Merge pull request #1 from CoderXLoong/master

第二次作业提交 CoderXLoong 2017-3-4

group13/413007522/lesson02/pom.xml

@@ -0,0 +1,18 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>cn.xl</groupId>
+  <artifactId>lesson_code</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <name>lesson_code</name>
+
+  <dependencies>
+
+      <dependency>  
+            <groupId>junit</groupId>  
+            <artifactId>junit</artifactId>  
+            <version>4.8.2</version>  
+            <scope>test</scope>  
+        </dependency>  
+  </dependencies>
+
+</project>

group13/413007522/lesson02/src/main/java/cn/xl/c2/LoginAction.java

@@ -0,0 +1,46 @@
+package cn.xl.c2;
+
+/**
+ * 这是一个用来展示登录的业务类， 其中的用户名和密码都是硬编码的。
+ * @author liuxin
+ *
+ */
+public class LoginAction{
+    private String name ;
+    private String password;
+    private String message;
+
+    public String getName() {
+        return name;
+    }
+
+
+
+    public String getPassword() {
+        return password;
+    }
+
+    public String execute(){
+            if("test".equals(name) && "1234".equals(password)){
+                this.message = "login successful";
+                return "success";
+            }
+            this.message = "login failed,please check your user/pwd";
+            return "fail";
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+    public void setPassword(String password){
+        this.password = password;
+    }
+    public String getMessage(){
+        return this.message;
+    }
+
+    public static void main(String[] args){
+
+
+    }
+}

group13/413007522/lesson02/src/main/java/cn/xl/c2/Struts.java

@@ -0,0 +1,169 @@
+package cn.xl.c2;
+
+import java.io.File;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+
+/**
+ * 0. 读取配置文件struts.xml
+ * 1. 根据actionName找到相对应的class ， 例如LoginAction, 通过反射实例化（创建对象）据parameters中的数据，调用对象的setter方法， 
+ *    例如parameters中的数据是 ("name"="test" ,  "password"="1234") , 那就应该调用 setName和setPassword方法
+ * 2. 通过反射调用对象的exectue 方法， 并获得返回值，例如"success"
+ * 3. 通过反射找到对象的所有getter方法（例如 getMessage）,  
+ *    通过反射来调用， 把值和属性形成一个HashMap , 例如 {"message":  "登录成功"} ,  放到View对象的parameters
+ * 4. 根据struts.xml中的 <result> 配置,以及execute的返回值，  确定哪一个jsp，  
+ * 	     放到View对象的jsp字段中。
+ * 
+ */
+
+public class Struts {
+
+
+	private static  String filePath = "src/main/java/cn/xl/c2/struts.xml";
+
+	private static  long time; 
+
+	private static  List<Object> reList = new ArrayList<Object>(); 
+
+
+	@SuppressWarnings("unchecked")
+	public static View runAction(String actionName, Map<String,String> parameters) {
+
+		View    view = null;
+		Class<?> cls = null;
+		Object   Obj = null;
+		Map<String,Object> action = null;
+		List<Object>   resultList = null;
+		Iterator<Object> restIter = null;
+		List<Object> configlist = getConfigInfo();
+		Iterator<Object> lter = configlist.iterator();
+		while(lter.hasNext()){
+			action = (Map<String,Object>)lter.next();
+			if(actionName.equals(action.get("actionName"))){
+				System.out.println("action.get(actionClass)"+action.get("actionClass"));
+				try {
+					//得到对象
+					cls = Class.forName(action.get("actionClass").toString());
+					Obj = cls.newInstance();
+					//获取到方法对象
+					Method setName = cls.getDeclaredMethod("setName", String.class);
+					Method setPassword = cls.getDeclaredMethod("setPassword", String.class);
+					Method exectue = cls.getDeclaredMethod("execute");
+					//执行方法
+					setName.invoke(Obj,parameters.get("name").toString());
+					setPassword.invoke(Obj,parameters.get("password").toString());
+					String reMessage = (String)exectue.invoke(Obj);
+					//匹配结果，封装view
+					resultList =  (List<Object>) action.get("result");
+					restIter = resultList.iterator();
+					while(restIter.hasNext()){
+						Map<String,Object> result = (Map<String,Object>) restIter.next();
+						if(reMessage.equals(result.get("resultName"))){
+							view = new View();
+							view.setJsp(result.get("resultMapper").toString());
+							view.setParameters(parameters);
+						}
+					}
+
+				} catch (Exception e) {
+					// TODO: handle exception
+					System.out.println("e=="+e);
+				}  
+
+			}
+		}
+
+		return view;
+	}    
+
+	/** 
+	 * 如果内存中没有，则先去解析，如果存在并且配置文件未修改，则直接从内存中获取  
+	 * @return configInfo
+	 */  
+	public static List<Object> getConfigInfo(){  
+		if(reList.size()==0 || getTime(filePath)!=time){  
+			return readConfigXML();  
+		}else {  
+			return  reList;
+		}  
+	}  
+
+	/**
+	 * 读取配置文件信息，并返回配置文件内容
+	 * 
+	 */
+	private static List<Object> readConfigXML() {
+		DocumentBuilderFactory   dbf = DocumentBuilderFactory.newInstance();
+		try {
+			DocumentBuilder db = dbf.newDocumentBuilder();  
+			Document doc = db.parse(filePath);  
+			time = getTime(filePath);
+			NodeList actionList = doc.getElementsByTagName("action"); 
+			Map<String,Object>  actionMap ;
+
+			for (int i = 0; i < actionList.getLength(); i++)  
+			{  
+				actionMap =  new HashMap<String,Object>();
+				Node action = actionList.item(i);  
+				Element elem = (Element) action; 
+				String actionName = elem.getAttributes().getNamedItem("name").getNodeValue();
+				String actionClass = elem.getAttributes().getNamedItem("class").getNodeValue();
+				actionMap.put("actionName",actionName);
+				actionMap.put("actionClass",actionClass);
+				// 获得根元素下的子节点
+				List<Object> resultList = new ArrayList<Object>();
+				for (Node node = action.getFirstChild(); node != null; node = node.getNextSibling())  
+				{  
+					if (node.getNodeType() == Node.ELEMENT_NODE)  
+					{  
+						Map<String,Object> resultMap = new HashMap<String,Object>();
+						String resultName = node.getAttributes().getNamedItem("name").getNodeValue();
+						String resultMapper = node.getFirstChild().getNodeValue();
+						resultMap.put("resultName", resultName);
+						resultMap.put("resultMapper", resultMapper);
+						resultList.add(resultMap);
+					}  
+
+				}
+				actionMap.put("result",resultList);
+				reList.add(actionMap);
+			}
+
+		} catch (Exception e) {
+			// TODO: handle exception
+			System.out.println("e=="+e.getMessage());
+		}
+		return reList;  	
+	}
+
+	/** 
+	 * 获取到文件最后修改时间 
+	 * @return 
+	 */  
+	public static long getTime(String path){  
+		File f = new File(path);    
+		long  lastTime=f.lastModified();  
+		System.out.println("lastTime:::::"+lastTime);
+		return lastTime;  
+	}  
+
+
+	public static void main(String[] args){
+
+
+	}
+
+
+}

