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在實際mis項目中增刪改查必不可少,針對"改"的操作,重要的項目中都要有變更歷史記錄.本實例提供了一個實體屬性變更歷史記錄工具類,只要寫很少的代碼就能實現強大的變更歷史記錄功能.本工具類的主要優點是1.工具類對實體對象沒有依賴性,任何對象都能記錄歷史.2.只要編寫很少的代碼就能實現需求. 3.所有屬性都記錄變更歷史太多,有些屬性我不想記錄變更歷史. 4.實體屬性變化前后的值需要把編碼轉成有意義的文字.例如:實體類中性別用 0,1表示,而希望變更歷史中記錄前后變化的值是"男","女". 5.傳入實體對象自動識別實體Id,而不需要手工傳入. 6.實體的屬性名不好記,想加一個好記別名,這樣便于

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代碼片段和文件信息 

package?com.tgb.lk.history;

import?java.util.Date;

public?class?History?{
	private?int?id;
	private?String?entity;?//?實體類名標記是哪個實體類
	private?String?entityId;?//?實體對象的Id
	private?String?property;?//?實體的屬性名標記實體的哪個屬性發生修改
	private?String?oldValue;?//?原屬性值
	private?String?newValue;?//?新屬性值
	private?String?user;?//?修改人
	private?Date?modifyDate;?//?修改時間
	private?String?desc;?//?描述

	public?int?getId（）?{
		return?id;
	}

	public?void?setId（int?id）?{
		this.id?=?id;
	}

	public?String?getEntityId（）?{
		return?entityId;
	}

	public?void?setEntityId（String?entityId）?{
		this.entityId?=?entityId;
	}

	public?String?getEntity（）?{
		return?entity;
	}

	public?void?setEntity（String?entity）?{
		this.entity?=?entity;
	}

	public?String?getProperty（）?{
		return?pro

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????301??2012-10-20?12:17??HistoryDemo\.classpath

?????文件????????387??2012-10-20?13:47??HistoryDemo\.project

?????文件????????629??2012-09-24?16:56??HistoryDemo\.settings\org.eclipse.jdt.core.prefs

?????文件???????2712??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history\History.class

?????文件???????1136??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history\HistoryTest.class

?????文件???????3017??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history\HistoryUtil.class

?????文件???????1448??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history\Student.class

?????文件???????2930??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2\History.class

?????文件????????435??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2\HistoryAlias.class

?????文件????????390??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2\HistoryId.class

?????文件????????404??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2\HistoryNotRecord.class

?????文件???????1001??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2\HistoryTest.class

?????文件???????4646??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2\HistoryUtil.class

?????文件???????1670??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2\Person.class

?????文件???????1908??2012-10-20?12:54??HistoryDemo\src\com\tgb\lk\history\History.java

?????文件????????642??2012-10-20?12:49??HistoryDemo\src\com\tgb\lk\history\HistoryTest.java

?????文件???????2106??2012-10-20?12:46??HistoryDemo\src\com\tgb\lk\history\HistoryUtil.java

?????文件????????731??2012-10-16?17:58??HistoryDemo\src\com\tgb\lk\history\Student.java

?????文件???????2092??2012-10-20?13:35??HistoryDemo\src\com\tgb\lk\history2\History.java

?????文件????????319??2012-10-20?12:46??HistoryDemo\src\com\tgb\lk\history2\HistoryAlias.java

?????文件????????284??2012-10-20?12:46??HistoryDemo\src\com\tgb\lk\history2\HistoryId.java

?????文件????????291??2012-10-20?12:46??HistoryDemo\src\com\tgb\lk\history2\HistoryNotRecord.java

?????文件????????536??2012-10-20?12:49??HistoryDemo\src\com\tgb\lk\history2\HistoryTest.java

?????文件???????3556??2012-10-20?13:01??HistoryDemo\src\com\tgb\lk\history2\HistoryUtil.java

?????文件????????840??2012-10-20?12:46??HistoryDemo\src\com\tgb\lk\history2\Person.java

?????目錄??????????0??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history

?????目錄??????????0??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk\history2

?????目錄??????????0??2012-10-20?12:20??HistoryDemo\src\com\tgb\lk\history

?????目錄??????????0??2012-10-20?12:21??HistoryDemo\src\com\tgb\lk\history2

?????目錄??????????0??2012-10-20?13:47??HistoryDemo\bin\com\tgb\lk

............此處省略12個文件信息

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