Java Servlet Form Processing Guide

To receive form data in Java, you can use the doPost method of a Servlet to handle POST requests, or use the doGet method to handle GET requests. Here is an example of how to receive form data in Java.

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class MyServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 获取表单数据
        String username = request.getParameter("username");
        String password = request.getParameter("password");

        // 执行其他操作，如验证用户信息、处理业务逻辑等

        // 返回响应
        response.getWriter().write("Received form data: username=" + username + ", password=" + password);
    }
}

In the above example, the doPost method receives an HttpServletRequest object and an HttpServletResponse object as parameters. The HttpServletRequest object is used to retrieve form data, and the getParameter method can be used to obtain the value of form fields by specifying the parameter as the field’s name. The HttpServletResponse object is used to send response data.

Please note that the code above is just a simple example, and you can make appropriate modifications and extensions based on your specific needs.