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java 按行读取文件

2015-07-11 17:56 585 查看
package cn.com.yy.controller;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class ReadFromTXTFile {

	public static void main(String[] args) {
		
		String filePath = "D:/test.txt";
		read1(filePath);
		read2(filePath);
	}
	
	/**
	 * READ FILE
	 * @param filePath
	 */
	public static void read1(String filePath){
		System.out.println("------first method-------");
		File file = new File(filePath);
		if(file.exists()){
			InputStreamReader reader;
			BufferedReader br;
			try {
				reader = new InputStreamReader(new FileInputStream(file));
				br = new BufferedReader(reader);
				String lineContent = null;
				while((lineContent = br.readLine())!=null){
					System.out.println(lineContent);
				}
				br.close();
				reader.close();
			} catch (FileNotFoundException e) {
				System.out.println("no this file");
				e.printStackTrace();
			} catch (IOException e) {
				System.out.println("io exception");
				e.printStackTrace();
			}
		}
	}
	
	/**
	 * READ FILE
	 * @param filePath
	 */
	public static void read2(String filePath){
		System.out.println("------second method-------");
		File file = new File(filePath);
		if(file.exists()){
			try {
				FileReader fileReader = new FileReader(file);
				BufferedReader br = new BufferedReader(fileReader);
				String lineContent = null;
				while((lineContent = br.readLine())!=null){
					System.out.println(lineContent);
				}
				br.close();
				fileReader.close();
			} catch (FileNotFoundException e) {
				System.out.println("no this file");
				e.printStackTrace();
			} catch (IOException e) {
				System.out.println("io exception");
				e.printStackTrace();
			}
		}
	}
}
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