基于javaweb的JSP+Servlet学生选课系统(java+javaweb+jdbc)

运行环境

Java≥8、MySQL≥5.7、Tomcat≥8

开发工具

eclipse/idea/myeclipse/sts等均可配置运行

适用

课程设计，大作业，毕业设计，项目练习，学习演示等

功能说明

功能介绍：

用户菜单、学生管理、教师管理、课程管理、成绩排名查询

基于javaweb的JSP+Servlet学生选课系统(java+javaweb+jdbc)

 *            the request send by the client to the server
 * @param response
 *            the response send by the server to the client
 * @throws ServletException
 *             if an error occurred
 * @throws IOException
 *             if an error occurred
 */
public void doGet(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException {

	doPost(request, response);
}

/**
 * The doPost method of the servlet. <br>
 * 
 * This method is called when a form has its tag value method equals to
 * post.
 * 
 * @param request
 *            the request send by the client to the server
 * @param response
 *            the response send by the server to the client
 * @throws ServletException
 *             if an error occurred
 * @throws IOException
 *             if an error occurred
 */
public void doPost(HttpServletRequest request, HttpServletResponse response)
		throws ServletException, IOException {
	response.setContentType("text/html;charset=utf-8");
	request.setCharacterEncoding("utf-8");
	PrintWriter out = response.getWriter();
	String m_id = request.getParameter("id");
	String old;
	String pw1 = null;
	String pw2 = null;
	old = request.getParameter("oldpassword");
	pw1 = request.getParameter("password1");
	pw2 = request.getParameter("password2");
	
	//查询原密码
	String sql="select password from manager where id = '"+m_id+"'";
	sqlBean db=new sqlBean();
	ResultSet rs = db.executeQuery(sql);
	String dbOldPwd = "";
	try {

	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void goo(HttpServletRequest request,HttpServletResponse response,String kind)
	throws ServletException,IOException{
		if(kind.equals("student")){
			//控制页面跳转
			RequestDispatcher rd=getServletContext().getRequestDispatcher("/student/student.jsp");
			rd.forward(request, response);
		}
		if(kind.equals("teacher")){
			RequestDispatcher rd=getServletContext().getRequestDispatcher("/teacher/teacher.jsp");
			rd.forward(request, response);
		}
		if(kind.equals("manager")){
			RequestDispatcher rd=getServletContext().getRequestDispatcher("/manager/manager.jsp");
			rd.forward(request, response);
		}
	}
	public void doError(HttpServletRequest request,HttpServletResponse response,String str)
			throws ServletException,IOException{
				request.setAttribute("problem", str);
				getServletConfig().getServletContext().getRequestDispatcher("/errorpage.jsp").forward(request, response);
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request,response);
	}
	

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
package servlet;

	else if(grade>=68)
		jpa=2.0;
	else if(grade>=66)
		jpa=1.7;
	else if(grade>=64)
		jpa=1.3;
	else if(grade>=60)
		jpa=1.0;
	else 
		jpa=0.0;	
	return jpa;
}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
package servlet;




public class updateMpassword extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public updateMpassword() {
		super();
	}

	/**

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
package servlet;




public class updateSpassword extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public updateSpassword() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

				request.setAttribute("info", str);
				RequestDispatcher rd=getServletContext().getRequestDispatcher("/succpage.jsp");
				rd.forward(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
package servlet;




public class m_updatescore extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public m_updatescore() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 

		jpa=3.3;
	else if(grade>=78)
		jpa=3.0;
	else if(grade>=75)
		jpa=2.7;
	else if(grade>=72)
		jpa=2.3;
	else if(grade>=68)
		jpa=2.0;
	else if(grade>=66)
		jpa=1.7;
	else if(grade>=64)
		jpa=1.3;
	else if(grade>=60)
		jpa=1.0;
	else 
		jpa=0.0;	
	return jpa;
}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
package servlet;

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项目链接：
https://javayms.github.io?id=321422282105200de
https://javayms.pages.dev?id=321422282105200de