如何在servlet中注冊頁面

Question

用於將值插入注冊表的 Java Servlet代碼：

package mypackage;  

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.mysql.jdbc.PreparedStatement;

public class Register extends HttpServlet {


    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://localhost:3306/test";
    static final String USER = "root";
    static final String PASS = "";
    Connection conn = null;
    Statement stmt = null;
    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {


        response.setContentType("text/html");
        PrintWriter out = response.getWriter();

        String name=request.getParameter("userName");
        String pass=request.getParameter("userPass");
        String email=request.getParameter("userEmail");
        String ccountry=request.getParameter("userCountry");

        try {
            Class.forName("com.mysql.jdbc.Driver");
        conn = DriverManager.getConnection(DB_URL, USER, PASS);

        stmt=conn.createStatement();
//      String sql="insert into test values(?,?,?,?)";
        java.sql.PreparedStatement ps=conn.prepareStatement("insert into registraion values(?,?,?,?)");

        ps.setString(1,name);
        ps.setString(2,pass);
        ps.setString(3,email);
        ps.setString(4,ccountry);
        int i=ps.executeUpdate();
        if(i>0)
        out.print("You are successfully registered...");


        } catch (ClassNotFoundException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        } catch (SQLException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }



    }
}

在我的表格中有5個字段，如下所示。

id(primary key ,auto generate)
name
pass
email
country

但是它沒有在注冊表中插入值。 我需要在注冊表上插入值。

請幫我。

Answer 1

我相信插入語句中的表名拼寫錯誤。

java.sql.PreparedStatement ps=conn.prepareStatement("insert into registraion values(?,?,?,?)");

將其更改為以下應該可以。：

java.sql.PreparedStatement ps=conn.prepareStatement("insert into registration values(?,?,?,?)");