java - 为什么我不使用 FileSystemResource 类读取 xml 文件

Question

问题:

我创建了一个程序，它将使用 FilesystemResource 从指定路径读取 applicationContext.xml 文件并调用 B.Method。我无法理解为什么我会收到这样的错误:

Can anyone guide me how to solve this problem:

下面是代码

public static void main(String[] args) {
    Resource res=null;
    BeanFactory factory=null;
    Object obj=null;
    WishMessageGenerator generator=null;
    //Locate Cfg File
    res=new FileSystemResource("com/jc/cfgs/applicationContext.xml");
    //Create IOC Container      
    factory=new XmlBeanFactory(res);
    //getBean Class Object      
    obj=factory.getBean("wish");
    //TypeCasting       
    generator=(WishMessageGenerator)obj;
    //Invoke Businees Method        
    System.out.println("Message ="+generator.wishMsg("jalaj"));

}

}

显示错误:

Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from file [/Users/mansi/Desktop/springapp/SpringApp4/com/jc/cfgs/applicationContext.xml]; nested exception is java.io.FileNotFoundException: com/jc/cfgs/applicationContext.xml (No such file or directory)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:344)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:79)
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:67)
at com.jc.test.Test.main(Test.java:20)
Caused by: java.io.FileNotFoundException: com/jc/cfgs/applicationContext.xml (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at org.springframework.core.io.FileSystemResource.getInputStream(FileSystemResource.java:115)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:330)
... 4 more

DirectoryStructure

Answer 1

如果资源位于类路径中，则不应使用旨在指定绝对路径的 FileSystemResource。

ClassPathResource也是一个org.springframework.core.io.Resource实现更合适。

在您的实际代码中，src 文件夹位于类路径中，因此这应该没问题:

res = new ClassPathResource("com/jc/cfgs/applicationContext.xml");