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package CommonUtil
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import (
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"bufio"
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"bytes"
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"crypto/md5"
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"encoding/binary"
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"encoding/hex"
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"encoding/json"
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"fmt"
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uuid "github.com/satori/go.uuid"
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"io"
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"log"
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"math/rand"
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"os"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"time"
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"unsafe"
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)
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/**
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功能:获取UUID
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作者:黄海
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时间:2020-02-03
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*/
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func GetUUID() string {
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u2 := strings.ToUpper(uuid.NewV4().String())
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return u2
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}
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/**
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功能:判断是不是合法的日期格式
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作者:黄海
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时间:2020-03-23
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*/
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func IsDate(date string) bool {
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_, err := time.Parse("2006-01-02 15:04:05", date)
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if err != nil {
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return false
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} else {
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return true
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}
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}
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/**
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功能:从一个数据库的查询返回结果中获取指定字段的IDS
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作者:黄海
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时间:2020-02-14
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*/
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func SelectIdsFromMapInterface(list []map[string]interface{}, key string) []string {
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var ids []string
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for i := 0; i < len(list); i++ {
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switch list[i][key].(type) {
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case string:
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ids = append(ids, list[i][key].(string))
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break
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case int64:
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ids = append(ids, strconv.FormatInt(list[i][key].(int64), 10))
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}
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}
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return ids
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}
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/**
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功能:将一个数据库查询返回结果中的某一列,形成字典
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作者:黄海
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时间:2020-02-14
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*/
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func PutSelectResultToMapByField(list []map[string]interface{}, field string) map[string]interface{} {
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_dict := make(map[string]interface{})
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for i, _ := range list {
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record := list[i]
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switch record[field].(type) {
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case int64:
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_dict[strconv.FormatInt(record[field].(int64), 10)] = 1
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default:
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_dict[record[field].(string)] = 1
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}
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}
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return _dict
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}
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/**
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功能:通过字典获取字符串数组
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作者:黄海
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时间:2020-02-14
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*/
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func GetArrayByMap(_dict map[string]interface{}) []string {
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Ids := make([]string, 0, len(_dict))
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for k := range _dict {
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Ids = append(Ids, k) //
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}
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return Ids
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}
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/**
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功能:将数据库返回的查询结果映射成字典,用于扩展字段
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作者:黄海
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时间:2020-02-14
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*/
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func ConvertMapInterfaceToMapByField(list []map[string]interface{}, key string, value string) map[string]string {
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_map := make(map[string]string)
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for i, _ := range list {
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var areaTypeId string
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switch list[i][key].(type) {
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case int64:
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areaTypeId = strconv.FormatInt(list[i][key].(int64), 10)
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default:
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areaTypeId = list[i][key].(string)
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}
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switch list[i][value].(type) {
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case int64:
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_map[areaTypeId] = strconv.FormatInt(list[i][value].(int64), 10)
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default:
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_map[areaTypeId] = list[i][value].(string)
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}
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}
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return _map
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}
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/**
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功能:扩展数据库查询结果集
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作者:黄海
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时间:2020-02-14
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*/
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func ExtendList(list *[]map[string]interface{}, _map map[string]string, key string, value string) {
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for i, _ := range *list {
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sourceRecord := (*list)[i]
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var a string
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switch sourceRecord[key].(type) {
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case int64:
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a = strconv.FormatInt(sourceRecord[key].(int64), 10)
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default:
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a = sourceRecord[key].(string)
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}
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sourceRecord[value] = _map[a]
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}
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}
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/**
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功能:删除字符串多余的空格
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作者:黄海
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时间:2020-01-20
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*/
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func DeleteExtraSpace(s string) string {
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//删除字符串中的多余空格,有多个空格时,仅保留一个空格
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s1 := strings.Replace(s, " ", " ", -1) //替换tab为空格
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regstr := "\\s{2,}" //两个及两个以上空格的正则表达式
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reg, _ := regexp.Compile(regstr) //编译正则表达式
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s2 := make([]byte, len(s1)) //定义字符数组切片
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copy(s2, s1) //将字符串复制到切片
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spcIndex := reg.FindStringIndex(string(s2)) //在字符串中搜索
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for len(spcIndex) > 0 { //找到适配项
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s2 = append(s2[:spcIndex[0]+1], s2[spcIndex[1]:]...) //删除多余空格
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spcIndex = reg.FindStringIndex(string(s2)) //继续在字符串中搜索
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}
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return string(s2)
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}
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//删除字符串中的空白行
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func DeleteBlankString(str string) string {
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var arr = strings.Split(str, "\r\n")
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var resultStr = ""
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for i := 0; i < len(arr); i++ {
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if len(strings.Replace(strings.Replace(arr[i], " ", "", -1), "\t", "", -1)) > 0 {
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resultStr += arr[i] + "\r\n"
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}
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}
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return resultStr
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}
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//删除文件中空白行
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func DeleteBlankFile(srcFilePah string, destFilePath string) error {
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srcFile, err := os.OpenFile(srcFilePah, os.O_RDONLY, 0666)
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defer srcFile.Close()
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if err != nil {
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return err
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}
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srcReader := bufio.NewReader(srcFile)
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destFile, err := os.OpenFile(destFilePath, os.O_WRONLY|os.O_CREATE, 0666)
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defer destFile.Close()
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if err != nil {
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return err
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}
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for {
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str, err := srcReader.ReadString('\n')
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if err != nil {
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if err == io.EOF {
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fmt.Print("The file end is touched.")
