Golang Gin 初识

1.Gin框架搭建,初识

  1 // main.go
  2 package main
  3 
  4 /***
  5     Gin入门:
  6         文档: https://gin-gonic.com/zh-cn/docs/quickstart/
  7     热加载:
  8         文档: https://github.com/cosmtrek/air/blob/master/README-zh_cn.md
  9         安装: go install github.com/cosmtrek/air@latest
 10         配置: alias air='/home/chad/golang/workspace/bin/air'
 11         初始化: 1. cd yourworkspace
 12             2. air -c .air.toml
 13                 3. air init
 14                 4. air
 15 ***/
 16 
 17 import (
 18     "net/http"
 19 
 20     "github.com/gin-gonic/gin"
 21 )
 22 
 23 // 快速入门
 24 func main1() {
 25     // 创建默认路由引擎
 26     r := gin.Default()
 27 
 28     // 配置路由
 29     r.GET("/", func(c *gin.Context) {
 30         c.String(http.StatusOK, "Value:%v", "Hello word!")
 31     })
 32 
 33     r.GET("/new", func(c *gin.Context) {
 34         c.String(http.StatusOK, "Value:%v", "我是新页面!")
 35     })
 36 
 37     r.GET("/new1", func(c *gin.Context) {
 38         c.String(http.StatusOK, "Value:%v", "我是新页面1!")
 39     })
 40 
 41     r.POST("/add", func(c *gin.Context) {
 42         c.String(http.StatusOK, "我是POST请求:%v", "主要用来新增数据!")
 43     })
 44 
 45     r.PUT("/edit", func(c *gin.Context) {
 46         c.String(http.StatusOK, "我是PUT请求:%v", "主要用来编辑数据!")
 47     })
 48 
 49     r.DELETE("/delete", func(c *gin.Context) {
 50         c.String(http.StatusOK, "我是DELETE请求:%v", "主要用来删除数据!")
 51     })
 52     r.Run("0.0.0.0:8000") // 默认监听 0.0.0.0:8080 上启动服务
 53 }
 54 
 55 func main() {
 56     TestResponseHTML() // 返回HTML
 57     // TestResponseJsonXML()  // 返回Json丶Xml数据
 58 }
 59 
 60 type UserInfo struct {
 61     UserID   string `json:"userid"`
 62     UserName string
 63     Age      int
 64 }
 65 
 66 type Article struct {
 67     Title   string `json:"title"`
 68     Content string `json:"content"`
 69 }
 70 
 71 // TestResponseHTML  返回HTML
 72 func TestResponseHTML() {
 73     router := gin.Default()
 74     // 配置模板路径
 75     router.LoadHTMLGlob("templates/*")
 76     // router.LoadHTMLFiles("templates/template1.html", "templates/template2.html", )
 77 
 78     router.GET("/news", func(c *gin.Context) {
 79         data := &Article{
 80             Title:   "新闻标题",
 81             Content: "新闻内容",
 82         }
 83         c.HTML(http.StatusOK, "news.html", gin.H{
 84             "title": "我是后台数据",
 85             "news":  data,
 86         })
 87     })
 88 
 89     router.Run("0.0.0.0:8080")
 90 
 91 }
 92 
 93 // 如何返回Json丶Xml数据
 94 func TestResponseJsonXML() {
 95     r := gin.Default()
 96 
 97     r.GET("/", func(c *gin.Context) {
 98         c.String(http.StatusOK, "首页")
 99     })
100 
101     r.GET("/json", func(c *gin.Context) {
102         c.JSON(http.StatusOK, map[string]interface{}{
103             "success": true,
104             "msg":     "你好gin.",
105         })
106     })
107 
108     r.GET("/json2", func(c *gin.Context) {
109         c.JSON(http.StatusOK, gin.H{
110             "success": true,
111             "msg":     "你好gin.  --22",
112         })
113     })
114 
115     r.GET("/json3", func(c *gin.Context) {
116         us := &UserInfo{
117             UserID:   "100",
118             UserName: "zhangsan",
119             Age:      18,
120         }
121         c.JSON(http.StatusOK, us)
122     })
123 
124     // jsonp  主要用来解决跨域问题
125     //       http://localhost:8080/jsonp?callback=xxx
126     //         xxx({"userid":"100","UserName":"zhangsan","Age":18});
127     r.GET("/jsonp", func(c *gin.Context) {
128         us := &UserInfo{
129             UserID:   "100",
130             UserName: "zhangsan",
131             Age:      18,
132         }
133         c.JSONP(http.StatusOK, us)
134     })
135 
136     r.GET("/xml", func(c *gin.Context) {
137         // gin.H = map[string]interface{}
138         c.XML(http.StatusOK, map[string]interface{}{
139             "success": true,
140             "msg":     "你好gin.",
141         })
142     })
143 
144     r.GET("/xml2", func(c *gin.Context) {
145         us := &UserInfo{
146             UserID:   "100",
147             UserName: "zhangsan",
148             Age:      18,
149         }
150         c.XML(http.StatusOK, us)
151     })
152     r.Run("0.0.0.0:8080")
153 }

2.HTML渲染

 1 // templates/news.html
 2 <!DOCTYPE html>
 3 <html lang="en">
 4 
 5 <head>
 6     <meta charset="UTF-8">
 7     <meta name="viewport" content="width=<device-width>, initial-scale=1.0">
 8     <title>Document</title>
 9 </head>
10 
11 <body>
12     <h2>我是首页 </h2>
13     <h2>{{.title}} </h2>
14     <hr>
15     <p>{{.news.Title}}</p>
16     <p>{{.news.Content}}</p>
17 </body>
18 
19 </html>