{"id":135300,"date":"2024-05-08T16:37:14","date_gmt":"2024-05-08T11:07:14","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=135300"},"modified":"2024-05-08T16:37:14","modified_gmt":"2024-05-08T11:07:14","slug":"login-application-with-servlet-and-database-part-1","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/login-application-with-servlet-and-database-part-1\/","title":{"rendered":"Login Application with Servlet and Database Part &#8211; 1"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">package dataflair;\r\n\r\nimport java.io.IOException;\r\nimport java.io.PrintWriter;\r\nimport javax.servlet.ServletException;\r\nimport javax.servlet.http.HttpServlet;\r\nimport javax.servlet.http.HttpServletRequest;\r\nimport javax.servlet.http.HttpServletResponse;\r\nimport java.sql.*;\r\n\r\npublic class LoginServlet extends HttpServlet \r\n{\r\n\r\n    protected void processRequest(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException {\r\n        response.setContentType(\"text\/html;charset=UTF-8\");\r\n        try (PrintWriter out = response.getWriter()) {\r\n            \/* TODO output your page here. You may use following sample code. *\/\r\n            out.println(\"&lt;!DOCTYPE html&gt;\");\r\n            out.println(\"&lt;html&gt;\");\r\n            out.println(\"&lt;head&gt;\");\r\n            out.println(\"&lt;title&gt;Servlet LoginServlet&lt;\/title&gt;\");            \r\n            out.println(\"&lt;\/head&gt;\");\r\n            out.println(\"&lt;body&gt;\");\r\n            out.println(\"&lt;h1&gt;Servlet LoginServlet at \" + request.getContextPath() + \"&lt;\/h1&gt;\");\r\n            out.println(\"&lt;\/body&gt;\");\r\n            out.println(\"&lt;\/html&gt;\");\r\n        }\r\n    }\r\n\r\n   \r\n    @Override\r\n    protected void doGet(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException \r\n    {\r\n        PrintWriter out=response.getWriter();\r\n        out.println(\"Welcome to my Do Get Method\");\r\n        \r\n    }\r\n\r\n   \r\n    @Override\r\n    protected void doPost(HttpServletRequest request, HttpServletResponse response)\r\n            throws ServletException, IOException \r\n    {\r\n        PrintWriter out=response.getWriter();\r\n        Connection con=null;\r\n        PreparedStatement ps=null;\r\n        ResultSet rs=null;\r\n        try\r\n        {\r\n               Class.forName(\"com.mysql.jdbc.Driver\");\r\n               out.println(\"Driver load successfully..........\");\r\n        }\r\n        catch(ClassNotFoundException e)\r\n        {\r\n            out.println(e); \r\n        }    \r\n        try\r\n        {\r\n            con = DriverManager.getConnection(\"jdbc:mysql:\/\/localhost\/dataflair\", \"root\", \"root@data\");\r\n               out.println(\"Database connection done successfully..........\");\r\n                      String user,pass;\r\n                      user=request.getParameter(\"txtuser\");\r\n                      pass=request.getParameter(\"txtpass\"); \r\n                String sql;\r\n                sql=\"select * from emplogin where userid=? and password=?\";\r\n                ps=con.prepareStatement(sql);\r\n                ps.setString(1, user);\r\n                ps.setString(2, pass);\r\n                rs=ps.executeQuery();\r\n                if(rs.next())\r\n                     response.sendRedirect(\"user.html\");\r\n                else\r\n                    response.sendRedirect(\"index.html\");                     \r\n                \r\n        }\r\n        catch(SQLException e)\r\n        {\r\n               out.println(e);\r\n        }    \r\n        \r\n\r\n       \r\n    }\r\n\r\n   \r\n    @Override\r\n    public String getServletInfo() \r\n    {\r\n        return \"Short description\";\r\n    }\/\/ &lt;\/editor-fold&gt;\r\n \r\n}<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 package dataflair; 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 java.sql.*; public class LoginServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {&#46;&#46;&#46;<\/p>\n","protected":false},"author":86671,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31448],"tags":[31873,31871,31872,31932,31931,31930,31899],"class_list":["post-135300","post","type-post","status-publish","format-standard","hentry","category-advanced-java-tutorials","tag-advanced-java","tag-advanced-java-practical","tag-advanced-java-program","tag-login-application","tag-login-application-with-servlet","tag-login-application-with-servlet-and-database","tag-servlet"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Login Application with Servlet and Database Part - 1 - DataFlair<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/login-application-with-servlet-and-database-part-1\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Login Application with Servlet and Database Part - 1 - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 package dataflair; 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