小程序登录java代码 小程序登录java代码错误

java登录小程序

class Test{

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public boolean say(String name, String mima){

if(name.equals("admin")mima.equals("admin111")){

return true;

}else {

return false;

}

}

}

class Test1{

private String[] s;

public Test1(String s[]){

this.s = s;

}

public String sa(){

Test t = new Test();

this.print();

String name = s[0];

String mima = s[1];

String w = null;

if(t.say(name,mima)){

w = "欢迎"+name+"光临";

}else{

w = "用户密码错误";

}

return w ;

}

public void print(){

if(this.s.length != 2){

System.out.println("格式错误，程序退出");

System.out.println("格式为：java Add 用户名 密码");

System.exit(1);

}

}

}

public class Add{

public static void main(String []args){

Test1 t = new Test1(args);

System.out.println(t.sa());

}

}

编译、执行主类。

Java后端小程序微信登录怎么写？？

其实还蛮简单的，可以说一搜一大把，下面说下两种方式。

自行开发

主要就是通过小程序端直接请求登录获取到code(登录凭证)、如果需要获取用户手机号则需要再次授权需要iv和encryptedData，注意这里授权两次，也可以作为一次处理。

(1) 后端接收到小程序端请求的code，进行解密，可以参考微信小程序开发文档，拿到openId和session_key，这一步如果是已经注册的用户可以直接将后台分配的token一起组成对象存储到redis中，期限7-30天皆可，先从redis判定这个openId是否已经解析过且已存储为正式用户，是则直接返回系统的登录凭证完成登录。如果不是就需要走第二步。

(2)通过iv和encryptedData解析获取用户的手机号，完成解析后将用户信息存储，并一样存储到数据库和redis中，返回凭证。

2. 使用已经集成好的sdk，使用maven项目直接引入对象的jar即可。

举个栗子 weixin-java-miniapp 可以看下对应的文档说明，使用已经集成好的方法即可。

谁能给个JAVA的小程序代码，越小越好！

这是我晓得的最简单的java小程序代码了你可以看看:

package com.kenki.emp;

import javax.servlet.*;

import javax.servlet.http.*;

import java.io.*;

import java.util.*;

import java.sql.SQLException;

import java.sql.*;

public class emp extends HttpServlet {

private static final String CONTENT_TYPE = "text/html; charset=GBK";

//Initialize global variables

public void init() throws ServletException {

}

//Process the HTTP Get request

public void doGet(HttpServletRequest request, HttpServletResponse response) throws

ServletException, IOException {

response.setContentType(CONTENT_TYPE);

PrintWriter out = response.getWriter();

String code = request.getParameter("code");

String name = request.getParameter("name");

String pay = request.getParameter("pay");

System.out.println("empcode:" + code);

System.out.println("name:" + name);

System.out.println("pay:" + pay);

//创建驱动

new com.microsoft.jdbc.sqlserver.SQLServerDriver();

String strd =

"jdbc:microsoft:sqlserver://localhost:1433;databasename=emp_dates";

String username = "sa";

String pws = "";

try {

java.sql.Connection conn = java.sql.DriverManager.getConnection(

strd, username, pws);

String strs = "insert into emp values(?,?,?)";

java.sql.PreparedStatement pre = conn.prepareStatement(strs);

pre.setString(1, code);

pre.setString(2, name);

pre.setString(3, pay);

pre.execute();

pre.close();

conn.close();

//重定向至查询页面

out.println("成功保存！！");

response.sendRedirect("emp.html");

} catch (SQLException ss) {

ss.printStackTrace();

response.sendRedirect("/WebModule1/error.html");

}

}

//Process the HTTP Post request

public void doPost(HttpServletRequest request, HttpServletResponse response) throws

ServletException, IOException {

doGet(request, response);

}

//Clean up resources

public void destroy() {

}

}

java小程序源代码，简单点的，100多行，谁有啊？？

// My car shop.java

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.border.*;

public class carshop extends JFrame

{

// JPanel to hold all pictures

private JPanel windowJPanel;

private String[] cars = { "","阿斯顿马丁", "美洲虎", "凯迪拉克",

"罗孚", "劳斯莱斯","别克"};

private int[] jiage = { 0,150000, 260000, 230000,

140000, 290000, 150000};

