struts2自定义拦截器（创建拦截器，拦截器配置）-蒲公英云

struts2自定义拦截器（创建拦截器，拦截器配置）

1.拦截器创建：

2.拦截器API：

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70

校验失败不放行，直接return字符串，如：success ，跳转页面返回信息

3.拦截器配置：struts.xml

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNTY2Nzcy_size_16_color_FFFFFF_t_70 1

web.xml,添加过滤器

<filter>
      <filter-name>struts2</filter-name>
      <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>

MyInterceptor过滤器：

public class MyInterceptor extends MethodFilterInterceptor{
    @Override
    protected String doIntercept(ActionInvocation invocation) throws Exception {
        //前处理
        System.out.println("before处理");
        //放行
        String result = invocation.invoke();
        //后处理
        System.out.println("after处理");
        return result;
    }
}

Action：InterceptorAction

public class InterceptorAction extends ActionSupport{
    public String print() throws Exception {
        System.out.println("Action.....print");
        return SUCCESS;
    }
    public String list() throws Exception {
        System.out.println("Action.....list");
        return SUCCESS;
    }
    public String add() throws Exception {
        System.out.println("Action.....add");
        return SUCCESS;
    }
}

struts.xml

<?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>
    <constant name="struts.devMode" value="true"></constant>
    <package name="result" namespace="/" extends="struts-default">
        <interceptors>
        <!-- 1.注册拦截器 -->
            <interceptor name="myInterceptor" class="com.it.action.MyInterceptor"></interceptor>
        <!-- 2.注册拦截器栈 -->
            <interceptor-stack name="myStack">
                <!-- 自定义拦截器引入 -->
                <interceptor-ref name="myInterceptor">
                    <!-- 指定哪些方法不拦截
                     <param name="excludeMethods">add</param> -->
                    <!-- 拦截哪些方法 -->
                    <param name="includeMethods">print,list</param>
                </interceptor-ref>
                <!-- 默认的拦截器 -->
                <interceptor-ref name="defaultStack"></interceptor-ref>
            </interceptor-stack>
        </interceptors>
        <!-- 3.指定默认拦截器 -->
        <default-interceptor-ref name="myStack"></default-interceptor-ref>
        <action name="DemoAction1_*" class="com.it.action.InterceptorAction" method="{1}">
            <result name="success" type="dispatcher">/hello.jsp</result>
        </action>
    </package>
</struts>