JavaWeb实战：报价计算系统（layui+tomcat+cookie实现）
JavaWeb实战：报价计算系统（layui+tomcat+cookie实现）
系统概述：
该系统是文物物流公司的一个小功能模块，用于帮助用户计算运费。点击查看实际效果
系统文档：
添加展品：
在表单内添加展品信息，完毕后点击添加展品，即可在展品列表中显示相应的展品信息，也可以对已经添加的展品进行删除，完成之后点击下一步。
添加行程：
使用方法与添加行程类似，添加完毕之后点击先一步。
生成报价：
在下拉选项栏中选择服务公司，选择完毕点击立即查询即可生成报价。
开发中使用的技术：
layui
tomcat
json
cookie
实现思路：
我个人的想法是，先这个把这个系统划分生两大部分：第一部分：展品、行程列表的管理，第二部分：报价计算。
第一部分、展品、行程列表的管理：
展品和行程可以看作是两个类，那么展品和行程列表就可以看成是两个ArrayList，展品和行程列表的管理就可以看作是Array List的增加、删除和查询整个链表。
明白这个道理后，就是具体的操作实现了。所以我宏观的思路是前端进行信息的提交，后端进行详细的信息操作。
添加：前端发送添加展品/行程的信息，后端得到表单数据，生成cookie；
删除：前端发送删除展品的信息，后端接受信息并读取cookie生成链表删除删除相应对象，更新cookie。
显示列表：后端读取cookie，将cookie转换为json发送至客户端，前端根据后端json生成列表。
第二部分、报价计算：
该部分比较简单，得到展品和行程的ArrayList根据相应公式计算的到总价。
代码实现：
servlet类（实现行程和展品信息的处理和给前端发送数据）
package com.bdzp.servlet;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.bdzp.Utils.GetWord;
import com.bdzp.daomain.modelContractParams;
import com.bdzp.daomain.modelTrip;
import com.bdzp.daomain.modelVolume;
import com.bdzp.service.PriceService;
import com.bdzp.service.imp.PriceServiceTestImpI;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.net.http.HttpResponse;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
@WebServlet(name = "ServletPriceTest")
public class ServletPriceTest extends HttpServlet {
private static final long serialVersionUID=1L;
private PriceService ps=new PriceServiceTestImpI();
modelContractParams params=new modelContractParams();
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");//解决乱码
response.setContentType("text/html;charset=UTF-8");
String type =request.getParameter("command");
if ("addDisplay".equals(type))
{
addDisplay(request,response);
}else if("delDisplay".equals(type)){
delDisplay(request,response);
}else if("getDisplayList".equals(type)){
getDisplayList(request,response);
}else if("addTrip".equals(type)){
addTrip(request,response);
}else if("delTrip".equals(type)){
delTrip(request,response);
}else if("getTripList".equals(type)) {
getTripList(request, response);
} else if("getPrice".equals(type)){
getPrice(request,response);
}else if ("submitParams".equals(type)){
try {
params=submitParams(request, response);
} catch (ParseException e) {
e.printStackTrace();
}
}else if ("madeContract".equals(type)){
downloadFileTest(request, response,params);
}
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
public void addDisplay(HttpServletRequest request,HttpServletResponse response){
String name=request.getParameter("displayName");
int amount=Integer.parseInt(request.getParameter("amount"));
int height=Integer.parseInt(request.getParameter("height"));
int width=Integer.parseInt(request.getParameter("width"));
int length=Integer.parseInt(request.getParameter("length"));
modelVolume volume=new modelVolume();
volume.setName(name);
volume.setAmount(amount);
volume.setLength(length);
volume.setWidth(width);
volume.setHeight(height);
if (addDisplay(volume,response,request)){
System.out.println("添加展品成功");
PrintWriter out= null;
try {
out = response.getWriter();
out.print("Y");
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void delDisplay(HttpServletRequest request,HttpServletResponse response){
String name=request.getParameter("displayName");
if (delDisplay(name,response,request)){
System.out.println("删除展品成功");
PrintWriter out=null;
try {
out=response.getWriter();
out.print("Y");
out.flush();
out.close();
}catch (IOException e ){
e.printStackTrace();
}
}
}
public void getDisplayList(HttpServletRequest request,HttpServletResponse response){
String json = null;
try {
json = "{\"code\":0,\"msg\":\"\",\"count\":0,\"data\":" + JSON.toJSONString(getDisplayArrayList(request, response)) + "}";
System.out.println(json);
PrintWriter out=null;
out = response.getWriter();
