package com.coderising.litestruts;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.hamcrest.core.SubstringMatcher;
public class Struts {
public static View runAction(String actionName, Map<String,String> parameters) {
View view = new View();
/*
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。
*/
//Dom4J读取struts.xml
//System.out.println(Struts.class.getResource("").getPath());
File file = new File(Struts.class.getResource("").getPath()+"struts.xml");
SAXReader rd = new SAXReader();
try {
Document doc = rd.read(file);
Element root = doc.getRootElement();
Element action;
for (Iterator iterator = root.elementIterator("action"); iterator.hasNext();) {
action = (Element) iterator.next();
//System.out.println(action.attributeValue("name")+"===="+action.attributeValue("class"));
if (null != actionName && actionName.equals(action.attributeValue("name")) ) {
//System.out.println(action.attributeValue("name")+"========"+action.attributeValue("class"));
Class actionclass = Class.forName(action.attributeValue("class"));
Object actionObj = actionclass.newInstance();
Method[] methods = actionclass.getMethods();
for (int i = 0; i < methods.length; i++) {
String methodName = methods[i].getName();
if (methodName.startsWith("set")) {
if (parameters.get(methodName.substring(3).toLowerCase()) != null) {
methods[i].invoke(actionObj, parameters.get(methodName.substring(3).toLowerCase()));
}
}
}
Method meththod = actionclass.getMethod("execute", null);
String result = (String) meththod.invoke(actionObj);
Map resultParameters = new HashMap();
for (int i = 0; i < methods.length; i++) {
String methodName = methods[i].getName();
if (methodName.startsWith("get")) {
resultParameters.put(methodName.substring(3).toLowerCase(), methods[i].invoke(actionObj));
}
}
Element resultElement;
for (Iterator iterator2 = action.elementIterator(); iterator2.hasNext();) {
resultElement = (Element) iterator2.next();
if (resultElement.attributeValue("name").equals(result)) {
view.setJsp(resultElement.getText());
view.setParameters(resultParameters);
}
}
}
}
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchMethodException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InvocationTargetException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return view;
}
public static void main(String[] args) {
Map map = new HashMap();
map.put("name","test");
map.put("password","1234");
View view = runAction("login", map);
System.out.println(view.getJsp());
}
}