// JLabels for first snack shown

private JLabel oneJLabel;

private JLabel oneIconJLabel;

// JLabels for second snack shown

private JLabel twoJLabel;

private JLabel twoIconJLabel;

// JLabels for third snack shown

private JLabel threeJLabel;

private JLabel threeIconJLabel;

// JLabels for fourth snack shown

private JLabel fourJLabel;

private JLabel fourIconJLabel;

// JLabels for fifth snack shown

private JLabel fiveJLabel;

private JLabel fiveIconJLabel;

// JLabels for sixth snack shown

private JLabel sixJLabel;

private JLabel sixIconJLabel;

// JTextField for displaying snack price

private JTextArea displayJTextArea;

// JLabel and JTextField for user input

private JLabel inputJLabel;

private JComboBox selectCountryJComboBox;

private JLabel inputJLabel2;

private JTextField inputJTextField2;

// JButton to enter user input

private JButton enterJButton;

//JButton to clear the components

private JButton clearJButton;

// no-argument constructor

public carshop()

{

createUserInterface();

}

// create and position GUI components; register event handlers

private void createUserInterface()

{

// get content pane for attaching GUI components

Container contentPane = getContentPane();

// enable explicit positioning of GUI components

contentPane.setLayout( null );

// set up windowJPanel

windowJPanel = new JPanel();

windowJPanel.setBounds( 10, 20, 340, 200 );

windowJPanel.setBorder( new LineBorder( Color.BLACK ) );

windowJPanel.setLayout( null );

contentPane.add( windowJPanel );

// set up oneIconJLabel

oneIconJLabel = new JLabel();

oneIconJLabel.setBounds( 10, 20, 100, 65 );

oneIconJLabel.setIcon( new ImageIcon( "images/阿斯顿马丁.jpg" ) );

windowJPanel.add( oneIconJLabel );

// set up oneJLabel

oneJLabel = new JLabel();

oneJLabel.setBounds( 10, 60, 100, 70 );

oneJLabel.setText( "阿斯顿马丁" );

oneJLabel.setHorizontalAlignment( JLabel.CENTER );

windowJPanel.add( oneJLabel );

// set up twoIconJLabel

twoIconJLabel = new JLabel();

twoIconJLabel.setBounds( 120, 20, 100, 65 );

twoIconJLabel.setIcon( new ImageIcon( "images/美洲虎.jpg" ) );

windowJPanel.add( twoIconJLabel );

// set up twoJLabel

twoJLabel = new JLabel();

twoJLabel.setBounds( 110, 60, 100, 70 );

twoJLabel.setText( "美洲虎" );

twoJLabel.setHorizontalAlignment( JLabel.CENTER );

windowJPanel.add( twoJLabel );

// set up threeIconJLabel

threeIconJLabel = new JLabel();

threeIconJLabel.setBounds( 230, 20, 100, 65 );

threeIconJLabel.setIcon( new ImageIcon(

"images/凯迪拉克.jpg" ) );

windowJPanel.add( threeIconJLabel );

// set up threeJLabel

threeJLabel = new JLabel();

threeJLabel.setBounds( 230, 60, 100, 70);

threeJLabel.setText( "凯迪拉克" );

threeJLabel.setHorizontalAlignment( JLabel.CENTER );

windowJPanel.add( threeJLabel );

// set up fourIconJLabel

fourIconJLabel = new JLabel();

fourIconJLabel.setBounds( 10, 100, 100, 65 );

fourIconJLabel.setIcon( new ImageIcon( "images/罗孚.jpg" ) );

windowJPanel.add( fourIconJLabel );

// set up fourJLabel

fourJLabel = new JLabel();

fourJLabel.setBounds( 10, 150, 50, 70 );

fourJLabel.setText( "罗孚" );

fourJLabel.setHorizontalAlignment( JLabel.CENTER );

windowJPanel.add( fourJLabel );

// set up fiveIconJLabel

fiveIconJLabel = new JLabel();

fiveIconJLabel.setBounds( 120, 100, 100, 65 );

fiveIconJLabel.setIcon( new ImageIcon(

"images/劳斯莱斯.jpg" ) );

windowJPanel.add( fiveIconJLabel );

