java抓取网络图片放到本地

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class GetContentPicture {
// 得到了图片地址并下载图片
public void getHtmlPicture(String httpUrl) {
URL url;
BufferedInputStream in;
FileOutputStream file;
int count; // 图片文件名序号
FileNumber num = new FileNumber();// 图片文件名序号类，num为对象
count = num.NumberReadFromFile();// 获取图片文件序号
try {
System.out.println("获取网络图片");
String fileName = (String.valueOf(count)).concat(httpUrl
.substring(httpUrl.lastIndexOf(".")));// 图片文件序号加上图片的后缀名，后缀名用了String内的一个方法来获得
// httpUrl.substring(httpUrl.lastIndexOf("/"));//这样获得的文件名即是图片链接里图片的名字
String filePath = "d:/photos/cc/";// 图片存储的位置
url = new URL(httpUrl);

in = new BufferedInputStream(url.openStream());

file = new FileOutputStream(new File(filePath + fileName));
int t;
while ((t = in.read()) != -1) {
file.write(t);
}
file.close();
in.close();
System.out.println("图片获取成功");
count = count + 1;// 图片文件序号加1
num.NumberWriteToFile(count);// 将图片名序号保存
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

// 获取网页的代码保存在String格式的Content中
public String getHtmlCode(String httpUrl) throws IOException {
String content = "";
URL uu = new URL(httpUrl); // 创建URL类对象
BufferedReader ii = new BufferedReader(new InputStreamReader(uu
.openStream())); // //使用openStream得到一输入流并由此构造一个BufferedReader对象
String input;
while ((input = ii.readLine()) != null) { // 建立读取循环，并判断是否有读取值
content += input;
}
ii.close();
return content;
}

// 分析网页代码，找到匹配的网页图片地址
public void get(String url) throws IOException {

String searchImgReg = "(?x)(src|SRC|background|BACKGROUND)=('|\")/?(([\\w-]+/)*([\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";// 用于在网页代码Content中查找匹配的图片链接。
String searchImgReg2 = "(?x)(src|SRC|background|BACKGROUND)=('|\")(http://([\\w-]+\\.)+[\\w-]+(:[0-9]+)*(/[\\w-]+)*(/[\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";

String content = this.getHtmlCode(url);// this指对象gcp，在此地调用获取网页代码，getHtmlCode方法
// System.out.println(content); //输出的content将是一个连续的字符串。

Pattern pattern = Pattern.compile(searchImgReg);// java.util.regex.Pattern
Matcher matcher = pattern.matcher(content); // java.util.regex.Matcher
while (matcher.find()) {
System.out.println(matcher.group(3));// 输出图片链接地址到屏幕
// System.out.println(url);
this.getHtmlPicture(matcher.group(3));// 对象调用getHtmlPicture从网上下载并输出图片文件到指定目录
}

pattern = Pattern.compile(searchImgReg2);
matcher = pattern.matcher(content);
while (matcher.find()) {
System.out.println(matcher.group(3));
this.getHtmlPicture(matcher.group(3));
}
// searchImgReg =
// "(?x)(src|SRC|background|BACKGROUND)=('|\")/?(([\\w-]+/)*([\\w-]+\\.(jpg|JPG|png|PNG|gif|GIF)))('|\")";
}

// 主函数url网页的地址
public static void main(String[] args) throws IOException {
String url = "http://www.baidu.com";
GetContentPicture gcp = new GetContentPicture();
gcp.get(url);

}
}

import java.io.*;

//图片文件名，需要在文件名序号TXT文件保存地址建立一个number.txt并写入1保存；

public class FileNumber {
// 文件写
public void NumberWriteToFile(int x) {
int c = 0;
c = x;
File filePath = new File("d:/photos/cc");
File f1 = new File(filePath, "number.txt");
try {
FileOutputStream fout = new FileOutputStream(f1);
DataOutputStream out = new DataOutputStream(fout);
out.writeInt(c);

} catch (FileNotFoundException e) {
System.err.println(e);
} catch (IOException e) {
System.err.println(e);
}

}

// 文件读
public int NumberReadFromFile() {
int c1 = 0;
File filePath = new File("d:/photos/cc");
File f1 = new File(filePath, "number.txt");
try {
FileInputStream fin = new FileInputStream(f1);
DataInputStream in = new DataInputStream(fin);
c1 = in.readInt();
System.out.println(c1);// 输出文件内容至屏幕
} catch (FileNotFoundException e) {
System.err.println(e);
} catch (IOException e) {
System.err.println(e);
}
return c1;
}

public static void main(String args[]) {

}
}