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系统开发/src/com/company/Main.java

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+package com.company;
+
+
+import static java.lang.System.exit;
+
+public class Main {
+
+    public static void main(String[] args) {
+	// write your code here
+        SqLite mysql=new SqLite();
+        mysql.create();
+        Start s=new Start();
+        s.start();
+
+    }
+
+}

系统开发/src/com/company/SqLite.java

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+package com.company;
+import java.sql.*;
+
+
+public class SqLite {
+
+    public void create(){
+        Connection c = null;
+        Statement stmt = null;
+        try {
+            Class.forName("org.sqlite.JDBC");
+            c = DriverManager.getConnection("jdbc:sqlite:test.db");
+         //   System.out.println("Opened database successfully");
+            stmt = c.createStatement();
+         //  String sql9 = "DROP TABLE IF EXISTS USER";
+         //  stmt.executeUpdate(sql9);
+            String sql = "CREATE TABLE  IF NOT EXISTS USER " +
+                    "(ID    TEXT  PRIMARY KEY  NOT NULL," +
+                    " NAME  TEXT       NOT NULL," +
+                    " PASSWORD   TEXT    NOT NULL," +
+                    " TYPE     INT      NOT NULL," +
+                    " LEVEL    INT      NOT NULL," +
+                    " RETIME    TEXT    NOT NULL," +
+                    " MONEY     INT     NOT NULL," +
+                    " PHONE     TEXT     NOT NULL," +
+                    " MAILBOX   TEXT     NOT NULL)";
+            stmt.executeUpdate(sql);
+
+
+          //  String sql99 = "DROP TABLE IF EXISTS COMMODITY";
+           // stmt.executeUpdate(sql99);
+
+            String sql1 = "CREATE TABLE  IF NOT EXISTS COMMODITY " +
+                    "(ID TEXT PRIMARY KEY  NOT NULL," +
+                    "PRODUCT TEXT   NOT NULL," +
+                    "FACTORY  TEXT  NOT NULL," +
+                    "DATE   TEXT  NOT NULL," +
+                    "TYPE  TEXT  NOT NULL," +
+                    "INPRICE INT NOT NULL," +
+                    "OUTPRICE   INT  NOT NULL," +
+                    "NUMS   INT   NOT NULL)";
+
+            stmt.executeUpdate(sql1);
+
+
+
+            String sql2 = "CREATE TABLE  IF NOT EXISTS SHOPCART " +
+                    "(USERNAME TEXT    NOT NULL," +
+                    " PRODUCT  TEXT    NOT NULL," +
+                    " PRICE    INT     NOT NULL," +
+                    " AMOUNT   INT     NOT NULL)";
+
+            stmt.executeUpdate(sql2);
+
+
+            String sql3 = "CREATE TABLE  IF NOT EXISTS HISTORY " +
+                    "(USERNAME TEXT    NOT NULL," +
+                    " PRODUCT TEXT   NOT NULL," +
+                    " AMOUNT    INT     NOT NULL," +
+                    " TOTALPRICE   INT  NOT NULL," +
+                    " TIME    TEXT     NOT NULL)";
+
+            stmt.executeUpdate(sql3);
+
+         //   String sql9 = "DELETE FROM SHOPCART";
+          //  stmt.executeUpdate(sql9);
+          //  String deleteQuery10 = "DELETE FROM HISTORY";
+          //  stmt.executeUpdate(deleteQuery10);
+            stmt.close();
+            c.close();
+        } catch ( Exception e ) {
+            System.err.println( e.getClass().getName() + ": " + e.getMessage() );
+            System.exit(0);
+        }
+      //  System.out.println("Table created successfully");
+    }
+
+
+
+
+
+
+
+
+}
+
+
+

系统开发/src/com/company/Start.java

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+package com.company;
+
+import java.util.InputMismatchException;
+import java.util.Scanner;
+
+import static java.lang.System.exit;
+
+public class Start {
+
+    public void start(){
+
+        Scanner input = new Scanner(System.in);
+
+        User user=new User();
+        Administrator administrator=new Administrator();
+
+        boolean mis = true;
+
+
+        while (mis) {
+            try {
+                System.out.println("***************START***************");
+                System.out.print("请选择身份————1.管理员 2.用户  (按‘0’退出系统)>");
+                int choose = input.nextInt();
+
+                if (choose == 1) {
+                    administrator.administratorLogin();
+                    mis = false;
+                } else if (choose == 2) {
+                    user.userLogin();
+                    mis = false;
+                } else if (choose == 0) {
+                    System.exit(1);
+                } else {
+                    System.out.println("输入有误，请重新输入");
+                }
+            } catch (InputMismatchException e) {
+                System.out.println("输入有误，请重新输入");
+                input.nextLine(); // 清空输入缓冲区
+            }
+        }
+
+
+    }
+
+
+
+}