using System;        using System.Collections.Generic;        using System.ComponentModel;        using System.Data;        using System.Drawing;        using System.IO;        using System.Linq;        using System.Net;        using System.Text;        using System.Threading;        using System.Threading.Tasks;        using System.Windows.Forms;        using Newtonsoft.Json;        using Newtonsoft.Json.Linq;                namespace 图片下载器 {            public partial class Form1 : Form {                private string dir;                public Form1() {                    Control.CheckForIllegalCrossThreadCalls = false;//这种方法不推荐使用，即不检查跨线程操作，应该使用委托的                    InitializeComponent();                }                        private void butSelect_Click(object sender , EventArgs e) {                    FolderBrowserDialog dlg = new FolderBrowserDialog();                    if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK) {                        textDir.Text = dlg.SelectedPath;                            }                }                public static int pagecount = 1;                private void Showpages() {                    this.textShow.AppendText("目前正在下载第" + pagecount + "页\n");                }                private void butStart_Click(object sender , EventArgs e) {                    string key = textKeyWords.Text;                    if (string.IsNullOrEmpty(key)) {//检测关键字                        MessageBox.Show("请输入关键词！");                        return;                    }                    if (string.IsNullOrEmpty(textDir.Text)) {//检测路径                        MessageBox.Show("请选择路径！");                        return;                    }                    dir = textDir.Text;                    if (!dir.EndsWith("\\")) {                        dir = dir + "\\";                    }                    Thread thread = new Thread(() => {//启动一个新线程                        process(key);                    });                    thread.Start();//线程启动                }                        private void process(string key) {                    int count = (int)numericUpDown.Value;//请求的页面数量                    for (int i = 0 ; i < count ; i++) {                        pagecount = i + 1;                        Showpages();                        HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://image.baidu.com/search/avatarjson?tn=resultjsonavatarnew&ie=utf-8&word=" + Uri.EscapeUriString(key) + "&cg=girl&pn=" + (i + 1) * 60 + "&rn=60&itg=0&z=0&fr=&width=&height=&lm=-1&ic=0&s=0&st=-1&gsm=360600003c");                        using (HttpWebResponse res = (HttpWebResponse)req.GetResponse()) {                            if (res.StatusCode == HttpStatusCode.OK) {                                using (Stream stream = res.GetResponseStream()) {                                    try {                                        download(stream);                                    } catch (Exception e) {                                        textShow.BeginInvoke(new Action(() => {                                            textShow.AppendText(e.Message + Environment.NewLine);                                        }));                                    }                                }                            } else {                                MessageBox.Show("获取第" + i + "页失败！" + res.StatusCode);                            }                        }                    }                }                        private void download(Stream stream) {                    using (StreamReader reader = new StreamReader(stream)) {                        string json = reader.ReadToEnd();                        JObject objRoot = (JObject)JsonConvert.DeserializeObject(json);                        JArray imgs = (JArray)objRoot["imgs"];                        for (int j = 0 ; j < imgs.Count ; j++) {                            JObject img = (JObject)imgs[j];                            string objUrl = (string)img["objURL"];//http://hibiadu....../1.jpg                            // textShow.AppendText(objUrl + Environment.NewLine);                            //保存的路径是：destDir；                            try {                                DownloadImage(objUrl);//避免一个方法中的代码过于复杂                            } catch (Exception ex) {                                //子线程的代码中操作界面控件要使用BeginInvoke                                textShow.BeginInvoke(new Action(() => {                                    textShow.AppendText(ex.Message + Environment.NewLine);                                }));                            }                        }                    }                }                private void DownloadImage(string objUrl) {                    //得到保存的路径                    string path = Path.Combine(dir , Path.GetFileName(objUrl));                    HttpWebRequest req = (HttpWebRequest)WebRequest.Create(objUrl);                    req.Referer = "http://image.baidu.com/";//欺骗网站服务器这是从百度图片发出的                    using (HttpWebResponse res = (HttpWebResponse)req.GetResponse()) {                        if (res.StatusCode == HttpStatusCode.OK) {                            using (Stream stream = res.GetResponseStream())                            using (Stream filestream = new FileStream(path , FileMode.Create)) {                                stream.CopyTo(filestream);                            }                        } else {                            throw new Exception("下载失败" + res.StatusCode);                        }                    }                }            }        }  

百度网盘下载： http://pan.baidu.com/s/1kT3YzXl密码: gafi

来自：http://blog.csdn.net/jtahstu/article/details/48109555