java - After idea creates a multi-modules project, tomcat fails to start

After my project directory is created, it is as shown in the figure below: But after starting tomcat, an error...

From [Javadiscussion group] 2017-06-30 09:52:52 0  2  1376

java - Senior masters, please give me some methods or learning experience for learning source code.

Now most technical teams are required to see the source code of the basic framework and understand the princip...

From [Javadiscussion group] 2017-06-30 09:52:33 0  4  1187

java - spring boot framework uses restful to verify whether the username exists

When using restful style to verify whether the user name exists, all normal names can be verified, but when ve...

From [Javadiscussion group] 2017-06-28 09:25:42 0  2  1308

MongoDB closes connection - Stack Overflow

Why is the MongoDB connection pool closed when the data is not saved?

From [Javadiscussion group] 2017-06-28 09:25:36 0  1  1187

java - I have configured a data source, why is it prompted that there is more than one bean of "DataSource" type?

I seem to have configured only one data source. Why is it prompted that there are multiple data sources when i...

From [Javadiscussion group] 2017-06-28 09:25:25 0  1  1420

How to autowire an interface in Comparator class

Using springboot and mongo's repository, I defined a Comparator class and wanted to implement my own object co...

From [Javadiscussion group] 2017-06-28 09:24:59 0  1  1061

java - TimerTask is not all executed successfully

I created a TimerManager class to allow the system to execute the corresponding four tasks after it is running...

From [Javadiscussion group] 2017-06-28 09:24:54 0  1  1029

Why in Java, when assigning variables i3, i4 with the same data type, System.out.println(i3==i4), the final output is not equal?

System.out.println(i3==i4), why the output result is not true {code...}

From [Javadiscussion group] 2017-06-28 09:24:50 0  2  1171

Java outputs each character in a string containing commas

{code...} The output is The result I want is: 1 {code...}

From [Javadiscussion group] 2017-06-28 09:24:45 0  3  1122

jdbc - About the error: java.sql.SQLException: ResultSet.next not called

1.` public Res evaluateCourse(@FormParam("stuId") int stuId, @FormParam("score") String sc...

From [Javadiscussion group] 2017-06-28 09:24:44 0  1  956

Converting a JSONArray into a new JSONArray based on the type inside it - Stack Overflow

There is an existing LIST: {code...} The list I want to get: {code...} The original list, all disease systems,...

From [Javadiscussion group] 2017-06-28 09:24:41 0  3  1182

CAS issue with AtomicInteger - Stack Overflow

{Code...} This is an auto-increment operation, definition: CAS has 3 operands, memory value V, old expected va...

From [Javadiscussion group] 2017-06-28 09:24:31 0  1  903

java - Local json data adjusted using jquery's ajax in vue fails

(www.sf.gg) is China's leading developer technology community. We hope to provide a pure, high-quality technic...

From [Javadiscussion group] 2017-06-28 09:24:26 0  3  1000

Question: How to specify some attributes of the javaBean object and then convert it to a json string

There are many attributes in javabean, but in fact only some of the attributes need to be converted into json ...

From [Javadiscussion group] 2017-06-28 09:24:15 0  4  1320

java - After downloading the tomcat installation package, and then entering startup.bat on the command line, a command that is not internal or external appears. Why and how to solve it?

After downloading the tomcat installation package, and then entering startup.bat on the command line, a comman...

From [Javadiscussion group] 2017-06-28 09:24:07 0  2  1292