java商户管理代码 java商城模板

用JAVA编程的通过SQL连接数据库的商品库存管理系统的源代码

package com.company.dao;

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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 BaseDao {

// 数据库驱动

String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";

//url

String url = "jdbc:sqlserver://数据库ip:端口号;databaseName=数据库名;";

//用户名

String uname = "数据库用户名";

//密码

String pwd = "数据库密码";

/**

* 获得连接对象

* @return

protected Connection getCon(){

//返回的连接

Connection con = null;

try {

//载入驱动

Class.forName(driver);

//得到连接

con = DriverManager.getConnection(url, uname, pwd);

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (SQLException e) {

e.printStackTrace();

}

return con;

}

/**

* 关闭数据库

* @param con

* @param stmt

* @param rs

protected void closeDB(Connection con, Statement stmt, ResultSet rs){

if(rs != null){

try {

//关闭结果集

rs.close();

rs = null;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

if(stmt != null){

try {

//关闭语句对象

stmt.close();

stmt = null;

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

if(con != null){

try {

//关闭连接对象

con.close();

con = null;

} catch (SQLException e) {

e.printStackTrace();

}

protected void closeDB(Connection con, PreparedStatement pstmt, ResultSet rs){

if(rs != null){

//关闭结果集

try {

rs.close();

rs = null;

} catch (SQLException e) {

e.printStackTrace();

}

if(pstmt != null){

try {

pstmt.close();

pstmt = null;

} catch (SQLException e) {

e.printStackTrace();

}

if(con != null){

try {

con.close();

con = null;

} catch (SQLException e) {

e.printStackTrace();

}

这个是我写的一个基本的连接sql2005数据库的代码,.! 不知道你能不能用,! 你看一下吧, 连接的时候需要sqljdbc.jar数据库驱动,!

用JAVA编写购物系统的代码是什么？（急）

算是最简单的吧

package cn.job01;

import java.util.Scanner;

public class Lx07 {

public static void choice() {

System.out.println("登陆菜单 ");

System.out.println("1登陆系统");

System.out.println("2退出");

}

static void choice1() {

System.out.println("购物管理系统客户信息");

System.out.println("1显示所有客户信息");

System.out.println("2添加客户信息");

System.out.println("3修改客户信息");

System.out.println("4查询客户信息");

}

static void choice2() {

System.out.println("购物管理系统真情回馈");

System.out.println("1幸运大放送");

System.out.println("2幸运抽奖");

System.out.println("3生日问候");

}

public static void main(String[] args) {

choice();

Scanner input = new Scanner(System.in);

System.out.println("请输入1or2");

int num = input.nextInt();

switch (num) {

case 1:

System.out.println("主菜单");

System.out.println("1客户信息管理");

System.out.println("2购物结算");

System.out.println("3真情回馈");

System.out.println("4注销");

break;

}

System.out.println("选择输入数字");

int num1 = input.nextInt();

switch (num1) {

case 1:

choice1();

break;

case 2:

System.out.println("购物结算");

break;

case 3:

choice2();

break;

case 4:

choice();

break;

}

java用户管理的代码中查询不了是哪出问题了

一)[DLS_DEAD_LOCAL_STORE]

描述： Dead store to 未使用的局部变量

解决方法：局部变量定义后未使用；实例化对象后又重新对该对象赋值

(二) [ST_WRITE_TO_STATIC_FROM_INSTANCE_METHOD]

描述：Write to static field 通过实例方法更新静态属性

常见于常量类，直接通过类名.常量名获取的方式违背了封装的原则，findbugs不提倡使用，而如果将常量改成静态成员变量，又因为spring不支持静态注入导致不能实现，解决方法是非静态的setter调用静态的setter方法给静态成员变量赋值。

解决方法：

常量类F：

class F{

public static String a = “123”;

}

常量a改为静态成员变量，通过F.getA()获取，且由于spring不支持静态注入，改为：

class F{

private static String a;

public static Integer getA() {

return a;

}

public void setA(String a) {

setAValue(a);

}

public static void setAValue(String a) {

F.a = a;

}

(三) [BX_UNBOXING_IMMEDIATELY_REBOXED]

描述： Boxed value is unboxed and then immediately reboxed 装箱的值被拆箱，然后立刻重新装箱了

常见的是三目运算时，同时存在基本类型和包装类型。

解决方法：

Integer a = null;

//...

a = (a == null)?0:a;

