读取文件

//read xml file
	public StringBuffer outputFile(String path){
		StringBuffer xml = new StringBuffer();
		BufferedReader br = null;
		try {
			br = new BufferedReader(new FileReader(path));
			String data = br.readLine();//一次读入一行，直到读入null为文件结束  
			
			while( data!=null){  
			    xml.append(data); 
			    data = br.readLine(); //接着读下一行  
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		return xml;
	}