Learning Spring.
I changed the sample code of the book a little, but
NullPointerException.
public classProductSampleRun{
@Autowired
private ProductService productService;
public static void main(String args[]){
ProductSampleRun productSampleRun=new ProductSampleRun();
productSampleRun.execute();
}
public void execute() {
// BeanFactory ctx = new ClassPathXmlApplicationContext(
// "/spring/application-config.xml";
// ProductService productService=ctx.getBean(ProductService.class);
productService.addProduct(newProduct(" stapler",100));
Product product=productService.findByProductName(" stapler");
System.out.println(product);
}
}
As an accompanying information
ProductServiceImple is registered as @Component.
The web.xml contains ContextConfigLocation and ContextLoaderListener.
Component-Scan is written in the application-config.
I don't know Spring at all yet, but if you want to get Bean,
Do I have to do getBean without fail?(Comment section)
I thought I could use @Autowired...
If it's a web project with SpringMVC, you should be able to go with @Autowired or @Resource.
public static void main(String args[]){
ProductSampleRun productSampleRun=new ProductSampleRun();
productSampleRun.execute();
}
The ProductSampleRun object was not managed by Spring, so Autowired did not work.
String[]xmlCfg = new String[] { "classpath:/spring/applicationContext-service.xml",
"classpath:/spring/applicationContext-util.xml",
"classpath:/spring/applicationContext.xml" };
ApplicationContext context=newFileSystemXmlApplicationContext(xmlCfg);
// 取 InspectionUtil bean
ProductSampleRun productSample=(ProductSampleRun) context.getBean(ProductSampleRun.class);
Try retrieving Bean using ApplicationContext as shown in .
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