加载类路径中 jar 内的 spring 应用程序上下文文件
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Loading spring application context files that are inside a jar in classpath
提问by Abhishek
I am trying to use ClassPathXmlApplicationContext in my java standalone code to load applicationContext.xml that is inside a jar file which is in my class path.
我试图在我的 java 独立代码中使用 ClassPathXmlApplicationContext 来加载位于我的类路径中的 jar 文件中的 applicationContext.xml。
ApplicationContext context = new ClassPathXmlApplicationContext("classpath*:**/applicationContext*.xml");
applicationContext.xml entry as follows,
applicationContext.xml 条目如下，
<bean id="myAdder" class="com.foo.bar.MyAdder">
<property name="floatAdder" ref="floatAdder"/>
</bean>
And, when I try to load a bean that way I am getting NoSuchBeanException. Can't a bean by loaded in this way?
而且，当我尝试以这种方式加载 bean 时，我收到了 NoSuchBeanException。不能以这种方式加载 bean 吗？
The jar file is added to my classpath as a maven dependency. When I see the Java Build Path in Eclipse for this project, I see this jar linked as M2_REPO/.../..
jar 文件作为 maven 依赖项添加到我的类路径中。当我在 Eclipse 中看到这个项目的 Java Build Path 时，我看到这个 jar 链接为 M2_REPO/.../..
I was assuming I can load the bean inside the jar file as the jar is in classpath this way. Am I missing something?
我假设我可以在 jar 文件中加载 bean，因为 jar 以这种方式在类路径中。我错过了什么吗？
Thanks,Abi
谢谢，阿比
回答by abalogh
This should work, I just created the 2 projects and checked.
这应该有效，我刚刚创建了 2 个项目并进行了检查。
Project A (standard Maven project created with STS) has applicationContext.xmlin src/main/resources.
项目 A（使用 STS 创建的标准 Maven 项目）applicationContext.xml在 src/main/resources 中。
pom.xml:
pom.xml:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.D</groupId>
<artifactId>A</artifactId>
<version>0.0.1-SNAPSHOT</version>
<properties>
<spring.version>3.0.5.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
</project>
applicationContext.xml:
应用上下文.xml：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="myAdder" class="com.foo.bar.MyAdder">
<property name="foo" value="bar" />
</bean>
</beans>
Project B:
项目乙：
pom.xml: same as A, except A is added as dependency:
pom.xml：与A相同，除了A作为依赖添加：
<dependency>
<groupId>org.D</groupId>
<artifactId>A</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
Start.java in project B:
项目 B 中的 Start.java：
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext(
"classpath*:**/applicationContext*.xml");
MyAdder myAdder = (MyAdder) context.getBean("myAdder");
System.out.println(myAdder.getFoo());
}
mvn install A first, then run Start in project B.
首先 mvn install A，然后在项目 B 中运行 Start。
回答by Darien
Do you really need the classpath*:prefix on that location? (Is that *legal?) I would have expected something more like:
你真的需要classpath*:那个位置的前缀吗？（这*合法吗？）我会期待更像：
ApplicationContext context = new ClassPathXmlApplicationContext("**/applicationContext*.xml);
