SSH Online Mall Project 30 project summary (with source download address) __ssh

0. Written in front

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The project has been basically completed, plus this summary, and the project related to the blog also wrote 30, add up, the process of writing a blog is a process of curing thought, useful to themselves, but also to help others. Incidentally, in the process of learning will certainly encounter a lot of anomalies appear, we have to do is to locate this anomaly, the general exception will be followed by one or more caused by:xxx, these are the cause of the anomaly, generally we find the bottom of a caused by, There is often the root of the problem. If you can't solve, you can go to Google, Baidu search (search when not a large pile of anomalies to the previous post, pay attention to search the key parts.) In general, we encountered problems, 99.9% of predecessors have encountered, the basic can be resolved, I encountered the problem can not be solved basically is so dry, their own resolution of more, there is a feeling ~ finally hope that everyone in reading my blog will be harvested.
Nonsense will not say, the following summary of this online mall project, I will not be exhaustive, mainly divided into several modules to summarize, including what technology used, and so on, specific details I will be in the article with a quick link, you can view a specific blog post.
Recall this project, a total can be divided into these main modules: the construction of the project environment to build a background management system to build a front display page shopping cart related functions online payment function Mail and SMS send function domain name application and project deployment Form validation and report display

below for each module, do a specific analysis.

1. The project Environment constructs

This is a part of every project, and there will be a lot of messy problems, just beginning to learn ssh, always suffer from building the environment, because not too skilled, but skilled on the good, the main is to "rhythmic" to build, that is, to build an environmental project to be a step by step, a little bit of the ride, A lot of people come up and put the jar bag on the full guide, and then what configuration files Ah, all written or pasted from other places, and then a run, hang up ... Then all kinds of to find the problem, why bother. In this case, even if you build 10 times can not be handy. Eat a mouthful of food, the road to go step by step.
　　
SSH environment to build, I personally follow the process is:

Spring–> hibernate–> Spring Consolidation hibernate–> struts2–> Spring consolidation Struts2

Each step to write a test class test, this is very important, because the next step down, the error also know where the wrong step, where to find the problem, the most important thing is that this process skilled, the next time to take the environment is easy. For more information about the SSH environment, see the following blog:
　　
Integrate Struts2, Hibernate4.3 and Spring4.2
Basic additions and deletions, retrieval of service and action, and substitution of XML with annotations

2. Build the Backstage management system

Background Management System I'm using a Easyui build, to be honest, easyui I am also a little knowledge, the front end of things I understand is not deep, but understand a point, the specific use of the time is also various to check, also did not learn the system, so there is no good knowledge system, but does not affect to play.　　 Program apes like to say play a technology what, sounds like a very tall, slowly I also suffer some influence, also like to say, but I for the front end is really playing ... The
jquery Easyui is a collection of jquery-based UI Plug-ins, and the goal of jquery Easyui is to help Web developers easily create a rich and aesthetically pleasing UI interface.　　 Developers do not need to write complex JavaScript, and do not need to have a deep understanding of CSS styles, developers need to understand only a few simple HTML tags.
Easyui requests are AJAX requests, no new pages are available, all in the Tab tab or a pop-up window. Background management system is mainly divided into three parts: the category of commodity management, commodity management and sales management. Sales management at the end of the talk. 2.1 Management of commodity categories

This section is mainly concerned with Easyui environment and background frame Setup , database cascading query and paging , DataGrid data Display , Struts2 to consolidate JSON and Add, delete, update, and search for commodity categories .　　 This is also followed by a completion order for that part.
The DataGrid presents data in tabular form, and developers don't need to have specific knowledge to manipulate it, and it has a good help document, and in detail, I also introduced several ways to create a DataGrid in this project, and also briefly introduced some of the properties of the DataGrid,　　 As a primer, I am also a primer, a lot of development to master this technology.
Add a category, delete, update and search functions, mainly using the Easyui with the verification function, when adding the category of goods, verify the input box input is correct, whether required to fill, and so on; whether to select a row or a few lines at the time of deletion, update only one row at a time,　　 All of these are AJAX requests.
For more information about this section, I've categorized it, please refer to these posts:

