I&#39;m assuming the contents of `src/main/resources/` is copied to `WEB-INF/classes/` inside your .war at build time. If that is the case you can just do (substituting real values for the classname and the path being loaded).

    URL sqlScriptUrl = MyServletContextListener.class
                           .getClassLoader().getResource(&quot;sql/script.sql&quot;);

Finally, this is what I did:

    private File getFileFromURL() {
        URL url = this.getClass().getClassLoader().getResource(&quot;/sql&quot;);
        File file = null;
        try {
            file = new File(url.toURI());
        } catch (URISyntaxException e) {
            file = new File(url.getPath());
        } finally {
            return file;
        }
    }
...  

    File folder = getFileFromURL();
    File[] listOfFiles = folder.listFiles();




    import org.springframework.core.io.ClassPathResource;
    
    ...
    
    File folder = new ClassPathResource(&quot;sql&quot;).getFile();
    File[] listOfFiles = folder.listFiles();

It is worth noting that this will limit your deployment options, `ClassPathResource.getFile()` only works if the container has exploded (unzipped) your war file.

 
Just use **com.google.common.io.Resources** class. Example:

  

     URL url = Resources.getResource(&quot;file name&quot;)


After that you have methods like: **.getContent(), .getFile(),  .getPath() etc**

I&#39;d like to see the number of visitors on a specific page (for which I have URL).
I don&#39;t find in Analytics where to enter a URL in order to look for statistics for this specific page.


Number of visitors on a specific page

I would like to know if there&#39;s a way for a mysql query to return the username of the user that issues the query.

Is this possible?

Is there a way to know your current username in mysql?

I have the following directory layout:  

&gt; - src
&gt;   - main  
&gt;      - java 
&gt;      - resources  
&gt;           - **sql (scripts for database)**
&gt;           - spring (configuration)
&gt;      - webapp

Within a ServletContextListener class, I want to access the files under the SQL directory and list them. Basically my problem is with the path, because I know that listing files under a directory in a nutshell is:

    File folder = new File(path);
    File[] listOfFiles = folder.listFiles();

Maybe I could use the `ServletContextEvent` Object to try and build a path to `resources/sql`

    public void contextInitialized(ServletContextEvent event) {
        event.getServletContext(); //(getRealPath etc.)
    }

Does something exist to set that path in a relative, non-hardcoded way?
Something like `new File(&quot;classpath:sql&quot;)` (preferably spring if possible) or what should I do with the servletContext to point at `resources/sql`?

How to get resources directory path programmatically

I have the following directory layout:
> - src
> - main 
> - java
> - resources 
> - sql (scripts for database)
> - spring (configuration)
> - webapp
Within a ServletContextListener class, I want to access the files under the SQL directory and list them. Basically my problem is with the path, because I know that listing files under a directory in a nutshell is:
<pre><code class="hljs language-ini">File folder = new File(path);
File[] listOfFiles = folder.listFiles();
</code></pre>
Maybe I could use the <code>ServletContextEvent</code> Object to try and build a path to <code>resources/sql</code>
<pre><code class="hljs language-csharp">public void contextInitialized(ServletContextEvent event) {
 event.getServletContext(); //(getRealPath etc.)
}
</code></pre>
Does something exist to set that path in a relative, non-hardcoded way?
Something like <code>new File("classpath:sql")</code> (preferably spring if possible) or what should I do with the servletContext to point at <code>resources/sql</code>?

I am reading the spring 3.0.x reference documentation to understand Spring Autowired annotation:

[3.9.2 @Autowired and @Inject][1]


I am not able to understand the below examples. Do we need to do something in the XML for it to work? 

