Java Web(十一)Ajax&Axios&JSON

  var xmlhttp;
  if (window.XMLHttpRequest){
    //code for IE7+,Firefox,Chrome,Opera,Safari
    xmlhttp = new XMLHttpRequest();
  )else{
    ∥code for IE6,IE5
    xmlhttp new = ActiveXObject("Microsoft.XMLHTTP");
  }

  xmlhttp.open("GET","url");
  xmlhttp.send(O;∥发送请求

  xmlhttp.onreadystatechange function (){
    if(xmlhttp.readyState ==4 && xmlhttp.status ==200){
    alert(xmlhttp.responseText);
  }

<script src="js/axios-0.18.0.js"></script>

axios({
    method:"get",
    url:"http://localhost:8080/ajax-demo1/aJAXDemo1?username=zhangsan"
}).then(function (resp){
  alert(resp.data);
})

axios((
    method:"post",
    url:"http://localhost:8080/ajax-demo1/aJAXDemo1",
    data:"username=zhangsan"
}).then(function (resp){
  alert(resp.data);
}:

  axios.get("url")
      .then(function (resp){
      alert(resp.data);
  });

   axios.post("ur","参数")
    .then(function(resp){
    alert(resp.data);
  }

   var变量名={
    "key1":value1,
    "key2":value2,
    ...
    };

      var json {
      "name":"zhangsan",
      "age":23,
      "addr":["北京"，"上海"，"西安]
      };

  变量名.key

  json.name

   <dependency>
    <groupld>com.alibaba</groupld>
    <artifactld>fastjson</artifactld>
    <version>1.2.62</version>
  </dependency>

  String jsonStr = JSON.toJSONString(obj);

  User user = JSON.parseobject(jsonStr,User.class);