out.print(json);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public void addTrip(HttpServletRequest request,HttpServletResponse response){
String name=request.getParameter("tripName");
String start=request.getParameter("start");
String end=request.getParameter("goal");
int bigCarAmount=Integer.parseInt(request.getParameter("bigCarAmount"));
int smallCarAmount=Integer.parseInt(request.getParameter("smallCarAmount"));
int bigCarDistance=Integer.parseInt(request.getParameter("bigCarDistance"));
int smallCarDistance=Integer.parseInt(request.getParameter("smallCarDistance"));
int workerAmount=Integer.parseInt(request.getParameter("workerAmount"));
int workerDays=Integer.parseInt(request.getParameter("workerDays"));
modelTrip trip=new modelTrip();
trip.setName(name);
trip.setStart(start);
trip.setEnd(end);
trip.setBigCarAmount(bigCarAmount);
trip.setBigCarDistance(bigCarDistance);
trip.setSmallCarAmount(smallCarAmount);
trip.setSmallCarDistance(smallCarDistance);
trip.setWorkerAmount(workerAmount);
trip.setWorkerDays(workerDays);
if (addTrip(trip,response,request)){
System.out.println("添加行程成功");
PrintWriter out= null;
try {
out = response.getWriter();
out.print("Y");
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void delTrip(HttpServletRequest request,HttpServletResponse response){
String name=request.getParameter("tripName");
if (delTrip(name,response,request)){
System.out.println("删除行程成功");
PrintWriter out=null;
try {
out=response.getWriter();
out.print("Y");
out.flush();
out.close();
}catch (IOException e ){
e.printStackTrace();
}
}
}
public void getTripList(HttpServletRequest request,HttpServletResponse response){
try {
String json = "{\"code\":0,\"msg\":\"\",\"count\":0,\"data\":" + JSON.toJSONString(getTripArrayList(request, response)) + "}";
System.out.println(json);
PrintWriter out=null;
out = response.getWriter();
out.print(json);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public boolean addDisplay(modelVolume model,HttpServletResponse response,HttpServletRequest request) {
boolean flag=false;
try {
//value中储存的使json字符转，将json字符串转换为对象数组
Cookie cookie=getCookie("displayList",response, request);
//将json字符串转换为对象数组
ArrayList displayList=new ArrayList();
String cookieValue=URLDecoder.decode(cookie.getValue(), "utf-8");
displayList= (ArrayList) JSON.parseArray(cookieValue,modelVolume.class);
displayList.add(model);
JSONArray array=JSONArray.parseArray(JSON.toJSONString(displayList));
System.out.println(array);
String encodeCookie = null;
encodeCookie = URLEncoder.encode(array.toJSONString(),"utf-8");
response.addCookie(new Cookie("displayList",encodeCookie));
flag=true;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return flag;
}
public boolean delDisplay(String name,HttpServletResponse response,HttpServletRequest request){
Cookie cookie=getCookie("displayList",response, request);
try {
String cookieValue=URLDecoder.decode(cookie.getValue(), "utf-8");
ArrayList displayList= (ArrayList) JSON.parseArray(cookieValue,modelVolume.class);
for (modelVolume display:displayList){
if (display.getName().equals(name)){
displayList.remove(display);
JSONArray array=JSONArray.parseArray(JSON.toJSONString(displayList));
try {
String encodeCookie = URLEncoder.encode(array.toJSONString(),"utf-8");
response.addCookie(new Cookie("displayList",encodeCookie));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return true;
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return false;
}
public ArrayListgetDisplayArrayList(HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException {
Cookie cookie=getCookie("displayList",response, request);
String cookieValue=URLDecoder.decode(cookie.getValue(), "utf-8");
ArrayList displayList= (ArrayList) JSON.parseArray(cookieValue,modelVolume.class);
return displayList;
}