Using Easyui to build a background page framework
Easyui menu Implementation
Database cascading queries and paging
based on Datagri D data Display features
Struts2 and JSON consolidation
DataGrid implementation Query and delete features
DataGrid implementation Add and update

The following are the problems I encountered:
S Lazy load exception problem in TRUTS2 and JSON consolidation
Hibernate4 execute save () or update () Invalid 2.2 Product Management

The management of goods also has to add delete operations, and the type of management is the same, there is a place is the addition of goods, need to upload photos of goods, here involves the Struts2 implementation of File upload function, we need to build a folder on the server to store uploaded files, Then write a model to receive files, about file upload, to write a special tool class, project development is such, common code must be extracted, even if only a code to be extracted. It's a habit, and it has to be done. Details of these posts are listed below:
　　
Building the basic module of commodity class
Query and delete the realization of the product function
Add and update the realization of the commodity function
Struts2 Implement file Upload function

3. Set up the foreground display page

Of course, the front page is not my design, this piece of content I summed up with the foreground display related to some background technology, such as: listeners get home data , timer sync home data ,hibernate two cache to deal with the cache of popular products and so on.
Before learning Serlvet, home page display data I did it, with a frame, the right display data, Then I jump to a servlet in the right-hand part of the index.jsp, and then the servlet goes to the database to take out all the items and put them in the request field with a new JSP page displayed in the past. This can be achieved, but very stupid. Here I used the listener to do this thing, first of all, I define a listener, in the event of the launch of the database all the merchandise information to take out, put into the application domain, and then the first page directly with El expression from the application domain to take it.
Another problem is that when I add a new product to the management system, I have to reboot Tomcat to add the new item to the application domain because it's been in the application domain for the first time, and it's dead. After the new addition is not in the application domain, in order to solve this problem, I used the timer to sync home data. So rewrite the previously written listener, set a timer in the listener, get the data of the merchandise in the database into the timer task, the first time to open immediately execute, and then execute every 6 hours (time can be arbitrarily set), that is, every 6 hours to regain the database of goods, to the application domain. The general website is also so dry, like Csdn's personal blog homepage is also, the daily update ranking, about 10 o'clock in the evening, I forget the specific time. At that time the refresh will see the data update, which also reduces the pressure on the server.

For the specific technical details of this section, see the following posts:
　　
Use the listener to get the data displayed on the home page
How the listener gets spring's configuration file
Thread, timer timing sync Home data
Hibernate level two cache processing home page top display

4. Shopping Cart related functions

Part of the shopping cart mainly involves the technology: the background of the processing of shopping carts and shopping items of the logic , filter to determine the landing , order of the cascading storage and page caching problems.
Shopping cart words are mainly backstage some of the implementation logic, shopping carts need to have shopping items, what meaning it. We know that we buy things on the day cat, we can put different products in the shopping cart, then there are a lot of goods in the shopping cart, the number of each product can be more than one, each product and its related information is a shopping item, so add a shopping cart, we first have to complete a shopping item, and then add this item to the shopping cart.
When the user wants to settle, we have to first judge the user has not landed, this use of filter technology, specifically filter a certain type of URL, in the filter to determine the current session there is no user object, if there is a description of the landing, direct release on the line, if not then jump to the landing page to allow users to log in, Landing completed to jump to the user originally want to go to the page. It's the same as the doorman ~ See the Gate ~
Just also mentioned, the order information contains shopping carts and shopping items, then we in the order warehousing, we must take into account their cascading issues, we can by the Pojo in both set the corresponding annotation attributes can be, but there is a prerequisite, like this has a foreign key association, Assign a value to the field in the foreign key portion of the corresponding Pojo before you enter the storage. For example, orders to add to the order item, the order in the item's attributes also have to assign a good value, and then you can give hibernate,hibernate according to the configuration of annotations (or XML files) together with their cascading warehousing.
Page caching problem refers to, when the user confirmed the order, if the point back, will return to the order confirmation page, just the order confirmation page came out again, and the session is still, information or just information, this is obviously not the result we want. We need to be in the foreground and backstage at the same time processing.
For the specific technical details of this section, please see the following posts:

