1.前台调用ajax访问后台方法，并接收数据
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>success</title>
</head>
<script type="text/javascript">
function ajax(url, fnSucc) {
if (window.XMLHttpRequest) {
var oAjax = new XMLHttpRequest();
} else {
var oAjax = new ActiveXObject("Microsoft.XMLHTTP");//IE6浏览器创建ajax对象
}
oAjax.open("GET", url, true);//把要读取的参数的传过来。
oAjax.send();
oAjax.onreadystatechange = function () {
if (oAjax.readyState == 4) {
if (oAjax.status == 200) {
fnSucc(oAjax.responseText);//成功的时候调用这个方法
} else {
if (fnfiled) {
fnField(oAjax.status);
}
}
}
};
} function change() {
ajax('/abc2?user="wangerxiao"', function (str) {
alert(str);
})
}
</script>
<body>
<h1>this is success page</h1>
<h2>${msg}</h2>
<div class="form" style="width: 100px;height: 100px;background-color: red" onclick="change()">
</div>
</body>
</html>
2.后台处理请求返回数据map以及list
@Controller
public class HelloController {
@GetMapping("/abc2")
@ResponseBody
public Map<String,Object> hello2(@RequestParam("user")String user){
System.out.println(user);
List<String> list = new ArrayList<>();
list.add("a");
list.add("b");
list.add("c");
Map<String,Object> map = new HashMap<>();
map.put("1","王二小");
map.put("2","刘明");
map.put("3","张三");
return map;
}
}