登陆与注册接口JSON

package cn.yuan.yi.studenta; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import cn.yuan.yi.business.DBHelper; import cn.yuan.yi.business.StudentBusiness; import cn.yuan.yi.jsobject.ListObject; import cn.yuan.yi.json.responseUtils.ResponseUtils; import cn.yuan.yi.json.status.StatusHouse; import cn.yuan.yi.jsonutils.JackJsonUtils; import cn.yuan.yi.model.Students; /** * Servlet implementation class EditDemo */ @WebServlet("/EditDemo") public class EditDemo extends HttpServlet { private static final long serialVersionUID = 1L; private static final String String = null; private String sql ; private DBHelper db; public void init() throws ServletException { db = new DBHelper(sql); } /** * @see HttpServlet#HttpServlet() */ public EditDemo() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //response.getWriter().append("Served at: ").append(request.getContextPath()); //System.out.println("aaaaaa"); doPost(request, response); // String[] vaphone = request.getParameterValues("phonea"); // // System.out.println("用户登录..."); // System.out.println(str); // for(int i=1;i<=vaphone.length;i++) { // System.out.println(vaphone[i-1]); // } } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub String method = request.getParameter("method"); if("login".equals(method)){//登录 String username = request.getParameter("username"); String password = request.getParameter("password"); if(username==null||"".equals(username.trim())||password==null||"".equals(password.trim())){ System.out.println("用户名或密码不能为空！"); //response.sendRedirect("login.jsp"); return; } Students userBean = new Students(); PrintWriter writer = response.getWriter();//得到打印流对象 //String str=request.getParameter("namea"); writer.print(userBean);//浏览器打印 // boolean isValid = userBean.valid(username,password); // if(isValid){ // System.out.println("登录成功！"); // request.getSession().setAttribute("username", username); // response.sendRedirect("welcome.jsp"); // return; // }else{ // System.out.println("用户名或密码错误，登录失败！"); // response.sendRedirect("login.jsp"); // return; // } } // List<Students> list = StudentBusiness.getAllStudents(); // ListObject listObject=new ListObject(); // listObject.setItems(list); // listObject.setStatusObject(StatusHouse.COMMON_STATUS_OK); // String responseText = JackJsonUtils.toJson(listObject); // ResponseUtils.renderJson(response, responseText); } }