Java 反射 应用

利用反射 构造get set 方法：

 1 package com.wages.salary.service.common;
 2 
 3 import java.lang.reflect.InvocationTargetException;
 4 import java.lang.reflect.Method;
 5 
 6 import com.wages.salary.beans.Salary;
 7 
 8 public class BaseReflect {
 9     public static void setValue(Salary s, String value, String itemName) {
10         String methodName = "set" + itemName.charAt(0) + itemName.substring(1).toLowerCase();
11         try {
12             Method m = s.getClass().getMethod(methodName, String.class);
13             m.invoke(s, value);
14         } catch (NoSuchMethodException | SecurityException e) {
15             e.printStackTrace();
16         } catch (IllegalAccessException
17                 | IllegalArgumentException
18                 | InvocationTargetException e) {
19             e.printStackTrace();
20         }
21     }
22 
23     public static String getValue(Salary s, String itemName) {
24         String returnValue = null;
25         String methodName1 = "get" + itemName.charAt(0) + itemName.substring(1).toLowerCase();
26         try {
27             Method m1 = s.getClass().getMethod(methodName1, null);
28             returnValue = (String) m1.invoke(s,null);
29         } catch (NoSuchMethodException | SecurityException e) {
30             e.printStackTrace();
31         } catch (IllegalAccessException
32                 | IllegalArgumentException
33                 | InvocationTargetException e) {
34             e.printStackTrace();
35         }
36         return returnValue;
37     }
38 
39 }

 

  1 <%@page
  2     import="com.wages.salary.beans.*,com.wages.accountmanage.beans.Employee,java.util.*,com.wages.salary.service.common.*"%>
  3 <%@ page language="java" contentType="text/html; charset=GBK"
  4     pageEncoding="GBK"%>
  5 <%@taglib uri="/struts-tags" prefix="s"%>
  6 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  7 <html>
  8 <head>
  9 <meta http-equiv="Content-Type" content="text/html; charset=GBK">
 10 <title>Insert title here</title>
 11 <style>
 12 #myselect {
 13     
 14 }
 15 
 16 td {
 17     text-align: center;
 18     border-right: 1px solid #C1DAD7;
 19     border-bottom: 1px solid #C1DAD7;
 20 }
 21 
 22 th {
 23     font: bold 14px "Trebuchet MS", Verdana, Arial, Helvetica, sans-serif;
 24     color: #4f6b72;
 25     border-right: 1px solid #C1DAD7;
 26     border-bottom: 1px solid #C1DAD7;
 27     border-top: 1px solid #C1DAD7;
 28     letter-spacing: 2px;
 29     text-transform: uppercase;
 30     text-align: center;
 31     padding: 16px 6px 16px 12px;
 32     background: #CAE8EA no-repeat;
 33 }
 34 </style>
 35 </head>
 36 <body>
 37     <%-- <%@ include file="formshowandhidden.jsp" %> --%>
 38 
 39     <jsp:include page="formshowandhidden.jsp" />
 40 
 41     <form action="" method="post">
 42         <table align=center width=750 cellspacing="0" cellpadding="6">
 43 
 44 
 45 
 46             <%
 47                 List<Item> items = (List<Item>) session.getAttribute("items");  
                    List<Salary> salist = (List<Salary>) session.getAttribute("salarys");
 50                 List<Employee> emplist = (List<Employee>) session.getAttribute("employs");


 56                 if (items.size() <= 0 || items == null) {
 57             %>
 58             <tr align=center>
 59                 <th></th>
 60 
 61             </tr>
 62             <tr>
 63                 <td colspan="6">No data!</td>
 64             </tr>
 65 
 66             <%
 67                 } else {
 68             %>
 69 
 70             <tr align=center>
 71                 <th>工号</th>
 72                 <th>姓名</th>
 73                 <s:iterator value="#session.items">
 74                     <th><s:property value="itemvalue" /></th>
 75                 </s:iterator>
 76             </tr>
 77 
 78 
 79             <%
 80                 for (int i = 0; i < salist.size(); i++) {
 81             %>
 82             <tr>
 83                 <td><%=emplist.get(i).getEmployeeid()%></td>
 84                 <td><%=emplist.get(i).getEmployeename()%></td>
 85 
 86                 <%
 87                     for (int t = 0; t < items.size(); t++) {
 88                                 String itemName = items.get(t).getItemkey();
 89                 %>
 90                 <%
 91                     DESEcrption desPlus = new DESEcrption();
 92                 %>
 93                 <td><%=desPlus.decrypt(BaseReflect.getValue(
 94                                 salist.get(i), itemName))%></td>
 95                 <%-- <td><%=new String( MCrypt.decrypt( BaseReflect.getValue(salist.get(i), itemName) ))%></td> --%>
 96                 <%
 97                     }
 98                 %>
 99             </tr>
100             <%
101                 }
102                 }
103             %>
104 
105 
106 
107         </table>
108     </form>
109 </body>
110 </html>

 

posted on 2014-10-21 13:39  @冰糖  阅读(143)  评论(0)  编辑  收藏  举报

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