group13/413007522/lesson02/src/main/java/cn/xl/c2/StrutsTest.java

@@ -0,0 +1,42 @@
+package cn.xl.c2;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+
+
+
+
+public class StrutsTest {
+
+	@Test
+	public void testLoginActionSuccess() {
+
+		String actionName = "login";
+
+		Map<String,String> params = new HashMap<String,String>();
+        params.put("name","test");
+        params.put("password","1234");
+
+
+        View view  = Struts.runAction(actionName,params);        
+
+        Assert.assertEquals("/jsp/homepage.jsp", view.getJsp());
+        Assert.assertEquals("login successful", view.getParameters().get("message"));
+	}
+
+	@Test
+	public void testLoginActionFailed() {
+		String actionName = "login";
+		Map<String,String> params = new HashMap<String,String>();
+        params.put("name","test");
+        params.put("password","123456"); 
+
+        View view  = Struts.runAction(actionName,params);        
+
+        Assert.assertEquals("/jsp/showLogin.jsp", view.getJsp());
+        Assert.assertEquals("login failed,please check your user/pwd", view.getParameters().get("message"));
+	}
+}

group13/413007522/lesson02/src/main/java/cn/xl/c2/View.java

@@ -0,0 +1,23 @@
+package cn.xl.c2;
+
+import java.util.Map;
+
+public class View {
+	private String jsp;
+	private Map parameters;
+
+	public String getJsp() {
+		return jsp;
+	}
+	public View setJsp(String jsp) {
+		this.jsp = jsp;
+		return this;
+	}
+	public Map getParameters() {
+		return parameters;
+	}
+	public View setParameters(Map parameters) {
+		this.parameters = parameters;
+		return this;
+	}
+}

group13/413007522/lesson02/src/main/java/cn/xl/c2/struts.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<struts>
+    <action name="login" class="cn.xl.c2.LoginAction">
+        <result name="success">/jsp/homepage.jsp</result>
+        <result name="fail">/jsp/showLogin.jsp</result>
+    </action>
+    <action name="logout" class="cn.xl.c2.LogoutAction">
+    	<result name="success">/jsp/welcome.jsp</result>
+    	<result name="error">/jsp/error.jsp</result>
+    </action>
+</struts>