更新项目

pom.xml

@@ -16,9 +16,67 @@
     <dependencies>
         <dependency>
             <groupId>javax.servlet</groupId>
-            <artifactId>servlet-api</artifactId>
+            <artifactId>javax.servlet-api</artifactId>
-            <version>2.3</version>
+            <version>4.0.1</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>dom4j</groupId>
+            <artifactId>dom4j</artifactId>
+            <version>1.6.1</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>3.5</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.sun.xml.bind</groupId>
+            <artifactId>jaxb-impl</artifactId>
+            <version>2.3.1</version>
+        </dependency>
+        <dependency>
+            <groupId>com.sun.xml.messaging.saaj</groupId>
+            <artifactId>saaj-impl</artifactId>
+            <version>1.5.1</version>
+        </dependency>
     </dependencies>
+    <build>
+        <finalName>SpringMvc</finalName>
+        <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+            <plugins>
+                <plugin>
+                    <artifactId>maven-clean-plugin</artifactId>
+                    <version>3.1.0</version>
+                </plugin>
+                <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
+                <plugin>
+                    <artifactId>maven-resources-plugin</artifactId>
+                    <version>3.3.0</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>3.10.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-surefire-plugin</artifactId>
+                    <version>2.22.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-war-plugin</artifactId>
+                    <version>3.4.0</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-install-plugin</artifactId>
+                    <version>3.0.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-deploy-plugin</artifactId>
+                    <version>3.0.0</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
 </project>

src/main/java/com/enjoy/wtd/annotation/WtdAutowiredAnnotation.java

@@ -1,4 +1,4 @@
-package com.wtd.annotation;
+package com.enjoy.wtd.annotation;
 
 import java.lang.annotation.*;
 

src/main/java/com/enjoy/wtd/annotation/WtdControllerAnnotation.java

@@ -1,4 +1,4 @@
-package com.wtd.annotation;
+package com.enjoy.wtd.annotation;
 
 import java.lang.annotation.*;
 

src/main/java/com/enjoy/wtd/annotation/WtdRequestMappingAnnotation.java

@@ -1,4 +1,4 @@
-package com.wtd.annotation;
+package com.enjoy.wtd.annotation;
 
 import java.lang.annotation.*;
 

src/main/java/com/enjoy/wtd/annotation/WtdRequestParamAnnotation.java

@@ -1,4 +1,4 @@
-package com.wtd.annotation;
+package com.enjoy.wtd.annotation;
 
 import java.lang.annotation.*;
 

src/main/java/com/enjoy/wtd/annotation/WtdServiceAnnotation.java

@@ -1,4 +1,4 @@
-package com.wtd.annotation;
+package com.enjoy.wtd.annotation;
 
 import java.lang.annotation.*;
 

src/main/java/com/enjoy/wtd/controller/WtdController.java

@@ -1,10 +1,10 @@
-package com.wtd.controller;
+package com.enjoy.wtd.controller;
 
-import com.wtd.annotation.WtdAutowiredAnnotation;
+import com.enjoy.wtd.annotation.WtdControllerAnnotation;
-import com.wtd.annotation.WtdControllerAnnotation;
+import com.enjoy.wtd.annotation.WtdRequestMappingAnnotation;
-import com.wtd.annotation.WtdRequestMappingAnnotation;
+import com.enjoy.wtd.annotation.WtdRequestParamAnnotation;
-import com.wtd.annotation.WtdRequestParamAnnotation;
+import com.enjoy.wtd.annotation.WtdAutowiredAnnotation;
-import com.wtd.service.WtdService;
+import com.enjoy.wtd.service.WtdService;
 
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

src/main/java/com/enjoy/wtd/service/WtdService.java

@@ -1,4 +1,4 @@
-package com.wtd.service;
+package com.enjoy.wtd.service;
 