此问题在于a不为null时，会被拆箱，赋值时再装箱。这是自动装箱拆箱的特性，只要运算中有不同类型，当涉及到类型转换时，编译器就会向下转型，再进行运算。修改方法，统一类型：

Integer a = null;

//...

a = (a == null)?Integer.valueOf(0):a;

(四) [SE_BAD_FIELD]

描述： Non-transient non-serializable instance field in serializable class在可序列化的类中存在不能序列化或者不能暂存的数据

解决方法：

方法1：序列化该对象

方法2：当采用struts2框架开发，不可避免的此问题会大量出现，因为ActionSupport实现了序列化接口，action继承了此类，而 service没序列化，所以在action中引用service对象时提示此错误，最简单的解决方法是将service对象声明成transient，即service不需要序列化

方法3(未验证)：To avoid java serialization you need to implement writeObject() and readObject() method in your Class and need to throw NotSerializableExceptionfrom those method.(action中实现这两个方法?)

private void writeObject(java.io.ObjectOutputStream stream) throws java.io.IOException {

throw new java.io.NotSerializableException( getClass().getName() );

}

private void readObject(java.io.ObjectInputStream stream) throws java.io.IOException, ClassNotFoundException {

throw new java.io.NotSerializableException( getClass().getName() );

}

(五) [NP_LOAD_OF_KNOWN_NULL_VALUE]

描述： Load of known null value加载已知是null的值

解决方法：已知方法参数为null是，直接传递null而不是参数名

(六) [REC_CATCH_EXCEPTION]

描述： Exception is caught when Exception is not thrown 过泛地捕获异常或捕获异常后未做任何处理

解决方法：异常分类捕获(至少要打印出此异常对象)

(七) [NP_NULL_PARAM_DEREF]

描述： Null passed for nonnull parameter 把空值传给了非空的参数

解决方法：增加非空判断

(八) [NP_IMMEDIATE_DEREFERENCE_OF_READLINE]

描述： Immediate dereference of the result of readLine() 立即引用了readLine()的结果

解决方法：判断readLine的结果是否为空

(九) [EI_EXPOSE_REP] 恶意代码漏洞

描述：may expose internal representation by returning getter方法返回引用类型

eclipse自动生成的引用类型(Object、数组、Date等)的getter、setter方法会得到或通过对可变对象的引用操作而暴露代码内部实现，解决方法很多，只要返回的或赋值的对象不是原引用对象即可。

解决方法：

以Date类型为例：

public Date getHappenTime() {

if(happenTime != null){

return (Date) happenTime.clone();

}

return null;

}

(十) [ EI_EXPOSE_REP2] 恶意代码漏洞

描述：may expose internal representation by storing an externally mutable object into setter方法返回引用类型

解决方法：

以Date类型为例：

public void setHappenTime(Date happenTime) {

if(happenTime != null){

this.happenTime = (Date) happenTime.clone();

}else{

this.happenTime = null;

}

亲有java语言写的超市管理系统课程设计和源代码吗，能给我吗

package untitled5;

import java.io.*;

import java.net.*;

import java.sql.*;

import java.lang.*;

import javax.sql.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import com.borland.jbcl.layout.*;

public class delbook extends JFrame {

JPanel contentPane;

XYLayout xYLayout1 = new XYLayout();

JLabel jLabel1 = new JLabel();

JLabel jLabel2 = new JLabel();

JLabel jLabel3 = new JLabel();

JTextField jTextField1 = new JTextField();

JLabel jLabel4 = new JLabel();

JTextField jTextField2 = new JTextField();

JLabel jLabel5 = new JLabel();

JTextField jTextField3 = new JTextField();

JLabel jLabel6 = new JLabel();

JTextField jTextField4 = new JTextField();

JButton jButton1 = new JButton();

//Construct the frame

public delbook() {

enableEvents(AWTEvent.WINDOW_EVENT_MASK);

try {

jbInit();

}

catch(Exception e) {

e.printStackTrace();

