struts2学习笔记

package cn.edu.bzu.controller;

import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Enumeration;
import java.util.Properties;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.edu.bzu.action.Action;

/**
 * Servlet implementation class CoreServlet核心控制器类
 */
public class CoreServlet extends HttpServlet {
 private static final long serialVersionUID = 1L;
      
    /**
     * @see HttpServlet#HttpServlet()
     */
    public CoreServlet() {
        super();
    }
   
 Properties actions = new Properties();
 Properties mapping = new Properties();
 
 
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 
  String path = request.getServletPath();
  System.out.println("path为:"+path);
  String actionName = path.substring(1, path.lastIndexOf(".do"));
  System.out.println("actionName==="+actionName);
  Action action = null;
  try {
   action = (Action) Class.forName(actions.getProperty(actionName)).newInstance();
   System.out.println("action的实例==="+action.getClass().toString());
  } catch (InstantiationException e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  } catch (IllegalAccessException e1) {
   e1.printStackTrace();
  } catch (ClassNotFoundException e1) {
   e1.printStackTrace();
  }
 
 
  
    Enumeration s=request.getParameterNames();
      
        Method m;

         while(s.hasMoreElements()){
          String values= s.nextElement().toString();
          //String []s1=request.getParameterValues(s.nextElement().toString());
          String s1=request.getParameter(values);
          
          String valuesChangeMethod=values.substring(0,1).toUpperCase()+values.substring(1);
          try {
     m=action.getClass().getMethod("set"+valuesChangeMethod, String.class);
     m.invoke(action,s1 );
    } catch (Exception e) {
     e.printStackTrace();
    }
          
         }
  
      String mapping1=action.execute();
  
   String forward = mapping.getProperty(mapping1);
  request.getRequestDispatcher(forward).forward(request, response);
 
 }

 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

 this.doGet(request, response);
 }

 public void init() throws ServletException {
  try {
   System.out.println("getClass()==="+this.getClass());
   actions.load(getClass().getResourceAsStream("/struts.properties"));
   mapping.load(getClass().getResourceAsStream("/mapping.properties"));
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
}
 

//定义接口

package cn.edu.bzu.action;

public interface Action {
 
 String execute();
}
 

//具体实现类

package cn.edu.bzu.action;

public class LoginAction implements Action {
  
 
 private String name;
 private String password;
 @Override
 public String execute() {
 System.out.println("this.getName为:"+this.getName()); 
 System.out.println("this.getName为:"+this.getPassword());  
  return "/index";
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getPassword() {
  return password;
 }
 public void setPassword(String password) {
  this.password = password;
 }

}
//属性文件

mapping

/index=/toLogin.jsp

struts

login=cn.edu.bzu.action.LoginAction

描述文件(web.xml)

 <servlet>
    <description></description>
    <display-name>CoreServlet</display-name>
    <servlet-name>CoreServlet</servlet-name>
    <servlet-class>cn.edu.bzu.controller.CoreServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>CoreServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

FORM表单

<form action="login.do" method="post">
<input type="text" name="name"><br>
<input type="password" name="password"><br>
<input type="submit" value="submit"></form>