filein.java

小型的课程设计

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/**
 *
 * @author Administrator
 */
import java.io.*;
public class filein {//文件解密存储
    public boolean cunchu(String shurulujing, String mima, String shuchulujing) {
        boolean fanhui = false;
        try {
            jiemisf jm = new jiemisf();
            FileReader in = new FileReader(shurulujing);//建立文件输入流

            BufferedReader bin = new BufferedReader(in);//建立缓冲输入流

            FileWriter out = new FileWriter(shuchulujing, true);//建立文件输出流

            String str = null;
            str = bin.readLine();//读取一行数据
            char[] mmyuan = new char[str.length()];//创建字符数组
            char[] mmjg = new char[str.length()];//创建字符数组
            str.getChars(0, str.length(), mmyuan, 0);//输入的密码转换成字符数组
            mmjg = jm.jiemizhuanhua(mmyuan);//提取的内容进行解密
            String tt = String.valueOf(mmjg);//解密后的提取内容转化成字符串
  //         System.out.println(tt);//测试
            String mm=tt.substring(0, mima.length());//提取密码
 //           System.out.println(mm);//测试
            int bijiao=mm.compareTo(mima);//比较提取的密码与输入的密码是否相同
            if(bijiao==0){//提取的密码与输入的密码是相同
            while ((str = bin.readLine()) != null) {
                //将缓冲区内容通过循环方式逐行赋值给字符串str
    //            System.out.println(str);//测试

                char[] yuan = new char[str.length()];//创建字符数组
                char[] jg = new char[str.length()];//创建字符数组
                str.getChars(0, str.length(), yuan, 0);//输入的密码转换成字符数组
                jg = jm.jiemizhuanhua(yuan);//给输入的密码进行解密
                String jieguo = String.valueOf(jg);//将解密后的内容转化成字符串
                out.write(jieguo+"\r\n");//将解密后的内容存储到文件
            }
            in.close();//关闭文件
            out.close();//关闭文件
            fanhui= true;
            }
            else{//提取的密码与输入的密码是相同
                fanhui= false;
            }
        } catch (FileNotFoundException fe) {
        } catch (IOException ioe) {
        }
        return fanhui;
    }   
}