package com.coderising.litestruts;
import java.lang.reflect.InvocationTargetException;
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 org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
@SuppressWarnings("unchecked")
public class Struts {
private static List<Element> list = new ArrayList<Element>();
static{
SAXReader read = new SAXReader();
Document doc = null;
try {
doc = read.read(Struts.class.getResourceAsStream("struts.xml"));
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Element root = doc.getRootElement();
list = root.elements();
}
public static View runAction(String actionName, Map<String,String> parameters){
String className = "";
Map<String,String> viewName = new HashMap<String,String>();
Element element = null;
View view = new View();
for(Element e : list){
if(e.attributeValue("name").equals(actionName)){
className = e.attribute("class").getText();
element = e;
}
}
Iterator<Element> e = element.elementIterator();
while(e.hasNext()){
Element result = e.next();
if(result.getName().equals("result"));
viewName.put(result.attributeValue("name"), result.getStringValue());
}
Class clazz = null;
try {
clazz = Class.forName(className);
Object obj = clazz.newInstance();
Iterator<String> keys = parameters.keySet().iterator();
while(keys.hasNext()){
String key = keys.next();
String methodName = "set"+key.substring(0,1).toUpperCase()+key.substring(1).toLowerCase();
Method method =obj.getClass().getMethod(methodName, String.class);
method.invoke(obj, parameters.get(key));
}
Method execute = obj.getClass().getDeclaredMethod("execute");
String result = (String)execute.invoke(obj);
Map<String,Object> map = new HashMap<String,Object>();
Method[] methods = obj.getClass().getDeclaredMethods();
for(Method method : methods){
String methodName = method.getName();
if(methodName.startsWith("get")){
map.put(methodName.substring(3,4).toLowerCase()+methodName.substring(4), method.invoke(obj));
String s = (String)method.invoke(obj);
System.out.println(methodName.substring(3,4).toLowerCase()+methodName.substring(4));
System.out.println(s);
}
}
view.setJsp(viewName.get(result));
view.setParameters(map);
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
/*
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。
*/
return view;
}
public static void main(String[] args) {
SAXReader read = new SAXReader();
Document doc = null;
try {
doc = read.read(Struts.class.getResourceAsStream("struts.xml"));
} catch (DocumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Element root = doc.getRootElement();
list = root.elements();
for(Element e : list){
System.out.println(e.attributeValue("class"));
}
}
}