search
HomeDatabaseMysql Tutorialjava swing mysql 下面的代码无法连接到数据库,插入数据

swingmysqljava

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;

class Test
{
/*private String driver="com.mysql.jdbc.Driver";
private String url="jdbc:mysql://localhost:3306/technology";
private String user="root";
private String pass="root";*/

<code>JFrame f;Dialog d1,d2,r_interface;JButton jb1,jb2,b3,b4,b5,r_inquire,r_insert,r_delete;JLabel jl,l1,l2;TextField tf1;TextField tf2;Test(){    init();}public void init(){    /*try {        Class.forName(driver);    } catch (ClassNotFoundException e1) {        // TODO Auto-generated catch block        e1.printStackTrace();    }*/    f=new JFrame();    jl=new JLabel("江西农业大学三检工作系统");    jb1=new JButton("登陆");    jb2=new JButton("注册");    f.setVisible(true);    f.setBounds(400,200,400,300);    f.setLayout(null);    f.setResizable(false);    jb1.setBounds(110,130,70,30);    jb2.setBounds(200,130,70,30);    jl.setBounds(110,70,200,50);    f.add(jb1);    f.add(jb2);    f.add(jl);    d1=new Dialog(f,"用户登陆",true);    d2=new Dialog(f,"用户注册",true);    b3=new JButton("确定");    b4=new JButton("取消");                     //登陆界面的取消按钮    b5=new JButton("取消");                     //注册界面的取消按钮    myevent();}public void myevent(){    f.addWindowListener(new WindowAdapter()             //窗口退出事件监听    {        public void windowClosing(WindowEvent e)        {            System.exit(0);        }    });    d1.addWindowListener(new WindowAdapter()                    {        public void windowClosing(WindowEvent e)        {            d1.setVisible(false);        }    });    d2.addWindowListener(new WindowAdapter()                    {        public void windowClosing(WindowEvent e)        {            d2.setVisible(false);        }    });    b3.addActionListener(new ActionListener()    //登陆界面的确定    {        public void actionPerformed(ActionEvent e)        {            dlcg();        }    });    b4.addActionListener(new ActionListener()    {        public void actionPerformed(ActionEvent e)        {            d1.setVisible(false);        }    });    b5.addActionListener(new ActionListener()    {        public void actionPerformed(ActionEvent e)        {            d2.setVisible(false);        }    });    jb1.addActionListener(new ActionListener()    {        public void actionPerformed(ActionEvent e)        {            denglu();        }    });    jb2.addActionListener(new ActionListener()    {        public void actionPerformed(ActionEvent e)        {            zhuce();        }    });}public void dlcg(){    r_interface=new Dialog(f,"登陆成功",true);    r_inquire=new JButton("查询");    r_insert=new JButton("插入");    r_delete=new JButton("删除");    r_interface.setLayout(null);    r_interface.add(r_inquire);    r_inquire.setBounds(80,60,120,30);    r_interface.setVisible(true);    Connection conn = null;    PreparedStatement psta=null;    String z_user=String.valueOf(tf1.getText());    String z_pass=String.valueOf(tf2.getText());    try {        Class.forName("com.mysql.jdbc.Driver");        conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb","root","root");        psta = conn.prepareStatement("insert into teacher (tname,tage) values (?, ?)");        psta.setString(1,z_user);        psta.setString(2,z_pass);        psta.executeUpdate();    } catch(ClassNotFoundException e) {        e.printStackTrace();    }    catch(SQLException e) {        e.printStackTrace();    }    finally {        try {            if(conn != null) {                conn.close();            }            if(psta != null) {                psta.close();            }        } catch(SQLException e) {            e.printStackTrace();        }    }    /*String z_user=tf1.getText();    String z_pass=tf2.getText();    Connection cn = null;    PreparedStatement pst = null;    try {        String sql="insert into register (r_account,r_password) values (?, ?)";        cn = DriverManager.getConnection(url,user,pass);        pst = cn.prepareStatement(sql);        pst.setString(1,z_user);        pst.setString(2,z_pass);        pst.executeUpdate();    } catch(SQLException e) {        e.printStackTrace();    } finally {        try {            if(pst!=null) {                pst.close();            }            if(cn!=null) {                cn.close();            }        } catch(SQLException e) {            e.printStackTrace();          }    }    */}public void denglu(){    l1=new JLabel("用户名");    l2=new JLabel("密    码");    tf1=new TextField();    tf2=new TextField();    tf2.setEchoChar('*');    d1.setBounds(470,240,260,230);    d1.setLayout(null);    d1.setResizable(false);    d1.add(l1);    d1.add(l2);    d1.add(b3);    d1.add(b4);    d1.add(tf1);    d1.add(tf2);    tf1.setBounds(80,60,120,30);    tf2.setBounds(80,100,120,30);    tf1.setFont(new Font("宋体",1,20));    tf2.setFont(new Font("宋体",1,20));    b3.setBounds(50,150,70,30);    b4.setBounds(150,150,70,30);    l1.setBounds(20,60,50,30);    l2.setBounds(20,100,50,30);    d1.setVisible(true);        }public void zhuce(){    l1=new JLabel("注册名");    l2=new JLabel("密    码");    //b3=new JButton("确定");    tf1=new TextField();    tf2=new TextField();    tf2.setEchoChar('*');    d2.setBounds(470,240,260,230);    d2.setLayout(null);    d2.setResizable(false);    d2.add(l1);    d2.add(l2);    d2.add(b3);    d2.add(b5);    d2.add(tf1);    d2.add(tf2);    tf1.setBounds(80,60,120,30);    tf2.setBounds(80,100,120,30);    tf1.setFont(new Font("宋体",1,20));    tf2.setFont(new Font("宋体",1,20));    b3.setBounds(50,150,70,30);    b5.setBounds(150,150,70,30);    l1.setBounds(20,60,50,30);    l2.setBounds(20,100,50,30);    d2.setVisible(true);}public static void main(String[] args){    Connection conn = null;    PreparedStatement psta=null;    new Test(); }</code>

