JAVA简单实现用户登录注册 |
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2019-07-03 19:52:32 本片代码主要有Java的桌面图形界面,Java I/O流,JDBC等等内容实现用户登录,在此地基础上添加了用户注册。代码相当的简陋,但是简单,容易理解。
数据库使用Start SampServer实现
源码: 加载数据库驱动,获取数据库连接 package 包位置 import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement;
public class JdbcRe {
static { String driverName="com.mysql.jdbc.Driver"; String url="jdbc:mysql://localhost:3306/abc"; String name="root"; String passwd="";
} public static void locadClass() throws ClassNotFoundException {
//加载驱动 String driverName="com.mysql.jdbc.Driver"; Class.forName(driverName);
}
public static Connection getConnection() throws Exception {
String url="jdbc:mysql://localhost:3306/abc"; String name="root"; String passwd=""; //获得连接 Connection conn = DriverManager.getConnection(url, name, passwd); return conn; } public static void result(Connection conn, Statement stam) {
if (conn != null) {
try { conn.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } conn = null; }
if (stam != null) {
try { stam.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } stam = null; } }
}
注册代码 package 包位置
import java.awt.Component; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.Statement;
import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JRadioButton; import javax.swing.JTextArea; import javax.swing.JTextField; import javax.swing.SwingConstants;
public class Register extends JFrame implements ActionListener{ JPanel p1,p2,p3,p4,p5,p6,p7,p8; JLabel l1,l2,l3,l4,l5,l6,l7,l8; JTextField j1,j4,j5,j6,j7; JPasswordField j2,j3; JRadioButton r1,r2; JCheckBox ck1,ck2,ck3,ck4; JTextArea adddr; JComboBox degree; JButton bu1,bu2; Connection conn; Statement stam;
public Register() { super("用户注册"); this.setLayout(new GridLayout(8,1)); p1 =new JPanel(new FlowLayout(FlowLayout.LEFT)); l1 =new JLabel("用户名:"); j1=new JTextField(18); p1.add(l1); p1.add(j1); this.add(p1);
p2 =new JPanel(new FlowLayout(FlowLayout.LEFT)); l2 =new JLabel("密码:"); j2=new JPasswordField(19); p2.add(l2); p2.add(j2); this.add(p2);
p3 =new JPanel(new FlowLayout(FlowLayout.LEFT)); l3 =new JLabel("确认密码:"); j3=new JPasswordField(16); p3.add(l3); p3.add(j3); this.add(p3);
p4 =new JPanel(new FlowLayout(FlowLayout.LEFT)); l4 =new JLabel("确性别:"); r1=new JRadioButton("男"); r2=new JRadioButton("女"); this.r1.setSelected(true); p4.add(l4); p4.add(r1); p4.add(r2); this.add(p4);
p5 =new JPanel(new FlowLayout(FlowLayout.LEFT)); l5 =new JLabel("爱好:"); ck1=new JCheckBox("阅读"); ck2=new JCheckBox("上网"); ck3=new JCheckBox("游泳"); ck4=new JCheckBox("旅游"); p5.add(l5); p5.add(ck1); p5.add(ck2); p5.add(ck3); p5.add(ck4); this.add(p5);
p6 =new JPanel(new FlowLayout(FlowLayout.LEFT)); l6 =new JLabel("地址:"); adddr =new JTextArea(2,19); p6.add(l6); p6.add(adddr); this.add(p6);
p7 =new JPanel(new FlowLayout(FlowLayout.LEFT)); l7 =new JLabel("学历:"); String str[]= {"小学","初中","高中","大学"}; degree=new JComboBox(str); p7.add(l7); p7.add(degree); this.add(p7);
p8 =new JPanel(new FlowLayout(FlowLayout.CENTER)); bu1=new JButton("注册");
bu2=new JButton("取消");
p8.add(bu1); p8.add(bu2); this.add(p8);
//创建监听 awtEvent();
}
public static void main(String[] args) { Register r=new Register(); r.setVisible(true); r.setSize(300, 400); r.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
