$.ajax({
    url: '/api/data',
    type: 'GET',
    success: function(response) {
        if (response && response.length > 0) {
            // 处理数据
        } else {
            console.log('服务器返回空数据');
        }
    },
    error: function(xhr, status, error) {
        console.error('请求失败:', status, error);
    }
});

// 后端需要设置这些响应头
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET, POST, PUT, DELETE
Access-Control-Allow-Headers: Content-Type

$.ajax({
    url: '/api/data',
    type: 'POST',
    data: JSON.stringify({id: 123}),  // 确保数据格式正确
    contentType: 'application/json',
    success: function(response) {
        console.log(response);
    }
});

// 使用Promise
function fetchData() {
    return new Promise((resolve, reject) => {
        $.ajax({
            url: '/api/data',
            type: 'GET',
            success: resolve,
            error: reject
        });
    });
}

// 使用async/await
async function getData() {
    try {
        const data = await fetchData();
        console.log(data);
    } catch (error) {
        console.error(error);
    }
}

$.ajax({
    url: '/api/data?_=' + new Date().getTime(),
    type: 'GET',
    cache: false,
    success: function(response) {
        console.log(response);
    }
});