Realization of basic function of shopping cart
The judgment of the filter to realize the landing function
Cascading warehousing and Page caching issues for order information

5. Online Payment function

This part mainly introduces some things about the Yeepay payment interface, in fact, the online payment function for different third parties are not the same, mainly to understand the online payment function development process, the specific technical details rely on the specific third-party information provided. But the general process is: Invoke the third party interface –> The third party calls the bank interface –> completes the payment –> the third party jumps to our specified page.
In this section, there is also an important technique that struts2 how to handle multiple model requests. General STRUTS2 Implementation of the modedriven<model> can be used in the action of the model, but now if there are two model how to complete it. In the struts2, there is another call Parametersaware interface, as long as the implementation of this interface, and define a storage parameter map, you can receive all the parameters in request requests, we can according to different parameters to determine which model to use, This method can solve the problem of STRUTS2 processing multiple model requests well.
For technical details on this section, please refer to the following posts:

Introduction to Online payment platform
A demo of the Yeepay payment process
Get the display of the Bank icon and payment page
The logic of completing the online payment function
How to handle multiple model requests in STRUTS2

6. Mail and SMS delivery function

Send the message and send this part of the message is relatively simple, are some fixed API, will be used on the line, can not remember to check, I can not remember. The mail sends the function to import the Mail.jar package, then sends the mail according to the process, SMS function must first go to apply for a message to send the function, the application is good, the third party will give us some API interface, we only reference his can develop the text messaging function, with the payment function is a bit similar, are aided by the Third-party platform.
This part also does not have any technical difficulty, mainly is the flow, the related post is as follows:

Use Java email to send email to users
After the completion of the order to pay the success of the SMS delivery function

7. Application of domain name space and deployment release of project

This piece mainly introduced how to apply for a free domain name space (free 15 days only ~ But for the study, enough~), although not all free, but we are mainly to find out this process, go through it again, not necessarily upload the complete project, A JSP page or an HTML static page is OK.
There are two main ways to deploy and publish a project: One is the use of FTP upload, but this is slow, and there may be loss of data, personal experience is 1.1 point of hair; there is another way is to request a domain space where there will be a deployed environment, we just export the project as a war package, Then you can deploy the war package.
There are a lot of details to be aware of before a project is deployed, such as modifying some paths, modifying some data, and so on, which are described in detail in my blog. This section is a blog post, as follows:

Application of domain name space and deployment release of project

8. Form validation and report display

Added to this is the Ajax Dynamic update of the number of items in the cart, the verification of the form , and the display of the report .
Ajax Dynamic Update the number of items in the shopping cart is pure Ajax technology, I learned a little bit, the form of verification is mainly landing form, this project I did not do landing, but the landing form I did a, the verification function is done, the main use of jquery validate verification plug-ins,　　This plugin is still very powerful, you can directly add the landing form to the project, set up a corresponding jump can be. Report of the main use of the display is Jschart, this tool is very useful, you can generate a response to the JS code, we have to do is to send Ajax request to the background, according to the actual needs from the background to take out data, to the front desk with a Jschart chart to show it.
This section of the blog, which I listed to put in the following:

Local updating of product quantity and total price using AJAX technology
Jquery-validate Verify the use of the plug-in steps
Display merchandise Sales report in the background using Jschart technology

Online Mall This project is now written so much, csdn download channel source and my blog is synchronized, if you need to download my csdn in the source code (free ~ All my resources are free). If the latter is to continue to improve, I will be placed in my GitHub, but also welcome you to follow my GitHub (although generally like ~) Star I uploaded the project ~ below is the specific download address:

CSDN Download address (sync with blog content)
GitHub Download Address (later if any updates will be placed here)

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-– more articles please see: http://blog.csdn.net/eson_15