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Java 反射 应用

时间:2014-10-21 15:05:34      阅读:244      评论:0      收藏:0      [点我收藏+]

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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>

 

Java 反射 应用

标签:des   style   blog   http   color   io   os   ar   java   

原文地址:http://www.cnblogs.com/thrive/p/4040165.html

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