nio.java

非常完整的rsa加密解密软件 有多完整？自己看吧

/*******************************************************************************
 * COPYRIGHT@Yimignhe
 * 
 * @Fudan University
 * @2005-10-21 FREE FOR USE
 ******************************************************************************/

// IO读取与写入!
package tool;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.StringReader;

public class NIO {

	/**
	 * 读文件
	 * @param readname，要读文件的名字
	 * @return 文件内容
	 */
	public static String open(String readname) {
		String s2 = "open wrong!!!";
		try {

			BufferedReader in = new BufferedReader(new FileReader(readname));
			String s = new String();
			s2 = new String();
			while ((s = in.readLine()) != null)
				s2 += s + "\n";
			in.close();
		} catch (Exception e) {
			System.out.println("open wrong!!!");
		}
		return s2;
	}

	/**
	 * 保存文件
	 * @param s2，要保存的内容
	 * @param savename，要保存文件的名字
	 */
	public static void save(String s2, String savename) {
		try {
			BufferedReader in2 = new BufferedReader(new StringReader(s2));
			PrintWriter out1 = new PrintWriter(new BufferedWriter(
					new FileWriter(savename)));
			String s = new String();
			while ((s = in2.readLine()) != null)
				out1.println(s);
			out1.close();
		} catch (Exception e) {
			System.out.println("write wrong!!!");
		}
	}
}