springmvc模块三作业.zip

package com.tch.edu.mvcframework.servlet; import com.tch.edu.mvcframework.annotations.*; import com.tch.edu.mvcframework.pojo.Handler; import com.tch.edu.mvcframework.annotations.*; import org.apache.commons.lang3.StringUtils; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.Field; import java.lang.reflect.Method; import java.lang.reflect.Parameter; import java.util.*; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * 自定义前段控制器 */ public class MyDispatcherServlet extends HttpServlet { //配置文件信息 private Properties properties = new Properties(); //缓存扫描到的类的全限定类名 private List<String> classNames = new ArrayList<>(); //IOC容器 private Map<String,Object> ioc = new HashMap<String,Object>(); //hanlerMapping //存储URL和method之间映射 //private Map<String,Method> handlerMapping = new HashMap<>(); private List<Handler> handlerMapping = new ArrayList<>(); @Override public void init(ServletConfig config) throws ServletException { //1. 加载配置文件 springmvc.properties String contextConfigLocation = config.getInitParameter("contextConfigLocation"); //解析配置文件 doLoadConfig(contextConfigLocation); //2. 扫描注解 doScan(properties.getProperty("scanPackage")); //3. 初始化Bean doInstance(); //4. 依赖注入 doAutoWired(); //5. 构造一个HandlerMapping处理器映射器，讲配置好的url和method建立映射关系 initHandlerMapping(); System.out.println("MVC 初始化完成...."); } //构造一个HandlerMapping处理器映射器，讲配置好的url和method建立映射关系 /** * 最关键的环节：建立URL映射关系 */ private void initHandlerMapping() { if(ioc.size() == 0) return; for(Map.Entry<String,Object> entry:ioc.entrySet()){ Class<?> aClass = entry.getValue().getClass(); if (!aClass.isAnnotationPresent(MyController.class)){ //非Controller不处理 continue; } String baseUrl = ""; //是mapping映射 //获取Controller上的注解值 if (aClass.isAnnotationPresent(MyRequestMapping.class)){ MyRequestMapping myRequestMapping = aClass.getAnnotation(MyRequestMapping.class); baseUrl = myRequestMapping.value(); } Method[] methods = aClass.getMethods(); for (int i = 0; i < methods.length; i++) { //获取所有方法 Method method = methods[i]; //非MyRequestMapping不处理 if (!method.isAnnotationPresent(MyRequestMapping.class)){continue;} //获取方法上的mpping MyRequestMapping mapping = method.getAnnotation(MyRequestMapping.class); //方法上的注解 String method_anno = mapping.value(); //建立url和方法直接的映射 String url = baseUrl + method_anno; //处理handler对象 Handler handler = new Handler(entry.getValue(),method, Pattern.compile(url)); //获取方法的参数列表 Parameter[] parameters = method.getParameters(); for (int j = 0; j < parameters.length; j++) { Parameter parameter = parameters[j]; //判断是否是HttpServletRequest或者HttpServletResponse if (parameter.getType() == HttpServletRequest.class || parameter.getType() == HttpServletResponse.class){ handler.getParamIndexMapping().put(parameter.getType().getSimpleName(),j); }else { handler.getParamIndexMapping().put(parameter.getName(),j); } } //判断方法是否有校验 if (method.isAnnotationPresent(MySecurity.class)){ //获取方法的权限 MySecurity mySecurity = method.getAnnotation(MySecurity.class); //获取方法上的校验值 String[] value = mySecurity.value(); List<String> listvalue = Arrays.asList(value); List arrList = new ArrayList(listvalue); //获取类上的校验值 if (aClass.isAnnotationPresent(MySecurity.class)){ MySecurity mySecurityMethod = aClass.getAnnotation(MySecurity.class); String[] classMySecurity = mySecurityMethod.value(); for (String s : classMySecurity) { if(!arrList.contains(s)){ try { //添加到校验集合 arrList.add(s); }catch (Exception e){ e.getStackTrace(); } } } } //村粗 handler.setSecurity(arrList); } //存入映射容器 handlerMapping.add(handler); } } } //依赖注入 private void doAutoWired() { //无对象 if(ioc.size() == 0) return; //遍历容器的对象 for(Map.Entry<String,Object> entry:ioc.entrySet()){ //获取所有字段信息 Field[] declaredFields = entry.getValue().getClass().getDeclaredFields(); for (int i = 0; i < declaredFields.length; i++) { Field declaredField = declaredFields[i]; //判断是否有Autowired if (!declaredField.isAnnotationPresent(MyAutowired.class)){ return; } MyAutowired myAutowired = declaredField.getAnnotation(MyAutowired.class); //获取注解的ID String beanName = myAutowired.value(); if("".equals(beanName.trim())){ //没有配置具体的bean id，那就需要根据当前的字段类型注入（接口注入） beanName = declaredField.getType().getName(); } //暴力访问 declaredField.setAccessible(true); try { //注入赋值 declaredField.set(entry.getValue(),ioc.get(beanName)); } catch (IllegalAccessException e) { e.printStackTrace(); } } } } //初始化Bean对象(实现IOC容器)，使用反射技术完成对象的创建和管理 private void doInstance() { if (classNames.size() == 0) return; for (int i = 0; i < classNames.size(); i++) { String className = classNames.get(i); try { //反射 Class<?> aClass = Class.forName(className); //区分controller、service if(aClass.isAnnotationPresent(MyController.class)){ //类名 String simpleName = aClass.getSimpleName(); //DemoController String loweFirstSimpleName = loweFirst(si