Java模拟公司置办货物系统（一）

采用MVC风格，将数据写入文件，模拟公司置办货物系统。

A类表示普通员工，B类表示部门精力，C类表示采购部，D类表示资源管理部。
订单状态 1.表示申请状态 2.表示通过审批 3.表示未通过审批 4.表示订单完成，购物完成
第一步：首先创建Employeer类，代表员工类.

package com.jereh14;

public class Employeer implements java.io.Serializable{

    private String name;
    private int empNo;
    private String pwd;
    private String lev;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getEmpNo() {
        return empNo;
    }
    public void setEmpNo(int empNo) {
        this.empNo = empNo;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public String getLev() {
        return lev;
    }
    public void setLev(String lev) {
        this.lev = lev;
    }
}

定义EmployeerBiz类，实现员工增删改查功能.

package com.jereh14;

import java.io.*;
import java.util.*;

public class EmployeerBiz {

    private List<Employeer> list = new ArrayList<Employeer>();

    public void addEmp(Employeer emp){

        readDb();
        list.add(emp);
        writeDb();
    }

    public void updateEmp(Employeer emp){

        readDb();
        Iterator<Employeer> i = list.iterator();
        while(i.hasNext()){
            Employeer e = i.next();
            if(e.getEmpNo()==emp.getEmpNo()){
                list.remove(e);
                list.add(emp);
            }
        }
        writeDb();
    }

    public void deleteEmp(int empNo){

        readDb();
        Iterator<Employeer> i = list.iterator();
        while(i.hasNext()){
            Employeer e = i.next();
            if(e.getEmpNo() == empNo){
                list.remove(e);
                break;
            }
        }
        writeDb();
    }

    public String searchPor(int userId,String pwd){
        readDb();
        String type = "";
        Iterator<Employeer> i = list.iterator();
        while(i.hasNext()){
            Employeer e = i.next();
            if(e.getEmpNo()==userId&&e.getPwd().equals(pwd)){
                type = e.getLev();
                break;
            }else{
                type = null;
            }
        }
        writeDb();
        return type;
    }

    public void showEmp(){

        readDb();
        Iterator<Employeer> i = list.iterator();
        while(i.hasNext()){
            Employeer e = i.next();
            System.out.println("\t"+e.getEmpNo()+"\t"+e.getName()+"\t"+e.getPwd()+"\t"+e.getLev());
        }
        writeDb();
    }

    public boolean check(int upEmpNo){

        Iterator<Employeer> i = list.iterator();
        boolean bool = false;
        while(i.hasNext()){
            Employeer e = i.next();
            if(e.getEmpNo() == upEmpNo){
                bool = true;
                break;
            }else{
                bool = false;
            }
        }
        return bool;
    }

    public void readDb(){

        FileInputStream fis  = null;
        ObjectInputStream is = null;
        InputStreamReader isr = null;
        BufferedReader bis = null;
        try {
            fis = new FileInputStream("F:\\test\\Employeer.txt");
            is = new ObjectInputStream(fis);
            list = (List<Employeer>) is.readObject();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    public void writeDb(){
        FileOutputStream fos  = null;
        ObjectOutputStream os = null;
        try {
            fos = new FileOutputStream("F:\\test\\Employeer.txt");
            os  = new ObjectOutputStream(fos);
            os.writeObject(list);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                os.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}

定义EmployeerView，用于与用户交互。

package com.jereh14;

import java.util.*;

public class EmployeerView {

    public void empView(){

        Scanner scn      = new Scanner(System.in);
        Employeer emp    = null;
        EmployeerBiz elb = new EmployeerBiz();

        System.out.println("===============欢迎来到雇员管理===============");

        while(true){
            System.out.println("\t\t1、添加雇员\n\t\t2、修改雇员\n\t\t3、删除雇员\n\t\t4、查看雇员\n\t\t5、退出系统");
            System.out.println("********************************************");
            System.out.print("请选择您的操作：");

            int chooseNum = scn.nextInt();
            switch(chooseNum){
            case 1:
                System.out.println("===================添加雇员==================");
                System.out.print("请输入雇员编号：");
                int empNo = scn.nextInt();
                System.out.print("请输入雇员姓名：");
                String name = scn.next();
                System.out.print("请输入登录密码：");
                String pwd = scn.next();
                System.out.print("请输入雇员类型：");
                String lev = scn.next();

                emp = new Employeer();
                emp.setEmpNo(empNo);
                emp.setName(name);
                emp.setPwd(pwd);
                emp.setLev(lev);

                elb.addEmp(emp);