}

//Component initialization

private void jbInit() throws Exception {

contentPane = (JPanel) this.getContentPane();

jLabel1.setFont(new java.awt.Font("SansSerif", 0, 25));

jLabel1.setForeground(Color.red);

jLabel1.setText("超市管理系统");

contentPane.setLayout(xYLayout1);

this.setSize(new Dimension(500,400));

this.setTitle("超市管理系统");

jLabel2.setFont(new java.awt.Font("SansSerif", 0, 30));

jLabel2.setText("业务单位信息");

jLabel3.setFont(new java.awt.Font("SansSerif", 0, 25));

jLabel3.setText("产品编号");

jTextField1.setText("");

jLabel4.setFont(new java.awt.Font("SansSerif", 0, 25));

jLabel4.setText("公司名称");

jTextField2.setText("");

jLabel5.setFont(new java.awt.Font("SansSerif", 0, 25));

jLabel5.setText("订单号码");

jTextField3.setText("");

jLabel6.setFont(new java.awt.Font("SansSerif", 0, 25));

jLabel6.setText("电话");

jTextField4.setText("");

jButton1.setFont(new java.awt.Font("SansSerif", 0, 25));

jButton1.setText("提交");

jButton1.addActionListener(new delbook_jButton1_actionAdapter(this));

contentPane.add(jLabel1, new XYConstraints(179, 1, 153, 32));

contentPane.add(jLabel2, new XYConstraints(162, 33, -1, -1));

contentPane.add(jLabel3, new XYConstraints(83, 89, -1, -1));

contentPane.add(jTextField1, new XYConstraints(189, 88, 141, 36));

contentPane.add(jTextField2, new XYConstraints(189, 149, 142, 36));

contentPane.add(jLabel4, new XYConstraints(84, 148, -1, -1));

contentPane.add(jTextField3, new XYConstraints(188, 206, 143, 33));

contentPane.add(jLabel5, new XYConstraints(84, 204, -1, -1));

contentPane.add(jLabel6, new XYConstraints(84, 253, -1, -1));

contentPane.add(jTextField4, new XYConstraints(189, 260, 143, 36));

contentPane.add(jButton1, new XYConstraints(197, 318, -1, -1));

}

//Overridden so we can exit when window is closed

protected void processWindowEvent(WindowEvent e) {

super.processWindowEvent(e);

if (e.getID() == WindowEvent.WINDOW_CLOSING) {

System.exit(0);

}

void update() {

try {

//定义显示的字符串

String str1;

String str2;

String str3;

String str4;

str1 = jTextField1.getText();

str2 = jTextField2.getText();

str3 = jTextField3.getText();

str4 = jTextField4.getText();

//装载jdbc驱动程序

String driverName = "oracle.jdbc.OracleDriver";

Driver driver = (Driver) Class.forName(driverName).newInstance();

//连接数据库

Connection con = DriverManager.getConnection(

"jdbc:oracle:thin:@thsspc0791:1521:liuyong", "hr", "tongfang");

PreparedStatement pstmt = con.prepareStatement(

" insert Customer1('goodID','Name','PID','tel')values(?,?,?,?)");

pstmt.setString(1, str1);

pstmt.setString(2, str2);

pstmt.setString(1, str3);

pstmt.setString(4, str4);

ResultSet res = pstmt.executeQuery();

pstmt.close();

con.close();

}catch (InstantiationException e) {

System.out.println(e.getMessage());

}catch (IllegalAccessException e) {

System.out.println(e.getMessage());

}catch (ClassNotFoundException e) {

System.out.println(e.getMessage());

}catch (SQLException edd) {

edd.printStackTrace() ;

System.out.println(edd.getMessage());

}

void jButton1_actionPerformed(ActionEvent e) {

update();

}

class delbook_jButton1_actionAdapter implements java.awt.event.ActionListener {

delbook adaptee;

delbook_jButton1_actionAdapter(delbook adaptee) {

this.adaptee = adaptee;

}

public void actionPerformed(ActionEvent e) {

adaptee.jButton1_actionPerformed(e);

}

package untitled5;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import com.borland.jbcl.layout.*;

/**

* pTitle: /p

* pDescription: /p

* pCompany: /p

* @author not attributable

* @version 1.0

public class retur extends JFrame {

JPanel contentPane;

XYLayout xYLayout1 = new XYLayout();

JLabel jLabel1 = new JLabel();

//Construct the frame

public retur() {

enableEvents(AWTEvent.WINDOW_EVENT_MASK);

try {

jbInit();

}

catch(Exception e) {

e.printStackTrace();

}

//Component initialization

private void jbInit() throws Exception {

contentPane = (JPanel) this.getContentPane();

jLabel1.setFont(new java.awt.Font("SansSerif", 0, 20));

jLabel1.setForeground(Color.red);

jLabel1.setText("超市管理系统");

contentPane.setLayout(xYLayout1);

this.setSize(new Dimension(400, 300));

this.setTitle("超市管理系统");

contentPane.add(jLabel1, new XYConstraints(139, 1, 126, 33));

