[英]One Servlet need to Call another Servlet along with response & request
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String username = request.getParameter("u");
String password = request.getParameter("p");
Connection con = DBConnection.Connect();
String sql = "select *from users where name=? and pass=?";
try {
PreparedStatement ps = con.prepareStatement(sql);
ps.setString(1, username);
ps.setString(2, password);
ResultSet rs = ps.executeQuery();
request.getRequestDispatcher("WelcomeServlet").forward(request, response); //This line calls another servlet
} catch (SQLException e) {
System.out.println(e.toString());
}
}
}
public class WelcomeServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String username = request.getParameter("username");
response.setContentType("html/text");
PrintWriter pw = response.getWriter();
pw.write("<html><body>");
pw.write("<title>Welcome User</title>");
pw.write("<h1>" + username + "</h1>");
pw.write("</body></html>");
pw.close();
}
我想驗證的servlet調用servlet的歡迎，但其問我是否要下載一個驗證的servlet文件.PFA更多細節我收到彈出下載驗證序列
內容類型應該是text/html （您寫了html/text ），否則瀏覽器不知道如何處理文件並要求下載文件。
該代碼還有其他一些問題值得一提
u在另一個servlet中使用username 。
從另一個servlet調用servlet方法名稱顯示（HttpServletRequest請求，HttpServletResponse響應）
[英]call servlet method name display(HttpServletRequest request, HttpServletResponse response) from another servlet
請求屬性在從一個 Servlet 轉發到另一個 Servlet 的過程中丟失
[英]Request Attributes are lost during forwarding from one Servlet to another Servlet
如何使用Java在GWT中將一個servlet調用到另一個servlet
[英]How to call one servlet to another servlet in GWT Using Java
聲明:本站的技術帖子網頁，遵循CC BY-SA 4.0協議，如果您需要轉載，請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.