                if(elb.check(empNo)){
                    System.out.println("--添加成功！--");
                }else{
                    System.out.println("--添加失败！--");
                }
                System.out.println("********************************************");
                break;
            case 2:
                System.out.println("===================修改雇员==================");
                System.out.print("请输入雇员编号：");
                int upEmpNo = scn.nextInt();
                if(elb.check(upEmpNo)){
                    System.out.print("请输入要修改的姓名：");
                    String upName = scn.next();
                    System.out.print("请输入要修改的密码：");
                    String upPwd = scn.next();
                    System.out.print("请输入要修改的类型：");
                    String upLev = scn.next();

                    emp = new Employeer();
                    emp.setEmpNo(upEmpNo);
                    emp.setName(upName);
                    emp.setPwd(upPwd);
                    emp.setLev(upLev);

                    elb.updateEmp(emp);

                    System.out.println("--修改成功！--");

                }else{
                    System.out.println("没有该雇员！");
                }
                System.out.println("********************************************");
                break;
            case 3:
                System.out.println("===================删除雇员==================");
                System.out.print("请输入雇员编号：");
                int delEmpNo = scn.nextInt();
                if(elb.check(delEmpNo)){
                    elb.deleteEmp(delEmpNo);
                    System.out.println("--删除成功！--");
                }else{
                    System.out.println("没有该雇员！");
                }
                System.out.println("********************************************");
                break;
            case 4:
                System.out.println("===================查看雇员==================");
                System.out.println("\t编号\t姓名\t密码\t类型");
                elb.showEmp();
                System.out.println("********************************************");
                break;
            case 5:
                System.out.println("谢谢您的使用！");
                System.exit(0);
                break;
            }
        }
    }
}

运行效果图：




第二步：创建Por类代表订单类。

package com.jereh14;

public class Por implements java.io.Serializable{

    public int getPor_no() {
        return por_no;
    }
    public void setPor_no(int por_no) {
        this.por_no = por_no;
    }
    public String getPart_desc() {
        return part_desc;
    }
    public void setPart_desc(String part_desc) {
        this.part_desc = part_desc;
    }
    public String getPart_type() {
        return part_type;
    }
    public void setPart_type(String part_type) {
        this.part_type = part_type;
    }
    public int getCount() {
        return count;
    }
    public void setCount(int count) {
        this.count = count;
    }
    public String getPart_use() {
        return part_use;
    }
    public void setPart_use(String part_use) {
        this.part_use = part_use;
    }
    public String getPnd() {
        return pnd;
    }
    public void setPnd(String pnd) {
        this.pnd = pnd;
    }
    public String getRgdt() {
        return rgdt;
    }
    public void setRgdt(String rgdt) {
        this.rgdt = rgdt;
    }
    public int getStus() {
        return stus;
    }
    public void setStus(int stus) {
        this.stus = stus;
    }
    public String getRgdt_emp() {
        return rgdt_emp;
    }
    public void setRgdt_emp(String rgdt_emp) {
        this.rgdt_emp = rgdt_emp;
    }
    public String getCf_date() {
        return cf_date;
    }
    public void setCf_date(String cf_date) {
        this.cf_date = cf_date;
    }
    public String getCf_emp() {
        return cf_emp;
    }
    public void setCf_emp(String cf_emp) {
        this.cf_emp = cf_emp;
    }
    private int por_no;
    private String part_desc;
    private String part_type;
    private int count;
    private String part_use;
    private String pnd;
    private String rgdt;
    private int stus;
    private String rgdt_emp;
    private String cf_date;
    private String cf_emp;
}

定义PorBiz类，实现订单的增删改查。

package com.jereh14;

import java.io.*;
import java.util.*;

public class PorBiz {

    private List<Por> list = new ArrayList<Por>();

    public void addPor(Por por){

        readDb();
        list.add(por);
        writeDb();
    }

    public void updatePor(Por por){

        readDb();
        Iterator<Por> i = list.iterator();
        while(i.hasNext()){
            Por p = i.next();
            if(p.getPor_no()==por.getPor_no()){
                list.remove(p);
                list.add(por);
            }
        }
        writeDb();
    }

    public boolean changeStuts(int porId,int chooseNum){
        readDb();
        boolean bool = false;
        Iterator<Por> i = list.iterator();
        while(i.hasNext()){
            Por p = i.next();
            if(p.getPor_no() == porId){
                if(chooseNum == 1){
                    p.setStus(2);
                }else if(chooseNum == 2){
                    p.setStus(3);
                }else {
                    p.setStus(4);
                }
                bool = true;
                break;
            }else{
                bool = false;
            }
        }
        writeDb();
        return bool;
    }

    public void deletePor(int del_por_no){
        readDb();
        Iterator<Por> i = list.iterator();
        while(i.hasNext()){
            Por p = i.next();
            if(p.getPor_no() == del_por_no){
                list.remove(p);
                break;
            }
        }
        writeDb();
    }