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break
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} else {
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return err
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}
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}
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if strings.HasSuffix(str, " \r\n") {
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continue
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}
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if strings.HasPrefix(str, "\r\n") {
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continue
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}
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fmt.Println(len(str))
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fmt.Print(str)
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destFile.WriteString(str)
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}
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return nil
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}
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//如果是小写字母, 则变换为大写字母
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func StrFirstToUpper(str string) string {
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var upperStr string
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vv := []rune(str) // 后文有介绍
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for i := 0; i < len(vv); i++ {
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if i == 0 {
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if vv[i] >= 97 && vv[i] <= 122 { // 后文有介绍
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vv[i] -= 32 // string的码表相差32位
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upperStr += string(vv[i])
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} else {
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fmt.Println("Not begins with lowercase letter,")
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return str
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}
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} else {
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upperStr += string(vv[i])
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}
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}
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return upperStr
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}
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//如果是大写字母, 则变换为小写字母
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func StrFirstToLower(str string) string {
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if len(str) < 1 {
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return ""
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}
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strArry := []rune(str)
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if strArry[0] >= 65 && strArry[0] <= 90 {
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strArry[0] += 32
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}
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return string(strArry)
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}
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/**
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功能:获取蛇形命名的字符串
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作者:黄海
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时间:2020-01-22
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*/
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func GetSnakeCaseStr(str string) string {
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array := strings.Split(str, "_")
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var result string
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for i := 0; i < len(array); i++ {
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result = result + strings.ToUpper(array[i][0:1]) + array[i][1:]
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}
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return result
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}
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const (
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// 可自定义盐值
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TokenSalt = "DsideaL4r5t6y7u"
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)
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func MD5(data []byte) string {
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_md5 := md5.New()
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_md5.Write(data)
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return hex.EncodeToString(_md5.Sum([]byte("")))
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}
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//isSymbol表示有无符号
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func BytesToInt(b []byte, isSymbol bool) (int, error) {
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if isSymbol {
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return BytesToIntS(b)
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}
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return bytesToIntU(b)
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}
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//字节数(大端)组转成int(无符号的)
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func bytesToIntU(b []byte) (int, error) {
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if len(b) == 3 {
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b = append([]byte{0}, b...)
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}
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bytesBuffer := bytes.NewBuffer(b)
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switch len(b) {
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case 1:
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var tmp uint8
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err := binary.Read(bytesBuffer, binary.BigEndian, &tmp)
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return int(tmp), err
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case 2:
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var tmp uint16
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err := binary.Read(bytesBuffer, binary.BigEndian, &tmp)
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return int(tmp), err
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case 4:
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var tmp uint32
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err := binary.Read(bytesBuffer, binary.BigEndian, &tmp)
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return int(tmp), err
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default:
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return 0, fmt.Errorf("%s", "BytesToInt bytes lenth is invaild!")
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}
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}
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//字节数(大端)组转成int(有符号)
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func BytesToIntS(b []byte) (int, error) {
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if len(b) == 3 {
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b = append([]byte{0}, b...)
