Java生成easyUI樹的json來實現對角色權限的管理

利用easyUI的樹來實現對角色權限的管理 

easyUI 樹的格式：

{
   "id":1,
   "text":"Foods",
   "children":[{
      "id":2,
      "text":"Fruits",
      "state":"closed",
      "children":[{
         "text":"apple",
         "checked":true
      },{
         "text":"orange"
      }]
   },{
      "id":3,
      "text":"Vegetables",
      "state":"open",
      "children":[{
         "text":"tomato",
         "checked":true
      },{
         "text":"carrot",
         "checked":true
      },{
         "text":"cabbage"
      },{
         "text":"potato",
         "checked":true
      },{
         "text":"lettuce"
      }]
   }]
}]

java生成tree的數據結構，並轉化成json傳到前端：

//先獲取系統所有權限
List<TRules> ruleList = tRulesService.selectAllRules();
//獲取所有模塊
List<TRules> moduleList = tRulesService.selectAllModules();
//根據角色獲取當前用戶所有權限
String roleRules = tRoleRulesService.selectAllRulesByRoleName(roleName);

//生成樹的格式 text對應module，children 對應role
ArrayList<HashMap<String,Object>> userRoleList = new ArrayList<HashMap<String, Object>>();
//初始化模塊
for(int i = 0; i < moduleList.size(); i++){
   HashMap<String,Object> roleMap = new HashMap<String, Object>();
   roleMap.put("id",i+1);
   roleMap.put("text",moduleList.get(i).getModule());//生成模塊的節點
   roleMap.put("state","open");
   roleMap.put("children",new ArrayList<HashMap<String,Object>>());//子樹用於保存該模塊下的權限
   userRoleList.add(roleMap);
}

//初始化權限
for(int i =0; i < ruleList.size(); i++){
   for(int j = 0; j < userRoleList.size(); j++){
      HashMap<String,Object> roleMap = userRoleList.get(j);
      //找到對應的模塊
      if(roleMap.get("text").equals(ruleList.get(i).getModule())){
         HashMap<String,Object> childMap = new HashMap<String, Object>();
         childMap.put("id",roleMap.get("id") + "" + (i+1));
         childMap.put("text",ruleList.get(i).getRuleName());
         //如果當前用戶有這個權限，則勾選上
         if(!Util.isBlank(roleRules) && roleRules.contains(ruleList.get(i).getRuleName()))
            childMap.put("checked","true");
         //放到children中
         ArrayList<HashMap<String,Object>> list =  (ArrayList)roleMap.get("children");
         list.add(childMap);
         break;
      }
   }
}

String listJson = JSON.toJSONString(userRoleList);