
+	info, _ := file.Stat()
+	buf := make([]byte, info.Size())
+	file.Read(buf)
+
+	// pem 解码
+	block, _ := pem.Decode(buf)
+
+	// x509 解码
+	publicKeyInterface, err := x509.ParsePKIXPublicKey(block.Bytes)
+	if err != nil {
+		return "", err
+	}
+
+	// 类型断言
+	publicKey := publicKeyInterface.(*rsa.PublicKey)
+
+	//对明文进行加密
+	encryptedStr, err := rsa.EncryptPKCS1v15(rand.Reader, publicKey, []byte(encryptStr))
+	if err != nil {
+		return "", err
+	}
+
+	//返回密文
+	return base64.URLEncoding.EncodeToString(encryptedStr), nil
+}
+
+// PrivateDecrypt 私钥解密
+func PrivateDecrypt(decryptStr string, path string) (string, error) {
+	// 打开文件
+	file, err := os.Open(path)
+	if err != nil {
+		return "", err
+	}
+	defer file.Close()
+
+	// 获取文件内容
+	info, _ := file.Stat()
+	buf := make([]byte, info.Size())
+	file.Read(buf)
+
+	// pem 解码
+	block, _ := pem.Decode(buf)
+
+	// X509 解码
+	privateKey, err := x509.ParsePKCS1PrivateKey(block.Bytes)
+	if err != nil {
+		return "", err
+	}
+	decryptBytes, err := base64.URLEncoding.DecodeString(decryptStr)
+
+	//对密文进行解密
+	decrypted, _ := rsa.DecryptPKCS1v15(rand.Reader, privateKey, decryptBytes)
+
+	//返回明文
+	return string(decrypted), nil
+}
diff --git a/helper/time/time.go b/helper/time/time.go
new file mode 100644
index 00000000..eae49027
--- /dev/null
+++ b/helper/time/time.go
@@ -0,0 +1,28 @@
+package time
+
+import "time"
+
+// GetCurrentDate 获取当前的时间 - 字符串
+func GetCurrentDate() string {
+	return time.Now().Format("2006/01/02 15:04:05")
+}
+
+// GetCurrentUnix 获取当前的时间 - Unix时间戳
+func GetCurrentUnix() int64 {
+	return time.Now().Unix()
+}
+
+// GetCurrentMilliUnix 获取当前的时间 - 毫秒级时间戳
+func GetCurrentMilliUnix() int64 {
+	return time.Now().UnixNano() / 1000000
+}
+
+// GetCurrentNanoUnix 获取当前的时间 - 纳秒级时间戳
+func GetCurrentNanoUnix() int64 {
+	return time.Now().UnixNano()
+}
+
+// GetCurrentWjDate 获取当前的时间 - 字符串 - 没有间隔
+func GetCurrentWjDate() string {
+	return time.Now().Format("20060102")
+}
diff --git a/helper/uuid/uuid.go b/helper/uuid/uuid.go
new file mode 100644
index 00000000..083faae6
--- /dev/null
+++ b/helper/uuid/uuid.go
@@ -0,0 +1,8 @@
+package uuid
+
+import "github.com/google/uuid"
+
+func GenUUID() string {
+	u, _ := uuid.NewRandom()
+	return u.String()
+}