groovy编写spring的controller(三)支持annotation

groovy编写spring的controller(三)支持annotation 自定义扩展spring，让groovy编写的controller支持annotation，参考了比较老的spring论坛上的帖子，当然自己也做了修改。因为帖子的时间比较久远，不晓得新版本的spring是不是早就支持了。不过还是记录一下。 参考文章 http://forum.springsource.org/showthread.php?p=253380 1、扩展spring，自定义了 xmlns:groovy="http://www.sillycat.com/schema/groovy" handler的代理类ProxyAwareAnnotationMethodHandlerAdapter.java，代码如下： package com.sillycat.easygroovyplugin.handlers; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.aop.TargetSource; import org.springframework.aop.framework.Advised; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter; public class ProxyAwareAnnotationMethodHandlerAdapter extends ?? AnnotationMethodHandlerAdapter { @Override public ModelAndView handle(HttpServletRequest request,??? HttpServletResponse response,Object handler) throws Exception { ?? handler = unwrapHandler(handler); ?? return super.handle(request,response,handler); } @Override public boolean supports(Object handler) { ?? handler = unwrapHandler(handler); ?? return super.supports(handler); } private Object unwrapHandler(Object handler) { ?? if (handler instanceof Advised) { ??? try { ???? TargetSource targetSource = ((Advised) handler) ?????? .getTargetSource(); ???? return targetSource.getTarget(); ??? } catch (Exception x) { ???? throw new RuntimeException(x); ??? } ?? } else { ??? return handler; ?? } } } groovy的namehandler类GroovyNamespaceHandler.java: package com.sillycat.easygroovyplugin.handlers; import org.springframework.beans.factory.xml.NamespaceHandlerSupport; import com.sillycat.easygroovyplugin.parsers.GroovyScanBeanDefinitionParser; public class GroovyNamespaceHandler extends NamespaceHandlerSupport { public void init() { ?? registerBeanDefinitionParser("scan",???? new GroovyScanBeanDefinitionParser()); } } 其中的解析XML配置的类GroovyScanBeanDefinitionParser.java: package com.sillycat.easygroovyplugin.parsers; import java.io.IOException; import org.springframework.beans.factory.config.BeanDefinition; import org.springframework.beans.factory.config.ConstructorArgumentValues; import org.springframework.beans.factory.support.GenericBeanDefinition; import org.springframework.beans.factory.xml.BeanDefinitionParser; import org.springframework.beans.factory.xml.ParserContext; import org.springframework.core.io.Resource; import org.springframework.core.io.ResourceLoader; import org.springframework.core.io.support.ResourcePatternResolver; import org.springframework.scripting.config.LangNamespaceUtils; import org.springframework.scripting.groovy.GroovyScriptFactory; import org.w3c.dom.Element; import com.sillycat.easygroovyplugin.utils.SystemConfiguration; public class GroovyScanBeanDefinitionParser implements BeanDefinitionParser { public BeanDefinition parse(Element element,ParserContext parserContext) { ?? String pattern = element.getAttribute("source-pattern"); ?? String filepath = SystemConfiguration.getString("groovy.file.path"); ?? pattern = filepath + pattern; ?? LangNamespaceUtils ???? .registerScriptFactoryPostProcessorIfNecessary(parserContext ?????? .getRegistry()); ?? try { ??? Resource[] resources = getResources(parserContext ????? .getReaderContext().getResourceLoader(),pattern); ??? for (Resource resource : resources) { ???? GenericBeanDefinition bd = new GenericBeanDefinition(); ???? bd.setBeanClass(GroovyScriptFactory.class); ???? bd.setSource(resource); ???? ConstructorArgumentValues cav = bd ?????? .getConstructorArgumentValues(); ???? int constructorArgNum = 0; ???? cav.addIndexedArgumentValue(constructorArgNum++,"file:/" ?????? + resource.getFile().getAbsolutePath()); ???? String beanName = parserContext.getReaderContext() ?????? .generateBeanName(bd); ???? parserContext.getRegistry() ?????? .registerBeanDefinition(beanName,bd); ??? } ?? } catch (IOException x) { ??? throw new RuntimeException(x); ?? } ?? return null; } private Resource[] getResources(ResourceLoader resourceLoader,??? String pattern) throws IOException { ?? if (resourceLoader instanceof ResourcePatternResolver) { ??? return ((ResourcePatternResolver) resourceLoader) ????? .getResources(pattern); ?? } else { ??? return new Resource[] { resourceLoader.getResource(pattern) }; ?? } } } 由于parser在取XML文件里面配置的${groovy.file.path}，虽然配置了spring的propertyConfigurer，但是还是解析不了。