beego 返回数据 json 文本

beego 返回数据格式 json 文本 模板

1. 文字

直接输出字符串

用法：
beego.Controller.Ctx.WriteString(“输出内容”)

2. json

输出json格式

用法：
beego.Controller.Date[“Json”]=json数据
beego.Controller.ServeJSON()

调用 ServeJSON 之后，会设置 content-type 为 application/json，然后同时把数据进行 JSON 序列化输出

3. example

// Beego project main.go
package main

import (
	"fmt"

	"github.com/astaxie/beego"
	"github.com/astaxie/beego/orm"
	_ "github.com/go-sql-driver/mysql"
)

// define sql models struct

type Software struct {
	ID          int64  `orm:pk;auto`
	ProductSN   string `orm:size(200)`
	ProductName string `orm:size(200)`
	comment     string
}

// define interface
type ResponseWork struct {
	beego.Controller
}

type ResponseJson struct {
	beego.Controller
}

// Get retuen ResponseWork
func (w *ResponseWork) Get() {
	w.Ctx.WriteString("Rain: hello world 。。。")
}

// Get retuen ResponseJson
func (j *ResponseJson) Get() {
	productName := j.GetString("product_name")
	softwareID, sErr := j.GetInt("id")
	offset, oErr := j.GetInt("offset")
	page, pErr := j.GetInt("page")

	if sErr == nil {
		softwareID = 0
	}

	if oErr == nil {
		offset = 1
	}

	if pErr == nil {
		page = 1
	}
	// 根据条件查询software数据
	_, softwareList, err := ListTceSoftware(productName, softwareID, page, offset)

	if err != nil {
		return
	}
	// 格式化为json数据并返回
	j.Data["json"] = &softwareList

	j.ServeJSON()
}

func init() {
	orm.RegisterDriver("mysql", orm.DRMySQL)
	// register mysql by : user passwork ip port database
	orm.RegisterDataBase("default", "mysql", "user:password@tcp(ip:port)/database?charset=utf8")
	orm.RegisterModel(new(Software))
}

func main() {
	fmt.Println("Hello Beego")
	beego.Router("/workd", &ResponseWork{})
	beego.Router("/json", &ResponseJson{})
	beego.Run()
}

// ListTceSoftware return softwares information
func ListTceSoftware(productName string, softwareID int, offset int, page int) (num int64, softwares []Software, err error) {
	o := orm.NewOrm()
	qt := o.QueryTable("tce_software")

	// build query condtion
	cond := orm.NewCondition()
	if productName != "" {
		cond = cond.And("ProductName", productName)
	}

	if softwareID != 0 {
		cond = cond.And("ID", softwareID)
	}

	if page < 1 {
		page = 1
	}

	if offset < 0 {
		offset, _ = beego.AppConfig.Int("pageoffset")
	}
	start := (page - 1) * offset

	var softwareList []Software
	num, err = qt.SetCond(cond).OrderBy("-id").Limit(offset, start).All(&softwareList)
	return num, softwareList, err
}