java多线程下载网络图片

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class ImageDown {
 /**
  * 下载图片
  * @param str
  */
 public static void downImage(String str) {
  BufferedInputStream input = null;
  BufferedOutputStream out = null;
  URL url;
  try {
   url = new URL(str);
   URLConnection conn;
   conn = url.openConnection();
   String[] strName = str.split("/");
   String imageName = strName[strName.length - 1]; // 图片名
   String imageUrl = "D:/" + imageName;
   InputStream in = conn.getInputStream();
   input = new BufferedInputStream(in);
   out = new BufferedOutputStream(new FileOutputStream(imageUrl));
   int len = 0;
   while ((len = input.read()) != -1) {
    out.write(len);
   }
  } catch (MalformedURLException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   if (out != null) {
    try {
     out.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }

if (input != null) {
    try {
     input.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
 }
 
 
 
 /**
  * 获取路径
  * @return
  */
 public static ArrayList<String> getUrl(){
  ArrayList<String> list= new ArrayList<String>();
  BufferedReader read=null;
  try {
   URL url = new URL("http://www.tupianzj.com/chuangyi/");
   URLConnection conn = url.openConnection();
   InputStream input = conn.getInputStream();
   read = new BufferedReader(new InputStreamReader(input));//字符转换成字节
   //http://img.tupianzj.com/uploads/allimg/160525/9-1605251F6280-L.jpg
   Pattern pattern = Pattern.compile("http://\\w+\\.\\w+\\.com/\\w+/\\w+/\\d+/[0-9]-(\\w+\\d+|\\d+\\w+)([-][A-Z]\\.jpg|\\.jpg)");
   String str=null;
   while((str=read.readLine())!=null){
    Matcher match = pattern.matcher(str);
    if (match.find()) {
     String imageUrl = match.group();
     list.add(imageUrl);
    }
   }
  } catch (MalformedURLException e) {
   e.printStackTrace();
  }catch (IOException e) {
   e.printStackTrace();
  }finally{
   if (read!=null) {
    try {
     read.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
  return list;
 }
}

/**
 * 开启多线程
 * @author Administrator
 *
 */
class downimage extends Thread{
 String str;
 public downimage(String str){
  this.str=str;
 }
 @Override
 public void run() {
  BufferedInputStream input = null;
  BufferedOutputStream out = null;
  URL url;
  try {
   url = new URL(str);
   URLConnection conn;
   conn = url.openConnection();
   String[] strName = str.split("/");
   String imageName = strName[strName.length - 1]; // 图片名
   String imageUrl = "D:/" + imageName;
   InputStream in = conn.getInputStream();
   input = new BufferedInputStream(in);
   out = new BufferedOutputStream(new FileOutputStream(imageUrl));
   int len = 0;
   while ((len = input.read()) != -1) {
    out.write(len);
   }
  } catch (MalformedURLException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } finally {
   if (out != null) {
    try {
     out.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
   if (input != null) {
    try {
     input.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   }
  }
 }
}