009-Go 读取写入CSV文件

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package main
 
import(
    "encoding/csv"
    "fmt"
    "os"
    "strconv"
)
 
type Post struct{
    Id  int
    Content string
    Author  string
}
 
func main(){
    csvFile, err := os.Create("posts.csv")
    if err!= nil{
        panic(err)
    }
    defer csvFile.Close()
 
    posts := []Post{
        Post{Id:100,Content:"Hello go",Author:"张三"},
        Post{Id:200,Content:"Hello java",Author:"李四"},
        Post{Id:300,Content:"Hello php",Author:"王五"},
    }
 
    writer := csv.NewWriter(csvFile)
    for _,post := range posts{
        line := []string{strconv.Itoa(post.Id), post.Content, post.Author}
        err := writer.Write(line)
        if err != nil{
            panic(err)
        }
    }
    writer.Flush()
 
    file,err := os.Open("posts.csv")
    if err != nil{
        panic(err)
    }
    defer file.Close()
 
    reader := csv.NewReader(file)
    reader.FieldsPerRecord = -1
    record, err := reader.ReadAll()
    if err != nil{
        panic(err)
    }
 
    var myposts []Post
    for _, item := range record{
        id, _ := strconv.ParseInt(item[0], 0, 0)
        post := Post{Id: int(id), Content:item[1], Author:item[2]}
        myposts = append(myposts, post)
    }
 
    for _, value := range myposts{
        fmt.Printf("Id:%d,Content:%s,Author:%s\n", value.Id, value.Content, value.Author)
    }
 
}

  

posted @   yshy  阅读(382)  评论(0编辑  收藏  举报
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