ongl(示例3-6 多值类型的数据处理)

使用ognl 实现多值处理，处理的值比较多，如数组，集合等类型的数据

//实体类省略

//创建action，其中包括两个成员变量 分别是两个double,string类型的数组

package cn.jbit.action;

import com.opensymphony.xwork2.ActionSupport;

public class ArraysDataTransferAction extends ActionSupport {
    private String[] hobbies;
    private Double[] numbers=new Double[3];
    
    public String execute(){
        System.out.println("hobbies的长度是"+hobbies.length);
        for(int i=0;i<hobbies.length;i++){
            System.out.println("hobbies数组中第"+i+"个元素是："+hobbies[i]);
        }
        System.out.println("numbers的长度是"+numbers.length);
        for(int i=0;i<numbers.length;i++){
            System.out.println("numbers数组中第"+i+"个元素是："+numbers[i]);
        }
        
        return SUCCESS;
    }
    public String[] getHobbies() {
        return hobbies;
    }
    public void setHobbies(String[] hobbies) {
        this.hobbies = hobbies;
    }
    public Double[] getNumbers() {
        return numbers;
    }
    public void setNumbers(Double[] numbers) {
        this.numbers = numbers;
    }
}

//再次创建另外一个action,ListDataTransferAction

package cn.jbit.action;

import com.opensymphony.xwork2.ActionSupport;
import cn.jbit.bean.*;
import java.util.*;

public class ListDataTransferAction extends ActionSupport {
    private List<String> hobbies;
    private List<Double> numbers;
    private List<User> users;
    
    public String execute(){
        System.out.println("hobbies的长度是"+hobbies.size());
        for(int i=0;i<hobbies.size();i++){
            System.out.println("hobbies数组中第"+i+"个元素是："+hobbies.get(i));
        }
        System.out.println("numbers的长度是"+numbers.size());
        for(int i=0;i<numbers.size();i++){
            System.out.println("numbers数组中第"+i+"个元素是："+numbers.get(i));
        }
        System.out.println("users的长度是"+users.size());
        for(int i=0;i<users.size();i++){
            System.out.println("users数组中第"+i+"个元素是："+users.get(i).getName());
        }
        return SUCCESS;
    }
    public List<String> getHobbies() {
        return hobbies;
    }
    public void setHobbies(List<String> hobbies) {
        this.hobbies = hobbies;
    }
    public List<Double> getNumbers() {
        return numbers;
    }
    public void setNumbers(List<Double> numbers) {
        this.numbers = numbers;
    }
    public List<User> getUsers() {
        return users;
    }
    public void setUsers(List<User> users) {
        this.users = users;
    }

}

package cn.jbit.action;

import com.opensymphony.xwork2.ActionSupport;
import cn.jbit.bean.*;
import java.util.*;

public class ListDataTransferAction extends ActionSupport {
    private List<String> hobbies;
    private List<Double> numbers;
    private List<User> users;
    
    public String execute(){
        System.out.println("hobbies的长度是"+hobbies.size());
        for(int i=0;i<hobbies.size();i++){
            System.out.println("hobbies数组中第"+i+"个元素是："+hobbies.get(i));
        }
        System.out.println("numbers的长度是"+numbers.size());
        for(int i=0;i<numbers.size();i++){
            System.out.println("numbers数组中第"+i+"个元素是："+numbers.get(i));
        }
        System.out.println("users的长度是"+users.size());
        for(int i=0;i<users.size();i++){
            System.out.println("users数组中第"+i+"个元素是："+users.get(i).getName());
        }
        return SUCCESS;
    }
    public List<String> getHobbies() {
        return hobbies;
    }
    public void setHobbies(List<String> hobbies) {
        this.hobbies = hobbies;
    }
    public List<Double> getNumbers() {
        return numbers;
    }
    public void setNumbers(List<Double> numbers) {
        this.numbers = numbers;
    }
    public List<User> getUsers() {
        return users;
    }
    public void setUsers(List<User> users) {
        this.users = users;
    }

}

struts.xml 

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC 
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <!-- <constant name="struts.custom.i18n.resources" value="message"/>     -->
    <package name="default" extends="struts-default">    
        <action name="ArraysDataTransfer" class="cn.jbit.action.ArraysDataTransferAction">
            <result name="success">result2.jsp</result>
        </action>
        <action name="listDataTransfer" class="cn.jbit.action.ListDataTransferAction">
            <result>result2.jsp</result>
        </action>
        

    </package>
</struts>

首先需要做的是接受数据，创建出表单数据；

array_input.jsp和list_input.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<%
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="styles.css">
    -->
  </head>
  
  <body>
    <s:form action="ArraysDataTransfer.action">
        <s:textfield name="hobbies" label="爱好："/>
        <s:textfield name="hobbies" label="爱好："/>
        <s:textfield name="hobbies" label="爱好："/>
        
        <s:textfield name="numbers[0]" label="数字："/>
        <s:textfield name="numbers[1]" label="数字："/>
        <s:textfield name="numbers[2]" label="数字："/>
        <s:submit value="提交"/>
    </s:form>
  </body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags" %>
<%
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="styles.css">
    -->
  </head>
  
  <body>
    <s:form action="listDataTransfer">
        <s:textfield name="hobbies" label="爱好："/>
        <s:textfield name="hobbies" label="爱好："/>
        <s:textfield name="hobbies" label="爱好："/>
        
        <s:textfield name="numbers[0]" label="数字："/>
        <s:textfield name="numbers[1]" label="数字："/>
        <s:textfield name="numbers[2]" label="数字："/>
        
        <s:textfield name="users.name" label="姓名："/>
        <s:textfield name="users.name" label="姓名："/>
        <s:textfield name="users.name" label="姓名："/>
        <s:submit value="提交"/>
    </s:form>
  </body>
</html>

之后分别访问http://localhost:8080/Struts2_OGNL/ArraysDataTransfer和http://localhost:8080/Struts2_OGNL/listDataTransfer