java - How consumers receive messages in major MQ products

After looking at the client code of RocketMQ, it uses schedule to initiate rpc requests to receive messages re...

From [Javadiscussion group] 2017-06-12 09:24:29 0  1  840

java - SSH cannot update data based on the id field

{code...} dao method {code...} action layer {code...} JSP page jumps according to id {code...} to enter the mo...

From [Javadiscussion group] 2017-06-12 09:24:19 0  2  760

io - java file operation, how to insert content (not replace content) to a specified location?

Java file operation, how to insert content into a specified location (not replace content)?

From [Javadiscussion group] 2017-06-12 09:24:18 0  2  868

java - Write lock degradation problem in read-write lock

When the write lock is downgraded, the thread that has currently acquired the write lock is required to hold t...

From [Javadiscussion group] 2017-06-12 09:24:17 0  3  1215

java - CompletableFuture allof timeout handling

The effect you want to achieve: If the future collection does not return within 3 seconds, the completed futur...

From [Javadiscussion group] 2017-06-12 09:24:13 0  1  1817

java-ee - JAVA8 lambdas expression changes the value of external variables

As shown in the picture, I defined an etotalPrice externally, and then tried to change this value in two for l...

From [Javadiscussion group] 2017-06-12 09:24:10 0  3  966

java - junit null pointer exception

java.lang.NullPointerException {code...}

From [Javadiscussion group] 2017-06-12 09:24:06 0  3  763

javascript - How to dynamically assign IDs when exporting multiple pieces of data?

When you click Export, you need to export all the data shown below. Each piece of data has an ID. Please tell ...

From [Javadiscussion group] 2017-06-12 09:24:05 0  2  689

javascript - A click event is added to an a tag, and I want to add a class style to the a tag within the time

There are multiple a tags in a span tag, and the a tags are implemented through ajax. I want to add a click ev...

From [Javadiscussion group] 2017-06-12 09:24:00 0  2  859

When the java type is forced to be converted to generic type V, no error is reported?

{Code...} ps: No error is reported when running.

From [Javadiscussion group] 2017-06-12 09:23:55 0  2  906

java - logback can generate files, but logs cannot be output to files?

When developing in eclipse, files can be generated normally in windows, and info and debug logs can also be ou...

From [Javadiscussion group] 2017-06-12 09:23:52 0  1  948

javascript - Can anyone take a look at how this website is implemented? Some pages are written in Vue.

http://bravetime.davdian.com/This is written by Vue. 1. Is this server-side rendering or a spa application? 2....

From [Javadiscussion group] 2017-06-12 09:23:49 0  1  678

Java background export page to pdf

It is a JSP page, and I want to export elements that can be seen by page users (tables, pictures, paragraphs, ...

From [Javadiscussion group] 2017-06-12 09:23:42 0  1  706

java - When using gradle to build a war package, a character error will occur on the deployment server

From [Javadiscussion group] 2017-06-12 09:23:39 0  1  666

java - springmvc uses modelandview to redirect to a requestmapping and carries an object type parameter.

{Code...} Please enter the code ModelAndView mv = new ModelAndView( {Code...} } {Code...}

From [Javadiscussion group] 2017-06-12 09:23:19 0  1  1005