写出一个你自己的MVC框架-基于对springMVC源码实现和理解（5）：数据初始化(四)

DispatcherServlet中的数据初始化：

重写init():@Override
public void init() throws ServletException {

logger.info("=====================MyDispatcherServlet init=====================");

logger.info("============================加载配置文件:===========================");
loadConfigFile();

logger.info("=============================初始化参数============================");
initParameter();

logger.info("=============================加载控制器============================");
loadController();

logger.info("========================预映射URL和requestMap======================");
mapMethod();

logger.info("=============================加载拦截器============================");
loadInterceptor();

logger.info("=============================初始化完毕============================");

}加载配置文件：
/*
* 加载配置文件
*/
private void loadConfigFile() {
String mvcConfigLocation = getInitParameter("mvcConfigLocation");
logger.info(mvcConfigLocation);
InputStream inputStream = this.getServletContext().getResourceAsStream(
mvcConfigLocation);

p = new Properties();

try {
p.load(inputStream);
} catch (IOException e1) {
e1.printStackTrace();
}
}

初始化部分参数：
/*
* 初始化部分参数
*/
private void initParameter() {
viewPath = p.getProperty("myview.path");
logger.info("映射view目录:" + viewPath);
}加载控制器：
/*
* 加载控制器
*/
private void loadController() {

String controllerPath = p.getProperty("controller.annotated.path");
String filePath = "";
String classPath = this.getClass().getClassLoader().getResource("")
.getPath();

filePath = classPath + controllerPath;
List<String> allClassName = new ArrayList<String>();

MvcUtil.getAllClassName(classPath, filePath, allClassName);

for (String s : allClassName) {
try {

Class<?> c = Class.forName(s);
if (c.isAnnotationPresent(MyController.class)) {
cs.add(c);
logger.info("加载controller:" + c.getName());
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
} 这里用了反射的方式加载被Controller注解的类，用到的工具类中的方法getAllClassName():
public static List<String> getAllClassName(String classPath ,String filePath ,List<String> allClassName) {
File dir = new File(filePath);
File[] fs = dir.listFiles(); //包括子目录

String className = "";

for (File f : fs) {
if (f.isDirectory()) {
getAllClassName(classPath,f.getAbsolutePath(),allClassName);
} else {
className = f.getPath().replace(classPath.substring(1).replace("/", "\\"), "").replace("\\", ".").replace(".class", "");
allClassName.add(className);
}
}
return allClassName;
}映射控制器方法并实例化hs中：
/*
* 映射控制器方法
*/
private void mapMethod() {

Method[] ms = null;
String rm = null;
for (Class<?> c : cs) {
ms = c.getMethods();
String mappingUrl = "";
for (Method m : ms) {
if (m.isAnnotationPresent(MyRequestMapping.class)) {
mappingUrl = this.getServletContext().getContextPath()
+ m.getAnnotation(MyRequestMapping.class).value()
.trim();
rm = m.getAnnotation(MyRequestMapping.class).method()
.trim().toUpperCase();
logger.info("映射url:" + mappingUrl);

try {
hs.put(mappingUrl + rm, new Handler(c.newInstance(), m, rm));// 先直接拼接字符串当key，以后再优化
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
}
}加载拦截器存放在os中：
/*
* 加载控制器
*/
private void loadInterceptor() {
String controllerPath = p.getProperty("interception.path").trim();
String filePath = "";
String classPath = this.getClass().getClassLoader().getResource("")
.getPath();

filePath = classPath + controllerPath;
List<String> allClassName = new ArrayList<String>();

MvcUtil.getAllClassName(classPath, filePath, allClassName);

String[] mappingPath = {};
String interceptorMethod = "";
int index = 0;
for (String s : allClassName) {
try {
Class<?> c = Class.forName(s);
if (c.isAnnotationPresent(MyInterceptor.class)) {
mappingPath = c.getAnnotation(MyInterceptor.class)
.mappingPath();
interceptorMethod = c.getAnnotation(MyInterceptor.class)
.interceptionMethod();
index = c.getAnnotation(MyInterceptor.class).index();

os.add(new Obstruct(
InterceptorFactory.createInterceptor(c),
mappingPath, interceptorMethod, index));
logger.info("加载interceptor:" + c.getName());
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
Collections.sort(os, new ComparatorObstructUtil());
}至此数据初始化过程结束