📄 login.java
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package ch10;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class Login extends HttpServlet {
private static final String CONTENT_TYPE = "text/html; charset=GBK";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//设置MIME类型
response.setContentType(CONTENT_TYPE);
//获取用户输入的信息
String username = request.getParameter("username");
String userpass = request.getParameter("userpass");
//对用户名进行编码转换
username = new String(username.getBytes("8859_1"));
//得到输出流
PrintWriter out = response.getWriter();
//对用户进行响应
if(username.equals(userpass)&&username.length()!=0)
{
out.println("<html>");
out.println("<head><title>登陆</title></head>");
out.println("<body bgcolor=\"#ffffff\">");
out.println("<p>登陆成功</p>");
out.println("</body></html>");
HttpSession session = request.getSession(true);
session.setAttribute("user",username);
}
else
{
response.sendRedirect("login.jsp");
}
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
//Clean up resources
public void destroy() {
}
}
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