Extjs ajax同步请求时post方式参数发送方式

var conn = Ext.lib.Ajax.getConnectionObject().conn; conn.open("POST", 'http://localhost:8080/struts2study/TreeDDGet?node=-1',false); // 这里的conn对象其实就是 xmlHttpRequest 对象。 conn.setRequestHeader("Content-Type","application/x-www-form-urlencoded;charset=UTF-8"); conn.send("start=" + 0 + "&limit=" + 30 ); var rootJson = conn.responseText;