 /**
  * @program: wtd-mvc

src/main/java/com/enjoy/wtd/service/impl/WtdServiceImpl.java

@@ -1,7 +1,7 @@
-package com.wtd.service.impl;
+package com.enjoy.wtd.service.impl;
 
-import com.wtd.annotation.WtdServiceAnnotation;
+import com.enjoy.wtd.annotation.WtdServiceAnnotation;
-import com.wtd.service.WtdService;
+import com.enjoy.wtd.service.WtdService;
 
 /**
  * @program: wtd-mvc
@@ -13,6 +13,6 @@ import com.wtd.service.WtdService;
 public class WtdServiceImpl implements WtdService {
     @Override
     public String query(String name, String age) {
-        return "name==="+name+"; age==="+age;
+        return "name="+name+"; age="+age;
     }
 }

src/main/java/com/enjoy/wtd/servlet/DispatcherServlet.java

@@ -0,0 +1,228 @@
+package com.enjoy.wtd.servlet;
+
+import com.enjoy.wtd.annotation.*;
+
+import com.enjoy.wtd.controller.WtdController;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+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.lang.annotation.Annotation;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @program: wtd-mvc
+ * @description:
+ * @author: Mr.Wang
+ * @create: 2023-10-28 17:02
+ **/
+public class DispatcherServlet extends HttpServlet {
+
+    List<String> classNames = new ArrayList<String>();
+
+    Map<String,Object> beans = new HashMap<String,Object>();
+    Map<String,Object> handlerMap = new HashMap<String,Object>();
+
+    private static final long serialVersionUID = 1L;
+
+    public void init(ServletConfig config){
+        //把所有的bean扫描----扫描所有的class文件
+        scanPackage("com.enjoy"); //写到properties
+
+        doInstance(); //根据全类名创建bean
+
+        doIco();//根据bean进行依赖注入
+
+        buildUrlMapping(); // 建立映射关系
+    }
+
+    //com.enjoy
+    private void scanPackage(String basePackage){
+        URL url = this.getClass().getClassLoader().getResource("/"+basePackage.replaceAll("\\.","/"));
+        String fileStr = url.getFile();
+        File file = new File(fileStr);
+
+        String[] filesStr = file.list(); //spc
+
+        for (String path : filesStr) {
+            File filePath = new File(fileStr+path); //com.enjoy.spc...
+
+            if (filePath.isDirectory()){
+                scanPackage(basePackage+"."+path);
+            }else {
+                //加入list
+                classNames.add(basePackage+"."+filePath.getName()); //com.enjoy...xxx.class
+            }
+        }
+    }
+
+    //根据扫描的list全类名，进行实例化
+    private void doInstance(){
+        if (classNames.size() <= 0){
+            System.out.println("报扫描失败.......");
+            return;
+        }
+
+        //list的所有class类，对这些类进行
+        for (String className : classNames) {
+            String cn = className.replace(".class","");
+            try {
+                Class<?> clazz = Class.forName(cn); //com.enjoy.SpcController
+                if (clazz.isAnnotationPresent(WtdControllerAnnotation.class)){
+                    Object instace = clazz.newInstance(); //创建控制类
+
+                    WtdRequestMappingAnnotation requestMapping = clazz.getAnnotation(WtdRequestMappingAnnotation.class);
+                    String rmvalue = requestMapping.value(); //  /spc
+                    beans.put(rmvalue,instace);
+                }else if (clazz.isAnnotationPresent(WtdServiceAnnotation.class)){
+                    WtdServiceAnnotation service = clazz.getAnnotation(WtdServiceAnnotation.class);
+                    Object instance = clazz.newInstance();
+                    beans.put(service.value(),instance);
+                }else {
+                    continue;
+                }
+            } catch (ClassNotFoundException e) {
+                throw new RuntimeException(e);
+            } catch (InstantiationException e) {
+                throw new RuntimeException(e);
+            } catch (IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+        }
+    }
+    //把nacos注入到controller
+    public void doIco(){
+        if (beans.entrySet().size() <= 0){
+            System.out.println("没有一个实例化类");
+        }
+        //把map里所有的实例化遍历出来
+        for (Map.Entry<String,Object> entry : beans.entrySet()){
+            Object instance = entry.getValue();
+            Class<?> clazz = instance.getClass();
+
+            if (clazz.isAnnotationPresent(WtdControllerAnnotation.class)){
