Spring Boot access static resources missing scr main resources

Question

I am working on a Spring Boot application  I need to parse an XML file  countries xml  on start  The problem is that I do not understand where to put it so that I could access it   My folders structure is   ProjectDirectory src main java ProjectDirectory src main resources countries xml   My first idea was to put it in src main resources  but when I try to create File  countries xml  I get a NPE and the stacktrace shows that my file is looked in the ProjectDirectory  so src main resources  is not added   I tried to create File  resources countries xml  and the path would look like ProjectDirectory resources countries xml  so again src main is not added    I tried adding this with no result   Override public void addResourceHandlers final ResourceHandlerRegistry registry        registry addResourceHandler   resources      addResourceLocations   resources         registry setOrder Ordered HIGHEST PRECEDENCE       super addResourceHandlers registry       I know that I can add src main  manually  but I want to understand why is it not working as it has to  I also tried examples with ResourceLoader - with the same no result    Could anyone suggest what the problem is   UPDATE  Just for future references - after building the project  I encountered problem with accessing file  so I changed File to InputStream     InputStream is   new ClassPathResource  countries xml   getInputStream

User · Answer

You need to use following construction   InputStream in   getClass   getResourceAsStream   yourFile      Please note that you have to add this slash before your file name

User · Answer

To get the files in the classpath    Resource resource   new ClassPathResource  countries xml    File file   resource getFile      To read the file onStartup use  PostConstruct    Configuration public class ReadFileOnStartUp         PostConstruct     public void afterPropertiesSet   throws Exception              Gets the XML file under src main resources folder         Resource resource   new ClassPathResource  countries xml            File file   resource getFile              Logic to read File            Here is a Small example for reading an XML File on Spring Boot App startup

User · Answer

Just use Spring type ClassPathResource   File file   new ClassPathResource  countries xml   getFile      As long as this file is somewhere on classpath Spring will find it  This can be src main resources during development and testing  In production  it can be current running directory    EDIT  This approach doesn t work if file is in fat JAR  In such case you need to use   InputStream is   new ClassPathResource  countries xml   getInputStream

User · Answer

Because java net URL is not adequate for handling all kinds of low level resources  Spring introduced org springframework core io Resource  To access resources  we can use  Value annotation or ResourceLoader class     Autowired       private ResourceLoader resourceLoader     Override     public void run String    args  throws Exception        Resource res   resourceLoader getResource  classpath thermopylae txt         Map lt String  Integer gt  words    countWords getWordsCount res        for  String key   words keySet               System out println key          words get key

User · Answer

I use Spring Boot  my solution to the problem was    src main resources myfile extension    Hope it helps someone

User · Answer

I use spring boot  so i can simple use   File file   ResourceUtils getFile  classpath myfile xml

User · Answer

You can use following code to read file in String from resource folder   final Resource resource   new ClassPathResource  public key    String publicKey   null  try        publicKey   new String Files readAllBytes resource getFile   toPath     StandardCharsets UTF 8     catch  IOException e         e printStackTrace

User · Answer

While working with Spring Boot application  it is difficult to get the classpath resources using resource getFile   when it is deployed as JAR as I faced the same issue   This scan be resolved using Stream which will find out all the resources which are placed anywhere in classpath   Below is the code snippet for the same -  ClassPathResource classPathResource   new ClassPathResource  fileName    InputStream inputStream   classPathResource getInputStream    content   IOUtils toString inputStream

[java] Spring Boot access static resources missing scr/main/resources

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