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)

	}

}