struct2中拦截器和Action的配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
	<!-- 指定struts2是否以开发模式运行
			1.热加载主配置.(不需要重启即可生效)
			2.提供更多错误信息输出,方便开发时的调试
	 -->
	<constant name="struts.devMode" value="true"></constant>
	<package name="crm" namespace="/" extends="struts-default" >
		<interceptors>
			<!-- 注册拦截器 -->
			<interceptor name="loginInterceptor" class="cn.web.interceptor.LoginInterceptor"></interceptor>
			<!-- 注册拦截器栈 -->
			<interceptor-stack name="myStack">
				<interceptor-ref name="loginInterceptor">
					<param name="excludeMethods">login</param>
				</interceptor-ref>
				<interceptor-ref name="defaultStack"></interceptor-ref>
			</interceptor-stack>
		</interceptors>
		<!-- 指定包中的默认拦截器栈 -->
		<default-interceptor-ref name="myStack"></default-interceptor-ref>
		<!-- 定义全局结果集 -->
		<global-results>
			<result name="toLogin" type="redirect" >/login.jsp</result>
		</global-results>
		<global-exception-mappings>
			<!-- 如果出现java.lang.RuntimeException异常,就将跳转到名为error的结果 -->
			<exception-mapping result="error" exception="java.lang.RuntimeException"></exception-mapping>
		</global-exception-mappings>
		
	
		<action name="CustomerAction_*" class="cn.web.action.CustomerAction" method="{1}" >
			<result name="list" >/jsp/customer/list.jsp</result>
			<result name="toList" type="redirectAction">
	             <param name="actionName">CustomerAction_list</param>
	             <param name="namespace">/</param>
	         </result>
		</action>
		<action name="UserAction_*" class="cn.web.action.UserAction" method="{1}" >
			<result name="toHome" type="redirect" >/index.htm</result>
			<result name="error"  >/login.jsp</result>
		</action>
	</package>
</struts>

拦截器代码：

public class LoginInterceptor extends MethodFilterInterceptor {

	@Override
	protected String doIntercept(ActionInvocation invocation) throws Exception {
		
		//1.获得session
		Map<String, Object> session = ActionContext.getContext().getSession();
		//2.获得登录标识
		Object object = session.get("user");
		//3.判断登录标识是否存在
		if(object == null){
			return "toLogin";
		}else{
			return invocation.invoke();
		}
	}

}

Action代码1：

public class CustomerAction extends ActionSupport implements ModelDriven<Customer>{
	private CustomerService cs = new CustomerServiceImpl();
	private Customer Customer = new Customer();
	
	public String list() throws Exception{
		//1 接受参数
		String cust_name = ServletActionContext.getRequest().getParameter("cust_name");
		//2 创建离线查询对象
		DetachedCriteria dc =DetachedCriteria.forClass(Customer.class);
		//3 判断参数拼装条件
		if(StringUtils.isNotBlank(cust_name)){
			dc.add(Restrictions.like("cust_name", "%"+cust_name+"%"));
		}
		//4 调用Service将离线对象传递
		List<Customer> list = cs.getAll(dc);
		//5 将返回的list放入request域.转发到list.jsp显示
		//ServletActionContext.getRequest().setAttribute("list", list);
		//5将返回的list放入ActionContext域。转发到list.jsp显示
		ActionContext.getContext().put("list", list);
		return "list";
	}
	
		

	//添加客户
	public String add() throws Exception {
		//1.调用service
		cs.save(Customer);
		//2.重定向到action方法
		return "toList";
	}



	@Override
	public Customer getModel() {
		return Customer ;
	}
	
}

Action代码2：

public class UserAction extends ActionSupport implements ModelDriven<User>{
	
	private User user = new User();
	private UserService us = new UserServiceImpl(); 
	
	@Override
	public String execute() throws Exception {
		//1.调用service执行登录操作
		User u = us.login(user);
		//2.将返回的user对象放入session域作为登录标识
		ActionContext.getContext().getSession().put("user", u);
		//3.重定向到项目的首页
		return "toHome";
	}

	@Override
	public User getModel() {
		return null;
	}

}

写Action的流程：

1.先继承ActionSupport类，实现 ModelDriven<T>接口

2.重写execute方法

3.实现未实现的类

写拦截器的流程：

1.继承MethodFilterInterceptor类

2.实现未实现的doIntercept方法

struct2中拦截器和Action的配置

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