// set up fiveJLabel

fiveJLabel = new JLabel();

fiveJLabel.setBounds( 110, 150, 100, 70 );

fiveJLabel.setText( "劳斯莱斯" );

fiveJLabel.setHorizontalAlignment( JLabel.CENTER );

windowJPanel.add( fiveJLabel );

// set up sixIconJLabel

sixIconJLabel = new JLabel();

sixIconJLabel.setBounds( 230, 100, 100, 65 );

sixIconJLabel.setIcon( new ImageIcon( "images/别克.jpg" ) );

windowJPanel.add( sixIconJLabel );

// set up sixJLabel

sixJLabel = new JLabel();

sixJLabel.setBounds( 230, 150, 100, 70 );

sixJLabel.setText( "别克" );

sixJLabel.setHorizontalAlignment( JLabel.CENTER );

windowJPanel.add( sixJLabel );

// set up enterJButton

enterJButton = new JButton();

enterJButton.setBounds( 390, 160, 135, 30 );

enterJButton.setText( "Enter" );

contentPane.add( enterJButton );

enterJButton.addActionListener(

new ActionListener() // anonymous inner class

{

// event handler called when enterJButton is clicked

public void actionPerformed( ActionEvent event )

{

enterJButtonActionPerformed( event );

}

} // end anonymous inner class

); // end call to addActionListener

// set up clearJButton

clearJButton = new JButton();

clearJButton.setBounds( 390, 200, 135, 30 );

clearJButton.setText( "Clear" );

contentPane.add( clearJButton );

// set up inputJLabel

inputJLabel = new JLabel();

inputJLabel.setBounds( 390, 25, 135, 25 );

inputJLabel.setText( "Please make selection:" );

contentPane.add( inputJLabel );

selectCountryJComboBox = new JComboBox( cars );

selectCountryJComboBox.setBounds( 390, 50, 135, 21 );

selectCountryJComboBox.setMaximumRowCount( 3 );

contentPane.add( selectCountryJComboBox );

// set up inputJTextField

inputJLabel2 = new JLabel();

inputJLabel2.setBounds( 390, 80, 150, 20 );

inputJLabel2.setText( "Input the Numble:" );

contentPane.add( inputJLabel2 );

// set up inputJTextField

inputJTextField2 = new JTextField();

inputJTextField2.setBounds( 390, 100, 135, 25 );

inputJTextField2.setHorizontalAlignment( JTextField.RIGHT );

contentPane.add( inputJTextField2 );

clearJButton.addActionListener(

new ActionListener() // anonymous inner class

{

// event handler called when clearJButton is clicked

public void actionPerformed( ActionEvent event )

{

clearJButtonActionPerformed( event );

}

} // end anonymous inner class

);

// set up displayJTextField

displayJTextArea = new JTextArea();

displayJTextArea.setBounds( 10, 237,515, 70 );

displayJTextArea.setEditable( false );

contentPane.add( displayJTextArea );

// set properties of application's window

setTitle( "My car Shop" ); // set title bar string

setSize( 550, 360 ); // set window size

setVisible( true ); // display window

} // end method createUserInterface

private void clearJButtonActionPerformed( ActionEvent event )

{

// clear the JTextFields

inputJTextField2.setText( "" );

displayJTextArea.setText("");

} // end method clearJButtonActionPerformed

private void enterJButtonActionPerformed( ActionEvent event )

{

double z;

double c;

int x;

int y;

x=selectCountryJComboBox.getSelectedIndex();

y=Integer.parseInt(inputJTextField2.getText());

double discountRate;

int amount = Integer.parseInt( inputJTextField2.getText());

switch (amount/5)

{

case 0:

discountRate = 0;

break;

case 1:

discountRate = 1;

break;

case 2:

discountRate = 2;

break;

case 3:

discountRate = 3;

break;

default:

discountRate = 4;

} // end switch statement

c=1-discountRate/100;

z=jiage[x]*y*c;

displayJTextArea.append("你选择的是："+cars[x]+"；"+

"它的单价是："+jiage[x]+"；" +"你购买该产品的数量是："+y+"，" +"\n"+"该数量的折扣是："

+discountRate + " %"+"；"+"本次消费的总价格是："+z+"元"+"!"+"\n");

}

public static void main( String args[] )

{

carshop application = new carshop();

application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

} // end method main

} // end class carshop