JAVA_WEB Struts2学习：struts2自定义类型转换类

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OGNL学习：
JSP跟servlet的区别，JSP是不是客户端？
浏览器能看到的只有HTML。

拦截器的执行顺序为：

在Action的控制方法执行之前，位于拦截器链前面的拦截器将先起作用

，在action的控制方法执行之后，位于拦截器链前面的拦截器将后起作用。
自定义拦截器的实现，应该实现com.opensymphony.xwork2.interceptor.Interceptor接口，该接口有三个方法
1.void destory();//销毁该拦截器之前的回调方法
2.void init(); //初始化该拦截器的回调方法

3.String intercept(ActionInvocation invocation);//拦截器实现拦截的逻辑方法，如果该方法直接返回一个字符串，系统将会跳转到该逻辑视图对应的实际视图资源，不会调用被拦截的action。

以下是源代码演示：

1.index：

<%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ taglib uri="/struts-tags" prefix="s" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">        <title>My JSP 'index.jsp' starting page</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0">    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><link rel="stylesheet" type="text/css" href="<%=path%>/js/My97DatePicker/skin/WdatePicker.css"><script language="javascript" type="text/javascript" src="<%=path%>/js/My97DatePicker/WdatePicker.js"></script>  </head>    <body>    <s:form action="myAction!init">    <table><caption>OGNL练习</caption>    <s:textfield name="age" label="年龄"></s:textfield>    <s:fielderror fieldName="age"></s:fielderror>        <s:textfield name="birthday" label="生日"     onfocus="WdatePicker({isShowClear:false,readOnly:true,doubleCalendar:false,dateFmt:'yyyy-MM-dd HH:mm:ss'})" class="Wdate">    </s:textfield>    <s:fielderror fieldName="birthday"></s:fielderror>        <s:textfield name="point" label="坐标"></s:textfield>    <s:fielderror fieldName="point"></s:fielderror>        <s:submit value=" 提 交 "></s:submit>    </table>    </s:form>  </body></html>

2.struts.xml：

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts><package name="testPage" extends="struts-default"><!-- 配置拦截器 --><interceptors><interceptor name="myInterceptor" class="com.zuxia.yc42.myinterceptor.MyInterceptor"></interceptor><!--  自定义拦截器 --><interceptor-stack name="myStack"><!-- 把struts默认的拦截器组加上 --><interceptor-ref name="defaultStack"></interceptor-ref><!-- 加上我们自定义的拦截器 --><interceptor-ref name="myInterceptor"></interceptor-ref></interceptor-stack></interceptors><!--设置我们自己组装成的myStack拦截器组为默认拦截器 --><!--<default-action-ref name="myStack"></default-action-ref>--><action name="testAction1" class="com.zuxia.yc42.action.TestAction1"><result name="success">/jsp/success.jsp</result><!-- 调用我们自己组装成的myStack拦截器组 --><interceptor-ref name="myStack"></interceptor-ref></action><action name="testAction2" class="com.zuxia.yc42.action.MyTestaAction1"><result name="success">/jsp/success.jsp</result><result name="input">/jsp/point.jsp</result></action></package></struts>

3.xwork-conversion.properties：

com.zuxia.yc42.util.PointConverter=com.zuxia.yc42.util.DateConverter

4.com.zuxia.yc42.util.DateConverter extends StrutsTypeConverter :

package com.zuxia.yc42.util;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Map;import org.apache.struts2.util.StrutsTypeConverter;public class DateConverter extends StrutsTypeConverter {private SimpleDateFormat[] sm = {new SimpleDateFormat("yyyy年MM月dd日"), new SimpleDateFormat("yyyy-MM-dd"), new SimpleDateFormat("yyyy.MM.dd"), new SimpleDateFormat("yyyy/MM/dd"), new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒"), new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"), new SimpleDateFormat("yyyy.MM.dd HH:mm:ss"), new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"),};@Overridepublic Object convertFromString(Map context, String[] values, Class toType) {String time = values[0];Date date = null;for(SimpleDateFormat simple:sm){try {date = simple.parse(time);} catch (ParseException e) {continue;}}return date;}@Overridepublic String convertToString(Map context, Object obj) {SimpleDateFormat simple = new SimpleDateFormat("yyyy年MM月dd日 HH时mm分ss秒");return simple.format((Date)obj);}}

5.com.zuxia.yc42.util.PointConverter extends StrutsTypeConverter:

package com.zuxia.yc42.util;import java.util.Map;import org.apache.struts2.util.StrutsTypeConverter;import com.zuxia.yc42.po.Point;/** * 自定义类型转换类 * @author wang_hao * */public class PointConverter extends StrutsTypeConverter {/** * 将客户端数据转换成服务器端数据类型 */@Overridepublic Object convertFromString(Map context, String[] values, Class toType) {String value = values[0];String[] vals = value.split(",");Integer x = Integer.parseInt(vals[0]);Integer y = Integer.parseInt(vals[1]);Point point = new Point();point.setX(x);point.setY(y);return point;}/** * 将服务器端数据类型转换为String类型 */@Overridepublic String convertToString(Map context, Object obj){return obj.toString();}}

6.com.zuxia.yc42.action.MyTestAction extends ActionSupport:

package com.zuxia.yc42.action.MyTestAction extends ActionSupport;import java.util.Date;import com.opensymphony.xwork2.ActionSupport;import com.zuxia.yc42.po.Point;public class MyTestAction extends ActionSupport{private Integer age;private Date birthday;private Point point;public String init(){Object o = new Object();System.out.println(age.toString()+"\t"+birthday+"\t"+point);return SUCCESS;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Date getBirthday() {return birthday;}public void setBirthday(Date birthday) {this.birthday = birthday;}public Point getPoint() {return point;}public void setPoint(Point point) {this.point = point;}}