java編寫一個更改密碼校驗程序，有兩個密碼框，一個用于輸入新密碼，另一個請輸入確認密碼……

import?java.awt.event.ActionEvent;

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import?java.awt.event.ActionListener;

import?javax.swing.JButton;

import?javax.swing.JDialog;

import?javax.swing.JLabel;

import?javax.swing.JOptionPane;

import?javax.swing.JPanel;

import?javax.swing.JTextField;

import?javax.swing.WindowConstants;

public?class?keyPassword?extends?JDialog{

private?JLabel?jl1?=?new?JLabel("password:");

private?JLabel?jl2?=?new?JLabel("確認密碼");

private?JTextField?pwd1?=?new?JTextField(18);

private?JTextField?pwd2?=?new?JTextField(18);

private?JButton?sure?=?new?JButton("確定");

private?JPanel?jp1?=?new?JPanel();

public?keyPassword(){

setVisible(true);

setSize(300,?150);

setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

jp1.add(jl1);

jp1.add(pwd1);

jp1.add(jl2);

jp1.add(pwd2);

jp1.add(sure);

sure.addActionListener(new?ActionListener()?{

@Override

public?void?actionPerformed(ActionEvent?arg0)?{

String?str?=?pwd1.getText();

String?str2?=?pwd2.getText();

if(str.equals("")?||?str2.equals("")){

JOptionPane.showMessageDialog(null,?"不能為空");

}else?if(str.equals(str2)){

JOptionPane.showMessageDialog(null,?"兩次密碼相同！");

}else{

JOptionPane.showMessageDialog(null,?"兩次密碼不相同！");

}

}

});

add(jp1);

}

public?static?void?main(String[]?args)?{

new?keyPassword();

}

}

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import?java.awt.event.ActionEvent;

import?java.awt.event.ActionListener;

import?javax.swing.JButton;

import?javax.swing.JDialog;

import?javax.swing.JLabel;

import?javax.swing.JOptionPane;

import?javax.swing.JPanel;

import?javax.swing.JPasswordField;

import?javax.swing.JTextField;

import?javax.swing.WindowConstants;

public?class?keyPassword?extends?JDialog{

private?JLabel?jl1?=?new?JLabel("password:");

private?JLabel?jl2?=?new?JLabel("確認密碼");

private?JPasswordField?jpf?=?new?JPasswordField(18);

private?JPasswordField?jpf2?=?new?JPasswordField(18);

private?JButton?sure?=?new?JButton("確定");

private?JPanel?jp1?=?new?JPanel();

public?keyPassword(){

setVisible(true);

setSize(300,?150);

setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);

jp1.add(jl1);

jp1.add(jpf);

jp1.add(jl2);

jp1.add(jpf2);

jp1.add(sure);

sure.addActionListener(new?ActionListener()?{

@Override

public?void?actionPerformed(ActionEvent?arg0)?{

char[]?str_?=?jpf.getPassword();

String?str=String.copyValueOf(str_);

char[]?str2_?=?jpf2.getPassword();

String?str2?=String.copyValueOf(str2_);

if(str.equals("")?||?str2.equals("")){

JOptionPane.showMessageDialog(null,?"不能為空");

}else?if(str.equals(str2)){

JOptionPane.showMessageDialog(null,?"兩次密碼相同！");

}else{

JOptionPane.showMessageDialog(null,?"兩次密碼不相同！");

}

}

});

add(jp1);

}

public?static?void?main(String[]?args)?{

new?keyPassword();

}

}

JavaScript的密碼確認代碼是什么？

只要用JavaScript判斷密碼輸入和密碼確認輸入時候一致即可。

table

tr

td valign="middle"div align="right"密碼：/div/td

tddiv align="left"

input type="password" name="userpassword" id="userpassword" /span id="error_userpassword"/span/div/td

/tr

tr

td valign="middle"div align="right"密碼確認：/div/td

tddiv align="left"

input type="password" name="userpassword_enter" id="userpassword_enter" /span id="error_userpassword_enter"/span/div/td

/tr

/table

script language="javascript1.2"

function vertify_userpassword(){

if (document.getElementById("userpassword").value==""){

document.getElementById("error_userpassword").innerText="請輸入密碼！";return false;}

else

{document.getElementById("error_userpassword").innerText="";return true}

}

/script

JSP中如何寫密碼輸入和確認密碼時正確與否的Java判斷代碼？

jsp中判斷兩次輸入的密碼是否相同的方法是通過js實現(xiàn)的。\x0d\x0a在兩個文本框里添加onchange事件，在文本框的內(nèi)容一發(fā)生變化時就觸發(fā)該事件，而判斷就寫在這個事件之內(nèi)就可以了。\x0d\x0a\x0d\x0a \x0d\x0afunction check()\x0d\x0a{\x0d\x0a\x0d\x0aif (document.form1.username.value==""){\x0d\x0aalert("請輸入登錄賬號!");\x0d\x0areturn false;\x0d\x0a}\x0d\x0aif (document.form1.passwords.value==""){\x0d\x0aalert("請輸入登錄密碼!");\x0d\x0areturn false;\x0d\x0a}\x0d\x0aif (document.form1.password.value==""){\x0d\x0aalert("請輸入重復(fù)密碼!");\x0d\x0areturn false;\x0d\x0a}\x0d\x0aif (document.form1.password.value!=document.form1.passwords.value){\x0d\x0aalert("對不起!重復(fù)密碼不等于登錄密碼");\x0d\x0areturn false;\x0d\x0a}\x0d\x0a\x0d\x0areturn true; \x0d\x0a\x0d\x0a}\x0d\x0a \x0d\x0a\x0d\x0a