1.js代码

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Ext.onReady(function(){
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??? Ext.Ajax.request({
???
??? ??? url:"AjaxServlet.do?name=里杂谈",
??? ??? //url:"AjaxServlet.do",
??? ??? method:"get",
??? ??? //params:{name:"xxx"},
??? ???
??? ??? success:function(res,config){
??? ??? ??? alert(config.url);
??? ??? ??? alert(config.method);
??? ??? ???
??? ??? ??? alert(res.responseText);
??? ??? ??? //var json = res.responseText;
??? ??? ??? var json = Ext.util.JSON.decode(res.responseText);
??? ??? ???
??? ??? ??? alert("xx");
??? ??? ??? Ext.MessageBox.alert("提示",json.author);
??? ??? },
??? ??? failure:function(){
??? ??? ??? Ext.MessageBox.alert("result","请求失败")
??? ??? ???
??? ??? }
??? });

})

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2.servlet

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System.out.println("+++++");
??? ??? response.setContentType("text/html,charset=utf-8");
??? ??? PrintWriter out = response.getWriter();
??? ??? String name1 = request.getParameter("name");
??? ??? String name = "'"+name1+"'";
??? ??? System.out.println(name);
??? ??? Date date = new Date();
??? ??? //String time = date.toString();
??? ??? //String json = "{authon:" + name + ",time:" + time + "}";
??? ??? String json = "{author:"+name+"}";//转换成json。格式{name:"name"},而不是{name:name}
??? ???
??? ??? out.println(json);
??? ???
??? ??? System.out.println(json);
??? ??? out.flush();
??? ??? out.close();

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web.xml配置

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这个应该没问题吧，有问题QQ 1019990976 注明 csdn ext.ajax.request servlet

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运行效果：

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