}

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Reduce the use of MySQL memory in DockerReduce the use of MySQL memory in DockerMar 04, 2025 pm 03:52 PM

This article explores optimizing MySQL memory usage in Docker. It discusses monitoring techniques (Docker stats, Performance Schema, external tools) and configuration strategies. These include Docker memory limits, swapping, and cgroups, alongside

How do you alter a table in MySQL using the ALTER TABLE statement?How do you alter a table in MySQL using the ALTER TABLE statement?Mar 19, 2025 pm 03:51 PM

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

How to solve the problem of mysql cannot open shared libraryHow to solve the problem of mysql cannot open shared libraryMar 04, 2025 pm 04:01 PM

This article addresses MySQL's "unable to open shared library" error. The issue stems from MySQL's inability to locate necessary shared libraries (.so/.dll files). Solutions involve verifying library installation via the system's package m

Run MySQl in Linux (with/without podman container with phpmyadmin)Run MySQl in Linux (with/without podman container with phpmyadmin)Mar 04, 2025 pm 03:54 PM

This article compares installing MySQL on Linux directly versus using Podman containers, with/without phpMyAdmin. It details installation steps for each method, emphasizing Podman's advantages in isolation, portability, and reproducibility, but also

What is SQLite? Comprehensive overviewWhat is SQLite? Comprehensive overviewMar 04, 2025 pm 03:55 PM

This article provides a comprehensive overview of SQLite, a self-contained, serverless relational database. It details SQLite's advantages (simplicity, portability, ease of use) and disadvantages (concurrency limitations, scalability challenges). C

Running multiple MySQL versions on MacOS: A step-by-step guideRunning multiple MySQL versions on MacOS: A step-by-step guideMar 04, 2025 pm 03:49 PM

This guide demonstrates installing and managing multiple MySQL versions on macOS using Homebrew. It emphasizes using Homebrew to isolate installations, preventing conflicts. The article details installation, starting/stopping services, and best pra

How do I configure SSL/TLS encryption for MySQL connections?How do I configure SSL/TLS encryption for MySQL connections?Mar 18, 2025 pm 12:01 PM

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)?What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)?Mar 21, 2025 pm 06:28 PM

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

DVWA

DVWA

Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

SecLists

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.