public boolean addTrip(modelTrip model,HttpServletResponse response,HttpServletRequest request){
boolean flag=false;
//value中储存的使json字符转，将json字符串转换为对象数组
try {
Cookie cookie=getCookie("tripList",response, request);
//将json字符串转换为对象数组
ArrayList tripList=new ArrayList();
String cookieValue=URLDecoder.decode(cookie.getValue(), "utf-8");
tripList= (ArrayList) JSON.parseArray(cookieValue,modelTrip.class);
tripList.add(model);
JSONArray array=JSONArray.parseArray(JSON.toJSONString(tripList));
System.out.println(array);
String encodeCookie = null;
encodeCookie = URLEncoder.encode(array.toJSONString(),"utf-8");
response.addCookie(new Cookie("tripList",encodeCookie));
flag=true;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return flag;
}
public boolean delTrip(String name,HttpServletResponse response,HttpServletRequest request){
Cookie cookie=getCookie("tripList",response, request);
try {
String cookieValue=URLDecoder.decode(cookie.getValue(), "utf-8");
ArrayList tripList= (ArrayList) JSON.parseArray(cookieValue,modelTrip.class);
for (modelTrip trip:tripList){
if (trip.getName().equals(name)){
tripList.remove(trip);
JSONArray array=JSONArray.parseArray(JSON.toJSONString(tripList));
try {
String encodeCookie = URLEncoder.encode(array.toJSONString(),"utf-8");
response.addCookie(new Cookie("tripList",encodeCookie));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return true;
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return false;
}
public ArrayListgetTripArrayList(HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException {
Cookie cookie=getCookie("tripList",response, request);
String cookieValue=URLDecoder.decode(cookie.getValue(), "utf-8");
ArrayList tripList= (ArrayList) JSON.parseArray(cookieValue,modelTrip.class);
return tripList;
}
public Cookie getCookie(String name,HttpServletResponse response,HttpServletRequest request){
Cookie result=null;
boolean flag=false;
if (request.getCookies()!=null){
for (Cookie cookie:request.getCookies()){
if (cookie.getName().equals(name)){
result=cookie;
flag=true;
}
}
}
if (!flag){
try {
String encodeCookie = URLEncoder.encode("[]","utf-8");
Cookie cookie=new Cookie(name,encodeCookie);
cookie.setMaxAge(1);
response.addCookie(cookie);
result=cookie;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
return result;
}
public void getPrice(HttpServletRequest request,HttpServletResponse response){
try {
String company=request.getParameter("company");
int price =ps.getPrice(company,getDisplayArrayList(request, response),getTripArrayList(request, response)).get(7);
PrintWriter out = null;
out = response.getWriter();
out.print(price);
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public modelContractParams submitParams(HttpServletRequest request,HttpServletResponse response) throws ParseException {
String company =request.getParameter("company");
String activity=request.getParameter("activity");
String partyA=request.getParameter("partyA");
String address=request.getParameter("address");
String name=request.getParameter("name");
String phone=request.getParameter("phone");
String startString=request.getParameter("startDate");
String endString=request.getParameter("end");
String start= new String(new SimpleDateFormat("yyyy年MM月dd日").format(new SimpleDateFormat("yyyy-MM-dd").parse(startString)));
String end= new String(new SimpleDateFormat("yyyy年MM月dd日").format(new SimpleDateFormat("yyyy-MM-dd").parse(endString)));
modelContractParams params=new modelContractParams();
params.setCompany(company);
params.setActivity(activity);
params.setAddress(address);
params.setName(name);
params.setPartyA(partyA);
params.setPhone(phone);
params.setStart(start);
params.setEnd(end);
try {
PrintWriter out=null;
out=response.getWriter();
out.print("Y");
out.flush();
out.close();