+                Field[] fields = clazz.getDeclaredFields();
+                for (Field field : fields) {
+                    if (field.isAnnotationPresent(WtdAutowiredAnnotation.class)){
+                        WtdAutowiredAnnotation auto = field.getAnnotation(WtdAutowiredAnnotation.class);
+                        String key = auto.value(); //spcServiceImpl
+                        field.setAccessible(true);
+                        try {
+                            field.set(instance,beans.get(key));
+                        } catch (IllegalAccessException e) {
+                            throw new RuntimeException(e);
+                        }
+                    }else {
+                        continue;
+                    }
+                }
+            }else{
+                continue;
+            }
+        }
+    }
+
+    private void buildUrlMapping(){
+        if (beans.entrySet().size() <= 0){
+            System.out.println("没有类的实例化......");
+            return;
+        }
+
+        for (Map.Entry<String , Object> entry: beans.entrySet()){
+            Object instance = entry.getValue();
+
+            Class<?> clazz = instance.getClass();
+            if (clazz.isAnnotationPresent(WtdControllerAnnotation.class)){
+                WtdRequestMappingAnnotation requestMapping = clazz.getAnnotation(WtdRequestMappingAnnotation.class);
+                String classPath = requestMapping.value();
+
+                Method[] methods = clazz.getMethods();
+                for (Method method : methods) {
+                    if (method.isAnnotationPresent(WtdRequestMappingAnnotation.class)){
+                        WtdRequestMappingAnnotation methodMapping = method.getAnnotation(WtdRequestMappingAnnotation.class);
+                        String methodPath = methodMapping.value();
+
+                        handlerMap.put(classPath+methodPath, method);
+                    }else {
+                        continue;
+                    }
+                }
+            }else {
+                continue;
+            }
+        }
+    }
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        this.doPost(req,resp);
+    }
+
+    @Override
+    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+        // 获取请求路径 /spc-mvc/spc/query v/spc/query->method
+        String uri = req.getRequestURI();
+        String context = req.getContextPath(); //spc-mvc
+        String path = uri.replace(context, ""); //spc/query
+        Method method = (Method) handlerMap.get(path);
+
+        //根据 key=/spc到map去拿
+        WtdController instance = (WtdController) beans.get("/" + path.split("/")[1]);// /spc
+
+        Object arg[] = hand(req, resp, method);
+        try {
+            method.invoke(instance,arg);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        } catch (InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    private static Object[] hand(HttpServletRequest request,HttpServletResponse response,Method method){
+        //拿到当前待执行的方法有哪些参数
+        Class<?>[] paramClazzs = method.getParameterTypes();
+        //根据参数的个数，new 一个参数的数组，将方法里的所有参数值到args来
+        Object[] args = new Object[paramClazzs.length];
+
+        int args_i = 0;
+        int index = 0;
+        for (Class<?> paramClazz : paramClazzs) {
+            if (ServletRequest.class.isAssignableFrom(paramClazz)){
+                args[args_i++] = request;
+            }
+            if (ServletResponse.class.isAssignableFrom(paramClazz)){
+                args[args_i++] = response;
+            }
+            // 从0-3判断有没有RequestParam注解，很明显paramClazz为0和1时，不是，
+            // 当为2和3时为@RequestParam,需更解析
+            // 当为2和3时为@RequestParam,需更解析
+            java.lang.annotation.Annotation[] paramAns = method.getParameterAnnotations()[index];
+            if (paramAns.length > 0 ){
+                for (Annotation paramAn : paramAns) {
+                    if (WtdRequestParamAnnotation.class.isAssignableFrom(paramAn.getClass())){
+                        WtdRequestParamAnnotation rp =(WtdRequestParamAnnotation) paramAn ;
+                        //找到注解里的name和age
+                        args[args_i++] = request.getParameter(rp.value());
+                    }
+                }
+            }
+            index++;
+        }
+        return args;
+    }
+
+}

