前文再续，之前一篇我们已经配置好了数据库以及模板引擎，现在可以在逻辑层编写具体业务代码了，博客平台和大多数在线平台一样，都是基于用户账号体系来进行操作，所以我们需要针对用户表完成用户账号的CURD操作。
用户后台模板
首先用户操作逻辑主要在后台展现，所以模板应该单独生成admin文件夹，和前台模板进行逻辑隔离：
cd views mkdir admin 随后创建用户管理页面模板user.html:
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width="16" height="16" role="presentation" style="pointer-events: none;"></div></div><div class="react-toggle-thumb"></div></div> <div class="search navbar-right" > <form action="/Index_search" method ="GET" class="search_form" > <input type="search" name="text" class="search_input" placeholder="Search" required="required" > </form> </div> </div> </div> </nav> <div class="container"> <header> </header> <section> <div class="row"> <div class="col-md-8"> <ul class="g-formlist form_li"> <li> <label class="mark">用户名</label> <div class="write"> <input type="text" id="form-name" class="g-text-entry" placeholder="请输入4-10字符" /> <span class="tip" data-initial="请输入4-10字符"></span> </div> </li> <li> <label class="mark">密 码</label> <div class="write"> <input type="password" id="form-psw" class="g-text-entry" placeholder="请输入6-30字符" /> <span class="tip" data-initial="请输入6-30字符"></span> </div> </li> </ul> <button>提交</button> </div> </div> </section> </div> </div> </body> 模板目录架构如下：
└── views ├── admin │ └── user.html ├── index.html └── test.html views根目录模板为前台模板，而admin目录下模板是为后台模板。
同时前端声明username和password变量，分别绑定用户名和密码：
const App = { data() { return { //用户名 username: "", //密码 password:"" }; }, created: function() { console.log("你好，女神"); }, methods: { }, }; 接着构造用户添加表单，绑定表单字段：
<ul class="g-formlist form_li"> <li> <label class="mark">用户名</label> <div class="write"> <input v-model="username" type="text" id="form-name" class="g-text-entry" placeholder="请输入4-10字符" /> <span class="tip" data-initial="请输入4-10字符"></span> </div> </li> <li> <label class="mark">密 码</label> <div class="write"> <input v-model="password" type="password" id="form-psw" class="g-text-entry" placeholder="请输入6-30字符" /> <span class="tip" data-initial="请输入6-30字符"></span> </div> </li> </ul> <button @click="submit">提交</button> 这里通过v-model关键字将表单和变量做双向绑定，同时为按钮绑定submit提交方法。
如果愿意，我们也可以针对前端的axios库进行二次封装，增加异步请求方法的复用性：
const myaxios = function (url, type, data = {}) { return new Promise((resolve) => { if (type === "get" || type === "delete") { axios({ method: type, url: url, params: data }).then((result) => { resolve(result.data); }); } else { const params = new URLSearchParams(); for (var key in data) { params.append(key,data[key]); } axios({ method: type, url: url, data:params }).then((result) => { resolve(result.data); }); } }); } app.config.globalProperties.myaxios = myaxios; 这样，我们就可以随时使用this关键字来向后台发起异步请求了。
接着，编写后台视图，将用户后台模板渲染出来：
app.Get("/admin/user/", func(ctx iris.Context) { ctx.View("/admin/user.html") }) 编译后，访问 http://localhost:5000/admin/user/，如图所示：
用户后台接口
后台接口主要负责接收前端请求的参数，然后根据请求方式类型来决定用户表的操作动作，首先构建添加接口：
app.Post("/admin/user_action/", func(ctx iris.Context) { username := ctx.PostValue("username") password := ctx.PostValue("password") fmt.Println(username, password) ret := map[string]string{ "errcode": "0", "msg": "ok", } ctx.JSON(ret) }) 这里使用Post方式匹配路由/admin/user_action/，随后通过ctx结构体的PostValue函数来获取具体的参数key，然后利用ctx.JSON函数将字典序列化为Json，再返回给前端。
前端则使用之前封装好的myaxios内置方法向后端发起异步请求：
submit:function(){ this.myaxios("http://localhost:5000/admin/user_action/","post",{"username":this.username,"password":this.password}).then(data => { console.log(data) }); } 后台返回：
Now listening on: http://localhost:5000 Application started. Press CTRL+C to shut down. 19:30:58 app | admin admin 可以看到，后端打印出了前端请求的用户名和密码，接着就是入库操作：
app.Post("/admin/user_action/", func(ctx iris.Context) { username := ctx.PostValue("username") password := ctx.PostValue("password") fmt.Println(username, password) user := &model.User{Username: username, Password: password} res := db.Create(user) fmt.Println(res.Error) ret := map[string]string{ "errcode": "0", "msg": "ok", } ctx.JSON(ret) }) 这里初始化结构体变量user后，利用db.Create函数进行入库操作。
