一个Struts2结合Spring测试的方法

公告

最近在学习Struts2，进行测试驱动开发，对于struts2与Spring集成的测试，Struts2给出了一个插件struts2-junit-plugin-2.1.8.1.jar，这个插件需要spring-test.jar包的支持，所有需要测试的Action类都继承StrutsSpringTestCase。这个测试要求只能用个application.xml文件，而且必须放到类路径根目录下面。在我们开发中往往编写许多以application开头的部署文件，一般也不在类路径下面存放，例如我一般习惯在WEB-INF目录下建立一个config文件夹，将spring的部署文件都放到config文件夹下面。但是用StrutsSpringTestCase类不能解决改问题，我查看了一下StrutsSpringTestCase的原代码，代码如下：

Java代码

public abstract class StrutsSpringTestCase extends StrutsTestCase {
private static final String DEFAULT_CONTEXT_LOCATION = "classpath*:applicationContext.xml";
protected static ApplicationContext applicationContext;
protected void setupBeforeInitDispatcher() throws Exception {
//init context
GenericXmlContextLoader xmlContextLoader = new GenericXmlContextLoader();
applicationContext = xmlContextLoader.loadContext(getContextLocations());
servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, applicationContext);
}
protected String getContextLocations() {
return DEFAULT_CONTEXT_LOCATION;
}
}

public abstract class StrutsSpringTestCase extends StrutsTestCase {
    private static final String DEFAULT_CONTEXT_LOCATION = "classpath*:applicationContext.xml";
    protected static ApplicationContext applicationContext;


    protected void setupBeforeInitDispatcher() throws Exception {
        //init context
        GenericXmlContextLoader xmlContextLoader = new GenericXmlContextLoader();
        applicationContext = xmlContextLoader.loadContext(getContextLocations());
        servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, applicationContext);
    }

    protected String getContextLocations() {
        return DEFAULT_CONTEXT_LOCATION;
    }
}

我们只要写一个继承类，重载setupBeforeInitDispatcher()方法就可以解决改问题了，如果我们有两个配置文件applicationContext.xml、applicationContext-other.xml,我们就可以这样写：

Java代码

@Override
protected void setupBeforeInitDispatcher() throws Exception {
GenericXmlContextLoader xmlContextLoader = new GenericXmlContextLoader();
applicationContext = xmlContextLoader.loadContext(new String[]{"applicationContext.xml,","applicationContext-other.xml,"});
servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, applicationContext);
}

   @Override
    protected void setupBeforeInitDispatcher() throws Exception {
        GenericXmlContextLoader xmlContextLoader = new GenericXmlContextLoader();
        applicationContext = xmlContextLoader.loadContext(new String[]{"applicationContext.xml,","applicationContext-other.xml,"});
        servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, applicationContext);
    }

这样我们就解决了多个配置文件的问题，但是还有一个，我们一开始也不能确定有几个配置文件，这个方法还是不通用，需要再次重构，这样，我决定写一个方法，从config文件下读取文件，所有以application开通的文件组成一个字符串数组，这样就不需要修改改类了。代码如下：

Java代码

public class SpringBeanFactoryMock extends StrutsSpringTestCase {
@Override
public void setUp() throws Exception {
super.setUp();
}
@Override
protected void setupBeforeInitDispatcher() throws Exception {
GenericXmlContextLoader xmlContextLoader = new GenericXmlContextLoader();
applicationContext = xmlContextLoader.loadContext(getContextLocation());
servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, applicationContext);
}
public String[] getContextLocation(){
URL classUrl = SpringBeanFactoryMock.class.getResource("");
String path = classUrl.getPath();
try {
path = URLDecoder.decode(path, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
path = path.substring(1 , path.indexOf("WEB-INF"))+ "WEB-INF/";
File configPath = new File(path);
String[] applicationContexts = configPath.list(new FilenameFilter(){
public boolean accept(File dir, String name){
if(name.toLowerCase().startsWith("applicationcontext")){
return true;
}
return false;
}
});
for(int i=0;i<applicationContexts.length;i++){
applicationContexts[i] = "file:"+path + applicationContexts[i];
}
return applicationContexts;
}
}

public class SpringBeanFactoryMock extends StrutsSpringTestCase {
	@Override
	public void setUp() throws Exception {
		super.setUp();
	}
	@Override
    protected void setupBeforeInitDispatcher() throws Exception {
        GenericXmlContextLoader xmlContextLoader = new GenericXmlContextLoader();
        applicationContext = xmlContextLoader.loadContext(getContextLocation());
        servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, applicationContext);
    }
	public String[] getContextLocation(){
		URL classUrl = SpringBeanFactoryMock.class.getResource("");
		String path = classUrl.getPath();
		try {
			path = URLDecoder.decode(path, "UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
		path =  path.substring(1 , path.indexOf("WEB-INF"))+ "WEB-INF/";
		File configPath = new File(path);
		String[] applicationContexts = configPath.list(new FilenameFilter(){
			public boolean accept(File dir, String name){
				if(name.toLowerCase().startsWith("applicationcontext")){
					return true;
				}
				return false;
			}				
		});			
		for(int i=0;i<applicationContexts.length;i++){
			applicationContexts[i] = "file:"+path +  applicationContexts[i];
		}
		return applicationContexts;
	}
}

以后我们测试Struts2的Action类时候，只要继承SpringBeanFactoryMock类就可以了。

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