}

//Overridden so we can exit when window is closed

protected void processWindowEvent(WindowEvent e) {

super.processWindowEvent(e);

if (e.getID() == WindowEvent.WINDOW_CLOSING) {

System.exit(0);

}

package untitled5;

import java.io.*;

import java.net.*;

import java.sql.*;

import java.lang.*;

import javax.sql.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import com.borland.jbcl.layout.*;

import com.borland.dbswing.*;

//货品信息登记

public class Frame2 extends JFrame {

JPanel contentPane;

JLabel jLabel1 = new JLabel();

XYLayout xYLayout1 = new XYLayout();

JLabel jLabel2 = new JLabel();

JLabel jLabel3 = new JLabel();

JTextField jTextField1 = new JTextField();

JLabel jLabel4 = new JLabel();

JTextField jTextField2 = new JTextField();

JPanel jPanel1 = new JPanel();

XYLayout xYLayout2 = new XYLayout();

JScrollPane jScrollPane1 = new JScrollPane();

JLabel jLabel5 = new JLabel();

JTextField jTextField3 = new JTextField();

//Construct the frame

public Frame2() {

enableEvents(AWTEvent.WINDOW_EVENT_MASK);

try {

jbInit();

}

catch(Exception e) {

e.printStackTrace();

}

//Component initialization

private void jbInit() throws Exception {

contentPane = (JPanel) this.getContentPane();

contentPane.setLayout(xYLayout1);

this.setSize(new Dimension(600, 500));

this.setTitle("超市管理系统");

this.addHierarchyBoundsListener(new Frame2_this_hierarchyBoundsAdapter(this));

jLabel1.setFont(new java.awt.Font("SansSerif", 0, 25));

jLabel1.setForeground(Color.red);

jLabel1.setText("超市管理系统");

contentPane.setForeground(Color.black);

jLabel2.setFont(new java.awt.Font("SansSerif", 0, 30));

jLabel2.setText("产品信息展示");

// statusBar.setFont(new java.awt.Font("SansSerif", 0, 20));

jLabel3.setFont(new java.awt.Font("SansSerif", 0, 20));

jLabel3.setText("产品名称");

jTextField1.setText("");

jLabel4.setEnabled(true);

jLabel4.setFont(new java.awt.Font("SansSerif", 0, 20));

jLabel4.setText("产品ID号");

jTextField2.setText("");

jTextField2.addActionListener(new Frame2_jTextField2_actionAdapter(this));

jPanel1.setLayout(xYLayout2);

jLabel5.setFont(new java.awt.Font("SansSerif", 0, 25));

jLabel5.setForeground(Color.red);

jLabel5.setText("该产品详细信息");

jTextField3.setText("");

contentPane.add(jLabel1, new XYConstraints(237, 0, 153, 40));

contentPane.add(jLabel2, new XYConstraints(200, 47, 231, 58));

contentPane.add(jLabel3, new XYConstraints(47, 102, 101, 42));

contentPane.add(jTextField1, new XYConstraints(128, 108, 112, 34));

contentPane.add(jTextField2, new XYConstraints(361, 107, 109, 36));

contentPane.add(jPanel1, new XYConstraints(75, 166, 453, 277));

jPanel1.add(jScrollPane1, new XYConstraints(14, 8, 433, 221));

jScrollPane1.getViewport().add(jTextField3, null);

jPanel1.add(jLabel5, new XYConstraints(112, 240, -1, -1));

contentPane.add(jLabel4, new XYConstraints(278, 111, -1, -1));

}

//Overridden so we can exit when window is closed

protected void processWindowEvent(WindowEvent e) {

super.processWindowEvent(e);

if (e.getID() == WindowEvent.WINDOW_CLOSING) {

System.exit(0);

}

void Select() {

try {

String str1, str2;

str1 = jTextField1.getText();

str2 = jTextField2.getText();

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java商户管理代码 java商城模板

用JAVA编程的通过SQL连接数据库的商品库存管理系统的源代码

用JAVA编写购物系统的代码是什么？（急）

java用户管理的代码中查询不了是哪出问题了

亲有java语言写的超市管理系统课程设计和源代码吗，能给我吗

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