有人知道可以用来验证 Spring 配置文件的 Maven 插件吗？通过验证，我的意思是：
我四处寻找，没有找到任何东西。
Maven 插件非常适合我的用途，但任何其他工具（Eclipse 插件等）都会受到赞赏。
【问题讨论】：
标签： spring validation maven-2 configuration
这是Spring IDE update site（Eclipse 插件）的 URL。它执行您上面描述的操作。他们的site 似乎不可用。
【讨论】：
我们在项目中所做的只是编写一个加载 Spring 配置的 JUnit 测试。这做了一些你描述的事情：
它不会检查是否没有孤立的 bean。无论如何，考虑到代码中的任何地方，都没有可靠的方法来执行此操作，您可以直接根据它们的 ID 查找 bean。仅仅因为一个 bean 没有被任何其他 bean 引用并不意味着它没有被使用。事实上，所有的 Spring 配置都至少有一个 bean 没有被其他 bean 引用，因为层次结构总是必须有一个根。
如果您有依赖于真实服务（如数据库或其他东西）的 bean，并且您不想在 JUnit 测试中连接到这些服务，您只需抽象配置以允许测试价值观。这可以通过PropertyPlaceholderConfigurer 之类的方法轻松完成，它允许您在每个环境的单独配置文件中指定不同的属性，然后由一个 bean 定义文件引用。
编辑（包括示例代码）：
我们这样做的方式是至少有 3 个不同的 spring 文件...
applicationContext.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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<import resource="classpath:beanDefinitions.xml"/>
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="file:path/environment.properties" />
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driver}" />
...
</bean>
... <!-- more beans which shouldn't be loaded in a test go here -->
</beans>
beanDefinitions.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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<bean id="myBean" class="com.example.MyClass">
...
</bean>
<bean id="myRepo" class="com.example.MyRepository">
<property name="dataSource" ref="dataSource"/>
...
</bean>
... <!-- more beans which should be loaded in a test -->
</beans>
testContext.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 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<import resource="classpath:beanDefinitions.xml"/>
<bean id="dataSource" class="org.mockito.Mockito" factory-method="mock">
<constructor-arg value="org.springframework.jdbc.datasource.DriverManagerDataSource"/>
</bean>
</beans>
这里发生了很多事情，让我解释一下......
现在我们有了一个不害怕从测试中加载的测试上下文，下面是执行此操作的代码...
SpringContextTest.java 包 com.example;
import org.junit.Test;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;
public class SpringContextTest {
@Test
public void springContextCanLoad() {
XmlBeanFactory factory = new XmlBeanFactory(new ClassPathResource("testContext.xml"));
for (String beanName : factory.getBeanDefinitionNames()) {
Object bean = factory.getBean(beanName);
// assert anything you want
}
}
}
这可能不是最佳的方法； ApplicationContext 类是加载弹簧上下文的推荐方式。以上内容或许可以替换为：
@Test
public void springContextCanLoad() {
ApplicationContext context = new FileSystemXmlApplicationContext("classpath:testContext.xml");
}
我相信一行代码就可以完成验证弹簧上下文是否正确连接所需的一切。从那里，您可以像以前一样加载 bean 和断言。
希望这会有所帮助！
【讨论】：
我在谷歌搜索时遇到了这个问题 - 我有完全相同的问题。
我已经编写了一个（非常未经测试）Maven 插件来做到这一点。它目前仅支持 WAR，但可以轻松扩展。此外，我不关心实际加载 bean，因为我不想为了满足这个插件而不得不维护大量属性的麻烦。
如果有用的话，就在这里：
package myplugins;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.project.MavenProject;
import org.springframework.beans.MutablePropertyValues;
import org.springframework.beans.PropertyValue;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.config.ConstructorArgumentValues;
import org.springframework.beans.factory.support.DefaultListableBeanFactory;
import org.springframework.beans.factory.xml.XmlBeanDefinitionReader;
import org.springframework.core.io.FileSystemResource;
import org.springframework.util.ClassUtils;
import java.io.File;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Validates Spring configuration resource and class references
* using a classloader that looks at the specified WAR's lib and classes
* directory.
