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https://golang.google.cn/pkg/
数据处理
encoding/(例如:encoding/json、encoding/xml、encoding/base64)
hash/(例如:hash/adler32、hash/crc32、hash/fnv)
bytes
strconv
文件操作
os
path/(例如:path/filepath)
bufio
compress/(例如:compress/gzip、compress/zlib)
网络通信
net
net/http
net/http/(例如:net/http/httputil、net/http/pprof)
net/url
net/rpc
net/smtp
加密和安全
crypto/(例如:crypto/md5、crypto/aes、crypto/rsa)
crypto/rand
crypto/tls
crypto/x509
时间处理
time
容器和集合
container/(例如:container/heap、container/list)
sort
并发和同步
sync/(例如:sync/atomic)
runtime
runtime/pprof
runtime/trace
测试和调试
testing
testing/(例如:testing/iotest、testing/quick)
文本处理
fmt
strings
unicode/(例如:unicode/utf8、unicode/utf16)
text/(例如:text/template、text/scanner)
其他
errors
flag
log
math
math/(例如:math/big、math/rand)
sync/atomic
unsafe
package main import ( "os" "path/filepath" "bufio" ) func main() { // 创建文件 file, err := os.Create("example.txt") if err != nil { panic(err) } defer file.Close() // 写入文件 writer := bufio.NewWriter(file) _, err = writer.WriteString("Hello, World!\n") if err != nil { panic(err) } writer.Flush() // 读取目录 files, err := filepath.Glob("*.txt") if err != nil { panic(err) } for _, f := range files { println(f) } }
package main import ( "net/http" "net/url" ) func main() { // 发送 HTTP 请求 resp, err := http.Get("https://www.example.com") if err != nil { panic(err) } defer resp.Body.Close() // 解析 URL u, err := url.Parse("https://www.example.com/path?query=value") if err != nil { panic(err) } println("Host:", u.Host) println("Path:", u.Path) println("Query:", u.Query().Get("query")) }
package main import ( "sync" "time" ) func main() { var wg sync.WaitGroup wg.Add(2) go func() { defer wg.Done() time.Sleep(time.Second) println("Goroutine 1 completed") }() go func() { defer wg.Done() time.Sleep(2 * time.Second) println("Goroutine 2 completed") }() wg.Wait() println("All goroutines completed") }
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