使用Javascript发送参数

var param1 = 'value1';
var param2 = 'value2';
var url = 'http://example.com/api?param1=' + encodeURIComponent(param1) + '&param2=' + encodeURIComponent(param2);

var xhr = new XMLHttpRequest();
var url = 'http://example.com/api';
var params = 'param1=value1&param2=value2';
xhr.open('POST', url, true);
xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
xhr.onreadystatechange = function() {
  if (xhr.readyState == 4 && xhr.status == 200) {
    console.log(xhr.responseText);
  }
};
xhr.send(params);

var url = 'http://example.com/api';
var params = {
  param1: 'value1',
  param2: 'value2'
};
fetch(url, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify(params)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.log(error));

var url = 'http://example.com/api';
var params = {
  param1: 'value1',
  param2: 'value2'
};
$.ajax({
  url: url,
  type: 'POST',
  data: params,
  success: function(data) {
    console.log(data);
  },
  error: function(error) {
    console.log(error);
  }
});