字符串加密后显示不出来.麻烦给找找错误.

Question

直接上代码了.
[code="java"]import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Main extends JFrame {
JTextField text1, text2, text3;
JButton btn1, btn2;
String key = "fantistic";

Main() {
    //Initialize
    super("Encrypt");
    this.setSize(450, 490);
    this.setLayout(new GridLayout());

    text1 = new JTextField(16);
    text2 = new JTextField();
    text3 = new JTextField();
    text3.setEditable(false);
    btn1 = new JButton("Encrypt");
    btn2 = new JButton("Decrypt");

    //Layout
    Box baseBox, boxV1, boxV2;
    boxV1 = Box.createVerticalBox();
    boxV1.add(btn1);
    boxV1.add(Box.createVerticalStrut(8));
    boxV1.add(btn2);
    boxV1.add(Box.createVerticalStrut(16));
    boxV2 = Box.createVerticalBox();
    boxV2.add(Box.createVerticalStrut(4));
    boxV2.add(text1);
    boxV2.add(Box.createVerticalStrut(8));
    boxV2.add(text2);
    boxV2.add(Box.createVerticalStrut(8));
    boxV2.add(text3);
    baseBox = Box.createHorizontalBox();
    baseBox.add(boxV1);
    baseBox.add(Box.createHorizontalStrut(10));
    baseBox.add(boxV2);
    setLayout(new FlowLayout());
    add(baseBox);
    validate();
    setBounds(120, 125, 300, 150);
    setVisible(true);
    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

    //Event
    btn1.addActionListener(new encrypt());
    btn2.addActionListener(new decrypt());

}

private class encrypt implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        String str = text1.getText();
        char[] chr = new char[str.length()];
        int len = chr.length;
        StringBuffer bstr = new StringBuffer(str);
        for (int i = 0; i < str.length(); i++) {
            int q = (key.charAt(i % key.length()) >> (i % 32)) | (key.charAt(i % key.length()) << (32 - (i % 32)));
            bstr.setCharAt(i, (char) (str.charAt(i) ^ q));
        }
        for (int i = 0; i < len; i++) {

            chr[i] = bstr.charAt(len - 1 - i);
        }
        text3.setText(String.valueOf(chr));
    }
}

private class decrypt implements ActionListener {
    public void actionPerformed(ActionEvent e) {
        String str = text2.getText();
        char[] chr = new char[str.length()];
        int len = chr.length;
         StringBuffer bstr = new StringBuffer(str);
        for (int i = 0; i < str.length(); i++) {
            //左
            int q = (key.charAt(i % key.length()) << (i % 32)) | (key.charAt(i % key.length()) >> (32 - (i % 32)));
            bstr.setCharAt(i, (char) (str.charAt(i) ^ q));
        }
        for (int i = 0; i < len; i++) {
            chr[i] = bstr.charAt(len - 1 - i);
        }
        text3.setText(String.valueOf(chr));
    }
}

public static void main(String[] args) {
    new Main();
}

}[/code]
[b]问题补充：[/b]
To 1 yayg,
请多输入几个字符.
.解密不回来...而且貌似加密时丢失字符...
[b]问题补充：[/b]
To wocsok,
那个顺序确实是有问题...
还有key.charAt移位也有问题.char 2byte.16位...都改成16还是无法解密..
[b]问题补充：[/b]
已经解决了。。不能用int q
用char就对 了。。

Answer 1

经过调试，发现这样一个问题，
将要解密的字符串反序后运行解密方法，第一个 数字 可以正常解密。
解密时的q值分别为102，194，440.但加密时的q好像有点怪：102，-2147483600，-2147483621。
不知道这是不是你知道的，说出来，希望对你有所帮助。