用java实现一个亲戚称呼系统

response);
} else {
User user = new User();
user.setUsername(username);
user.setPassword(MD5Util.md5(password));
userDao.insert(user);
response.sendRedirect(request.getContextPath() + "/login.jsp");
}
} catch (SQLException e) {
好的，针对您的需求，我可以提供一个简单的Java程序来实现一个基于交互的 e.printStackTrace();
}
}
}

7. 实现留言的Servlet

我们可以使用`MessageServlet`来亲戚称呼系统。具体实现过程如下：

1. 首先，您需要定义一个包含亲戚称实现留言功能。

package com.example.servlet;

import com.example.bean.Message;
import com.example.bean.User;
import com呼关系的数据结构。在这个例子中，我会使用一个HashMap来存储亲戚关系，其中.example.dao.MessageDao;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
key代表称呼关系，value代表对应的称呼。例如：

HashMap<String, String> relationship =import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.sql.SQLException;
import java.util.List;

@WebServlet new HashMap<>();
relationship.put("father", "父亲");
relationship.put("mother", "母亲");
relationship.put("brother", "兄("/message")
public class MessageServlet extends HttpServlet {
    private MessageDao messageDao;

    public void init() {
        messageDao = new弟");
relationship.put("sister", "姐妹");
relationship.put("grandfather", "祖父");
relationship.put("grandmother", " MessageDao();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("user");
        if (user == null) {
            response.sendRedirect(request.getContextPath() + "/祖母");
relationship.put("son", "儿子");
relationship.put("daughter", "女儿");
relationship.put("husband", "丈login.jsp");
            return;
        }
        try {
            List<Message> list = messageDao.findAll();
            request.setAttribute("list", list夫");
relationship.put("wife", "妻子");

2. 接下来，我们需要编写一个方法来处理用户输入);
request.getRequestDispatcher("/message.jsp").forward(request, response);
} catch (SQLException e) {
e.printStackTrace();
}
的关系并返回对应的称呼。我们可以使用Java的正则表达式来处理用户输入的字符串，从 }

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
HttpSession session = request.getSession();
User user = (而得到对应的称呼关系。例如：

public static String getRelationship(String input) {
    Pattern p =User) session.getAttribute("user");
        if (user == null) {
            response.sendRedirect(request.getContextPath() + "/login.jsp");
            return;
        }
        String content = request.getParameter("content");
        Message message = new Message();
        message.setUserId(user.getId());
        Pattern.compile("(父|母|兄|姐|弟|妹|祖父|祖母|儿|女|夫|妻)");
 message.setUsername(user.getUsername());
        message.setContent(content);
        try {
            messageDao.insert(message);
            response.sendRedirect(request.getContextPath() + "/    Matcher m = p.matcher(input);
    if (m.find()) {
        String key = "";
        switch (m.group()) {
            casemessage");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

以上就是一个简单的 "父":
key = "father";
break;
case "母":
key = "mother";
break;
caseJSP+Servlet+JDBC实现的留言板的示例代码。