简单的页面静态化

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MakeHtml {

public static void main(String[] args){
MakeHtml maker = new MakeHtml();
maker.writeHtml("F:\\c\\sina.html","http://www.google.cn/search?hl=zh-CN&source=hp&q=a&btnG=Google+%E6%90%9C%E7%B4%A2","gb2312");

}

public  String getHtml(String httpUrl,String code){
StringBuffer htmlBuffer = new StringBuffer();
try {
//建立资源
URL url = new URL(httpUrl);
//打开连接
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestProperty("User-Agent","Mozilla/4.0");
connection.connect();
//打开的连接读取的输入流
InputStream in = connection.getInputStream();
//从字符输入流中读取文本，缓冲各个字符，从而提供字符、数组和行的高效读取。
BufferedReader buf = new BufferedReader(new InputStreamReader(in,code));
String currentLine = "";
while((currentLine=buf.readLine())!=null){
htmlBuffer.append(currentLine+"\n");
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return htmlBuffer.toString();
}



public synchronized void writeHtml(String filePath,String httpUrl,String code){
Writer writer = null;
    
String tempPathFile = filePath.substring(0,filePath.indexOf("."))+"_temp"+filePath.substring(filePath.indexOf("."));
  File writerFile = new File(tempPathFile);

  boolean existFlag = writerFile.exists();
 
  //目录不存在则生成目录
  if(!writerFile.isDirectory()){
  File dir = writerFile.getParentFile();
  if(!dir.exists()){
  dir.mkdirs();
  }
 
  }
  //文件存在，则删除文件重建
  if(existFlag){
  writerFile.delete();
  }
 
  try {
//建立新的文件
writerFile.createNewFile();
//输出
writer = new OutputStreamWriter(new FileOutputStream(tempPathFile), code);
writer.write(getHtml(httpUrl,code));
writer.close();

//检查原来的文件是否存在，存在，则删除，将零时文件重命名为旧的文件名，否则，直接重命名
File oldFile = new File(filePath);
boolean oldFileExist = oldFile.exists();
if(oldFileExist){
oldFile.delete();
}
writerFile.renameTo(oldFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}finally{
if(writer!=null){
try {
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}

}

}