java截取网址路径到指定目录。并改写路径地址？
1?你想把src里面的jpg图片保存到本地某个目录路径里面
2?你再把你保存的这个目录路径设置回去
3?抓取网页图片
import?java.io.BufferedReader;
import?java.io.File;
import?java.io.FileOutputStream;
import?java.io.InputStream;
import?java.io.InputStreamReader;
import?java.io.OutputStream;
import?java.net.URL;
import?java.net.URLConnection;
import?java.util.ArrayList;
import?java.util.Calendar;
import?java.util.List;
import?java.util.regex.Matcher;
import?java.util.regex.Pattern;
import?com.sun.xml.internal.fastinfoset.stax.events.Util;
public?class?CatchPicture?{
public?static?void?main(String[]?args)?{
//?TODO?Auto-generated?method?stub
//定义抓取图片的?正则表达式
String?regular="[*]<b>.*?</b><br/><img?src=\"(.*?)\"?border=0?alt=\'(.*?)\'?style=\".*?\"?class=\".*?\">
";
List<Picture>?list=new?CatchPicture().lookWeiboPic("/GrapHtml/dongtai/20120921221658.htm","GBK",regular,"2,1");
System.out.println(list.size());
}
//根据URL查看网站上的图片
public?List<Picture>?lookWeiboPic(String?url,String?charset,String?regular,String?attIndex){
List<Picture>?list=new?ArrayList<Picture>();
try?{
//获取填写的url
//判断所属网站?获取?正则表达式
//获取图片存放到?list集合
if(!Util.isEmptyString(url)){
String?htmls?=?getPageSource(url.trim(),charset);
Pattern?pattern?=null;
pattern?=?Pattern.compile(regular.trim());
if(!Util.isEmptyString(htmls)){
Matcher?matcher?=?pattern.matcher(htmls);
//得到参数属性顺序
String[]?sort?=?regular.trim().split(",");?//下标：0?表示?标题title?，?1?表示?图片路径?
//判断后缀后?得到网站的请求头部?");
String?";
}?else?{
suffix?=?url.trim().split("com");
";
}
//循环匹配找到的
while(matcher.find()){
Picture?picture=new?Picture();
//匹配出title
if?(-1?==?Integer.parseInt(sort[0]))?{
//?页面上抓不到标题
picture.setTitle("");
}?else?{
//?去标题的#
String?title=matcher.group(Integer.parseInt(sort[0])).replace("#",?"?");
picture.setTitle(title);
}
//匹配出source
if?(-1?==?Integer.parseInt(sort[1]))?{
//?页面上抓不到图片路径
picture.setSource("");
}else{
String?webImgUrl=matcher.group(Integer.parseInt(sort[1]));
//判断是绝对路径还是相对路径
String[]?pathType=webImgUrl.split(":");
if(pathType.length>1){
//绝对路径
picture.setSource(webImgUrl);
}else{
//判断相对路径是否含有..
pathType=webImgUrl.split("\\.\\.");
if(pathType.length>1){
picture.setSource(httphread+pathType[1]);
}else{
if(webImgUrl.startsWith("/")){
picture.setSource(httphread+pathType[0]);
}else{
picture.setSource(httphread+"/"+pathType[0]);
}
}
}
}
String?upPath=upload(picture.getSource(),"d:\\image\\");
picture.setUpPath(upPath);
list.add(picture);
}//--end?while
}
}
}catch?(Exception?e)?{
e.printStackTrace();
}
return?list;
}?
/**
?*?根据网路路径获取?页面源码
?*?@param?pageUrl
?*?@param?encoding
?*?@return
?*/
public?String?getPageSource(String?pageUrl,String?encoding)?{
StringBuffer?sb?=?new?StringBuffer();
try?{
//构建一URL对象
URL?url?=?new?URL(pageUrl);
//使用openStream得到一输入流并由此构造一个BufferedReader对象
BufferedReader?in?=?new?BufferedReader(new?InputStreamReader(url
.openStream(),?encoding));
String?line;
//读取www资源
while?((line?=?in.readLine())?!=?null)?{
sb.append(line);
sb.append("\n");
}
in.close();
}?catch?(Exception?ex)?{
System.err.println(ex);
}
return?sb.toString();
}?
/**
?*?上传?图片?
?*?@param?urlStr
?*?@param?path
?*?@return
?*?@throws?Exception?
?*/
public?String?upload(String?urlStr,String?path)?throws?Exception{
Calendar?calendar?=?Calendar.getInstance();
String?month?=?calendar.get(Calendar.YEAR)?+?"/"
+?(calendar.get(Calendar.MONTH)?+?1);
String?filename?=?java.util.UUID.randomUUID().toString()
+?getExtension(urlStr);
path?=path?+?month?+?"/";
download(urlStr,path,filename);
return?path+month?+?"/"?+?filename;
}
/**
?*?根据路径?下载图片?然后?保存到对应的目录下
?*?@param?urlString
?*?@param?filename
?*?@param?savePath
?*?@return
?*?@throws?Exception
?*/
public?void?download(String?urlString,?String?filename,String?savePath)?throws?Exception?{
//?构造URL
URL?url?=?new?URL(urlString);
//?打开连接
URLConnection?con?=?url.openConnection();
//设置请求的路径
con.setConnectTimeout(5*1000);
//?输入流
InputStream?is?=?con.getInputStream();
//?1K的数据缓冲
byte[]?bs?=?new?byte[1024];
//?读取到的数据长度
int?len;
//?输出的文件流
?File?sf=new?File(savePath);
?if(!sf.exists()){
?sf.mkdirs();
?}
?OutputStream?os?=?new?FileOutputStream(sf.getPath()+"\\"+filename);
//?开始读取
while?((len?=?is.read(bs))?!=?-1)?{
os.write(bs,?0,?len);
}
//?完毕，关闭所有链接
os.close();
is.close();
}?
/**
*?根据文件名?获取文件的后缀名 *?@param?fileUrl *?@return */ public?String?getExtension(String?fileUrl){?return?fileUrl.substring(fileUrl.lastIndexOf("."),?fileUrl.length());
}}