java-web/examples/chapter03/jquery-app.js

$(document).ready(function() {
    // GET 请求按钮
    $('#getButton').on('click', function() {
        $.getJSON('https://jsonplaceholder.typicode.com/posts')
            .done(function(data) {
                displayResults('#getResults', data);
            })
            .fail(function(error) {
                console.error('Error fetching data:', error);
                displayResults('#getResults', { error: 'An error occurred while fetching data.' });
            });
    });

    // POST 请求表单
    $('#postForm').on('submit', function(event) {
        event.preventDefault();
        const title = $('#title').val();
        const body = $('#body').val();
        const userId = $('#userId').val();

        const postData = {
            title: title,
            body: body,
            userId: userId
        };

        $.ajax({
            url: 'https://jsonplaceholder.typicode.com/posts',
            type: 'POST',
            data: JSON.stringify(postData),
            contentType: 'application/json; charset=UTF-8',
            success: function(data) {
                displayResults('#postResults', data);
            },
            error: function(error) {
                console.error('Error posting data:', error);
                displayResults('#postResults', { error: 'An error occurred while posting data.' });
            }
        });
    });

    // 显示结果的函数
    function displayResults(selector, data) {
        $(selector + ' .card-text').empty();
        if (Array.isArray(data)) {
            data.forEach(item => {
                $(selector + ' .card-text').append(`ID: ${item.id}<br>`);
                $(selector + ' .card-text').append(`Title: ${item.title}<br>`);
                $(selector + ' .card-text').append(`Body: ${item.body}<br>`);
                $(selector + ' .card-text').append(`User ID: ${item.userId}<br>`);
                $(selector + ' .card-text').append('<hr>');
            });
        } else {
            for (let key in data) {
                $(selector + ' .card-text').append(`${key}: ${data[key]}<br>`);
            }
        }
    }
});