var setting = {
async: {
enable: true,
url:"./DispatchAction.do?queryTree",
autoParam:["id", "name", "level","pId","themeType","themeStatus","themeLevel"],
otherParam:{"metaData":"","varNameH":"test"},
dataFilter: filter },……};
function beforeAsync(treeId, treeNode) {
setting.async.otherParam.metaData = "ZB";
setting.async.otherParam.varNameH = "HH";
alert(setting.async.otherParam.metaData+"!");
return true; };
这里JS打印出来的是ZB,但后台获得是""，感觉后台获得的是树初始化时的otherParam，在树上做了一些改变的时候比如新增节点怎么改变otherParam的值呢？

修改 外面的 setting 是不行的，要修改 zTreeObj.setting 里面的数据

哦，多谢树哥指点@ztreeapi