package mycode;
import java.sql.*
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;
public class Login extends HttpServlet {
private static final long serialVersionUID = -4546189621945422719L;
String URL = "jdbc:mysql://127.0.0.1";
String USER = "root";
String PASS = "1234";
@Override
protected void doGet(HttpServletRequest req,HttpServletResponse res)
throws IOException,ServletException{
}
public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
String username = req.getParameter("username");
String password = req.getParameter("password");
res.setContentType("text/html");
PrintWriter out = res.getWriter();
try {
Connection con = DriverManager.getConnection(URL, USER, PASS);
String sql = "INSERT INTO cloud.cloud_table (Username,Password)" +
"VALUES (?, ?)";
PreparedStatement pst = con.prepareStatement(sql);
pst.setString(1, username);
pst.setString(2, password);
pst.executeUpdate();
out.println("<html><body>");
out.println("THANKS FOR CREATING AN ACCOUNT");
out.println("</body></html>");
}
catch (SQLException ex) {
ex.printStackTrace();
}
}
}
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Login</display-name>
<servlet>
<servlet-name>Login</servlet-name>
<servlet-class>mycode.Login</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Login</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
+----------+----------+
| Username | Password |
+----------+----------+
| | |
+----------+----------+
<form action="login" method="GET">
<div>
<h4>Please enter your password and username</h4>
</div>
<div>
Username <input name="username" type="text" />
</div>
<div>
Password <input name="password" type="text" />
</div>
<div>
<input type="submit" value="Submit" />
</div>
</form>
用java和tomcat,我有一個簡單的表格,需要在一個用戶名中d密碼。我希望能夠從表單中檢索用戶名和密碼並將其插入到mysql數據庫中。但是,現在單擊表單上的提交按鈕後,什麼都不會發生,數據庫也不會更新。數據庫連接工作正常,所以我不知道現在的問題是什麼。任何幫助,將不勝感激。
你能展示簡單的表單代碼嗎? – alayor
如果您點擊提交併且什麼也沒有發生,您的html表單可能不工作。 – f1sh
@alayor我已經添加了表單 –