}catch (IOException e ){
e.printStackTrace();
}
return params;
}
public void downloadFileTest(HttpServletRequest request,HttpServletResponse response,modelContractParams params){
try {
// 处理中文文件名下载乱码
request.setCharacterEncoding("UTF-8");
String path = "";
String fileName = "";
String activity=params.getActivity();
String name ="“"+ activity+"”展品包装运输服务协议书.doc";
// 投保书
fileName = new String(name.getBytes("UTF-8"), "iso-8859-1");
GetWord gw = new GetWord();
//价格明细表格
List> priceTableList=new ArrayList>();
Map tempValue=new HashMap<>();
List priceList=ps.getPrice(request.getParameter("company"),getDisplayArrayList(request, response),getTripArrayList(request, response));
tempValue.put("inProductionCost",String.valueOf(priceList.get(0)));
tempValue.put("packingMaterialCost",String.valueOf(priceList.get(1)));
tempValue.put("outProductionCost",String.valueOf(priceList.get(2)));
tempValue.put("bigCarCost",String.valueOf(priceList.get(3)));
tempValue.put("smallCarCost",String.valueOf(priceList.get(4)));
tempValue.put("workerCost",String.valueOf(priceList.get(5)));
tempValue.put("taxes",String.valueOf(priceList.get(6)));
tempValue.put("sumCost",String.valueOf(priceList.get(7)));
priceTableList.add(tempValue);
path = gw.getWordTest(request, response,
priceTableList,
ps.getParams(params,getDisplayArrayList(request, response),getTripArrayList(request, response),priceList));
response.setCharacterEncoding("utf-8");
response.setContentType("application/msword"); // word格式
response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
File file = new File(path);
InputStream inputStream = new FileInputStream(file);
OutputStream os = response.getOutputStream();
byte[] b = new byte[10240];
int length;
while ((length = inputStream.read(b)) > 0) {
os.write(b, 0, length);
}
inputStream.close();
os.flush();
os.close();
file.delete();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
PriceServicempl类，用于价格计算
public List getPrice(String company, ArrayList displayList, ArrayList tripList) {
int price=0;
//得到总体积 保留三位小数
double sumVolume=0; //总体积
int sumDisplayAmount=0;//得到展品总量
for (modelVolume volume:displayList){
sumVolume+=volume.getVolume();
sumDisplayAmount+=volume.getAmount();
}
sumVolume=Math.ceil(sumVolume*0.001)*0.001;
/*报价计算*/
//包装费用
int inProductionCost=(int)Math.ceil(sumVolume*2800*0.1)*10; //inProductionCost 内箱制作费
int packingMaterialCost=0; //PackingMaterialCost 包装材料费
if (sumDisplayAmount<=70){
packingMaterialCost=3000;
}else {
packingMaterialCost=5000;
}
//((int)(sumVolume/0.5)==sumVolume/0.5?sumVolume/0.5*1800:(sumVolume/0.5+1)*1800);
int outProductionCost=(int)Math.ceil(sumVolume/0.5)*1800; //outProductionCost 外箱制作费
int finallyPackingCost=inProductionCost+outProductionCost+packingMaterialCost;//finallyPackingCost 总包装费
int bigCarCost=0;//大车总费用
int smallCarCost=0;//小车总费用
int workerCost=0;//总人工费
for (modelTrip trip:tripList){
bigCarCost+=trip.getBigCarAmount()*trip.getBigCarDistance()*18;
smallCarCost+=trip.getSmallCarAmount()*trip.getSmallCarDistance()*10;
workerCost+=trip.getWorkerAmount()*trip.getWorkerDays()*800;
}
double x=Math.ceil((finallyPackingCost+bigCarCost+smallCarCost+workerCost)*0.1)*10;
price=(int)x;
int taxation=0;//税费
if (price==3000) {
price=0;
} else if ("BeiJing".equals(company)) {
taxation=(int)Math.ceil(price * 0.06 / 10) * 10;
price=taxation + price;
} else if ("HeNan".equals(company)) {
taxation=(int)Math.ceil(price * 0.03 / 10) * 10;
price=taxation + price;
}
List priceList=new ArrayList();
priceList.add(inProductionCost);
priceList.add(packingMaterialCost);
priceList.add(outProductionCost);
priceList.add(bigCarCost);
priceList.add(smallCarCost);
priceList.add(workerCost);
priceList.add(taxation);
priceList.add(price);
return priceList;
}
前端代码：
``
价格计算
- 添加展品
- 添加行程
- 生成报价
- 生成合同
合计费用