* <p/>
* It doesn't attempt to load the application context as to avoid the
* need to supply property files
* <br/>
* TODO: maybe one day supplying properties will become an optional part of the validation.
*
* @goal validate
* @aggregator
* @phase install
*/
public class WarSpringValidationMojo extends AbstractMojo
{
private final static String FILE_SEPARATOR = System.getProperty("file.separator");
/**
* Project.
* @parameter expression="${project}"
* @readonly
*/
private MavenProject project;
/**
* The WAR's root Spring configuration file name.
*
* @parameter expression="${applicationContext}" default-value="webAppConfig.xml"
*/
private String applicationContext;
/**
* The WAR's directory.
*
* @parameter expression="${warSourceDirectory}" default-value="${basedir}/target/${project.build.finalName}"
*/
private File warSourceDirectory;
@SuppressWarnings("unchecked")
public void execute() throws MojoExecutionException
{
try
{
if ("war".equals(project.getArtifact().getType()))
{
File applicationContextFile = new File(warSourceDirectory, "WEB-INF" + FILE_SEPARATOR + applicationContext);
File classesDir = new File(warSourceDirectory, "WEB-INF" + FILE_SEPARATOR + "classes");
File libDir = new File(warSourceDirectory, "WEB-INF" + FILE_SEPARATOR + "lib");
Set<URL> classUrls = new HashSet<URL>();
if (classesDir.exists())
{
classUrls.addAll(getUrlsForExtension(classesDir, "class", "properties"));
}
if (libDir.exists())
{
classUrls.addAll(getUrlsForExtension(libDir, "jar", "zip"));
}
ClassLoader parentClassLoader = Thread.currentThread().getContextClassLoader();
ClassLoader classLoader = new URLClassLoader(classUrls.toArray(new URL[classUrls.size()]), parentClassLoader);
ClassUtils.overrideThreadContextClassLoader(classLoader);
DefaultListableBeanFactory factory = new DefaultListableBeanFactory();
factory.setBeanClassLoader(classLoader);
XmlBeanDefinitionReader reader = new XmlBeanDefinitionReader(factory);
reader.setValidating(true);
reader.loadBeanDefinitions(new FileSystemResource(applicationContextFile));
for (String beanName : factory.getBeanDefinitionNames())
{
validateBeanDefinition(classLoader, factory.getBeanDefinition(beanName), beanName);
}
getLog().info("Successfully validated Spring configuration (NOTE: validation only checks classes, " +
"property setter methods and resource references)");
}
else
{
getLog().info("Skipping validation since project artifact is not a WAR");
}
}
catch (Exception e)
{
getLog().error("Loading Spring beans threw an exception", e);
throw new MojoExecutionException("Failed to validate Spring configuration");
}
}
private void validateBeanDefinition(ClassLoader beanClassloader, BeanDefinition beanDefinition, String beanName) throws Exception
{
Class<?> beanClass = validateBeanClass(beanClassloader, beanDefinition, beanName);
validateBeanConstructor(beanDefinition, beanName, beanClass);
validateBeanSetters(beanDefinition, beanName, beanClass);
}
private Class<?> validateBeanClass(ClassLoader beanClassloader, BeanDefinition beanDefinition, String beanName) throws Exception
{
Class<?> beanClass;
try
{
beanClass = beanClassloader.loadClass(beanDefinition.getBeanClassName());
}
catch (ClassNotFoundException e)
{
throw new ClassNotFoundException("Cannot find " + beanDefinition.getBeanClassName() +
" for bean '" + beanName + "' in " + beanDefinition.getResourceDescription(), e);
}
return beanClass;
}
private void validateBeanConstructor(BeanDefinition beanDefinition, String beanName,
Class<?> beanClass) throws Exception
