nodejs express template (模版)的使用 (ejs + express)

浏览数：21 / 时间：2015年06月09日

var app=require("express").createServer();                                                                                                                            
                                                                                                                                                                                                                                                          
app.set("view engine","ejs");                                                                                                                            
                                                                                                                                                                                                                                                          
app.get("/",function(req,res){                                                                                                                            
    res.render("index",{"title":"test"});                                                                                                                            
});                                                                                                                            
                                                                                                                                                                                                                                                          
app.listen(3000);

1、上面是express使用模版的一个基本例子

app.set("view engine","ejs"); 这句将模版引擎设置为 ejs （http://github.com/visionmedia/ejs）

ejs可通过 npm install ejs 来进行安装

2、在app.get中。

res.render("index",{"title":"test"}); 会执行2个步骤。

会读取 ./views/index.ejs文件的内容，然后将其中的title变量替换为test,例如<%=title%>会变为test。假设返回的内容为content1
接着，会读取./views/layout.ejs，并将其中的body变量替换为content1，例如<%=body%>会变为content1的内容。

3、在2中，如果不愿意使用默认的layout.ejs，可自行指定。例如：

res.render("index",{"title":"test","layout":"main"});

或

res.render("index",{"title":"test","layout":"main.ejs"});

4、如果不愿意使用layout，则可以设置layout为false，例如:

res.render("index",{"layout":false});

5、如果不想每个请求都单独设置一次。可以使用全局设置：

app.set("view options",{                                                                                          
                                                                                                                                                                                      
    "layout":false
                                                                                                                                                                                      
});

6、ejs 里，默认的闭合标记是 <% .. %>，我们也可以定义自己的标签。例如：

app.set("view options",{                                                                                  
   "open":"{{",                                                                                  
   "close":"}}"
});