2024/2/3日 日志 期末考试案例回顾与分析---》综合案例（7）

功能4：发送内部消息
InternalMessageMapper

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@Insert("INSERT ft_internalmessage VALUES(null,#{category},#{senderName},#{senderNo},#{receiverName},#{receiverNo},#{content},#{state})")
@ResultMap("InternalMessageResultMap")
void addInternalMessage(InternalMessage internalMessage);

StudentService

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public void addInternalMessage(InternalMessage internalMessage) {
    try (SqlSession session = factory.openSession()) {
        InternalMessageMapper internalMessageMapper = session.getMapper(InternalMessageMapper.class);
        internalMessageMapper.addInternalMessage(internalMessage);
        session.commit();
    }
}

StudentServlet

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else if ("addIM".equals(action)) {
    int id = Integer.parseInt(request.getParameter("id"));
    String category = request.getParameter("category");
    String content =request.getParameter("content");
    String receiverNo = request.getParameter("receiverNo");
    int receiverId = Integer.parseInt(receiverNo);
    UserInfo userInfo1 = service.selectUserInfoById(Integer.parseInt(currentUser.getUsername()));
    UserInfo userInfo2 = service.selectUserInfoById(receiverId);

    InternalMessage internalMessage = new InternalMessage();
    internalMessage.setId(id);
    internalMessage.setCategory(category);
    internalMessage.setSenderName(userInfo1.getUserName());;
    internalMessage.setSenderNo(currentUser.getUsername());
    internalMessage.setReceiverName(userInfo2.getUserName());
    internalMessage.setReceiverNo(receiverNo);
    internalMessage.setContent(content);
    String state = "未读";
    internalMessage.setState(state);

    service.addInternalMessage(internalMessage);

    request.setAttribute("message", "发送信息成功");
    request.getRequestDispatcher("/personalHome.jsp").forward(request, response);
}