} //监听 private void awtEvent() { //单选框互斥 r1.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub if(r1.isSelected()){ r2.setSelected(false); } } }); r2.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub if(r2.isSelected()){ r1.setSelected(false); } } }); //注册按钮监听 bu1.addActionListener(this); //取消按钮监听代码 bu2.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent e) { dispose(); } }); } @Override public void actionPerformed(ActionEvent e) { //获取选取的性别 String s1=null; if(r1.isSelected()) { s1="男"; }else { s1="女"; } //获取复选框中的值 String info =""; //通过面板属性名获取到该面板上的所有组件 for(Component c:p5.getComponents()){ //通过 instanceof方法筛选复选框组件 if(c instanceof JCheckBox){ //判断复选框组件是否被选中 if(((JCheckBox) c).isSelected()){ //获取该复选框组件信息 info += ((JCheckBox)c).getText(); } } } //下拉列表框中的值 String x = degree.getSelectedItem().toString(); //判断用户名和密码是否为空 judge(); //判断用户名是否重复 userName(); //两次密码是否一致 pwdName(); if(e.getSource()==bu1) { try {
//加载数据库驱动 conn=JdbcRe.getConnection(); //创建执行sql语句的对象 stam=conn.createStatement();
//编写sql语句 String sql="insert into user values('"+j1.getText()+"','"+j2.getText()+"','"+j3.getText()+"','"+s1+"','"+info+"','"+adddr.getText()+"','"+x+"')";
//执行sql语句 stam.execute(sql); //提示框 JOptionPane.showMessageDialog(null, "注册成功!!!!!"); //关闭注册界面窗体 this.dispose(); //打开登录窗体 User user=new User(); user.setVisible(true); user.setSize(600,500); user.setLocation(600,200); }catch (Exception e1) { e1.printStackTrace(); }finally { JdbcRe.result(conn, stam); } }
} //判断用户名密码是否为空 private void judge() { if (j1.getText().isEmpty()) {// 判断用户名是否为空 this.dispose(); JOptionPane.showMessageDialog(this, "用户名不能为空!", "警告信息", JOptionPane.WARNING_MESSAGE); Register r=new Register(); r.setVisible(true); r.setSize(300, 400); r.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); return;
} if (new String(j2.getText()).isEmpty()) {// 判断密码是否为空 this.dispose(); JOptionPane.showMessageDialog(this, "密码不能为空!", "警告信息", JOptionPane.WARNING_MESSAGE); Register r=new Register(); r.setVisible(true); r.setSize(300, 400); r.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); return; } if (new String(j3.getText()).isEmpty()) {// 判断确认密码是否为空 this.dispose(); JOptionPane.showMessageDialog(this, "确认密码不能为空!", "警告信息", JOptionPane.WARNING_MESSAGE); Register r=new Register(); r.setVisible(true); r.setSize(300, 400); r.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); return; } } //判断新的用户是否和原用户名有重复 private void userName() { try { conn=JdbcRe.getConnection(); stam=(Statement)conn.createStatement(); //编写SQL语句 String sql="select id num from User where id='"+j1.getText()+"'"; ResultSet rs=stam.executeQuery(sql); int num=0; if(rs!=null&&rs.next()) { num=rs.getInt("num"); System.out.println(num); } //判断用户名是否有相同 if (num>0) { JOptionPane.showMessageDialog(this, "用户名已使用,请重新选取","警告消息",JOptionPane.WARNING_MESSAGE); this.dispose(); Register r=new Register(); r.setVisible(true); r.setSize(300, 400); r.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); return; } } catch (Exception e) { e.printStackTrace(); } } //判断相关用户的密码和确认密码相同 private void pwdName() { if (j2.equals(j3)) { JOptionPane.showMessageDialog(this, "两次密码不相同","警告消息",JOptionPane.WARNING_MESSAGE); Register r=new Register(); r.setVisible(true); r.setSize(300, 400); r.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); return; }
}
} 用户登录界面代码 package 包位置
import java.awt.FlowLayout; import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.sql.Connection; import java.sql.ResultSet; import java.sql.Statement; import java.util.Random;
import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JRadioButton; import javax.swing.JTextField;
import chat.ChatRoomClient; import chat.ChatRoomServer; import cn.jhc.util.ComStr; import cn.jhc.util.RandomYzm; import cn.jhc.view.MainWinow;
public class User extends JFrame implements ActionListener,MouseListener{ String rYzm; JPanel p1,p2,p3,p4; JLabel j1,j2,j3,lyzm; JTextField t1,inYzm; JPasswordField t2; JButton b,b1,yzm,b2; JRadioButton jr1; Connection conn; Statement stam; public User() { super("用户登录界面"); this.setLayout(new GridLayout(4,1)); p1=new JPanel(null); p2=new JPanel(null); p3=new JPanel(null); p4=new JPanel(null); JLabel jl1=new JLabel("大傻逼登录系统"); jl1.setFont(new Font("宋体",Font.BOLD,20)); jl1.setBounds(180,0, 170, 80);