src/main/java/com/wtd/servlet/DispatcherServlet.java

@@ -1,198 +0,0 @@
-package com.wtd.servlet;
-
-import com.wtd.annotation.*;
-import com.wtd.controller.WtdController;
-
-import javax.servlet.ServletConfig;
-import javax.servlet.ServletException;
-import javax.servlet.ServletRequest;
-import javax.servlet.ServletResponse;
-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.lang.reflect.Field;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.net.URL;
-import java.text.Annotation;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-/**
- * @program: wtd-mvc
- * @description:
- * @author: Mr.Wang
- * @create: 2023-10-28 17:02
- **/
-public class DispatcherServlet extends HttpServlet {
-
-    List<String> classNames=new ArrayList<>();
-
-    Map<String,Object> beans=new HashMap<String,Object>();
-    Map<String,Object> handlerMap=new HashMap<String,Object>();
-
-
-    public void init(ServletConfig config){
-        scanPackage("com.wtd");//写到properties
-        doInstance();//根据全类名创建bean
-        doIoc();//根据bean进行依赖注入
-        buildUrlMapping();
-    }
-
-    public void scanPackage(String basePackage){
-        URL url=this.getClass().getClassLoader().getResource("/"+basePackage.replaceAll("\\.","/"));
-        String fileStr=url.getFile();
-        File file=new File(fileStr);
-
-        String[] filesStr = file.list();
-
-        for (String path : filesStr) {
-            File filePath=new File(fileStr+path);
-            if(filePath.isDirectory()){
-                scanPackage(basePackage+"."+path);
-            }else{
-                classNames.add(basePackage+"."+filePath.getName());
-            }
-        }
-    }
-    //根据扫描出来的全类名 进行实例化
-    private void doInstance(){
-        if(classNames.size()<0){
-            System.out.println("扫描失败");
-            return;
-        }
-        //遍历list里面所有的class类
-        for (String className : classNames) {
-            String cn = className.replace(".class", "");
-            try {
-                Class<?> clazz = Class.forName(cn);
-                if(clazz.isAnnotationPresent(WtdControllerAnnotation.class)){
-                    Object instance = clazz.newInstance();
-                    WtdRequestMappingAnnotation requestMappingAnnotation = clazz.getAnnotation(WtdRequestMappingAnnotation.class);
-                    String rmValue=requestMappingAnnotation.value();
-                    beans.put(rmValue,instance);
-                }else if(clazz.isAnnotationPresent(WtdServiceAnnotation.class)){
-                    WtdServiceAnnotation service=clazz.getAnnotation(WtdServiceAnnotation.class);
-                    Object instance=clazz.newInstance();
-                    beans.put(service.value(),instance);
-                }else {
-                    continue;
-                }
-            } catch (ClassNotFoundException e) {
-                e.printStackTrace();
-            }catch (InstantiationException e) {
-                e.printStackTrace();
-            } catch (IllegalAccessException e) {
-                e.printStackTrace();
-            }
-        }
-    }
-    //把service注入到controller
-    public void doIoc(){
-        if(!(beans.entrySet().size() > 0)){
-            System.out.println("没有一个实例类");
-        }
-        for (Map.Entry<String,Object> entry:beans.entrySet()){
-            Object instance=entry.getValue();
-            Class<?> clazz = instance.getClass();
-            if(clazz.isAnnotationPresent(WtdControllerAnnotation.class)){
-                Field[] fields = clazz.getDeclaredFields();
-                for (Field field : fields) {
-                    if(field.isAnnotationPresent(WtdAutowiredAnnotation.class)){
-                        WtdAutowiredAnnotation auto=field.getAnnotation(WtdAutowiredAnnotation.class);
-                        String key=auto.value();
-                        field.setAccessible(true);
-                        try {
