Recent questions tagged java

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java - JAX-WS client: maintain session/cookies across multiple services

I'm using Netbeans to automatically create webservice clients based off WSDL files. This works well, except the ... same session state with? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - GAE/J datastore backup

What is the easiest way to do a GAE/J datastore backup? It looks like there is python bulkloader.py tool to do ... any way to use python tool? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to return a set of objects with Spring Boot?

I did a lesson about Spring Boot and it works perfectly. But what if I want to return a set of objects ? ... .add(greeting2); return list; } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - org.hibernate.LazyInitializationException: could not initialize proxy - no Session, encore un fois

Foo looks has this in it : @ManyToMany private Set<User> favouritedBy; while user has this: @ManyToMany(mappedBy ... (Foo) crit.uniqueResult(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What does "subsequent read" mean in the context of volatile variables?

Java memory visibility documentation says that: A write to a volatile field happens-before every subsequent read of that ... cycle c1 + 1? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - OneToOne between two tables with shared primary key

I'm trying to set up the following tables using JPA/Hibernate: User: userid - PK name Validation: userid - PK, ... how to best solve this issue! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to use system environment variables in log4j.properties?

I added the system environment value PROJECT_HOME=C:Program FilesProject Now i'm trying to use the system environment ... log4j-1.2.7 version See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Jersey POST Method is receiving null values as parameters

I am developing RESTful services with Jersey and it works great with GET methods. However I can't make it work ... ... Thanks for your help! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What to use Flush Mode 'Auto' or 'Commit'

As my title described, I am using hibernate Auto flush mode mechanism in my application. So, when I ... /javadoc/org/hibernate/FlushMode.html See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How do I write to an OutputStream using DefaultHttpClient?

How do I get an OutputStream using org.apache.http.impl.client.DefaultHttpClient? I'm looking to write a ... = new OutputStreamWriter(out); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - log4j log file names?

We have several jobs that run concurrently that have to use the same config info for log4j. They are all ... they stay seperate? Thanks Tom See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - The code example which can prove "volatile" declare should be used

Currently I can't understand when we should use volatile to declare variable. I have do some study and searched ... compare to without using it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to check if a table or a column exists in a database?

I am trying to make simple java code that will check if a table and/or a column exists in a MySQL DB. Should I ... .println("Exists !"); } } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Are hoisting and reordering the same thing?

I read from Effective Java that In the absence of synchronization the following sequence A below can be converted into ... ) sequence B i++; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Get result from an activity after finish(); in an Android unit test

I'm currently writing some Android unit tests, and while I've gotten most things to work the way I want, one ... is finished. Can anyone help? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - What does "When a Class is loaded" actually mean?

It is said that static blocks in java run only once when that class is loaded. But what does it actually ... of execution of static blocks? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring-Boot behind a network proxy

I am currently implementing an OpenID authentication based on this example. Now I am developing behind a ... spring boot container? thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How can I prevent Jackson from serializing a polymorphic type's annotation property?

I have polymorphic types and deserializing from JSON to POJO works. I followed the documentation here, in ... ignore type when deserializing. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Set ripple effect on Image View

Got the following Image View: <ImageView android:id="@+id/header" android:layout_width="match_parent" android: ... made this as well. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to send XML POST requests with Spring RestTemplate?

Is it possible to send XML POST requests with spring, eg RestTemplate? I want to send the following xml to the ... I achieve this with spring? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring MVC 3 Return Content-Type: text/plain

I want to display simple text on a page and as such I want to return the Content-Type as text/plain. Using the ... m.health"; } JSP: ${status} See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Spring Boot: Hibernate and Flyway boot order

I have created Spring application. Pom xml is attached. It has a config like this (below) and some db/migration/ ... plugin> </plugins> </build> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to check if resultset has one row or more?

How to check if resultset has one row or more with JDBC? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Running spock unit tests with Maven

On a previous project I used the Spock testing framework to unit test my Java code. I found this really ... example as simple as possible.) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - How to call a specific parent constructor from anonymous inner class?

Ok, So I know that an anonymous inner class is either implicitly extending a parent class or implementing an ... there a way around this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - UTF-8 encoding of application.properties attributes in Spring-Boot

In my application.properties I add some custom attributes. custom.mail.property.subject-message=This is a ? ... the application.properties file? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Mark unit test as an expected failure in JUnit

How can I mark a test as an expected failure in JUnit 4? In this case I want to continue to run this test ... . Am I missing something in JUnit? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - JavaFX for server-side image generation

This could sound strange but I want to generate my chart images on server side using JavaFX. Because JavaFX has ... how to solve this issue? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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