获取分解类型

private String parserFileType(String fileTrueName){
		String file_type = null;
		int begin = 0;
		int begin_tmp = 0;
		while((begin = fileTrueName.indexOf("." , begin + 1)) > -1){
			begin_tmp = begin;
		}		
		file_type = fileTrueName.substring(begin_tmp + 1);
		
		return file_type;
	}

 

public static void main(String[] args) throws Exception {
		StAXTest test = new StAXTest();//StAXTest为类名		

		System.out.println(test.parserFileType("stt.txt.pdf.html"));
	}