jsp文件系统

属性	方法
获取根目录	request.getServletContext().getRealPath("/");
创建目录	File file= new File(path); if(!file.exists()){ file.mkdirs(); }
写文件	File file =new File("文件路径"); OutputStreamWriter osw =new OutputStreamWriter(new FileOutputStream(file,"是否追加"),"字符编码"); osw.write("写入内容"); osw.flush(); osw.close();
读文件	File file =new File("文件路径"); InputStreamReader isr=new InputStreamReader(new FileInputStream(file),"字符编码"); StringBuider sb= new StringBuider(); while(isr.ready()){ sb.append((char)isr.read()); } isr.close();
删除文件	File file =new File("path");//有没有引号 file.delete();
静态化技术	URL url =new URL ("htpp://www.rsseasy.com"); HttpURLConnection connection =(HttpURLConnection)url.openConnection(); BufferedReader in =new BufferedReader(new InputStreanReader(connection.getInputStream(),"utf-8")); StringBuffer buffer =new StringBuffer(); String line = ""; while((line=in.readLine())!=null){ buffer.append(line); } File file =new File("path"); OutputStreamWrite osw =new OutputStreamWrite(new FileOutputStream(file,file),"utf-8"); osw.write(buffer.toString()); osw.flush(); osw.close();

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