所以用了同事写的一个 SystemConfiguration.java来取得配置 package com.sillycat.easygroovyplugin.utils; import java.util.ArrayList; import java.util.List; import org.apache.commons.configuration.CompositeConfiguration; import org.apache.commons.configuration.ConfigurationException; import org.apache.commons.configuration.PropertiesConfiguration; import org.apache.commons.configuration.reloading.FileChangedReloadingStrategy; public class SystemConfiguration { private static CompositeConfiguration config; private static PropertiesConfiguration propertiesConfig; static { ?? config = new CompositeConfiguration(); ?? if (propertiesConfig == null) { ??? try { ???? propertiesConfig = new PropertiesConfiguration( ?????? "easygroovy.properties"); ???? propertiesConfig ?????? .setReloadingStrategy(new FileChangedReloadingStrategy()); ???? config.addConfiguration(propertiesConfig); ??? } catch (ConfigurationException e) { ???? e.printStackTrace(); ??? } ?? } } private SystemConfiguration() { } public static String getString(String propertyKey) { ?? return config.getString(propertyKey); } public static String getString(String propertyKey,String defaultValue) { ?? return config.getString(propertyKey,defaultValue); } public static int getInt(String propertyKey) { ?? return config.getInt(propertyKey); } public static int getInt(String key,int defaultValue) { ?? return config.getInt(key,defaultValue); } public static float getFloat(String propertyKey) { ?? return config.getFloat(propertyKey); } public static float getFloat(String propertyKey,float defaultValue) { ?? return config.getFloat(propertyKey,defaultValue); } public static boolean getBoolean(String propertyKey) { ?? return config.getBoolean(propertyKey); } public static boolean getBoolean(String propertyKey,boolean defualtValue) { ?? return config.getBoolean(propertyKey,defualtValue); } public static String[] getStringArray(String propertyKey) { ?? return config.getStringArray(propertyKey); } public static List<String> getStringList(String propertyKey) { ?? List<String> list = new ArrayList<String>(); ?? String[] strArr = getStringArray(propertyKey); ?? for (String value : strArr) { ??? list.add(value); ?? } ?? return list; } @SuppressWarnings("unchecked") public static List getList(String propertyKey) { ?? return config.getList(propertyKey); } } 构造jar包的META-INF，在src/main/resouces下新增目录 com.sillycat.easygroovyplugin.handlers 存放文件groovy.xsd <?xml version="1.0" encoding="UTF-8"?> <xsd:schema xmlns="http://www.sillycat.com/schema/groovy" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:beans="http://www.springframework.org/schema/beans" targetNamespace="http://www.sillycat.com/schema/groovy" elementFormDefault="qualified" attributeFormDefault="unqualified"> <xsd:import namespace="http://www.springframework.org/schema/beans" /> <xsd:import namespace="http://www.springframework.org/schema/tool" /> <xsd:annotation> ?? <xsd:documentation><![CDATA[ ??????? Defines utility elements for groovy script convenience operations ??????? ]]></xsd:documentation> </xsd:annotation> <xsd:element name="scan"> ?? <xsd:annotation> ??? <xsd:documentation><![CDATA[ ?????????? Allows for scanning the file system for groovy scripts and defining ?????????? dynamic language beans for them in the application context ??????????? ]]></xsd:documentation> ?? </xsd:annotation> ?? <xsd:complexType> ??? <xsd:attribute name="source-pattern" type="xsd:string" ???? use="required" /> ?? </xsd:complexType> </xsd:element> </xsd:schema> 建立目录META-INF 在里面增加文件spring.handlers，内容如下： http://www.sillycat.com/schema/groovy=com.sillycat.easygroovyplugin.handlers.GroovyNamespaceHandler 增加文件spring.schemas，内容如下： http://www.sillycat.com/schema/groovy/groovy.xsd=com/sillycat/easygroovyplugin/handlers/groovy.xsd 我是使用MAVEN2来管理JAR的，所以用如下pom.xml打包，easygroovyplugin-1.0.jar就OK了。这个就是我们对spring的自定义扩展了。 <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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.sillycat.easygroovyplugin</groupId> <artifactId>easygroovyplugin</artifactId> <name>easygroovyplugin</name> <version>1.0</version> <build> ?? <pluginManagement> ??? <plugins> ???? <plugin> ????? <artifactId>maven-compiler-plugin</artifactId> ????? <configuration> ?????? <source>1.5</source> ?????? <target>1.5</target> ????? </configuration> ???? </plugin> ??? </plugins> ?? </pluginManagement> </build> <dependencies> ?? <dependency> ??? <groupId>commons-configuration</groupId> ??? <artifactId>commons-configuration</artifactId> ??? <version>1.5</version> ?? </dependency> ?? <dependency> ??? <groupId>org.springframework</groupId> ??? <artifactId>spring-beans</artifactId> ??? <version>2.5.6</version> ?? </dependency> ?? <dependency> ??? <groupId>org.springframework</groupId> ??? <artifactId>spring-context</artifactId> ??? <version>2.5.6</version> ?? </dependency> ?? <dependency> ??? <groupId>org.springframework</groupId> ??? <artifactId>spring-webmvc</artifactId> ??? <version>2.5.6</version> ?? </dependency> ?? <dependency> ??? <groupId>org.springframework</groupId> ??? <artifactId>spring-aop</artifactId> ??? <version>2.5.6</version> ?? </dependency> </dependencies> </project> 问题一： 当本地部署的apache不能访问，也就是 http://www.sillycat.com/schema/groovy/groovy.xsd 不能访问的时候，报错如下： Caused by: org.xml.sax.SAXParseException: cvc-complex-type.2.4.c: The matching wildcard is strict,but no declaration can be found for element 'groovy:scan'. at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source) 解决： 修改了easygroovyplugin的jar里面的spring.schemas为不采用META-INF的相对位置，而是从 这个路径（com/sillycat/easygroovyplugin/handlers/groovy.xsd）找，就OK啦。