Java寫提示注冊(cè)成功的方法如下：
創(chuàng)新互聯(lián)專業(yè)為企業(yè)提供通河網(wǎng)站建設(shè)、通河做網(wǎng)站、通河網(wǎng)站設(shè)計(jì)、通河網(wǎng)站制作等企業(yè)網(wǎng)站建設(shè)、網(wǎng)頁設(shè)計(jì)與制作、通河企業(yè)網(wǎng)站模板建站服務(wù)，10年通河做網(wǎng)站經(jīng)驗(yàn)，不只是建網(wǎng)站，更提供有價(jià)值的思路和整體網(wǎng)絡(luò)服務(wù)。
1、首先用戶注冊(cè)完成后，返回一個(gè)boolean值的變量；
2、利用Servlet類判斷這個(gè)變量，如果為true，跳轉(zhuǎn)到提示界面，提示用戶注冊(cè)成功，如果為false，跳轉(zhuǎn)到提示界面，提示用戶注冊(cè)失??；
3、具體代碼如下所示：
public?class?DemoServlet?extends?HttpServlet?{
public?void?doGet(HttpServletRequest?request,?HttpServletResponse?response)
throws?ServletException,?IOException?{
String?username?=?request.getParameter("username");
String?usepwd=?request.getParameter("usepwd");
boolean?flag?=?Dao.register(username,usepwd);//注冊(cè)方法
if(flag){
//提示注冊(cè)成功
request.getRequestDispatcher("/success.jsp").forward(request,?response);
}else{
//提示注冊(cè)失敗
request.getRequestDispatcher("/success.jsp").forward(request,?response);
}
}
public?void?doPost(HttpServletRequest?request,?HttpServletResponse?response)
throws?ServletException,?IOException?{
doGet(request,?response);
}
}
4、至此，就完成了提示注冊(cè)成功的功能。
分三個(gè)包，自己建個(gè)包，導(dǎo)進(jìn)去就ok了，數(shù)據(jù)庫是access的。
package 登錄;
import java.awt.EventQueue;
public class Cilent {
private JFrame frame;
private JTextField textField;
private JPasswordField passwordField;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Cilent window = new Cilent();
window.frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Cilent() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setTitle("登陸界面");
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
frame.setResizable(false);
JLabel lblNewLabel = new JLabel("用戶名");
lblNewLabel.setBounds(38, 43, 80, 34);
frame.getContentPane().add(lblNewLabel);
textField = new JTextField();
textField.setBounds(155, 42, 227, 37);
frame.getContentPane().add(textField);
textField.setColumns(10);
JLabel label = new JLabel("密 碼");
label.setBounds(38, 115, 80, 34);
frame.getContentPane().add(label);
passwordField = new JPasswordField();
passwordField.setBounds(155, 115, 227, 37);
frame.getContentPane().add(passwordField);
JButton btnNewButton = new JButton("登 錄");
btnNewButton.setBounds(60, 187, 115, 34);
frame.getContentPane().add(btnNewButton);
btnNewButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
UserCheck UC=new UserCheck(textField.getText(),String.valueOf(passwordField.getPassword()));
if(UC.getI()!=0) //有此用戶
{
frame.setVisible(false);
}
else
{
textField.setText("");
passwordField.setText("");
}
}
});
JButton button = new JButton("取 消");
button.setBounds(242, 187, 115, 34);
frame.getContentPane().add(button);
button.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
textField.setText("");
passwordField.setText("");
}
});
}
}
/*****************************************************************/
package 登錄;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import 操作處理.UsersCL;
/**@author 20111024
* 檢測登錄的用戶在數(shù)據(jù)庫中有無，若沒有，則提示沒有此用戶，
* 若有，則判斷級(jí)別：普通用戶還是管理員。
*/
public class UserCheck {
private int i=0; //用戶級(jí)別:0不是用戶、1是管理員、2是普通用戶
UserCheck(String name ,String password)
{
String jdriver="sun.jdbc.odbc.JdbcOdbcDriver";
String connectDB="jdbc:odbc:Students";
Statement stmt=null;
ResultSet rs=null;
Connection con=null;
try {
Class.forName(jdriver);
con=DriverManager.getConnection(connectDB);
stmt=con.createStatement();
String query="select * from users where name='"+name+"' and passwd='"+password+"'";
rs=stmt.executeQuery(query);
if(rs.next())
{
//數(shù)據(jù)庫中有此用戶，訪問成功
i=Integer.parseInt(rs.getString(3));
UsersCL UL=new UsersCL(i);
}
else
{
i=0; //沒有用戶是默認(rèn)是0級(jí)
}
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public int getI() {
return i;
}
}
/********************************************************************************************/
package 操作處理;
import java.awt.EventQueue;
public class UsersCL implements ActionListener{
private JFrame frame;
private JTextField textField;
private JTextField textField_1;
private JTextField textField_2;
private JTextField textField_3;
private int i=0;
private JLabel label_3;
private JTextField textField_4;
public UsersCL(int i) {
this.i=i;
frame = new JFrame();
frame.setTitle("用戶處理界面");
frame.setBounds(100, 100, 450, 300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
frame.setResizable(false);
frame.setVisible(true);
JLabel lblNewLabel = new JLabel("學(xué) 號(hào)");
lblNewLabel.setBounds(24, 32, 74, 29);
frame.getContentPane().add(lblNewLabel);
JLabel label = new JLabel("姓 名");
label.setBounds(24, 71, 74, 29);
frame.getContentPane().add(label);
JLabel label_1 = new JLabel("年 齡");
label_1.setBounds(24, 110, 74, 29);
frame.getContentPane().add(label_1);
label_3 = new JLabel("性 別");
label_3.setBounds(24, 149, 74, 29);
frame.getContentPane().add(label_3);
JLabel label_2 = new JLabel("狀 態(tài)");
label_2.setBounds(24, 195, 74, 29);
frame.getContentPane().add(label_2);