    //传入type,决定输入的订单类型,1表示全部输出,2表示只输出状态为1的订单.
    public void showPor(int type){

        readDb();
        Iterator<Por> i = list.iterator();
        if(type == 1){
            while(i.hasNext()){
                Por p = i.next();
                System.out.println(p.getPor_no()+"\t"+p.getPart_desc()+"\t"+p.getPart_type()+"\t"+p.getCount()+"\t"+
                        p.getPart_use()+"\t"+p.getPnd()+"\t"+p.getRgdt()+"\t"+p.getStus()+"\t"+p.getRgdt_emp()+"\t"+
                        p.getCf_date()+"\t"+p.getCf_emp());
            }
        }else if(type == 2){
            while(i.hasNext()){
                Por p = i.next();
                if(p.getStus()==1){
                System.out.println(p.getPor_no()+"\t"+p.getPart_desc()+"\t"+p.getPart_type()+"\t"+p.getCount()+"\t"+
                        p.getPart_use()+"\t"+p.getPnd()+"\t"+p.getRgdt()+"\t"+p.getStus()+"\t"+p.getRgdt_emp()+"\t"+
                        p.getCf_date()+"\t"+p.getCf_emp());
                }
            }
        }else{
            while(i.hasNext()){
                Por p = i.next();
                if(p.getStus()==2){
                System.out.println(p.getPor_no()+"\t"+p.getPart_desc()+"\t"+p.getPart_type()+"\t"+p.getCount()+"\t"+
                        p.getPart_use()+"\t"+p.getPnd()+"\t"+p.getRgdt()+"\t"+p.getStus()+"\t"+p.getRgdt_emp()+"\t"+
                        p.getCf_date()+"\t"+p.getCf_emp());
                }
            }
        }
        writeDb();
    }

    public boolean check(int por_no){
        Iterator<Por> i = list.iterator();
        boolean bool = false;
        while(i.hasNext()){
            Por p = i.next();
            if(p.getPor_no() == por_no){
                bool = true;
                break;
            }else{
                bool = false;
            }
        }
        return bool;
    }

    public Por getPor(int porId){

        Iterator<Por> i = list.iterator();
        while(i.hasNext()){
            Por p = i.next();
            if(p.getPor_no() == porId){
                return p;
            }else{
                p = null;
            }
        }
        return null;
    }

    public void readDb(){

        FileInputStream fis  = null;
        ObjectInputStream is = null;
        try {
            fis = new FileInputStream("F:\\test\\Por.txt");
            is = new ObjectInputStream(fis);
            list = (List<Por>) is.readObject();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    }

    public void writeDb(){

        FileOutputStream fos  = null;
        ObjectOutputStream os = null;
        try {
            fos = new FileOutputStream("F:\\test\\Por.txt");
            os  = new ObjectOutputStream(fos);
            os.writeObject(list);
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                os.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}

定义PorView类，用于与用户交互。

package com.jereh14;

import java.util.Scanner;

public class PorView {

    public void porView(){

        Scanner scn = new Scanner(System.in);
        Por por     = null;
        PorBiz pb   = new PorBiz();

        System.out.println("===============欢迎来到采购申请===============");

        while(true){
            System.out.println("\t\t1、添加申请\n\t\t2、修改申请\n\t\t3、删除申请\n\t\t4、查看申请\n\t\t5、退出系统");
            System.out.println("********************************************");
            System.out.print("请选择您的操作：");

            int chooseNum = scn.nextInt();
            switch(chooseNum){
            case 1:
                System.out.println("===================添加申请==================");
                System.out.print("请输入订单编号：");
                int por_no = scn.nextInt();
                System.out.print("请输入订单物品：");
                String part_desc = scn.next();
                System.out.print("请输入物品型号：");
                String part_type = scn.next();
                System.out.print("请输入物品数量：");
                int count = scn.nextInt();
                System.out.print("请输入物品用途：");
                String part_use = scn.next();
                System.out.print("请输入需要日期：");
                String pnd = scn.next();
                System.out.print("请输入申请日期：");
                String rgdt = scn.next();
                System.out.print("请输入订单状态：");
                int stus = scn.nextInt();
                System.out.print("请输入申请者：");
                String rgdt_emp = scn.next();
                System.out.print("请输入批准日期：");
                String cf_date = scn.next();
                System.out.print("请输入审核者：");
                String cf_emp = scn.next();

