Go语言Gin处理响应方式详解

func (c *Context) String(code int, fORMat string, values …interface{})

r.GET("/", func(c *gin.Context) {
	c.String(Http.StatusOK, "hello world")
})

// localhost:8080/user
type User struct {
	Name string `json:"name"`
	Age  int    `json:"age"`
}
r.GET("/user", func(c *gin.Context) {
	u := &User{
		Name: "lucifer",
		Age:  18,
	}
	c.JSON(http.StatusOK, u)
})

// localhost:8080/student
type Student struct {
	Name string `xml:"name"`
	Age  int    `xml:"age"`
}
r.GET("/student", func(c *gin.Context) {
	s := &Student{
		Name: "lucifer",
		Age:  19,
	}
	c.XML(http.StatusOK, s)
})

// 4.1 直接返回
r.GET("/file", func(c *gin.Context) {
	c.File("./readme.txt")
})
// 4.2 返回文件，指定下载文件名
r.GET("/filename", func(c *gin.Context) {
	c.FileAttachment("./readme.txt", "change_file_name.txt")
})

package main

import (
	"GitHub.com/gin-Gonic/gin"
	"net/http"
)


func main() {
	// 一、实例化服务
	r := gin.Default()

	// 二、路由

	// 1.直接返回string
	// localhost:8080
	r.GET("/", func(c *gin.Context) {
		c.String(http.StatusOK, "hello world")
	})

	// 2.返回json 数据
	// localhost:8080/user
	type User struct {
		Name string `json:"name"`
		Age  int    `json:"age"`
	}
	r.GET("/user", func(c *gin.Context) {
		u := &User{
			Name: "lucifer",
			Age:  18,
		}
		c.JSON(http.StatusOK, u)
	})

	// 3.返回xml数据
	// localhost:8080/student
	type Student struct {
		Name string `xml:"name"`
		Age  int    `xml:"age"`
	}
	r.GET("/student", func(c *gin.Context) {
		s := &Student{
			Name: "lucifer",
			Age:  19,
		}
		c.XML(http.StatusOK, s)
	})
	
	// 4.返回文件
	// 4.1 直接返回
	r.GET("/file", func(c *gin.Context) {
		c.File("./readme.txt")
	})
	// 4.2 返回文件，指定下载文件名
	r.GET("/filename", func(c *gin.Context) {
		c.FileAttachment("./readme.txt", "change_file_name.txt")
	})

	// 三、启动服务
	r.Run(":8080")
}