litestruts

group26/723161901/src/com/litestruts/LoginAction.java

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+package com.litestruts;
+
+/**
+ * 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;
+    }
+}

group26/723161901/src/com/litestruts/Struts.java

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+package com.litestruts;
+
+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.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.SAXException;
+
+import com.litestruts.strutsBean.Action;
+
+
+
+public class Struts {
+
+
+    public static View runAction(String actionName, Map<String,String> parameters) {
+
+        /*
+         
+		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。
+        
+        */
+    	StrutsXmlReader strutsXml = new StrutsXmlReader(new File("src/com/litestruts/struts.xml"));
+		View view = new View();
+    	try {
+			HashMap actMap = (HashMap) strutsXml.loadXml();
+			Action act = (Action) actMap.get(actionName);
+			Class clazz = Class.forName(act.getClazz());
+			Object obj = clazz.newInstance();
+			HashMap paraMap = act.getParameters();
+			Iterator<Map.Entry<String, String>> iteraPara = parameters.entrySet().iterator();
+
+			while(iteraPara.hasNext()){
+				Entry<String, String> itera = iteraPara.next();
+				Field field = clazz.getDeclaredField(itera.getKey());
+				field.setAccessible(true);
+				field.set(obj, itera.getValue());
+			}
+
+			Method method = clazz.getMethod("execute", null);
+			String results = (String)method.invoke(obj, null);
+			Field[] getFields = clazz.getDeclaredFields();
+			HashMap getMapPara = new HashMap();
+			for (Field field : getFields) {
+				field.setAccessible(true);
+				String getFiledName = field.getName();
+				Object objValue = field.get(obj);
+				getMapPara.put(getFiledName, objValue);
+			}
+
+			view.setParameters(getMapPara);
+			view.setJsp((String)paraMap.get(results));
+
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+
+    	return view;
+    }    
+
+
+}

group26/723161901/src/com/litestruts/StrutsTest.java

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+package com.litestruts;
+
+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>();
+
+        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"));
+	}
+}

group26/723161901/src/com/litestruts/StrutsXmlReader.java

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+package com.litestruts;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.parsers.ParserConfigurationException;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NamedNodeMap;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
+import org.xml.sax.SAXException;
+
+import com.litestruts.strutsBean.Action;
+
+public class StrutsXmlReader {
+	private File file;
+	private HashMap actMap = new HashMap();
+
+	public StrutsXmlReader(File file) {
+		super();
+		this.file = file;
+	}
+
+
+	public Map loadXml() throws ParserConfigurationException, SAXException, IOException {
+		DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
+		DocumentBuilder builder = factory.newDocumentBuilder();
+		Document doc = builder.parse(file);
+		NodeList nl = doc.getElementsByTagName("action");
+		for (int i = 0; i < nl.getLength(); i++) {
+			Element book = (Element) nl.item(i);
+			String name = book.getAttribute("name");
+			String claz = book.getAttribute("class");
+			Action act = new Action(name, claz);
+			System.out.println(name);
+			System.out.println(claz);
+			NodeList bookNode = book.getChildNodes();
+			HashMap<String, String> paraMap = new HashMap();
+			for (int j = 0; j < bookNode.getLength(); j++) {
+				Node bookCh = bookNode.item(j);
+				if (bookCh.getNodeType() == Node.ELEMENT_NODE) {
+					String valTag = bookCh.getTextContent();
+					NamedNodeMap attrs = bookCh.getAttributes();
+					String resultsValue = attrs.getNamedItem("name").getNodeValue();
+					paraMap.put(resultsValue, valTag);
+				}
+				act.setParameters(paraMap);
+			}
+			actMap.put(act.getName(), act);
+		}
+		return actMap;
+	}
+}

group26/723161901/src/com/litestruts/View.java

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+package com.litestruts;
+
+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;
+	}
+}

group26/723161901/src/com/litestruts/struts.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<struts>
+    <action name="login" class="com.litestruts.LoginAction">
+        <result name="success">/jsp/homepage.jsp</result>
+        <result name="fail">/jsp/showLogin.jsp</result>
+    </action>
+    <action name="logout" class="com.litestruts.LogoutAction">
+    	<result name="success">/jsp/welcome.jsp</result>
+    	<result name="error">/jsp/error.jsp</result>
+    </action>
+</struts>

group26/723161901/src/com/litestruts/strutsBean/Action.java

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+package com.litestruts.strutsBean;
+
+import java.util.HashMap;
+
+public class Action {
+	private String name;
+	private String clazz;
+	private HashMap<String, String> parameters;
+
+	public Action() {
+		super();
+	}
+
+	public Action(String name, String clazz) {
+		super();
+		this.name = name;
+		this.clazz = clazz;
+	}
+
+	public Action(String name, String clazz, HashMap<String, String> parameters) {
+		super();
+		this.name = name;
+		this.clazz = clazz;
+		this.parameters = parameters;
+	}
+	public String getName() {
+		return name;
+	}
+	public void setName(String name) {
+		this.name = name;
+	}
+	public String getClazz() {
+		return clazz;
+	}
+	public void setClazz(String clazz) {
+		this.clazz = clazz;
+	}
+	public HashMap<String, String> getParameters() {
+		return parameters;
+	}
+	public void setParameters(HashMap<String, String> parameters) {
+		this.parameters = parameters;
+	}
+
+
+}