下面是自己编写的 网络抓取功能实现 将获取的结果进行过滤并写入到TXT文档中 （以防忘记） 原创哟

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class WebClient4 {
public static String getWebContent(String urlString, final String charset,
int timeout) throws IOException {
if (urlString == null || urlString.length() == 0) {
return null;
}
urlString = (urlString.startsWith("http://") || urlString
.startsWith("https://")) ? urlString : ("http://" + urlString)
.intern();
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn
.setRequestProperty(
"User-Agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727)");
conn.setRequestProperty("Accept", "text/html");
conn.setConnectTimeout(timeout);
try {
if (conn.getResponseCode() != HttpURLConnection.HTTP_OK) {
return null;
}
} catch (IOException e) {
e.printStackTrace();
return null;
}
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input, charset));
String line = null;
StringBuffer sb = new StringBuffer();
while ((line = reader.readLine()) != null) {
sb.append(line).append("\r\n");
}
if (reader != null) {
reader.close();
}
if (conn != null) {
conn.disconnect();
}
return sb.toString();

}

public static String getWebContent(String urlString) throws IOException {
return getWebContent(urlString, "iso-8859-1", 5000);
}

// public static void main(String[] args) throws IOException {
// String s = getWebContent("http://music.baidu.com/top/new");
// s = new String(s.getBytes("iso-8859-1"), "utf-8");
// System.out.println("开始");
// String regex="<span.*?><a.*?>(.*?)</a></span>";
// Pattern p =Pattern.compile(regex);
// Matcher m=p.matcher(s);
// while(m.find()){
// System.out.println(m.group(1));
// }
// System.out.println("结束");
//// System.out.println(s);
// }

public static void main(String[] args) throws IOException {
System.out.println("开始");

// 这里为要变更你自己需要抓取的网络地址
// String s = getWebContent("http://music.baidu.com/top/new");
String s = getWebContent("http://music.baidu.com/top/new/week/");

// 这里的字体设置是 将页面的IOS-8859-1 转换为UTF-8 编码格式 方便后面将查询出的数据写入到txt文档中
s = new String(s.getBytes("iso-8859-1"), "utf-8");
// System.out.println(s);

// 第一种方式  这是获取本页面上的过滤条件
// String regex="<a href=http:///"/song/.*?\\\" title=\\\"(.*?)\\\">";
// 第二种方式 这是获取本页面上的过滤条件
String regex="<a class=\\\"song-link\\\" href=http:///"/song/.*?\\\" title=\\\"(.*?)\\\">";

// Pattern 和 Matcher 为正则表达式的方法  为设置过滤条件
Pattern p =Pattern.compile(regex);
Matcher m=p.matcher(s);
String line2 = null;

// 定义StringBuffer 用来存储字符串方便后期写入文档
StringBuffer sb2 = new StringBuffer();
while(m.find())

// 打印出满足条件的数据
System.out.println(m.group(1));

line2 = m.group(1);
sb2.append(line2).append("\r\n");
}
wirteString("F:/cc2.txt",sb2.toString());
// System.out.println(s);
System.out.println("结束");
}

/* 往文件写入字符串 */
public static void wirteString(String path, String context) {
try {
/* 创建写入对象 */
FileWriter fileWriter = new FileWriter(path);
/* 创建缓冲区 */
BufferedWriter writer = new BufferedWriter(fileWriter);
/* 写入字符串 */
writer.write(context);
/* 关掉对象 */
writer.close();
System.out.println("写入字符串成功！");
} catch (IOException e) {
e.printStackTrace();
}
}

/* 将对象写入文件方法 */
public void write(Object o, String path) {
try {
/* 创建存取文件 */
FileOutputStream fileStream = new FileOutputStream(path);
/* 将存取文件写入对象 */
ObjectOutputStream os = new ObjectOutputStream(fileStream);
/* 写入对象 */
os.writeObject(o);
System.out.println("写入数据成功");
/* 关闭ObjectOutputStream */
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}