一、创建java web项目
参考
二、创建LoginServlet类
LoginServlet需要继承HttpServlet，并重写四个方法：
- init()
- doGet()
- doPost()
- destroy()
package com.httpshttp.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public void init(ServletConfig config) throws ServletException {
}
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws IOException, ServletException {
String certName = req.getHeader("client-cert-dn");
String scheme = req.getHeader("X-Forwarded-Proto");
if (scheme == null) scheme = "http";
String username = req.getParameter("username");
String context = req.getContextPath();
PrintWriter out = resp.getWriter();
out.println("<html><head><title>test</title></head><body>");
if (username == null || "".equals(username)) {
resp.sendRedirect(context);
}
if ("https.user".equals(username) && "http".equals(scheme)) {
out.println("user " + username + " need authentication, wait 8 seconds for redirecting, or click ");
out.println("<a href=" + "https://demo.belle.net.cn/httpshttp" + ">" + "ssl portal" + "</a>");
out.println("<script language=‘javascript‘>");
out.println("window.setTimeout(\"window.location=\‘https://demo.belle.net.cn/httpshttp\‘\",8000); ");
out.println("</script>");
out.println("</body></html>");
out.close();
return;
}
if (certName != null && !("/CN=" + username).equals(certName)) {
out.println("user " + username + " login success");
out.println(" ,but does not match certificate name " + certName);
} else {
out.println("user " + username + " login success");
}
out.println("</body></html>");
out.close();
}
public void doPost(HttpServletRequest req, HttpServletResponse resp)
throws IOException, ServletException {
doGet(req, resp);
}
public void destroy() {
}
}
三、配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>demo</display-name>
<servlet>
<servlet-name>login</servlet-name>
<servlet-class>com.httpshttp.servlet.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>login</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
</web-app>
四、浏览器访问
时间： 2024-10-09 09:31:07