-                            field.set(instance,beans.get(key));
-                        } catch (IllegalAccessException e) {
-                            e.printStackTrace();
-                        }
-                    }else {
-                        continue;
-                    }
-                }
-            }else {
-                continue;
-            }
-
-
-        }
-    }
-    private void buildUrlMapping(){
-        if(!(beans.entrySet().size() > 0)){
-            System.out.println("没有类的实例化");
-            return;
-        }
-        for (Map.Entry<String,Object> entry:beans.entrySet()){
-            Object instance=entry.getValue();
-            Class<?> clazz=instance.getClass();
-            if(clazz.isAnnotationPresent(WtdControllerAnnotation.class)){
-                WtdRequestMappingAnnotation requestMappingAnnotation=clazz.getAnnotation(WtdRequestMappingAnnotation.class);
-                String classPath = requestMappingAnnotation.value();
-                Method[] methods = clazz.getMethods();
-                for (Method method : methods) {
-                    if(method.isAnnotationPresent(WtdRequestMappingAnnotation.class)){
-                        WtdRequestMappingAnnotation methodMapping=method.getAnnotation(WtdRequestMappingAnnotation.class);
-                        String methodPath=methodMapping.value();
-                        handlerMap.put(classPath+methodPath,method);
-                    }else {
-                        continue;
-                    }
-                }
-            }else {
-                continue;
-            }
-        }
-    }
-    @Override
-    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-        this.doPost(req,resp);
-    }
-
-    @Override
-    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-        String uri=req.getRequestURI();
-        String context=req.getContextPath();
-        String path=uri.replace(context,"");
-        Method method=(Method) handlerMap.get(path);
-        //根据key=/wtd到map去拿
-        WtdController instance=(WtdController) beans.get("/"+path.split("/")[1]);
-        Object arg[]=hand(req,resp,method);
-        try {
-            method.invoke(instance,arg);
-        } catch (IllegalAccessException e) {
-            e.printStackTrace();
-        } catch (InvocationTargetException e) {
-            e.printStackTrace();
-        }
-    }
-    private static Object[] hand(HttpServletRequest request,HttpServletResponse response,Method method){
-        Class<?>[] paramClazzs = method.getParameterTypes();
-        Object[] args=new Object[paramClazzs.length];
-        int args_i=0;
-        int index=0;
-        for (Class<?> paramClazz : paramClazzs) {
-            if(ServletRequest.class.isAssignableFrom(paramClazz)){
-                args[args_i++]=request;
-            }
-            if(ServletResponse.class.isAssignableFrom(paramClazz)){
-                args[args_i++]=response;
-            }
-            Annotation[] paramAns= (Annotation[]) method.getParameterAnnotations()[index];
-            if(paramAns.length>0){
-                for (Annotation paramAn : paramAns) {
-                    if(WtdRequestParamAnnotation.class.isAssignableFrom(paramAn.getClass())){
-                        WtdRequestParamAnnotation rp=(WtdRequestParamAnnotation) paramAn;
-                        args[args_i++]=request.getParameter(rp.value());
-                    }
-                }
-            }
-            index++;
-        }
-        return args;
-    }
-}

src/main/webapp/WEB-INF/web.xml

@@ -6,7 +6,7 @@
     <display-name>wtd-mvc</display-name>
     <servlet>
         <servlet-name>DispatcherServlet</servlet-name>
-        <servlet-class>com.wtd.servlet.DispatcherServlet</servlet-class>
+        <servlet-class>com.enjoy.wtd.servlet.DispatcherServlet</servlet-class>
         <load-on-startup>0</load-on-startup>
     </servlet>
     <servlet-mapping>