springMVC源码分析--ControllerClassNameHandlerMapping（九）

矫情吗；* 2022-07-13 02:11 157阅读 0赞

在上一篇博客[springMVC源码分析--AbstractControllerUrlHandlerMapping（六）][springMVC_--AbstractControllerUrlHandlerMapping]中我们介绍到AbstractControllerUrlHandlerMapping定义了抽象方法buildUrlsForHandler，接下来我们看看在其子类ControllerClassNameHandlerMapping中的实现。

![Image 1][]

ControllerClassNameHandlerMapping中buildUrlsForHandler实现如下，根据beanClass来获取url

@Override
    	protected String[] buildUrlsForHandler(String beanName, Class<?> beanClass) {
    		return generatePathMappings(beanClass);
    	}
    	protected String[] generatePathMappings(Class<?> beanClass) {
    		StringBuilder pathMapping = buildPathPrefix(beanClass);
    		String className = ClassUtils.getShortName(beanClass);
    		String path = (className.endsWith(CONTROLLER_SUFFIX) ?
    				className.substring(0, className.lastIndexOf(CONTROLLER_SUFFIX)) : className);
    		if (path.length() > 0) {
    			if (this.caseSensitive) {
    				pathMapping.append(path.substring(0, 1).toLowerCase()).append(path.substring(1));
    			}
    			else {
    				pathMapping.append(path.toLowerCase());
    			}
    		}
    		if (isMultiActionControllerType(beanClass)) {
    			return new String[] {pathMapping.toString(), pathMapping.toString() + "/*"};
    		}
    		else {
    			return new String[] {pathMapping.toString() + "*"};
    		}
    	}
    	private StringBuilder buildPathPrefix(Class<?> beanClass) {
    		StringBuilder pathMapping = new StringBuilder();
    		if (this.pathPrefix != null) {
    			pathMapping.append(this.pathPrefix);
    			pathMapping.append("/");
    		}
    		else {
    			pathMapping.append("/");
    		}
    		if (this.basePackage != null) {
    			String packageName = ClassUtils.getPackageName(beanClass);
    			if (packageName.startsWith(this.basePackage)) {
    				String subPackage = packageName.substring(this.basePackage.length()).replace('.', '/');
    				pathMapping.append(this.caseSensitive ? subPackage : subPackage.toLowerCase());
    				pathMapping.append("/");
    			}
    		}
    		return pathMapping;
    	}

完整的ControllerClassNameHandlerMapping的源码实现如下：

public class ControllerClassNameHandlerMapping extends AbstractControllerUrlHandlerMapping {
    
    	private static final String CONTROLLER_SUFFIX = "Controller";
    	private boolean caseSensitive = false;
    	private String pathPrefix;
    	private String basePackage;
    	public void setCaseSensitive(boolean caseSensitive) {
    		this.caseSensitive = caseSensitive;
    	}
    	public void setPathPrefix(String prefixPath) {
    		this.pathPrefix = prefixPath;
    		if (StringUtils.hasLength(this.pathPrefix)) {
    			if (!this.pathPrefix.startsWith("/")) {
    				this.pathPrefix = "/" + this.pathPrefix;
    			}
    			if (this.pathPrefix.endsWith("/")) {
    				this.pathPrefix = this.pathPrefix.substring(0, this.pathPrefix.length() - 1);
    			}
    		}
    	}
    	public void setBasePackage(String basePackage) {
    		this.basePackage = basePackage;
    		if (StringUtils.hasLength(this.basePackage) && !this.basePackage.endsWith(".")) {
    			this.basePackage = this.basePackage + ".";
    		}
    	}
    	@Override
    	protected String[] buildUrlsForHandler(String beanName, Class<?> beanClass) {
    		return generatePathMappings(beanClass);
    	}
    	protected String[] generatePathMappings(Class<?> beanClass) {
    		StringBuilder pathMapping = buildPathPrefix(beanClass);
    		String className = ClassUtils.getShortName(beanClass);
    		String path = (className.endsWith(CONTROLLER_SUFFIX) ?
    				className.substring(0, className.lastIndexOf(CONTROLLER_SUFFIX)) : className);
    		if (path.length() > 0) {
    			if (this.caseSensitive) {
    				pathMapping.append(path.substring(0, 1).toLowerCase()).append(path.substring(1));
    			}
    			else {
    				pathMapping.append(path.toLowerCase());
    			}
    		}
    		if (isMultiActionControllerType(beanClass)) {
    			return new String[] {pathMapping.toString(), pathMapping.toString() + "/*"};
    		}
    		else {
    			return new String[] {pathMapping.toString() + "*"};
    		}
    	}
     private StringBuilder buildPathPrefix(Class<?> beanClass) {
    		StringBuilder pathMapping = new StringBuilder();
    		if (this.pathPrefix != null) {
    			pathMapping.append(this.pathPrefix);
    			pathMapping.append("/");
    		}
    		else {
    			pathMapping.append("/");
    		}
    		if (this.basePackage != null) {
    			String packageName = ClassUtils.getPackageName(beanClass);
    			if (packageName.startsWith(this.basePackage)) {
    				String subPackage = packageName.substring(this.basePackage.length()).replace('.', '/');
    				pathMapping.append(this.caseSensitive ? subPackage : subPackage.toLowerCase());
    				pathMapping.append("/");
    			}
    		}
    		return pathMapping;
    	}
    }

[springMVC_--AbstractControllerUrlHandlerMapping]: http://blog.csdn.net/qq924862077/article/details/53760945
[Image 1]: