struts2学习笔记1-初学Struts2

首先struts2有六个必须的包
struts2必须的包
commons-logging-1.0.4.jar
freemarker-2.3.13.jar
ognl-2.6.11.jar
struts2-core-2.1.6.jar
xwork-2.1.2.jar
commons-fileupload-1.2.1.jar(上传文件的，不上传文件可以不要)

struts2和struts1不同的是，采用的是filter,而不是servlet
web.xml文件

  	struts2
  	org.apache.struts2.dispatcher.FilterDispatcher
  

  
  	struts2
  	/*
  

struts2的参数收集不像struts1那样依靠ActionForm,也不用extends Action
不依赖struts2的任何类

package com.langhua.action;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{
	private String username;

	private String password;

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String execute() throws Exception{
		if("langhua".equals(this.getUsername().trim()) && "123456".equals(this.getPassword().trim())){
			return "success";
		}else{
			this.addFieldError("username","username or password is error");
			return "Error";
		}
	}

	@Override
	public void validate() {
		if(null == this.getUsername() || "".equals(this.getUsername().trim())){
			this.addFieldError("username", "username not null");			
		}
		if(null == this.getPassword() || "".equals(this.getPassword().trim())){
			this.addFieldError("password", "password not null");
		}
	}

}

struts2的配置文件在Eclipse里面要放到src目录下，这样部署到容器里面的时候，就会放到WEB-INF\classes目录下面

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">


	
	
		
		
			
			/langhua/result.jsp
/login2.jsp
			/login2.jsp
		
	

jsp页面

<%@ taglib prefix="s" uri="/struts-tags" %>