Java io流常用流類 BufferedReader讀入詳解

        BufferedReader類用于緩沖讀取字元，将位元組流封裝成BufferedReader對象，然後用readLine()方法逐行讀取，然後傳回，我們通過循環使用StringBuffer的append（）方法接受，或者通過循環直接在控制台上輸出。

此為通過循環直接在控制台輸出

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Buffered3 {
	
	public static void main(String[] args){
		
		BufferedReader  br = null;
		FileReader      fr = null;

		try {
			fr  = new FileReader("E:\\haha\\jie.doc");
			br  = new BufferedReader(fr);
			String next = "";
			while((next=br.readLine())!=null){
				System.out.println(next);
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				br.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		
	}

}
           

此為通過StringBuffer接受然後用append（）方法組合輸出：

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class Buffered3 {
	
	public static void main(String[] args){
		
		BufferedReader  br = null;
		FileReader      fr = null;

		try {
			fr  = new FileReader("E:\\haha\\jie.doc");
			br  = new BufferedReader(fr);
			String next = "";
			StringBuffer sbff = new StringBuffer();
			while((next=br.readLine())!=null){
				sbff.append(next);
			}
			System.out.println(sbff.toString());
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			try {
				br.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		
	}

}