JAVA文件读取和解析

前面两种可以设置编码格式。

1.第一种：xml文件的读取和Sax解析

InputSource inputSource = new InputSource(new FileInputStream(file));

inputSource.setEncoding("UTF-8");

List<Map<String, String>> list = reader.getList(file);

public static List<Map<String, String>> getList(File file) throws Exception{

InputSource inputSource = new InputSource(new FileInputStream(file));

inputSource.setEncoding("UTF-8");

SAXParserFactory sf = SAXParserFactory.newInstance();

SAXParser sp = sf.newSAXParser();

XML_LOG_READ_OUT reader = new XML_LOG_READ_OUT();

sp.parse(inputSource, reader);

return reader.getList();

}

2.第二种：TXT文件读取和解析

InputStreamReader read = new InputStreamReader(new FileInputStream(file),"UTF-8");

BufferedReader br= new BufferedReader(read);//BufferedReader读取文件

String s = null;

int i = 0;

while((s = br.readLine()) != null){

if(i > 0){

Map<String, String> map = new HashMap<String, String>();

String[] str = s.split("\t");//根据tab键划分

}

}

i++;

}

br.close();

}

3,第三种txt文件读取

BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件

String s = null;

int i = 0;

while((s = br.readLine())!=null){//使用readLine方法，一次读一行

if(i>0){

String[] str = s.split("\t");

String time = str[0].replace("/", "-");

SimpleDateFormat sdfInput = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

Date date = sdfInput.parse(time);

result.append(System.lineSeparator()+"时间是："+sdfInput.format(date));

}

i++;

}

br.close();

}