j1=new JLabel("用户名:"); j1.setFont(new Font("宋体",Font.BOLD,20)); j1.setBounds(90,0,110,30);
j2=new JLabel("密 码:"); j2.setFont(new Font("宋体",Font.BOLD,20)); j2.setBounds(90,80,110,30);
lyzm =new JLabel("验证码:"); lyzm.setFont(new Font("宋体",Font.BOLD,20)); lyzm.setBounds(90,45,110,30); //用于输入验证码的文本框 inYzm =new JTextField(); inYzm.setFont(new Font("宋体",Font.BOLD,20)); inYzm.setBounds(190,45,190,30);
//显示验证码的按钮 yzm=new JButton(); rYzm = RandomYzm.getYzm(); yzm.setFont(new Font("宋体",Font.BOLD,20)); yzm.setBounds(400,45,130,30); yzm.setOpaque(false); yzm.setBorder(BorderFactory.createCompoundBorder(null,null)); yzm.addActionListener(new ActionListener() {
@Override public void actionPerformed(ActionEvent evt) { yzmAction(evt);
} }); //用户名输入框 t1=new JTextField(9); t1.setFont(new Font("宋体",Font.BOLD,20)); t1.setBounds(190,0,190,30); //用户密码框 t2=new JPasswordField(9); t2.setFont(new Font("宋体",Font.BOLD,20)); t2.setBounds(190,80,190,30);
b=new JButton("登录"); b.setFont(new Font("宋体",Font.BOLD,20)); b.setBounds(90, 20,290, 30);
b1=new JButton("注册"); b1.setFont(new Font("宋体",Font.BOLD,20)); b1.setBounds(400, 0, 130, 30);
b2=new JButton("修改密码"); b2.setFont(new Font("宋体",Font.BOLD,20)); b2.setBounds(400, 80, 130, 30);
jr1=new JRadioButton("记住密码"); jr1.setFont(new Font("宋体",Font.BOLD,20)); jr1.setBounds(400,20, 160, 30); jr1.setSelected(false); p1.add(jl1);
p2.add(j1); p2.add(j2); p2.add(b1); p2.add(t1); p2.add(t2); p2.add(b2);
p3.add(lyzm); p3.add(inYzm); p3.add(yzm);
p4.add(b); p4.add(jr1); this.add(p1); this.add(p2); this.add(p3); this.add(p4); //创建监听 awtEvent(); //获取相应的用户名和密码 addPassword(); } private void awtEvent() { //登录按键监听 b.addActionListener(this); //注册按键监听 b1.addMouseListener(this); //修改密码监听 b2.addActionListener(this);
} //用于刷新验证码 private void yzmAction(ActionEvent evt) { //重新获取验证码 rYzm=RandomYzm.getYzm(); //设置显示的验证码 yzm.setText(rYzm); } private void addPassword() {
try { BufferedReader buf=new BufferedReader(new FileReader("user.txt")); String lien = buf.readLine(); if(lien!= null) { String[] users=lien.split(" "); t1.setText(users[0]); t2.setText(users[1]); } buf.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public static void main(String[] args) { User user=new User(); user.setVisible(true); user.setSize(600,500); user.setLocation(600,200); user.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public void actionPerformed(ActionEvent e) { if(e.getSource()==b) { try { conn=JdbcRe.getConnection(); stam=(Statement)conn.createStatement(); //编写SQL语句 String sql="select id,pwd from User where id='"+t1.getText()+"'and pwd='"+t2.getText()+"'"; //执行SQL语句 ResultSet rs=stam.executeQuery(sql); if(rs.next()) { String get_InYzm=inYzm.getText(); System.out.println("获取到相应账号"); if(ComStr.compar2Str(get_InYzm, rYzm)){ System.out.println("验证码正确"); if(jr1.isSelected()){ FileWriter fWriter=new FileWriter("user.txt"); fWriter.write(t1.getText()); fWriter.write(" "); fWriter.write(t2.getText()); fWriter.close(); } this.dispose();//关闭窗口 String name=JOptionPane.showInputDialog(this,"请输入你的昵称:"); String num="ww"; //记住密码功能中用流将数据传到username.txt中 FileWriter f=new FileWriter("username.txt"); f.write(num); f.write(" "); f.write(name); f.flush(); JOptionPane.showMessageDialog(null, "登录成功!"); }else { JOptionPane.showMessageDialog(this, "验证码错误"); inYzm.setText(""); } }else { JOptionPane.showMessageDialog(null, "密码或账号错误,登录失败!","标题",JOptionPane.ERROR_MESSAGE); t1.setText(""); t2.setText("");
