java-web - Java WEB: What kind of jar package must be placed under WEB-INF? If some packages are placed outside, tomcat will not be able to start.

There are two jar packages commons-fileupload-1.3.2.jar and commons-io-2.5.jar. I initially put these two pack...

From [Javadiscussion group] 2017-05-17 09:58:05 0  5  1060

Advantages of tomcat?

Can you help summarize the characteristics and advantages of tomcat? Thanks

From [Javadiscussion group] 2017-05-17 09:58:03 0  3  962

Why do Java local variables need to be initialized?

Why do Java local variables need to be initialized? Thanks.

From [Javadiscussion group] 2017-05-17 09:58:02 0  2  595

Algorithm - How to implement QQ multi-person chat avatar in Java

As shown in the figure 1: Please note that pictures cannot be superimposed on each other 2: It is best to use ...

From [Javadiscussion group] 2017-05-17 09:57:55 0  1  556

How to query mysql in java to get the following results in json format?

Now there are two tables in mysql. One is: table_a, which saves some name, url, page and other field informati...

From [Javadiscussion group] 2017-05-17 09:57:53 0  2  920

Tomcat deployment method

Generally, when enterprises deploy Tomcat, they deploy it in a Linux system. However, I deployed it on Windows...

From [Javadiscussion group] 2017-05-17 09:57:50 0  1  838

java - How to transfer values ​​​​between the controller layer and the service layer?

The controller layer and service layer of the current architecture use map<string, string> to tr...

From [Javadiscussion group] 2017-05-17 09:57:48 0  4  1182

java - HTTP request to obtain file output stream, how to convert it to file

Excuse me, I send a request to return a file stream. Field name: ouput Type: ouputStream jsonObject.get("...

From [Javadiscussion group] 2017-05-17 09:57:43 0  1  615

java - How to separate the front-end and back-end to solve the problem of too much back-end data?

Recently, I am writing a project that separates the front and back ends. The back end returns json data. Sprin...

From [Javadiscussion group] 2017-05-17 09:57:41 0  5  911

java - spring injection is null problem

As shown in the figure: {Code...} After the created class implemented HandlerMethodArgumentResolver, it was fo...

From [Javadiscussion group] 2017-05-17 09:57:40 0  2  514

java - Interview question, 100,000 devices are required to check the online status. What technology should be used?

I don’t know much about high concurrency, how should I deal with it? Are there any introductory books on high ...

From [Javadiscussion group] 2017-05-17 09:57:38 0  9  902

java - Questions about JD single sign-on authentication

The picture above is an http request during JD.com's single point authentication process. His process is as fo...

From [Javadiscussion group] 2017-05-17 09:57:37 0  2  725

java - How is it appropriate for multiple clients to operate MQ?

I have 500 sub-applications deployed on 500 different servers, as well as a main application, and now an MQ. M...

From [Javadiscussion group] 2017-05-17 09:57:34 0  1  562

java - What should I do if the paging button below disappears after paging the bootstrap table and how to return the total number of pages?

{code...} }

From [Javadiscussion group] 2017-05-17 09:57:32 0  1  643

I would like to ask for advice on using XMLHTTP to submit JSON and how to obtain it on the server side? Not from .Net

I would like to ask for advice on using XMLHTTP to submit JSON and how to obtain it on the server side? It’s n...

From [Javadiscussion group] 2017-05-11 15:47:15 0  1  1379