EXAMPLE 1

    public class SimpleMovieLister {

        private MovieFinder movieFinder;

        @Autowired
        public void setMovieFinder(MovieFinder movieFinder) {
            this.movieFinder = movieFinder;
        }

        // ...
    }


EXAMPLE 2 

    public class MovieRecommender {

        private MovieCatalog movieCatalog;

        private CustomerPreferenceDao customerPreferenceDao;

        @Autowired
        public void prepare(MovieCatalog movieCatalog,
                        CustomerPreferenceDao customerPreferenceDao) {
            this.movieCatalog = movieCatalog;
            this.customerPreferenceDao = customerPreferenceDao;
        }

        // ...
    }

How can the two classes be autowired implementing the same interface and using the same class? 

Example: 

    class Red implements Color
    class Blue implements Color

    class myMainClass{
        @Autowired 
        private Color color;

        draw(){
            color.design(); 
        } 
    }

Which design method will be called? How do I make sure the design method of Red class will be called and not Blue?


  [1]: http://docs.spring.io/spring/docs/3.0.x/reference/beans.html#beans-autowired-annotation

Understanding Spring @Autowired usage

I am wondering if this question can be solved in Java (I&#39;m new to the language). This is the code:

    class Condition {
        // you can change in the main
        public static void main(String[] args) { 
            int x = 0;
            if (x == x) {
                System.out.println(&quot;Ok&quot;);
            } else {
                System.out.println(&quot;Not ok&quot;);
            }
        }
    }

I received the following question in my lab: How can you skip the first case (i.e. make the `x == x` condition false) without modifying the condition itself?

How can a Java variable be different from itself?

I have a simple question about strings in Java. The following segment of simple code just concatenates two strings and then compares them with `==`.

    String str1=&quot;str&quot;;
    String str2=&quot;ing&quot;;
    String concat=str1+str2;

    System.out.println(concat==&quot;string&quot;);

The comparison expression `concat==&quot;string&quot;` returns `false` as obvious (I understand the difference between `equals()` and `==`).


----------

When these two strings are declared `final` like so,

    final String str1=&quot;str&quot;;
    final String str2=&quot;ing&quot;;
    String concat=str1+str2;

    System.out.println(concat==&quot;string&quot;);

The comparison expression `concat==&quot;string&quot;`, in this case returns `true`. Why does `final` make a difference? Does it have to do something with the intern pool or I&#39;m just being misled?

Comparing strings with == which are declared final in Java

I have an issue with connecting environment to my Spring project.
In this class 

    @Configuration
    @ComponentScan(basePackages = &quot;my.pack.offer.*&quot;)
    @PropertySource(&quot;classpath:OfferService.properties&quot;)
    public class PropertiesUtil {
        @Autowired
        private Environment environment;

       

        @Bean
        public String load(String propertyName)
        {
            return environment.getRequiredProperty(propertyName);
        }
    }

environment always is null. 




Autowired Environment is null

Java 8 introduced lambda functions and I want to implement something like factorial:
   

     IntToDoubleFunction fact = x -&gt; x == 0 ? 1 : x * fact.applyAsDouble(x-1);

Compilation returns
  

      error: variable fact might not have been initialized


How can I reference function itself. Class is anonymous but instance exists: It is called `fact`.

Implement recursive lambda function using Java 8

When I try to post new object with post method. RequestBody could not recognize contentType. Spring is already configured and POST could work with others objects, but not this specific one.


    org.springframework.web.HttpMediaTypeNotSupportedException: Content type &#39;application/json;charset=UTF-8&#39; not supported

If I try the same request just changing requestbody object. It works.



