做了一個簡單的注冊頁面，下面是JAVA代碼，老是int rs = stmt.executeUpdate(upstr); 這一行出現(xiàn)錯誤

把sql打印出來看看，運(yùn)行一下你的sql，看能不能成功。

創(chuàng)新互聯(lián)公司主要從事做網(wǎng)站、網(wǎng)站建設(shè)、網(wǎng)頁設(shè)計、企業(yè)做網(wǎng)站、公司建網(wǎng)站等業(yè)務(wù)。立足成都服務(wù)托里,10年網(wǎng)站建設(shè)經(jīng)驗,價格優(yōu)惠、服務(wù)專業(yè),歡迎來電咨詢建站服務(wù):18980820575

把這個sql語句：insert into student(id,name,age,major,college)values('"+id+"','"+name+"','"+age+"','"+major+"','"+college+"')"; 直接在數(shù)據(jù)庫里運(yùn)行下看看能不能成功。

用java編程實現(xiàn)用戶注冊并進(jìn)行登錄操作

String username = "",password = "",passwordagain = ""; // 定義用戶名和密碼

將該變量等于為全局變量 或局部變量即可

用Java編寫用戶注冊界面，包含：用戶名、密碼、密碼確認(rèn)、郵箱，以及注冊和清空兩個按鈕。求高手，感謝!

界面建議用可視化來做，美觀且便捷。下面這個是完全用代碼寫的，僅供參考。

import javax.swing.*;

import java.awt.event.*;

import java.awt.*;

import java.sql.*;

public class Register extends JFrame {

JLabel jl1 = new JLabel("用戶名");

JTextField jt1 = new JTextField();

JLabel jl2 = new JLabel("郵箱");

JTextField jt2 = new JTextField();

JLabel jl3 = new JLabel("密碼");

JPasswordField jpw1 = new JPasswordField();

JLabel jl4 = new JLabel("密碼確認(rèn)");

JPasswordField jpw2 = new JPasswordField();

JButton register = new JButton("注冊");

JButton clean = new JButton("清空");

public Register(){

setLayout(new GridLayout(5,2));

add(jl1);

add(jt1);

add(jl2);

add(jt2);

add(jl3);

add(jpw1);

add(jl4);

add(jpw2);

add(register);

add(clean);

String name = jt1.getText();

String email = jt2.getText();

String pw = jpw1.getText();

register.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

try{

Class.forName("com.mysql.jdbc.Driver");

Connection con = DriverManager.getConnection("jdbc:mysql://localhost/db","root","");

Statement sta = con.createStatement();

sta.executeUpdate("INSERT INTO register VALUES(name,email,pw)");

JOptionPane.showMessageDialog(null,"注冊成功","提示",JOptionPane.INFORMATION_MESSAGE);

}

catch(Exception ex){

ex.getStackTrace();

}

}

});

clean.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e){

jt1.setText("");

jt2.setText("");

jpw1.setText("");

jpw2.setText("");

}

});

}

public static void main(String[] args){

Register frame = new Register();

frame.setTitle("用戶注冊");

frame.setLocationRelativeTo(null);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(400,400);

frame.setVisible(true);

}

}

java語言實現(xiàn)用戶注冊和登錄

//這個是我寫的，里面有連接數(shù)據(jù)庫的部分。你可以拿去參考一下

import java.awt.*;

import javax.swing.*;

import java.awt.event.*;

import java.sql.*;

class LoginFrm extends JFrame implements ActionListener// throws Exception

{

JLabel lbl1 = new JLabel("用戶名:");

JLabel lbl2 = new JLabel("密碼:");

JTextField txt = new JTextField(5);

JPasswordField pf = new JPasswordField();

JButton btn1 = new JButton("確定");

JButton btn2 = new JButton("取消");

public LoginFrm() {

this.setTitle("登陸");

JPanel jp = (JPanel) this.getContentPane();

jp.setLayout(new GridLayout(3, 2, 5, 5));

jp.add(lbl1);

jp.add(txt);

jp.add(lbl2);

jp.add(pf);

jp.add(btn1);

jp.add(btn2);

btn1.addActionListener(this);

btn2.addActionListener(this);

}

public void actionPerformed(ActionEvent ae) {

if (ae.getSource() == btn1) {

try {

Class.forName("com.mysql.jdbc.Driver");// mysql數(shù)據(jù)庫

Connection con = DriverManager.getConnection(

"jdbc:mysql://localhost/Car_zl", "root", "1");// 數(shù)據(jù)庫名為Car_zl，密碼為1

System.out.println("com : "+ con);

Statement cmd = con.createStatement();

String sql = "select * from user where User_ID='"

+ txt.getText() + "' and User_ps='"

+ pf.getText() + "'" ;

ResultSet rs = cmd

.executeQuery(sql);// 表名為user，user_ID和User_ps是存放用戶名和密碼的字段名

if (rs.next()) {

JOptionPane.showMessageDialog(null, "登陸成功！");

} else

JOptionPane.showMessageDialog(null, "用戶名或密碼錯誤！");

} catch (Exception ex) {

}

if (ae.getSource() == btn2) {

System.out.println("1111111111111");

//txt.setText("");

//pf.setText("");

System.exit(0);

}

}

}

public static void main(String arg[]) {

JFrame.setDefaultLookAndFeelDecorated(true);

LoginFrm frm = new LoginFrm();

frm.setSize(400, 200);

frm.setVisible(true);

}

}

求JAVA程序：用AWT組件設(shè)計一個填寫用戶注冊信息的程序，它要包含用戶ID、姓名、性別、學(xué)歷、愛好等基本信

import java.awt.BorderLayout;

import java.awt.Color;

import java.awt.FlowLayout;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.border.Border;

public class Test {

private JFrame frame;

private JTextField jid,jname,jsex,jedu,jlike;

private JLabel lid,lname,lsex,ledu,llike;

private JButton ok;

private JButton quit;

public Test(){//用戶ID、姓名、性別、學(xué)歷、愛好

frame=new JFrame("用戶注冊");

jid=new JTextField(10);

jname=new JTextField(10);

jsex=new JTextField(10);

jedu=new JTextField(10);

jlike=new JTextField(10);

lid=new JLabel("用戶id:");

lname=new JLabel("用戶名:");

lsex=new JLabel("性別:");

ledu=new JLabel("學(xué)歷:");

llike=new JLabel("愛好:");

ok=new JButton("注冊");

quit=new JButton("取消");

init();

showMe();

addEventHandler();

}

private void addEventHandler() {

quit.addActionListener(new ActionListener(){

public void actionPerformed(ActionEvent e) {

System.exit(0);

}

});

}

public void init(){

frame.setLayout(new BorderLayout(2,2));

Border titled = BorderFactory.createTitledBorder(BorderFactory

.createMatteBorder(5, 5, 5, 5, Color.CYAN));

JPanel center = new JPanel();

center.setBorder(titled);

center.setLayout(new GridLayout(5,2,9,10));

JPanel south=new JPanel();

south.setLayout(new FlowLayout());

center.add(lid);

center.add(jid);

center.add(lname);

center.add(jname);

center.add(lsex);

center.add(jsex);

center.add(ledu);

center.add(jedu);

center.add(llike);

center.add(jlike);

south.add(ok);

south.add(quit);

frame.add(center,BorderLayout.CENTER);

frame.add(south,BorderLayout.SOUTH);

}

public void showMe(){

frame.setLocation(500, 300);

frame.setSize(210,280);

frame.setResizable(false);//不能拖動大小

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public static void main(String[] args) {

new Test().showMe();

}

}