readdatafile.java

来自「java的一系列产品中包括jsme,jmse,j2ee,本文件提供j2ee实现的」· Java 代码 · 共 63 行

import Java.io.*;
import Java.lang.*;
import Java.string.*;
import Java.util.*;

public class ReadDataFile{
	private String currentRecord = null;
	private BufferedReader file;
	private String path;
	private StringTokenizer token;
	//创建文件对象
	public ReadDataFile(){
		file = new BufferedReader(new InputStreamReader(System.in),1);
	}
	
	public ReadDataFile(String filePath) throws FileNotFoundException{
		path = filePath;
		file = new BufferedReader(new FileReader(path));
	}
	//设置文件路径
	public void setPath(String filePath){
		path = filePath;
		try {
			file = new BufferedReader(new FileReader(path));
		}catch (FileNotFoundException e) {
			System.out.println("file not found");
		}
	}
	
	//得到文件路径
	public String getPath(){
		return path;
	}
	
	//关闭文件
	public void fileClose() throws IOException{
		file.close();
	}
	
	//读取下一行记录，若没有则返回-1
	public int nextRecord(){
		int returnInt = -1;
		try {
			currentRecord = file.readLine();
		}catch (IOException e){
			System.out.println("readLine problem, terminating.");
		}
		if(currentRecord == null)
			returnInt = -1;
		else{
			token = new StringTokenizer(currentRecord);
			returnInt = token.countTokens();
		}
		
		return returnInt;
	}
	
	//以字符串的形式返回整个记录
	public String returnRecord(){
		return currentRecord;
	}
}