                por = new Por();
                por.setPor_no(por_no);
                por.setPart_desc(part_desc);
                por.setPart_type(part_type);
                por.setCount(count);
                por.setPart_use(part_use);
                por.setPnd(pnd);
                por.setRgdt(rgdt);
                por.setStus(stus);
                por.setRgdt_emp(rgdt_emp);
                por.setCf_date(cf_date);
                por.setCf_emp(cf_emp);

                pb.addPor(por);

                if(pb.check(por_no)){
                    System.out.println("--添加成功！--");
                }else{
                    System.out.println("--添加失败！--");
                }
                System.out.println("********************************************");
                break;
            case 2:
                System.out.println("===================修改申请==================");
                System.out.print("请输入申请编号：");
                int up_por_no = scn.nextInt();
                if(pb.check(up_por_no)){
                    System.out.print("请输入订单物品：");
                    String up_part_desc = scn.next();
                    System.out.print("请输入物品型号：");
                    String up_part_type = scn.next();
                    System.out.print("请输入物品数量：");
                    int up_count = scn.nextInt();
                    System.out.print("请输入物品用途：");
                    String up_part_use = scn.next();
                    System.out.print("请输入需要日期：");
                    String up_pnd = scn.next();
                    System.out.print("请输入申请日期：");
                    String up_rgdt = scn.next();
                    System.out.print("请输入订单状态：");
                    int up_stus = scn.nextInt();
                    System.out.print("请输入申请者：");
                    String up_rgdt_emp = scn.next();
                    System.out.print("请输入批准日期：");
                    String up_cf_date = scn.next();
                    System.out.print("请输入审核者：");
                    String up_cf_emp = scn.next();

                    por = new Por();
                    por.setPor_no(up_por_no);
                    por.setPart_desc(up_part_desc);
                    por.setPart_type(up_part_type);
                    por.setCount(up_count);
                    por.setPart_use(up_part_use);
                    por.setPnd(up_pnd);
                    por.setRgdt(up_rgdt_emp);
                    por.setStus(up_stus);
                    por.setRgdt_emp(up_rgdt_emp);
                    por.setCf_date(up_cf_date);
                    por.setCf_emp(up_cf_emp);

                    pb.updatePor(por);

                    System.out.println("--修改成功！--");

                }else{
                    System.out.println("--没有该申请！--");
                }
                System.out.println("********************************************");
                break;
            case 3:
                System.out.println("===================删除申请==================");
                System.out.print("请输入申请编号：");
                int del_por_no = scn.nextInt();
                if(pb.check(del_por_no)){
                    pb.deletePor(del_por_no);
                    System.out.println("--删除成功！--");
                }else{
                    System.out.println("--没有该申请！--");
                }
                System.out.println("********************************************");
                break;
            case 4:
                System.out.println("===================查看申请==========================================================\n");
                System.out.println("编号\t名称\t型号\t数量\t用途\t需要日期\t申请日期\t状态\t申请者\t批准日期\t审核者\n");
                pb.showPor(1);
                System.out.println("\n************************************************************************************");
                break;
            case 5:
                System.out.println("谢谢您的使用！");
                System.exit(0);
                break;
                default:
                    System.out.println("--输入有误！--");
                    break;
            }
        }
    }
}

运行效果图：



定义PorCfView类，用于审批订单。

package com.jereh14;

import java.util.Scanner;

public class PorCfView {

    public void showInfoView(){

        Scanner scn = new Scanner(System.in);
        PorBiz pb   = new PorBiz();

        while(true){
            System.out.println("=======================================订单审批=======================================\n");
            System.out.println("编号\t名称\t型号\t数量\t用途\t需要日期\t申请日期\t状态\t申请者\t批准日期\t审核者\n");
            pb.showPor(2);
            System.out.println("\n******************************1、批准\t2、驳回\t3、退出*******************************");
            System.out.print("请选择您的操作：");
            int chooseNum = scn.nextInt();
            int porId = -1;
            switch(chooseNum){
            case 1:
                System.out.print("请输入您要操作的单号：");
                porId = scn.nextInt();
                if(pb.changeStuts(porId,1)){
                    System.out.println("--订单审批完成！--\n");
                }else{
                    System.out.println("--该订单不存在！--\n");
                }
                break;
            case 2:
                System.out.print("请输入您要操作的单号：");
                porId = scn.nextInt();
                if(pb.changeStuts(porId,2)){
                    System.out.println("--该订单被拒绝！--\n");
                }else{
                    System.out.println("--该订单不存在！--\n");
                }
                break;
            case 3:
                System.out.println("谢谢您的使用！");
                System.exit(0);
                break;
                default:
                    System.out.println("--输入有误！--");
                    break;
            }
        }
    }
}

运行效果图：



下篇继续。