[英]Update in jsp from Servlet not working
我有兩個 servlet BookSaleAuction 和 MemberServlet 以及一些用於插入和更新為 index.jsp 和 MemberDetailUpdate.jsp 的 jsp 文件和
在 MemberDetailUpdate.jsp 中
<form method= "post" action="/booksaleauction">
UserName : <input type="text" name="name" value="<%=editname%>">
Address : <input type="text" name="address" value="<%=address%>">
Contact : <input type="tel" name="contactNo" value="<%=contact%>">
Email : <input type="email" name="email" value="<%=editemail%>">
<input type="hidden" name="id" value="<%=editID%>">
<input type="hidden" name="formAction" value="update">
<input type="submit" name="Update">
</form>
並在 BookSaleAuctionServlet 中
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String form = request.getParameter("formAction");
System.out.print(form);
}
並在 MemberServlet 中
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.print("into member servlet ");
String name = request.getParameter("name");
String address = request.getParameter("address");
String contact = request.getParameter("contactNo");
String email = request.getParameter("email");
String id = request.getParameter("id");
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
System.out.println("Class not found " + e);
}
System.out.println("JDBC Class found");
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
Statement st = null;
try {
con = DriverManager.getConnection("jdbc:mysql://localhost/logins", "root", "");
String sql = "UPDATE members SET username=?, email=?, contact=?, address=? WHERE id=?";
// ps = con.prepareStatement("UPDATE Users SET password=?, fullname=?, email=? WHERE id=id");
PreparedStatement statement = con.prepareStatement(sql);
statement.setString(1, name);
statement.setString(2, email);
statement.setString(3, contact);
statement.setString(4, address);
int rowsUpdated = statement.executeUpdate();
if (rowsUpdated > 0) {
System.out.println("An existing user was updated successfully!");
}
} catch (SQLException e) {
System.out.println("SQL exception occured" + e);
}
try {
request.getRequestDispatcher("MemberDetail.jsp").forward(request, response);
} catch (Exception e) {
System.out.println("SQL exception occured" + e);
}
在兩個 servlet 中,只要在 jsp 中完成更新,就不會執行任何進一步的操作。 即使我更改了從另一個 servlet BookSaleAuction
Plz 幫助運行的操作和方法,它也不適用於表單,我不知道我BookSaleAuction
誤。
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