18.6.2 从内存输入

下面这个例子是在18.6.1的基础上, 展示了利用 StringReader从内从中将字符串读取, 并用read方法一个个读取字符输出

package com.cnsuning.file;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.StringReader;

public class BufferInputFile {

	public BufferInputFile() {
		// TODO Auto-generated constructor stub
	}

	public static String read(String fileName) {
		return read(new File(fileName));
	}

	public static String read(File inputFile) {
		try {
			FileReader fReader = new FileReader(inputFile);
			BufferedReader bReader = new BufferedReader(fReader);
			StringBuilder sb = new StringBuilder();
			String line = "";
			while (null != (line = bReader.readLine())) {
				sb.append(line + "\n");
			}
			bReader.close();
			return sb.toString();
		} catch (FileNotFoundException e) {
			throw new RuntimeException(e);
		} catch (IOException e) {
			throw new RuntimeException(e);
		}

	}

	public static void main(String[] args) {
		// System.out.println(read("D:\\work\\会员账户管理\\sales_svn.txt"));
		StringReader sr = new StringReader(
				read("D:\\work\\会员账户管理\\sales_svn.txt"));
		int c = 0;
		try {
			while ((c = sr.read()) != -1) {
				System.out.print((char) c);
			}
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
	}

}