初识Struts（二）------使用步骤

     了解了Struts的基本流程之后，就要知道怎么用，怎么用Struts做开发让程序跑起来。。。
      这里我就用一个简单的登录项目来演示我的学习过程。(开发工具  MyEclipse6.0 + tomcat6.0)

    第一步：建立项目工程。在MyEclipse中new一个Web project为struts_login
    第二步：配置Struts。A：将下载的Struts框架包中lib下的所有jar包都拷贝到工程的WEB-INF/lib目录下；B：提供struts-config文件到WEB-INF目录下；C：在web.xml文件中配置ActionServlet，如下： 
    

 <!-- Standard Action Servlet Configuration -->
  <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
 </servlet>

  <!-- Standard Action Servlet Mapping -->
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>

 
     第三步：建立登录项目
        * 建立jsp页面(login.jsp,login_success.jsp,login_error.jsp) 
        * 建立ActionForm（LoginActionForm.java）

package cn.huan.struts;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/**
 * 登录的ActionForm负责收集数据
 * ActionForm中的属性名必须和表单中输入框的属性名相同
 * @author 刘银环
 *
 */
public class LoginActionForm extends ActionForm {
	
	private String username;
	private String password;
	/**
	 * @return the username
	 */
	public String getUsername() {
		return username;
	}
	/**
	 * @param username the username to set
	 */
	public void setUsername(String username) {
		this.username = username;
	}
	/**
	 * @return the passward
	 */
	public String getPassword() {
		return password;
	}
	/**
	 * @param passward the passward to set
	 */
	public void setPassword(String password) {
		this.password = password;
	}
		}

}

 
        * 建立Action(LoginAction.java)

package cn.huan.struts;

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

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

/**
 * 用户登录的Action
 * @author 刘银环
 *
 */
public class LoginAction extends Action {

	/* (non-Javadoc)
	 * @see org.apache.struts.action.Action#execute(org.apache.struts.action.ActionMapping, org.apache.struts.action.ActionForm, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
	 */
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		LoginActionForm laf = (LoginActionForm) form;
		
		String username = laf.getUsername();
		String password = laf.getPassword();
		
		
		if("admin".equals(username) && "admin".equals(password)){
			//跳转到login_sucess.jsp
			request.setAttribute("username", username);
			return mapping.findForward("success");
		}else{
			//跳转到login_error.jsp
			return mapping.findForward("error");
		}
		
}

 
        * 配置struts-config.xml
                 先配置ActionForm  :

(name指明该ActionForm的名字，type指明其类绝对路径)

<form-beans>
     <form-bean name="loginForm" type="cn.huan.struts.LoginActionForm"/>
  </form-beans>

 
                                   
                 再配置Action     :

(path指明该Action接受请求的uri，type指明其类绝对路径，name指明其关联的ActionForm名,<forward>标签配置跳转路径)

<action-mappings>
     <action path="/login" 
             type="cn.huan.struts.LoginAction"
             name="loginForm"
             scope="request"
             >
           <forward name="success" path="/login_success.jsp"/>
           <forward name="error" path="/login_error.jsp"/>
      </action>

 

 

至此，项目建成，接下来部署到tomcat，运行调试，ok…….