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day9接口 练习7.9

master
独孤伶俜 2022-12-17 13:49:45 +08:00
parent 6a1339b1f2
commit 7ea088b7e3
3 changed files with 105 additions and 28 deletions
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30
src/study/day9Interface/Practice/7.8.go
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@ -1,6 +1,7 @@
package main package main
import ( import (
"Study/src/study/day9Interface/Practice/comm"
"fmt" "fmt"
"reflect" "reflect"
"sort" "sort"
@ -17,37 +18,10 @@ import (
// 4. 实现点击一栏就对一栏排序 // 4. 实现点击一栏就对一栏排序
// 1. 定义数据类型 // 1. 定义数据类型
type Person struct {
Name string
Age int
Sex bool
ID int
}
type PersonSlice []Person
// Less 没有实现sort.Interface的Less方法
func (p PersonSlice) Less(i, j int, field string) bool {
return PersonByField(p[i], p[j], field)
}
// PersonByField 按照字段排序
func PersonByField(i, j Person, field string) bool {
switch field {
case "Name":
return i.Name > j.Name
case "Age":
return i.Age < j.Age
case "Sex":
return i.Sex != j.Sex
case "ID":
return i.ID < j.ID
}
return false
}
func main() { func main() {
// 构建数据 // 构建数据
data := PersonSlice{ data := comm.PersonSlice{
{"a", 1, true, 1}, {"a", 1, true, 1},
{"b", 2, false, 2}, {"b", 2, false, 2},
{"c", 3, true, 3}, {"c", 3, true, 3},

73
src/study/day9Interface/Practice/7.9.go Normal file
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@ -0,0 +1,73 @@
package main
import (
"Study/src/study/day9Interface/Practice/comm"
"html/template"
"log"
"net/http"
"os"
"sort"
)
// 使用html/template包（§4.6）替代printTracks将tracks展示成一个HTML表格。
// 将这个解决方案用在前一个练习中，让每次点击一个列的头部产生一个HTTP请求来排序这个表格。
const TEMPL = `
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<!--额加个边框吧-->
<table border="1" cellspacing="0">
<tr>
<th><a href="/?sort=Name">Name</a></th>
<th><a href="/?sort=Age">Age</a></th>
<th><a href="./?sort=Sex">Sex</a></th>
<th><a href="./?sort=ID">ID</a></th>
</tr>
{{range .}}
<tr>
<td>{{.Name}}</td>
<td>{{.Age}}</td>
<td>{{.Sex}}</td>
<td>{{.ID}}</td>
</tr>
{{end}}
</table>
</body>
</html>
`
func main() {
// 构建数据
data := comm.PersonSlice{
{"a", 1, true, 1},
{"b", 2, false, 2},
{"c", 3, true, 3},
{"d", 4, false, 4},
{"e", 5, true, 5},
{"f", 6, false, 6},
{"g", 7, true, 7},
}
// 构建模版
templ, err := template.New("test").Parse(TEMPL)
if err != nil {
log.Fatalln(err)
}
templ.Execute(os.Stdout, data)
// 注册web
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
// 排序
sort.Slice(data, func(i, j int) bool {
// 获得sort参数
return data.Less(i, j, r.FormValue("sort"))
})
// 输出
templ.Execute(w, data)
})
// 监听
http.ListenAndServe(":8080", nil)
}

30
src/study/day9Interface/Practice/comm/comm.go Normal file
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@ -0,0 +1,30 @@
package comm
type Person struct {
Name string
Age int
Sex bool
ID int
}
type PersonSlice []Person
// Less 没有实现sort.Interface的Less方法
func (p PersonSlice) Less(i, j int, field string) bool {
return PersonByField(p[i], p[j], field)
}
// PersonByField 按照字段排序
func PersonByField(i, j Person, field string) bool {
switch field {
case "Name":
return i.Name > j.Name
case "Age":
return i.Age < j.Age
case "Sex":
return i.Sex != j.Sex
case "ID":
return i.ID < j.ID
}
return false
}