Recent questions tagged JAVA

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java - How does @Transactional influence current session in Hibernate?

This is a typical setup used in most DAO: @Transactional @Repository public class DAO { @Autowired SessionFactory ... all by itself? 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 - Android - download JSON file from url

Is it possible to download a file with JSON data inside it from a URL? Also, the files I need to get have ... values in as I retrieve the 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 - Hibernate Criteria API - adding a criterion: string should be in collection

I have to following entity object @Entity public class Foobar { ... private List<String> uuids; ... } ... to make the appropriate criterion. 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 - jaxws 2.1.5 on weblogic 10.3.1 instead of pre-installed jaxws 2.1.1?

Is it possible, and when yes, how? 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 - (Generics)Cannot make a static reference to the non-static type T

running the Demo class will invoke a static method newInstance in SomeClass to call the constructor and printing hello ... String.class); } } 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 mock local variables using mockito or powermock

I have scenario like this InputStreamReader reader = new InputStreamReader(getFileAsStream(resourceResolver, iconpath)); ... stream); } 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 - ReactiveSecurityContextHolder.getContext() is empty but @AuthenticationPrincipal works

I've been using ReactiveAuthenticationManager in Spring Security + Webflux. It is customised to return an ... cannot return authentication? 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 add two vertical lines with JavaFX LineChart

My desktop application has a timer for starting and stopping a test. On the graph, I want to create two vertical ... yAxis.setLabel("deg/s"); 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 all table names set up in SessionFactory

Is there a way to retrieve the name of all tables that are managed by the SessionFactory? For instance, ... .addAnnotatedClass(...))? 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 - Hibernate: Select entities where collection contains all of the specified valus

I need assistance with a tricky hibernate query problem. I have the following entities: public class Book { private ... very much in advance. 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 make the QueryParser in Lucene handle numeric ranges?

new QueryParser(.... ).parse (somequery); it works only for string indexed fields. Say i have a field called ... need the above one only... 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 find documents matching multiple criteria

I'm trying to query a collection using operands AND'd together. I've got the shell version working: db.widgets. ... ; Any ideas what is wrong? 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 does a value in an entry in the WeakHashMap gets garbage collected when the actual object is garbage collected?

First of all I would like to clarify my understanding of the WeakReference as the following question depends on ... actual object is collected. 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 - Android Sqlite: Check if row exists in table

I have an array of strings that need to be checked if exists in a table before inserting them in order to ... if the product exists or not? 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 obtain last insert id in Oracle using MyBatis?

I'm inserting some data into an Oracle table and need to retrieve the id of the inserted row. Said id ... advice would be greatly appreciated. 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 security login always lands in an error page with no message

I'm using a login form for a small project in Spring but I have a small problem which is that every time I log ... /home as expected. It's odd. 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 - Is there a way to only have the OK button in a JOptionPane showInputDialog (and no CANCEL button)?

I've seen that this is possible in other types of dialog windows such as "showConfirmDialog", where one can ... but any help is appreciated. 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 - Listening for TCP and UDP requests on the same port

I am writing a Client/Server set of programs Depending on the operation requested by the client, I use make TCP ... .run(UDPThread.java:25) 10x 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 - @BatchSize but many round trips when fetching a @ManyToOne association

I use pagination with hibernate spring-data-jpa and querydsl and i use @BatchSize(size=10) to make just one round-trip ... .... 10 - round-trip 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 - JSP Document/JSPX: what determines how tabs/space/linebreaks are removed in the output?

I've got a "JSP Document" ("JSP in XML") nicely formatted and when the webpage is generated and sent to ... are included/removed in the output? 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 - Database Fail Over in Jboss Data sources

In JBoss data source how can I give multiple connection strings for database fail over in which I want . There ... configure this in my JBoss? 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 - ClassCastException $Proxy cannot be cast to using aop

I was using spring to create objects through beans. Now I tried to use aop to create the same object and ... help will be appreciated. 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 - Accessing resources in JSP page of Spring MVC app

I am fairly new to spring and I am having issues with accessing my resources in my Spring mvc app. I have tried ... I would be happy to supply. 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 - Difference between Hibernate mapping file and annotation

Today I was trying to create a application using Hibernate as ORM. So while creating I had a doubt. What ... Please help me in understanding. 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 - Selenium - org.openqa.selenium.WebDriverException: f.QueryInterface is not a function

@Test public void myDriver() throws IOException, InterruptedException { FirefoxDriver myD = new FirefoxDriver(); ... command_processor.js:10778) 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 - 301 Moved Permanently

I'm trying to get HTML by URL in Java. But 301 Moved Permanently is all that I've got. Another URLs work. ... str=sb.toString();//returns 301 } 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 - JSON Jquery to Struts2 action

I want to send my JSON object from Javscript to Struts2 Action. Sample JSON Object { "lists":["list1","list2" ... Class.. PLEASE HELP Thank you See Question&Answers more detail:os...

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

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961 views

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java - Hibernate with two foreign keys from same table- annotation

I'm trying to design a hospitality app. I have two tables as User and Request. Users could be Host or Visitor ... private Long req_id; .... } See Question&Answers more detail:os...

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

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