读取网页图片

import java.awt.image.BufferedImage;import java.io.File;import java.io.InputStream;import java.net.URL;import java.net.URLConnection;import java.util.HashMap;import java.util.Map;import javax.imageio.ImageIO;import org.apache.log4j.Logger;public class ConnTest {private static Logger logger = Logger.getLogger(ConnTest.class);public static void main(String[] args) {Map<String, Object> map = null;ConnTest connTest = new ConnTest();String picUrl = "http://img.alicdn.com/bao/uploaded/i4/1039969019/TB2Oso2cDMlyKJjSZFFXXalVFXa_!!1039969019.jpg_430x430q90.jpg"; try {map = connTest.getUrlPicLR_try2(picUrl); } catch (Exception e) {//第一次“获取网络连接图片的长宽及图片名”失败后，尝试第二次 e.printStackTrace();logger.info("第一次“获取网络连接图片的长宽及图片名”失败,下面开始尝试第二次：");try {Thread.sleep(2*1000);logger.info("================》当前线程睡2秒");map = connTest.getUrlPicLR_try2(picUrl);} catch (Exception e1) {logger.info("很遗憾！第二次“获取网络连接图片的长宽及图片名”也失败，将不再尝试");} } System.out.println(map.get("picName"));//如果两次“获取网络连接图片的长宽及图片名”均失败，则返回null System.out.println(map.get("width")); System.out.println(map.get("height"));}public Map<String, Object> getUrlPicLR_try2(String picUrl) throws Exception{ Map<String, Object> map = new HashMap<>(); URL url = null;       InputStream is = null;       BufferedImage img = null;     File picture = new File(picUrl);     String picName = picture.getName(); map.put("picName", picName);     try {       url = new URL(picUrl);      // 打开连接     URLConnection con = url.openConnection();     System.err.println("打开连接成功");     con.setConnectTimeout(10000);//链接时间     con.setReadTimeout(10000);     // 输入流     is = con.getInputStream();         //is = url.openStream();           img = ImageIO.read(is);                       if(img!=null){           int width =  img.getWidth();         map.put("width", width);         int height = img.getHeight();         map.put("height", height);         }else{           System.out.println("图片不存在！");           }       } catch (Exception e) {     e.printStackTrace();     map = null;     }  finally {           try {         is.close();         if(map == null) {         throw new Exception("关流成功，流读取失败");         }         } catch (Exception e) {           throw new Exception("关流失败");         }     }   return map; }}

上述是将图片从网页上读取图片，下面是切割图片

public String picCut(String url){SimpleDateFormat YYYY = new SimpleDateFormat("yyyy");SimpleDateFormat MM = new SimpleDateFormat("MM");SimpleDateFormat dd = new SimpleDateFormat("dd");Long nowTime = System.currentTimeMillis();String year = YYYY.format(nowTime);String month = MM.format(nowTime);String day = dd.format(nowTime);String now = year+"\\"+month+"\\"+day;  File picture = new File(url);       BufferedImage sourceImg;     String arrurl = "";     try {sourceImg = ImageIO.read(new FileInputStream(picture));int width =  sourceImg.getWidth();int height = sourceImg.getHeight();        FileInputStream is = null;          ImageInputStream iis = null;          try {              // 读取图片文件              is = new FileInputStream(url);                Iterator<ImageReader> it = ImageIO                      .getImageReadersByFormatName(url.substring(url.length()-3));                ImageReader reader = it.next();                // 获取图片流              iis = ImageIO.createImageInputStream(is);                           reader.setInput(iis, true);                            ImageReadParam param = reader.getDefaultReadParam();                          Rectangle rect = new Rectangle(0, 0, width, (int) ((int)height*0.8));                              param.setSourceRegion(rect);                            BufferedImage bi = reader.read(0, param);                // 保存新图片             if(!(new File("D:\\en_US1\\pic\\"+now)).exists()){            (new File("D:\\en_US1\\pic\\"+now)).mkdirs();                System.out.println("创建目录为："+(new File("D:\\en_US1\\pic\\"+now)));                Thread.sleep(500);            }            ImageIO.write(bi, url.substring(url.length()-3), new File(url.replace("C:", "D:")));                    } finally {              if (is != null)                is.close();              if (iis != null)            iis.flush();                iis.close();          }  } catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();System.out.print("====================图片读取失败");}     System.out.println("===========================图片剪切完成");    return url.replace("C:", "D:"); }

从网页上下载图片

//根据图片URL将图片下载到本地 public String downPic(String picUrl){ SimpleDateFormat YYYY = new SimpleDateFormat("yyyy");SimpleDateFormat MM = new SimpleDateFormat("MM");SimpleDateFormat dd = new SimpleDateFormat("dd");Long nowTime = System.currentTimeMillis();String year = YYYY.format(nowTime);String month = MM.format(nowTime);String day = dd.format(nowTime);String now = year+"\\"+month+"\\"+day;  String bUrl = null; try { URL url = new URL(picUrl);  // 打开连接 URLConnection con = url.openConnection(); con.setConnectTimeout(10000);//链接时间 con.setReadTimeout(10000);  // 输入流 InputStream is = con.getInputStream();          DataInputStream dataInputStream = new DataInputStream(is);           String imageName = this.getUrlPicLR(picUrl).get("picName").toString();         if(!(new File("C:\\en_US1\\pic\\"+now)).exists()){         (new File("C:\\en_US1\\pic\\"+now)).mkdirs();                System.out.println("创建目录为："+(new File("C:\\en_US1\\pic\\"+now)));                Thread.sleep(500);            }         FileOutputStream fileOutputStream = new FileOutputStream(new File("C:\\en_US1\\pic\\"+now+"\\"+imageName));                    byte[] buffer = new byte[1024];           int length;           while ((length = dataInputStream.read(buffer)) > 0) {               fileOutputStream.write(buffer, 0, length);           }                    dataInputStream.close();          fileOutputStream.flush();         fileOutputStream.close();         bUrl = ("C:\\en_US1\\pic\\"+now+"\\"+imageName);} catch (Exception e) {// TODO: handle exceptione.printStackTrace();logger.error("===================图片下载失败");}  System.out.print(picUrl+"===============下载成功");  return bUrl; }