随后检查入库结果：
MySQL [irisblog]> select * from user; +----+---------------------+---------------------+------------+----------+----------+ | id | created_at | updated_at | deleted_at | username | password | +----+---------------------+---------------------+------------+----------+----------+ | 13 | 2022-08-22 19:33:16 | 2022-08-22 19:33:16 | NULL | admin | admin | +----+---------------------+---------------------+------------+----------+----------+ 1 row in set (0.00 sec) 入库操作虽然成功了，但显然，密码不能使用明文，否则不就步CSDN的后尘贻笑大方了吗？
添加md5加密逻辑：
w := md5.New() io.WriteString(w, password) //将str写入到w中 md5str := fmt.Sprintf("%x", w.Sum(nil)) 注意导入”crypto/md5″和”io”两个标准库包。
完成代码：
app.Post("/admin/user_action/", func(ctx iris.Context) { username := ctx.PostValue("username") password := ctx.PostValue("password") fmt.Println(username, password) w := md5.New() io.WriteString(w, password) //将str写入到w中 md5str := fmt.Sprintf("%x", w.Sum(nil)) user := &model.User{Username: username, Password: md5str} res := db.Create(user) fmt.Println(res.Error) ret := map[string]string{ "errcode": "0", "msg": "ok", } ctx.JSON(ret) }) 重新编译后，再次发起请求，检查入库结果：
MySQL [irisblog]> select * from user; +----+---------------------+---------------------+------------+----------+----------------------------------+ | id | created_at | updated_at | deleted_at | username | password | +----+---------------------+---------------------+------------+----------+----------------------------------+ | 16 | 2022-08-22 19:41:40 | 2022-08-22 19:41:40 | NULL | admin | 21232f297a57a5a743894a0e4a801fc3 | +----+---------------------+---------------------+------------+----------+----------------------------------+ 1 row in set (0.00 sec) 完成添加逻辑后，可以将用户列表批量查询出来：
app.Get("/admin/userlist/", func(ctx iris.Context) { var users []model.User res := db.Find(&users) ctx.JSON(res) }) 注意这里声明一个切片嵌套结构users，切片的每一个元素是用户结构体，接口返回：
{ Value: [ { ID: 16, CreatedAt: "2022-08-22T19:41:40+08:00", UpdatedAt: "2022-08-22T19:41:40+08:00", DeletedAt: null, Username: "admin", Password: "21232f297a57a5a743894a0e4a801fc3" }, { ID: 17, CreatedAt: "2022-08-22T19:48:25+08:00", UpdatedAt: "2022-08-22T19:48:25+08:00", DeletedAt: null, Username: "888123", Password: "202cb962ac59075b964b07152d234b70" }, { ID: 18, CreatedAt: "2022-08-22T19:48:28+08:00", UpdatedAt: "2022-08-22T19:48:28+08:00", DeletedAt: null, Username: "admin123", Password: "21232f297a57a5a743894a0e4a801fc3" } ], Error: null, RowsAffected: 3 } 随后，前端可以通过异步请求回调赋值将用户列表展示在页面中：
const App = { data() { return { //用户名 username: "", //密码 password:"", //用户列表 userlist:[] }; }, created: function() { console.log("你好，女神"); this.get_userlist(); }, methods: { get_userlist:function(){ this.myaxios("http://localhost:5000/admin/userlist/","get",).then(data => { console.log(data) this.userlist = data.Value }); }, submit:function(){ this.myaxios("http://localhost:5000/admin/user_action/","post",{"username":this.username,"password":this.password}).then(data => { console.log(data) }); } }, }; 随后，在页面中渲染userlist变量：
<table class="gridtable"> <tr> <th>用户id</th> <th>用户名</th> <th>添加时间</th> </tr> <tr v-for="(item,index) in userlist"> <td>{{ item.ID }}</td> <td>{{ item.Username }}</td> <td>{{ item.CreatedAt }}</td> </tr> </table> 请求 http://localhost:5000/admin/user/ 如图所示：
Vue.js+Iris的前后端联调流程就跑通了，当然有些地方还需要封装，比如md5加密环节，后续登录模块也依然会依赖md5包，项目根目录下建立mytool目录：
mkdir mytool cd mytool 将md5加密封装为函数：
package mytool import ( "crypto/md5" "fmt" "io" ) func Make_password(password string) string { w := md5.New() io.WriteString(w, password) //将str写入到w中 md5str := fmt.Sprintf("%x", w.Sum(nil)) return md5str } 随后通过包名进行调用：
md5str := mytool.Make_password(password) 结语
至此，前后端分离的用户系统就构建好了，开发效率层面，基于Go lang的Iris框架并不逊色于任何动态语言框架，语法的简明程度有过之而无不及，性能层面更是不遑多让，该项目已开源在Github：https://github.com/zcxey2911/IrisBlog ，与君共觞，和君共勉。
