HttpClient download picture

package com.ttpod.httpclient;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import org.apache.http.HttpEntity;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

/**

 * @className:DownloadFile.java

 * @classDescription:

 * @author:qiuchen

 * @createTime:2012-6-6

 */

public class DownloadFile {

/**

* 从url中下载资源

* @author:qiuchen

* @createTime:2012-6-6

* @param url 图片资源地址

* @param saveDir 保存磁盘,

* @return

* @throws IOException 

*/

public static boolean downLoadFile(String url) throws IOException{

//从url中获取文件名

String fileName = getFileNameByUrl(url);

String savePath = "F:\\"+fileName;

System.out.println(savePath);

// 执行请求的客户端

HttpClient client = new DefaultHttpClient(); 

// Http Get 请求

HttpGet get = new HttpGet(url);

// 获得服务器响应的所有信息

HttpResponse response = null;

try {

response = client.execute(get);

int state = response.getStatusLine().getStatusCode();

System.out.println(state);

if(state == HttpStatus.SC_OK){ //状态码=200

// 获得服务器响应的信息(除head部分,源代码中是看不到的)

HttpEntity entity = response.getEntity();

System.out.println("fileLength:"+entity.getContentLength());

System.out.println(entity);

//获取输入流

InputStream input = entity.getContent();

//定义输出文件(文件格式要和资源匹配)

FileOutputStream bout = new FileOutputStream(savePath);

byte[] buffer = new byte[1024 * 100000];

int read = 0;

while ((read = input.read(buffer)) > 0) {

bout.write(buffer,0,read);

System.out.println(read);

}

input.close(); // 关闭输入流

bout.close(); //关闭输出流

System.out.println("download success");

}else{

System.out.println("read error");

}

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally{

client.getConnectionManager().shutdown();

}

return true;

}

public static void main(String[] args) {

String url = "http://www.360desk.net/Wallpaper/2010222840dog.jpg";

try {

downLoadFile(url);

} catch (IOException e) {

e.printStackTrace();

}

}

/**

* 从url地址中获取文件名

* @author:qiuchen

* @createTime:2012-6-12

* @param url

* @return 

*/

public static String getFileNameByUrl(String url){

int lastNo = url.lastIndexOf("/");  //最后一个"/"的索引

if(url.substring(lastNo).lastIndexOf(".")==-1){ //one webpage

return url;

}else{

if("".equals(url.substring(url.lastIndexOf("/")+1,url.lastIndexOf(".")))){

getFileNameByUrl(url.substring(0,url.lastIndexOf("/")));

}else{

return url.substring(url.lastIndexOf("/")+1);

}

}

return url;

}

}