Golang Generating directory nesting JSON using Jstree display

This is a creation in Article, where the information may have evolved or changed.

• Purpose: Browse the computer's designated directory on the browser.
• Technology: Golang,jstree

1. Golang generate JSON for jstree recognition

1.1 using "Io/ioutil" to read the specified directory

fileinfos, err := ioutil.ReadDir(dirpath)ifnil {    log.Println("ReadDir error!" + dirpath)}

1.2 using "Encoding/json" to generate JSON data

typeTreestatestruct{OpenedBOOL ' JSON: ' opened 'DisabledBOOL ' JSON: ' Disabled 'SelectedBOOL ' JSON: ' Selected '}typeFiletreestruct{Idstring            ' JSON: ' ID 'Textstring            ' JSON: ' Text 'Iconstring            ' JSON: ' Icon,omitempty 'State *treestate' JSON: ' State,omitempty 'ChildrenBOOL              ' JSON: ' Children,omitempty 'Li_attrMap[string]string ' JSON: ' Li_attr,omitempty 'A_attrMap[string]string ' JSON: ' A_attr,omitempty '}

1.2.1 ignores items that are empty

Add Omitempty to unnecessary items when you declare a struct so that when the JSON is generated, it is ignored if the item is empty.

1.2.2 Nested JSON

• A struct is nested within a struct, such as *treestate

true// Selected为true的话，在jstree中会默认选中tree.State = state

• Use a map in a struct, such as map[string]string

// A_attr的href项表示该文件选项的链接地址map[string]string{"href""/download?file=" + tree.Id}

2. Jstree using Ajax

<div id="Using_ajax"></div><script  type  =< Span class= "Hljs-value" > "Text/javascript" ; $ ( ' #using_ajax ' ). Jstree ({: {: { ' URL ' :  "/tree_file" ,  "DataType" :  "JSON" ,  ' data ' :  function   { if  (node.id===< Span class= "hljs-string" > ' # ' ) {return  { ' ID ' /span>:  "D:" }; //root directory is D disk } else  {return  { ' id ' : node.id}; } } } }});</script>

Full code:

Tree.html
Treefile.go