} } catch (Exception e1) {
e1.printStackTrace(); }
} if(e.getSource()==b2) { this.dispose(); UserTrue userTrue=new UserTrue(); userTrue.setVisible(true); userTrue.setSize(370,300); userTrue.setLocation(300,300); }
}
@Override public void mouseClicked(MouseEvent e) { this.dispose(); Register register=new Register(); register.setVisible(true); register.setSize(300,300); register.setLocation(100,100); } @Override public void mousePressed(MouseEvent e) { // TODO Auto-generated method stub
} @Override public void mouseReleased(MouseEvent e) { // TODO Auto-generated method stub
} @Override public void mouseEntered(MouseEvent e) { // TODO Auto-generated method stub
} @Override public void mouseExited(MouseEvent e) { // TODO Auto-generated method stub
} } 用户是否存在验证 package 包位置;
import java.awt.FlowLayout; import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.FileWriter; import java.io.IOException; import java.sql.Connection; import java.sql.ResultSet; import java.sql.Statement;
import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JTextField;
public class UserTrue extends JFrame implements ActionListener{ JPanel p1; JLabel l1; JTextField j1;
JPanel p2; JLabel l2; JPasswordField j2;
JPanel p3; JLabel l3; JPasswordField j3;
JPanel p4; JButton bu1;
Connection conn; Statement stam;
public UserTrue() { super("用户验证"); this.setLayout(new GridLayout(4,1)); p1 =new JPanel(null); l1 =new JLabel("用 户 名:"); l1.setFont(new Font("宋体",Font.BOLD,20)); l1.setBounds(50, 20, 120, 30); j1=new JTextField(10); j1.setFont(new Font("宋体",Font.BOLD,20)); j1.setBounds(160, 20, 130, 30); p1.add(l1); p1.add(j1); this.add(p1);
p2 =new JPanel(null); l2 =new JLabel("密 码:"); l2.setFont(new Font("宋体",Font.BOLD,20)); l2.setBounds(50, 20, 120, 30); j2=new JPasswordField(10); j2.setFont(new Font("宋体",Font.BOLD,20)); j2.setBounds(160, 20, 130, 30); p2.add(l2); p2.add(j2);
this.add(p2);
p3 =new JPanel(null); l3 =new JLabel("确认密码:"); l3.setFont(new Font("宋体",Font.BOLD,20)); l3.setBounds(50, 20, 120, 30); j3=new JPasswordField(10); j3.setFont(new Font("宋体",Font.BOLD,20)); j3.setBounds(160, 20, 130, 30);
p3.add(l3); p3.add(j3); this.add(p3);
p4 =new JPanel(null); bu1=new JButton("确认"); bu1.addActionListener(this); bu1.setBounds(100, 20, 120,30); p4.add(bu1);
this.add(p4); } public static void main(String[] args) { UserTrue userTrue=new UserTrue(); userTrue.setVisible(true); userTrue.setSize(370,300); userTrue.setLocation(300,300); userTrue.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public void actionPerformed(ActionEvent e) { if(e.getSource()==bu1) { try { //加载驱动 conn=JdbcRe.getConnection(); //创建sql语句对象 stam=conn.createStatement(); //创建sql语句 String sql="select id,pwd,loginName from user where id='"+j1.getText()+"' and pwd='"+j2.getText()+"' and loginName='"+j3.getText()+"'"; //执行sql语句 ResultSet rs=stam.executeQuery(sql); if(rs.next()) { this.dispose(); UserModi userTrue=new UserModi(); userTrue.setVisible(true); userTrue.setSize(370,300); userTrue.setLocation(300,300); userTrue.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }else { j1.setText(""); j2.setText(""); j3.setText(""); JOptionPane.showMessageDialog(this, "用户名或密码不存在"); } } catch (Exception e1) { // TODO Auto-generated catch block e1.printStackTrace(); } try { FileWriter fileWriter=new FileWriter("nameExit.txt"); fileWriter.write(j1.getText()); fileWriter.flush(); fileWriter.close(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); }
}
} } 用户修改密码代码 Package包位置 import java.awt.Font; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.FileNotFoundException; import java.io.FileReader; import java.sql.Connection; import java.sql.ResultSet; import java.sql.Statement;
