📄 doregister.java
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package ss06.sl.pj3;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import ss06.sl.pj3.DBUtil;
public class DoRegister extends HttpServlet {
/**
* Constructor of the object.
*/
public DoRegister() {
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.
*
* @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 doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* 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 {
request.setCharacterEncoding("gb2312");
response.setContentType("text/html; charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>网上书店 - 用户注册</TITLE></HEAD>");
out.println(" <BODY>");
DBUtil dbutil = DBUtil.getInstance();
dbutil.connect2DB();
try{
String username = request.getParameterValues("userName")[0].trim();
String password1 = request.getParameterValues("password1")[0].trim();
String password2 = request.getParameterValues("password2")[0].trim();
String sex = request.getParameterValues("sex")[0].trim();
char gender = sex.charAt(0);
String strAge = request.getParameterValues("age")[0].trim();
int age;
try{
age = Integer.parseInt(strAge);
}catch(Exception e){
age = 0;
}
String role = request.getParameterValues("role")[0].trim();
String email = request.getParameterValues("email")[0].trim();
String address = request.getParameterValues("address")[0].trim();
if(username == ""){
out.println("请输入用户名！<br>");
out.println("<a href=\"javascript:history.back();\">返回注册页面</a>");
}else if(password1 == ""){
out.println("请输入密码！<br>");
out.println("<a href=\"javascript:history.back();\">返回注册页面</a>");
}else if(!password1.equals(password2)){
out.println("密码输入不一致！<br>");
out.println("<a href=\"javascript:history.back();\">返回注册页面</a>");
}else{
String userID = dbutil.getUserID();
if(dbutil.isUserCanAdd(username)){
dbutil.addUser(userID, username, password1, gender, age,
role, email, address);
out.println("注册成功！<br>您的userid是：" + userID + "<br>");
out.println("<a href=\"../index.jsp\">返回登录页面</a>");
}
else{
out.println("用户名已存在！<br>");
out.println("<a href=\"javascript:history.back();\">返回注册页面</a>");
}
}
}catch(Exception e){
out.print(e.toString());
}
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init() throws ServletException {
// Put your code here
}
}
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