获取参数为空时 进行判断

src/main/webapp/WEB-INF/jsp/admin/user/update.jsp

@@ -325,14 +325,20 @@
         }
 
         form.render();
-        var data = ${unit};
-        var zNodes =[];
+        var data = '${unit}';
+        if(data != '') {
+            data = eval('(' + data + ')');
+            var zNodes =[];
 
-        for (var i=0;i<data.length;i++){
-            zNodes.push({id:data[i].codeStr,pId:data[i].pid,name:data[i].name,open:false,file:"core/simpleData"});
+            for (var i=0;i<data.length;i++){
+                zNodes.push({id:data[i].codeStr,pId:data[i].pid,name:data[i].name,open:false,file:"core/simpleData"});
+            }
+            setTree(zNodes,"unit","nocheck","unitcode","unitname","");
         }
-        setTree(zNodes,"unit","nocheck","unitcode","unitname","");
-        var data = ${role};
+
+        data = '${role}';
+        if(data != ''){
+            data = eval('('+data+')');
         var checkData = ${oldRole};
         var oldPerStr = "",oldPerIdStr="";
         var zNodes =[];
@@ -352,6 +358,7 @@
         //设置原有权限回显
         $("#roleId").val(oldPerIdStr);
         $("#roleName").val(oldPerStr);
+        }
     });
 </script>
 <script>