package Servlet;
import java.sql.Connection;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.swing.*;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
@WebServlet(name = "LoginServlet")
public class RegisterServlet extends HttpServlet {
public RegisterServlet() {
super();
}
@Override
public void destroy() {
super.destroy();
}
public void ww() {
String msg = "注册成功!";
int type = JOptionPane.YES_NO_OPTION;
JOptionPane.showMessageDialog(null, msg, title, type);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
JDBC jdbc = new JDBC();
Connection con = null;
PreparedStatement ps = null;
String username=new String(request.getParameter("username").getBytes("ISO-8859-1"),"UTF-8");
String PASSWORD=new String(request.getParameter("userpassword").getBytes("ISO-8859-1"),"UTF-8");
String email=new String(request.getParameter("Email").getBytes("ISO-8859-1"),"UTF-8");
try {
con = jdbc.getConnection();
String sql = "insert into Usersd(username,PASSWORD,email) values (?,?,?)";
ps = con.prepareStatement(sql);
ps.setString(1, username);
ps.setString(2,password);
ps.setString(3, email);
int row = ps.executeUpdate();
wrong1();
} catch (SQLException e) {
e.printStackTrace();
}finally {
jdbc.closeAll(con,ps,null);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
}
package cn;
import java.sql.*;
public class JDBC {
//获取连接
public Connection getConnection() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
// 建立连接
conn = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/mysql", "root", "root");
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
public void closeAll(Connection con, PreparedStatement ps, ResultSet rs) {
//关闭资源,释放资源
if (rs != null) {
try {
rs.close();
} catch (SQLException e) {
rs = null;
}
}
if (ps != null) {
try {
ps.close();
} catch (SQLException e) {
ps = null;
}
}
if (con != null) {
try {
con.close();
} catch (SQLException e) {
rs = null;
}
}
}
}
![](https://img2020.cnblogs.com/blog/1701021/202006/1701021-20200620160141236-175955145.png)
![](https://img2020.cnblogs.com/blog/1701021/202006/1701021-20200620160153291-88825722.png)