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}
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bytesBuffer := bytes.NewBuffer(b)
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switch len(b) {
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case 1:
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var tmp int8
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err := binary.Read(bytesBuffer, binary.BigEndian, &tmp)
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return int(tmp), err
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case 2:
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var tmp int16
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err := binary.Read(bytesBuffer, binary.BigEndian, &tmp)
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return int(tmp), err
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case 4:
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var tmp int32
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err := binary.Read(bytesBuffer, binary.BigEndian, &tmp)
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return int(tmp), err
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default:
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return 0, fmt.Errorf("%s", "BytesToInt bytes lenth is invaild!")
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}
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}
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//整形转换成字节
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func IntToBytes(n int, b byte) ([]byte, error) {
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switch b {
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case 1:
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tmp := int8(n)
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bytesBuffer := bytes.NewBuffer([]byte{})
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binary.Write(bytesBuffer, binary.BigEndian, &tmp)
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return bytesBuffer.Bytes(), nil
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case 2:
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tmp := int16(n)
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bytesBuffer := bytes.NewBuffer([]byte{})
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binary.Write(bytesBuffer, binary.BigEndian, &tmp)
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return bytesBuffer.Bytes(), nil
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case 3, 4:
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tmp := int32(n)
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bytesBuffer := bytes.NewBuffer([]byte{})
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binary.Write(bytesBuffer, binary.BigEndian, &tmp)
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return bytesBuffer.Bytes(), nil
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}
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return nil, fmt.Errorf("IntToBytes b param is invaild")
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}
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/**
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功能:生成一个随机盐
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作者: 黄海
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时间:2020-02-18
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*/
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func GetRandomSalt() string {
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return GetRandomString(8)
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}
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//生成随机字符串
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func GetRandomString(l int) string {
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str := "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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bytes := []byte(str)
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var result []byte
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r := rand.New(rand.NewSource(time.Now().UnixNano()))
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for i := 0; i < l; i++ {
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result = append(result, bytes[r.Intn(len(bytes))])
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}
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return string(result)
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}
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/**
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功能:获取当前的时间戳,精确度纳秒
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作者:黄海
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时间:2020-02-18
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*/
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func GetCurrentTimestamp() int64 {
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return time.Now().UnixNano()
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}
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/**
|
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功能:获取当前的时间字符串
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作者:黄海
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时间:2020-02-21
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*/
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func GetCurrentTime() string {
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timeStr := time.Now().Format("2006-01-02 15:04:05")
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|
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//当前时间的字符串,2006-01-02 15:04:05据说是golang的诞生时间,固定写法
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return timeStr
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}
|
|
|
|
|
|
/**
