📄 registwithvalid.java
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package lee;
import javax.servlet.ServletException;
import javax.servlet.ServletContext;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.io.IOException;
import java.util.*;
import java.text.*;
/**
* @author yeeku.H.lee kongyeeku@163.com
* @version 1.0
* <br>Copyright (C), 2005-2008, yeeku.H.Lee
* <br>This program is protected by copyright laws.
* <br>Program Name:
* <br>Date:
*/
public class RegistWithValid extends HttpServlet
{
public void service(HttpServletRequest request,HttpServletResponse response)throws IOException,ServletException
{
request.setCharacterEncoding("gb2312");
String name = request.getParameter("username");
String pass = request.getParameter("pass");
String strAge = request.getParameter("age");
String strBirth = request.getParameter("birth");
String errStr = "";
if (name == null )
{
errStr += "您的用户名没有输入！";
}
else if (name.trim().equals(""))
{
errStr += "您的用户名不能为空！";
}
if (pass == null )
{
errStr += "<br>您的密码没有输入！";
}
else if(pass.trim().equals(""))
{
errStr += "<br>您的密码不能为空！";
}
if (strAge == null )
{
errStr += "<br>您的年龄没有输入！";
}
if (strBirth == null)
{
errStr += "<br>您的生日没有输入！";
}
int age = 0;
try
{
age = Integer.parseInt(strAge);
}
catch (Exception e)
{
errStr += "<br>您输入的年龄格式不正确，无法正常转换为整数";
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-DD");
Date birth = null;
try
{
birth = sdf.parse(strBirth);
}
catch (Exception e)
{
errStr += "<br>您输入的生日格式不正确，无法正常转换为日期，请按yyyy-MM-DD格式输入.";
}
if (errStr.equals(""))
{
response.setContentType("text/html;charset=gb2312");
PrintWriter out = response.getWriter();
out.println("<html><head><title>");
out.println("类型转换页面");
out.println("</title></head><body>");
out.println("<h1>类型转换页面</h1>");
out.println(name + "<br>");
out.println(pass + "<br>");
out.println(age + "<br>");
out.println(birth + "<br>");
out.println("</body></html>");
}
else
{
ServletContext sc = getServletConfig().getServletContext();
RequestDispatcher rd = sc.getRequestDispatcher("/regist.jsp");
request.setAttribute("error",errStr);
rd.forward(request,response);
}
}
public void destroy()
{
super.destroy();
}
}
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