Spring Rest POST Json RequestBody Content type not supported

I&#39;m trying to secure my website using Spring security following the guides on the web. So on my server side the WebSecurityConfigurerAdapter and controller looks like this

    @Configuration
    @EnableWebSecurity
    public class WebSecurityConfig extends WebSecurityConfigurerAdapter
    implements ApplicationContextAware {
    
    @Override
    protected void registerAuthentication(AuthenticationManagerBuilde r authManagerBuilder) throws Exception {
    authManagerBuilder.inMemoryAuthentication()
    .withUser(&quot;user&quot;).password(&quot;password&quot;).roles(&quot;ADMI N&quot;);
    }
    }
    
    @Controller
    //@RequestMapping(&quot;/course&quot;)
    public class CourseController implements ApplicationContextAware{
    
    @RequestMapping(value=&quot;/course&quot;, method = RequestMethod.GET, produces=&quot;application/json&quot;)
    public @ResponseBody List&lt;Course&gt; get(// The critirion used to find.
    @RequestParam(value=&quot;what&quot;, required=true) String what,
    @RequestParam(value=&quot;value&quot;, required=true) String value) {
    //.....
    }
    
    @RequestMapping(value=&quot;/course&quot;, method = RequestMethod.POST, produces=&quot;application/json&quot;)
    public List&lt;Course&gt; upload(@RequestBody Course[] cs) {
    }
    }


What confused me very much is the server does not respond to the POST/DELETE method, while the GET method works fine. BTW, I&#39;m using RestTemplate on the client side. Exceptions are:

    Exception in thread &quot;main&quot; org.springframework.web.client.HttpClientErrorException: 403 Forbidden
    	at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91)
    	at org.springframework.web.client.RestTemplate.handleResponseError(RestTemplate.java:574)
    	at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:530)
    	at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:487)
    	at org.springframework.web.client.RestTemplate.delete(RestTemplate.java:385)
    	at hello.Application.createRestTemplate(Application.java:149)
    	at hello.Application.main(Application.java:99)

I&#39;ve searched the internet for days. Still don&#39;t have a clue. Please help. Thanks so much

spring security 403 error

Using HTTP dev client with Post request and Content-Type application/x-www-form-urlencoded

### 1) Only @RequestBody

URL: localhost:8080/SpringMVC/welcome  
Body: name=abc

    @RequestMapping(method = RequestMethod.POST)
    public String printWelcome(@RequestBody String body, Model model) {
    	model.addAttribute(&quot;message&quot;, body);
    	return &quot;hello&quot;;
    }
    // Gives body as &#39;name=abc&#39; as expected


### 2) Only @RequestParam

URL: localhost:8080/SpringMVC/welcome  
In Body - name=abc

	@RequestMapping(method = RequestMethod.POST)
	public String printWelcome(@RequestParam String name, Model model) {
		model.addAttribute(&quot;name&quot;, name);
		return &quot;hello&quot;;
	}
    // Gives name as &#39;abc&#39; as expected


### 3) Both together

URL: localhost:8080/SpringMVC/welcome  
Body: name=abc

	@RequestMapping(method = RequestMethod.POST)
	public String printWelcome(
        @RequestBody String body, 
        @RequestParam String name, Model model) 
    {
		model.addAttribute(&quot;name&quot;, name);
		model.addAttribute(&quot;message&quot;, body);
		return &quot;hello&quot;;
	}
    // HTTP Error Code 400 - The request sent by the client was syntactically incorrect.


### 4) Above with params position changed

URL: localhost:8080/SpringMVC/welcome  
Body: name=abc

	@RequestMapping(method = RequestMethod.POST)
	public String printWelcome(
        @RequestParam String name, 
        @RequestBody String body, Model model) 
    {
		model.addAttribute(&quot;name&quot;, name);
		model.addAttribute(&quot;message&quot;, body);
		return &quot;hello&quot;;
	}
    // No Error. Name  is &#39;abc&#39;. body is empty


### 5) Together but get type url parameters

URL: localhost:8080/SpringMVC/welcome?name=xyz  
Body: name=abc

	@RequestMapping(method = RequestMethod.POST)
	public String printWelcome(
        @RequestBody String body, 
        @RequestParam String name, Model model) 
    {
		model.addAttribute(&quot;name&quot;, name);
		model.addAttribute(&quot;message&quot;, body);
		return &quot;hello&quot;;
	}
    // name is &#39;xyz&#39; and body is &#39;name=abc&#39;


### 6) Same as 5) but with parameters position changed

	@RequestMapping(method = RequestMethod.POST)
	public String printWelcome(
        @RequestParam String name, 
        @RequestBody String body, Model model) 
    {
		model.addAttribute(&quot;name&quot;, name);
		model.addAttribute(&quot;message&quot;, body);
		return &quot;hello&quot;;
	}
    // name = &#39;xyz,abc&#39; body is empty


Can someone explain this behaviour?