|
|
|
功能:将Json格式的字符串转为map
|
|
|
作者:吴缤
|
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|
日期:2020-02-21
|
|
|
*/
|
|
|
func JsonStrToMap(jsonStr string) (map[string]interface{}, error) {
|
|
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var _map map[string]interface{}
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|
|
err := json.Unmarshal([]byte(jsonStr), &_map)
|
|
|
if err == nil {
|
|
|
if _map["code"] != nil {
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|
var _code = int(_map["code"].(float64))
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|
_map["code"] = _code
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|
|
}
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|
|
return _map, nil
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|
} else {
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return nil, err
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|
|
}
|
|
|
}
|
|
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|
|
|
/*
|
|
|
功能:返回当前GO文件所在的目录
|
|
|
*/
|
|
|
func GetCurrentDirectory() string {
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|
|
directory, _ := os.Getwd()
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|
|
return directory
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|
|
}
|
|
|
/**
|
|
|
功能:返回上一级目录
|
|
|
*/
|
|
|
func GetParentPath(directory string)string{
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|
|
return filepath.Dir(directory)
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|
|
}
|
|
|
|
|
|
// 判断所给路径文件/文件夹是否存在
|
|
|
func Exists(path string) bool {
|
|
|
_, err := os.Stat(path) //os.Stat获取文件信息
|
|
|
if err != nil {
|
|
|
if os.IsExist(err) {
|
|
|
return true
|
|
|
}
|
|
|
return false
|
|
|
}
|
|
|
return true
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
功能:将int数据类型转为int64
|
|
|
作者:黄海
|
|
|
时间:2020-02-18
|
|
|
*/
|
|
|
func ConvertIntToInt64(i int) int64 {
|
|
|
s := strconv.Itoa(i)
|
|
|
s64, _ := strconv.ParseInt(s, 10, 64)
|
|
|
return s64
|
|
|
}
|
|
|
|
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/**
|
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|
功能:将字符串转为整数
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|
作者:黄海
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|
时间:2020-04-17
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|
*/
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|
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func ConvertStringToInt(s string) int {
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|
i, _ := strconv.Atoi(s)
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|
|
return i
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|
|
}
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|
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|
|
|
/**
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|
|
功能:将字符串转为int32整数
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|
|
作者:黄海
|
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|
时间:2020-04-17
|
|
|
*/
|
|
|
func ConvertStringToInt32(s string) int32 {
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|
|
i, _ := strconv.Atoi(s)
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|
|
return int32(i)
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|
|
}
|
|
|
|
|
|
/**
|
|
|
功能:将字符串转为整数64
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|
|
作者:黄海
|
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|
时间:2020-04-17
|
|
|
*/
|
|
|
func ConvertStringToInt64(s string) int64 {
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|
|
i, _ := strconv.ParseInt(s, 10, 64)
|
|
|
return i
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
功能:将整数转为字符串
|
|
|
作者:黄海
|
|
|
时间:2020-04-17
|
|
|
*/
|
|
|
func ConvertIntToString(i int) string {
|
|
|
s := strconv.Itoa(i)
|
|
|
return s
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
功能:将整数64转为字符串
|
|
|
作者:黄海
|
|
|
时间:2020-04-17
|
|
|
*/
|
|
|
func ConvertInt64ToString(i int64) string {
|
|
|
s := strconv.FormatInt(i, 10)
|
|
|
return s
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
功能:将int64转为int
|
|
|
作者:黄海
|
|
|
时间:2020-04-23
|
|
|
*/
|
|
|
func ConvertInt64ToInt(int64Num int64) int {
|
|
|
// 将 int64 转化为 int
|
|
|
intNum := *(*int)(unsafe.Pointer(&int64Num))
|
|
|
return intNum
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
功能:将JSON字符串转化为map数组
|
|
|
作者: 黄海
|
|
|
时间:2020-04-17
|
|
|
*/
|
|
|
func ConvertJsonStringToMapArray(data string) []map[string]interface{} {
|
|
|
var m = make([]map[string]interface{}, 0)
|
|
|
str := []byte(data)
|
|
|
json.Unmarshal(str, &m)
|
|
|
return m
|
|
|
}
|
|
|
/**
|
|
|
功能:判断目录是否存在
|
|
|
*/
|
|
|
func PathExists(path string) (bool, error) {
|
|
|
_, err := os.Stat(path)
|
|
|
if err == nil {
|
|
|
return true, nil
|
|
|
}
|
|
|
if os.IsNotExist(err) {
|
|
|
return false, nil
|
|
|
}
|
|
|
return false, err
|
|
|
}
|
|
|
|
|
|
//获取文件修改时间 返回unix时间戳
|
|
|
func GetFileModTime(path string) int64 {
|
|
|
f, err := os.Open(path)
|
|
|
if err != nil {
|
|
|
log.Println("open file error")
|
|
|
return time.Now().Unix()
|
|
|
}
|
|
|
defer f.Close()
|
|
|
|
|
|
fi, err := f.Stat()
|
|
|
if err != nil {
|
|
|
log.Println("stat fileinfo error")
|
|
|
return time.Now().Unix()
|
|
|
}
|
|
|
|
|
|
return fi.ModTime().Unix()
|
|
|
}
|
|
|
//自己编写一个函数,接收两个文件路径 srcFileName dstFileName
|
|
|
func CopyFile(srcFileName string,dstFileName string) (written int64, err error) {
|
|
|
srcFile, err := os.Open(srcFileName)
|
|
|
if err != nil {
|
|
|
fmt.Printf("open file err = %v\n", err)
|
|
|
return
|
|
|
}
|
|
|
defer srcFile.Close()
|
|
|
//打开dstFileName
|
|
|
dstFile, err := os.OpenFile(dstFileName, os.O_WRONLY | os.O_CREATE, 0755)
|
|
|
if err != nil {
|
|
|
fmt.Printf("open file err = %v\n", err)
|
|
|
return
|
|
|
}
|
|
|
defer dstFile.Close()
|
|
|
return io.Copy(dstFile, srcFile)
|
|
|
} |