springMVC源码分析--ControllerClassNameHandlerMapping（九）

在上一篇博客springMVC源码分析--AbstractControllerUrlHandlerMapping（六）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。

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;
}
}