Java Servlet class 找不到 bean class

Question

我已经创建了一个 servlet 文件 'LoginServlet.java' 和一个 bean 文件 'SimpleBean.java' 并将它们放在同一个文件中 folder.When 我编译了它成功编译的 bean 文件但是当我编译 servlet文件我收到错误 'cannot find symbol'，它表示我在 servlet class.

中实例化的 bean class

LoginServlet.java

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.*;
import java.util.*;

public class LoginServlet extends HttpServlet {

    public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
        response.setContentType("text/writer");
        PrintWriter pw = response.getWriter();
        String name = request.getParameter("username");
        String password = request.getParameter("password");
        String code = request.getParameter("code");
        SimpleBean bean = new SimpleBean();
        //admin login
        if (name.equals("admin") && password.equals("admin")) {
            RequestDispatcher rd = request.getRequestDispatcher("adminservlet");
            rd.forward(request, response);
        } else { //general login
            try {
                Class.forName("com.mysql.jdbc.Driver");
                Connection con = DriverManager.getConnection("jdbc:mysql://localhost/" + code, "root", "");
                PreparedStatement pst = con.prepareStatement("SELECT * FROM demo_teacher WHERE name = ?");
                pst.setString(1, name);
                ResultSet rs = pst.executeQuery();
                if (rs.next()) {
                    HttpSession session = request.getSession(true);
                    session.setAttribute("user", name);
                    ArrayList rows = new ArrayList();
                    do {
                        List row = new ArrayList();
                        row.add(rs.getString("name"));
                        row.add(rs.getString("login_time"));
                        row.add(rs.getString("logout_time"));
                        rows.add(row);
                    } while (rs.next());
                    request.setAttribute("resultSet", rows);
                    RequestDispatcher rd = request.getRequestDispatcher("profile.jsp");
                    rd.forward(request, response);
                } else {
                    RequestDispatcher rd = request.getRequestDispatcher("index.jsp");
                    rd.forward(request, response);
                }
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }
}

SimpleBean.java

public class SimpleBean {

    String name;
    String loginTime;
    String logoutTime;

    public void setName(String n) {
        name = n;
    }

    public void setLoginTime(String t) {
        loginTime = t;
    }

    public void setLogoutTime(String t2) {
        logoutTime = t2;
    }

    public String getName() {
        return name;
    }

    public String getLoginTime() {
        return loginTime;
    }

    public String getLogoutTime() {
        return logoutTime;
    }
}

命令提示符：

Answer 1

由于您是从命令行编译的，因此请检查您的 class路径。确保它包含存储 .class 文件的目录（在本例中，它是当前目录）：

set CLASSPATH=.;%CLASSPATH%

Java Servlet class 找不到 bean class

Java Servlet class can not find the bean class

java

servlets

javabeans