ajax常用操作

ajax常用操作

load的方法的使用(现在已不常用)

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>

<!-- 引进jQuery -->

<script src="jquery.js"></script>
<style type="text/css">
  input{
    margin-top: 30px;
  }
  div{
    margin-top: 20px;
     150px;
    height: 60px;
    border:2px solid red;
  }
</style>


</head>
<body>

<input type="button" value="button-1" ></div>

<input type="button" value="button-2" ></div>

<input type="button" value="button-3" ></div>

<script type="text/javascript">
  $('#button1').click(function () {
  //Math.random()能够解决严重的缓存问题,特别对于ie
    $('#content1').load('demo1.php?'+Math.random(),function(msg){
      $('#content1').html(msg);
    })
  });

  $('#button2').click(function () {
  //在html中获取地址栏中传递的参数
    $('#content2').load('demo2.html#one?'+Math.random(),function(msg){
      $('#content2').html(msg);
    })
  });

  $('#button3').click(function () {
  //在html中获取地址栏中传递的参数
    $('#content3').load('demo3.php?'+Math.random(),function(msg){
      $('#content3').html(msg);
    })
  });

</script>
</body>
</html>

demo1.php的内容是:

  <?php
    echo '这是php文件返回的内容,将会返回到div里';

  ?>

demo2.html的内容是:

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>demo2</title>
  </head>
  <body>
    <span >我是id为two里span里的内容</span>
  </body>
</html>

demo3.php的内容是:

  <?php
     sleep(3);//3秒后响应

     echo '111';

  ?>

ajax----表单序列化

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>

<!-- 引进jQuery -->

<script src="jquery.js"></script>

</head>
<body>

  <form method="post">
    a项:<input type="text" name="a" /><br/>
    b项:<input type="text" name="b" /><br/>
    c项:<input type="text" name="c" /><br/>
    d项:<input type="text" name="d" /><br/>
    e项:<input type="text" name="e" /><br/>
    f项:<input type="text" name="f" /><br/>
    <input type="button" />
  </form>

  <script type="text/javascript">

  //表单序列化,一定要包含在form里,每个元素要有name属性
    $('#submit').click(function () {
    //表单序列化得到所有数据
    var data = $('form').serialize();
    $.ajax({
      type: "POST",
      url:'demo4.php',
      data:data,// 要提交的表单
      success: function(ms) {
      alert($('form').serialize());
      alert(ms);
      },
    error:function(jqXHR,textStatus,errorThrown){
      if(errorThrown == 'Not Found'){
        console.log('请求地址不存在');
      }
      if(textStatus == 'timeout'){
        console.log('请求超时');
      }
    }
  });
})

</script>
</body>
</html>

demo4.php的内容是:

  <?php
    echo $_POST['a'];

  ?>

ajax操作xml,json

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>demo</title>

<!-- 引进jQuery -->

<script src="jquery.js"></script>

</head>
<body>

   

   <input type="button" value="button-6" />

     <script type="text/javascript">

  //ajax操作xml

          });
        }
      })
    })

  //ajax操作json,eval的妙用
    $('#button6').click(function(){
      $.ajax({
        url:'demo6.php?'+Math.random(),
        type:'get',
        dataType:'json',
        success:function(rs){
          alert(eval(rs));//object
          alert(eval(rs[0].AreaId));//123
        }
      })
    })

     </script>
</body>
</html>

stu.xml的内容是:

  <?xml version="1.0" encoding="UTF-8"?>

  <stu>
    <title>
      <li>aa</li>
    </title>
    <title>
      <li>bb</li>
    </title>
    <title>
      <li>cc</li>
    </title>
  </stu>

demo6.php的内容是:

  <?php
   

    $strJSON = '[{"AreaId":"123"},{"AreaId":"345"}]';

    echo $strJSON;

  ?>