{
boolean foundConstructor = false;
ConstructorArgumentValues constructorArgs = beanDefinition.getConstructorArgumentValues();
Class<?>[] argTypes = null;
if (constructorArgs != null)
{
Constructor<?>[] constructors = beanClass.getDeclaredConstructors();
int suppliedArgCount = constructorArgs.getArgumentCount();
boolean isGenericArgs = !constructorArgs.getGenericArgumentValues().isEmpty();
for (int k = 0; k < constructors.length && !foundConstructor; k++)
{
Constructor<?> c = constructors[k];
knownConstructorLoop:
{
Class<?>[] knownConstructorsArgTypes = c.getParameterTypes();
if (knownConstructorsArgTypes.length == suppliedArgCount)
{
if (isGenericArgs)
{
foundConstructor = true; // TODO - support generic arg checking
}
else
{
for (int i = 0; i < knownConstructorsArgTypes.length; i++)
{
Class<?> argType = knownConstructorsArgTypes[i];
ConstructorArgumentValues.ValueHolder valHolder = constructorArgs.getArgumentValue(i,
argType);
if (valHolder == null)
{
break knownConstructorLoop;
}
}
foundConstructor = true;
}
}
}
}
}
else
{
try
{
Constructor c = beanClass.getConstructor(argTypes);
foundConstructor = true;
}
catch (Exception ignored) { }
}
if (!foundConstructor)
{
throw new NoSuchMethodException("No matching constructor could be found for bean '" +
beanName + "' for " + beanClass.toString() + " in " + beanDefinition.getResourceDescription());
}
}
private void validateBeanSetters(BeanDefinition beanDefinition, String beanName, Class<?> beanClass) throws Exception
{
MutablePropertyValues properties = beanDefinition.getPropertyValues();
List<PropertyValue> propList = properties.getPropertyValueList();
try
{
Method[] methods = beanClass.getMethods();
for (PropertyValue p : propList)
{
boolean foundMethod = false;
String propName = p.getName();
String setterMethodName = "set" + propName.substring(0, 1).toUpperCase();
if (propName.length() > 1)
{
setterMethodName += propName.substring(1);
}
for (int i = 0; i < methods.length && !foundMethod; i++)
{
Method m = methods[i];
foundMethod = m.getName().equals(setterMethodName);
}
if (!foundMethod)
{
throw new NoSuchMethodException("No matching setter method " + setterMethodName
+ " could be found for bean '" + beanName + "' for " + beanClass.toString() +
" in " + beanDefinition.getResourceDescription());
}
}
}
catch (NoClassDefFoundError e)
{
getLog().warn("Could not validate setter methods for bean " + beanName +
" since getting the methods of " + beanClass + " threw a NoClassDefFoundError: "
+ e.getLocalizedMessage());
}
}
private Collection<? extends URL> getUrlsForExtension(File file, String... extensions) throws Exception
{
Set<URL> ret = new HashSet<URL>();
if (file.isDirectory())
{
for (File childFile : file.listFiles())
{
ret.addAll(getUrlsForExtension(childFile, extensions));
}
}
else
{
for (String ex : extensions)
{
if (file.getName().endsWith("." + ex))
{
ret.add(file.toURI().toURL());
break;
}
}
}
return ret;
}
}
以及插件的 pom.xml：
<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
... <my project's parent> ...
</parent>
<groupId>myplugins</groupId>
<artifactId>maven-spring-validation-plugin</artifactId>
<version>1.0</version>
<packaging>maven-plugin</packaging>
<name>Maven Spring Validation Plugin</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-project</artifactId>
<version>2.0.8</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>3.0.7.RELEASE</version>
</dependency>
</dependencies>
</project>
安装后，在 WAR 模块的根级别运行：
mvn myplugins:maven-spring-validation-plugin:validate
【讨论】：