import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JTextField;
public class UserModi extends JFrame implements ActionListener{ JPanel p1,p2,p3,p4,p5; JLabel l1,l2,l3; JTextField j1; JPasswordField j2,j3; JButton bu1,bu2; Connection conn; Statement stam;
public UserModi() { super("用户修改"); this.setLayout(new GridLayout(4,1)); p1 =new JPanel(null); l1 =new JLabel("用 户 名:"); l1.setFont(new Font("宋体",Font.BOLD,20)); l1.setBounds(50, 20, 120, 30);
j1=new JTextField(); //j1=new JLabel("12"); j1.setFont(new Font("宋体",Font.BOLD,20)); j1.setBounds(160, 20, 130, 30); //j1.setEditable(false); p1.add(l1); p1.add(j1); this.add(p1);
try { BufferedReader bufferedReader=new BufferedReader(new FileReader("nameExit.txt")); String lenString=bufferedReader.readLine(); if (lenString!=null) { String[] aaStrings=lenString.split(" "); j1.setText(aaStrings[0]); }
// bufferedReader.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); }
p2 =new JPanel(null); l2 =new JLabel("密 码:"); l2.setFont(new Font("宋体",Font.BOLD,20)); l2.setBounds(50, 20, 120, 30); j2=new JPasswordField(10); j2.setFont(new Font("宋体",Font.BOLD,20)); j2.setBounds(160, 20, 130, 30); p2.add(l2); p2.add(j2); this.add(p2);
p3 =new JPanel(null); l3 =new JLabel("确认密码:"); l3.setFont(new Font("宋体",Font.BOLD,20)); l3.setBounds(50, 20, 120, 30); j3=new JPasswordField(10); j3.setFont(new Font("宋体",Font.BOLD,20)); j3.setBounds(160, 20, 130, 30); p3.add(l3); p3.add(j3); this.add(p3);
p4 =new JPanel(null); bu1=new JButton("确认"); bu1.addActionListener(this); bu1.setBounds(50, 20, 120,30); p4.add(bu1);
bu2=new JButton("退出"); bu2.setBounds(170, 20, 120,30); bu2.addActionListener(this); p4.add(bu2);
this.add(p4);
} public static void main(String[] args) { UserModi userTrue=new UserModi(); userTrue.setVisible(true); userTrue.setSize(370,300); userTrue.setLocation(300,300); userTrue.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } @Override public void actionPerformed(ActionEvent e) { if(e.getSource()==bu1) { try { //加载驱动 conn=JdbcRe.getConnection(); //创建sql语句对象 stam=conn.createStatement(); //创建sql语句
String sql="update user set pwd=('"+j2.getText()+"') , loginName=('"+j3.getText()+"') where id=('"+j1.getText()+"')"; //执行sql语句 stam.execute(sql); JOptionPane.showMessageDialog(null, "修改成功!!!!!"); //关闭修改窗体 this.dispose(); //打开登录窗体 User user=new User(); user.setVisible(true); user.setSize(600,500); user.setLocation(600,200); } catch (Exception e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } if (e.getSource()==bu2) { j1.setText(""); this.dispose();
}
}
} 验证码判断 Package 包位置 /** * 实现不区分大小写比较两字符串是否相等 * 输出为true false * @author Lenovo * */ public class ComStr { public static boolean compar2Str(String str1,String str2) { char[] ch1=str1.toCharArray();//将字符串str1转换为字符数组 char[] ch2=str2.toCharArray();//将字符串str2转换为字符数组 String newStr1="";//声明转换为小写的字符串str1 String newStr2="";//声明转换为小写的字符串str1 for (int i = 0; i < ch1.length; i++) { if(ch1[i]>=65&&ch1[i] ch2[i]+=32; } newStr2 +=ch2[i]; } //如果两相等将输出true if(newStr2.equals(newStr1)) { return true; } return false; } } 验证码随机 Package 包位置 /** * 用于随机产生长度为4的可变字符串 */
import java.util.Random;
public class RandomYzm {
public static String getYzm() { //定义长度为4 int lenght=4; //35个随机数 String untes="1,2,3,4,5,6,7,8,9,q,w,e,r,t,y,u,i,o,p,a,s,d,f,g,h,j,k,l,z,x,c,v,b,n,m"; //使用字符串将随机数分割开 String unte[]=untes.split(","); //对随机数的对象进行实例化 Random rd=new Random(); //设置用于存储产生的字符串 StringBuffer buf=new StringBuffer(); for (int i = 0; i < lenght; i++) { buf.append(unte[rd.nextInt(35)]); } return buf.toString(); } } |
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