textField = new JTextField();
textField.setBounds(101, 34, 113, 25);
frame.getContentPane().add(textField);
textField.setColumns(10);
textField_1 = new JTextField();
textField_1.setColumns(10);
textField_1.setBounds(101, 73, 113, 25);
frame.getContentPane().add(textField_1);
textField_2 = new JTextField();
textField_2.setColumns(10);
textField_2.setBounds(101, 112, 113, 25);
frame.getContentPane().add(textField_2);
textField_3 = new JTextField();
textField_3.setEditable(false);
textField_3.setColumns(10);
textField_3.setBounds(101, 199, 288, 25);
frame.getContentPane().add(textField_3);
textField_4 = new JTextField();
textField_4.setColumns(10);
textField_4.setBounds(101, 149, 113, 25);
frame.getContentPane().add(textField_4);
if(1==i)
{
JButton btnNewButton = new JButton("追 加");
btnNewButton.setBounds(276, 41, 113, 29);
frame.getContentPane().add(btnNewButton);
btnNewButton.addActionListener(this);
btnNewButton.setActionCommand("追加");
JButton button_1 = new JButton("刪 除");
button_1.setBounds(276, 145, 113, 29);
frame.getContentPane().add(button_1);
button_1.addActionListener(this);
button_1.setActionCommand("刪除");
}
JButton button = new JButton("查 詢");
button.setBounds(276, 91, 113, 29);
frame.getContentPane().add(button);
button.addActionListener(this);
button.setActionCommand("查詢");
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String name,age,sex,query=null;
int num,age1,count=0;
num=Integer.parseInt(textField.getText());
name=textField_1.getText();
age1=Integer.parseInt(textField_2.getText());
sex=textField_4.getText();
if(e.getActionCommand().equals("追加"))
{
query="insert into students values("+num+","+"'"+name+"',"+age1+",'"+sex+"');";
count=1;
}
else if(e.getActionCommand().equals("查詢"))
{
query="select * from students where XSB="+num+";";
count=2;
}
else if(e.getActionCommand().equals("刪除"))
{
query="delete from students where XSB="+num+" and name="+"'"+name+"'";
count=3;
}
Statement stmt=null;
ResultSet rs=null;
Connection con=null;
String jdriver="sun.jdbc.odbc.JdbcOdbcDriver";
String connectDB="jdbc:odbc:Students";
String query1=null;
try {
Class.forName(jdriver);
con=DriverManager.getConnection(connectDB);
stmt=con.createStatement();
if(count==1)
{
query1="select * from students where XSB="+num+";";
rs=stmt.executeQuery(query1);
if(rs.next())
textField_3.setText("已經(jīng)由此記錄，不能追加！");
else
{
stmt.executeUpdate(query);
textField_3.setText("已經(jīng)追加完成！");
}
}
else if(2==count)
{
stmt.executeQuery(query);
rs=stmt.executeQuery(query);
if(rs.next())
{
textField_3.setText("已查找到此記錄！");
}
else
{
textField_3.setText("沒有此記錄，可以追加！");
}
}
else if(3==count)
{
query1="select * from students where XSB="+num+" and name="+"'"+name+"'";
rs=stmt.executeQuery(query1);
if(rs.next())
{
stmt.executeUpdate(query);
textField_3.setText("已刪除此記錄！");
}
else
textField_3.setText("無此記錄！");
}
} catch (ClassNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (SQLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
finally{
//關(guān)閉資源
if(stmt!=null){
try {
stmt.close();
} catch (Exception e2) {
// TODO: handle exception
}
stmt=null;
}
if(con!=null){
try {
con.close();
} catch (Exception e2) {
// TODO: handle exception
}
con=null;
}
}
}
}
package com.action;
import java.util.List;
import java.util.Map;
import org.apache.struts2.ServletActionContext;
import com.dao.TAdminDAO;
import com.model.TAdmin;
import com.opensymphony.xwork2.ActionSupport;
import com.util.Pagination;
public class adminAction extends ActionSupport
{
private int userId;//用戶id
private String userName;//用戶名
private String userPw;//用戶密碼
private String message;
private String path;
private int index=1;
private TAdminDAO adminDAO;//dao聲明
public String adminAdd()//增加用戶方法
{
TAdmin admin=new TAdmin();
admin.setUserName(userName);
admin.setUserPw(userPw);
adminDAO.save(admin);//調(diào)用dao方法
this.setMessage("操作成功");
this.setPath("adminManage.action");
return "succeed";//返回值
}
public String adminManage()//查找所有管理員
{
List adminList=adminDAO.findAll();
Map request=(Map)ServletActionContext.getContext().get("request");
request.put("adminList", adminList);//將列表存入adminList
return ActionSupport.SUCCESS;
}
public String adminManageFenye()//管理員列表的分頁查詢
{
List adminList=adminDAO.findAll();
int pageSize=3;
int fromIndex = (index - 1) * pageSize;
int toIndex = Math.min(fromIndex + pageSize, adminList.size());
List adminListFenye = adminList.subList(fromIndex, toIndex);
Pagination p = new Pagination();//創(chuàng)建 分頁對(duì)象
p.setIndex(index);//設(shè)置頁數(shù)
p.setPageSize(pageSize);
p.setTotle(adminList.size());//設(shè)置總共的條數(shù)
p.setData(adminListFenye);//設(shè)置數(shù)據(jù)
p.setPath("adminManageFenye.action?");//跳轉(zhuǎn)的路徑
Map request=(Map)ServletActionContext.getContext().get("request");
request.put("page", p);
return ActionSupport.SUCCESS;
}
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