Spring MVC - Why not able to use @RequestBody and @RequestParam together

I try files writer as follows: 

    String content = &quot;Test File Content&quot;;

* I used as like : `Files.write(path, content.getBytes(), StandardOpenOption.CREATE);`

If file is not create, file is created and content is written. But If file available , the file content is `Test File ContentTest File Content` and if the code is run repeat, the file content is `Test File ContentTest File ContentTest File Content` ...


* I used as like : `Files.write(path, content.getBytes(), StandardOpenOption.CREATE_NEW);` , 

If file is not create, file is created and than thow an exception as follow:

&gt; java.nio.file.FileAlreadyExistsException:
&gt; /home/gyhot/Projects/indexing/ivt_new/target/test-classes/test_file
&gt; 	at
&gt; sun.nio.fs.UnixException.translateToIOException(UnixException.java:88)
&gt; 	at
&gt; ...

How to overwrite file via java new I/O?

How to overwrite file via java nio writer?

All port operations in Rebol 3 are asynchronous.  The only way I can find to do synchronous communication is calling `wait`.

But the problem with calling wait in this case is that it will check events for all open ports (even if they are not in the port block passed to wait).  Then they call their responding event handlers, but a read/write could be done in one of those event handlers.  That could result in recursive calls to &quot;wait&quot;.

How do I get around this?

Avoiding recursion when reading/writing a port synchronously?

I want to use `StreamWriter` to write a file to the temp folder.

It might be a different path on each PC, so I tried using `%temp%\SaveFile.txt` but it didn&#39;t work.

How can I save to the temp folder, using environmental variables?

And for example, can I use an environmental variable for storing files in `%appdata%`?

Writing File to Temp Folder

I&#39;m currently using a explicit cast to long and using `%ld` for printing `pid_t`, is there a specifier such as `%z` for `size_t` for `pid_t`?

If not what the best way of printing `pid_t`?


What is the correct printf specifier for printing pid_t

[The documentation for `File.listFiles()`][1] suggests that `null` will ONLY be returned in the case that the file calling it is not a directory.


I have the following:

    String dir = &quot;/storage/emulated/0&quot;;
    File f = new File(dir);
    Log.v(&quot;Files&quot;,f.exists()+&quot;&quot;);
    Log.v(&quot;Files&quot;,f.isDirectory()+&quot;&quot;);
    Log.v(&quot;Files&quot;,f.listFiles()+&quot;&quot;);

The log reads:

    true
    true
    null

For some reason, `listFiles(`) is returning `null` even though the `File` is recognized as a valid directory. I&#39;m not super familiar with Android file hierarchy behavior, so I would guess the problem lies in there.

For reference, I&#39;m debugging on my Moto X, and results are the same whether the phone is plugged in to my computer or not - so I don&#39;t think it has to do with mounting when plugged in.


  [1]: http://developer.android.com/reference/java/io/File.html#listFiles%28%29

Content Type	Original Author	Original Content on Stackoverflow
Question	yamilmedina	View Question on Stackoverflow
Solution 1 - Java	Dev	View Answer on Stackoverflow
Solution 2 - Java	yamilmedina	View Answer on Stackoverflow
Solution 3 - Java	samlewis	View Answer on Stackoverflow
Solution 4 - Java	grep	View Answer on Stackoverflow

How to get resources directory path programmatically

Java Problem Overview

Java Solutions

Solution 1 - Java

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Is there a way to know your current username in mysql?

Number of visitors on a specific page

Attributions