package?com.tomo.common;

import?java.io.IOException;
import?java.io.InputStream;
import?java.util.HashMap;
import?java.util.Map;
import?java.util.Properties;

public?class?DaoFactory?{
	private?static?Properties?props?=?new?Properties（）;

	/**?用于緩存dao實例的Map?*/
	private?static?Mapject>?cache?=?new?HashMapject>（）;

	private?DaoFactory（）?{
	}

	static?{
		InputStream?is?=?Thread.currentThread（）.getContextClassLoader（）
				.getResourceAsStream（“dao.properties“）;
		try?{
			props.load（is）;

		}?catch?（IOException?e）?{
			System.err.println（“在classpath下沒有找到dao.properties文件，請檢查!“）;
			e.printStackTrace（）;
		}
	}

	public?static?object?getInstance（String?daoName）?{
		object?o?=?null;

		o?=?cache.get（daoName）;?//?先根據dao名稱去緩存Map中取對應的實例

		if?（null?==?o）?{?//?緩存中還不存在，就新創建，并存放到緩存中。
			String?className?=?props.getProperty（daoName）;
			if?（null?!=?className?&&?!““.equals（className））?{
				try?{
					o?=?Class.forName（className）.newInstance（）;

					cache.put（daoName?o）;
				}?catch?（InstantiationException?e）?{
					e.printStackTrace（）;
				}?catch?（IllegalAccessException?e）?{
					e.printStackTrace（）;
				}?catch?（ClassNotFoundException?e）?{
					e.printStackTrace（）;
				}
			}
		}

		return?o;
	}

	//?泛型方法
	public?static??T?getInstance（String?daoName?Class?clazz）?{
		T?t?=?null;

		object?temp?=?cache.get（daoName）;
		if?（null?==?temp）?{
			String?className?=?props.getProperty（daoName）;
			if?（null?!=?className?&&?!““.equals（className））?{
				try?{
					object?o?=?Class.forName（className）.newInstance（）;

					t?=?clazz.cast（o）;
					//?t?=?（T）o;

					cache.put（daoName?t）;
				}?catch?（InstantiationException?e）?{
					e.printStackTrace（）;
				}?catch?（IllegalAccessException?e）?{
					e.printStackTrace（）;
				}?catch?（ClassNotFoundException?e）?{
					e.printStackTrace（）;
				}
			}
		}?else?{
			t?=?clazz.cast（temp）;
		}
		return?t;
	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2019-05-26?18:43??SouceCode\
?????文件????????8196??2019-05-26?18:43??SouceCode\.DS_Store
?????目錄???????????0??2019-05-26?18:45??__MACOSX\
?????目錄???????????0??2019-05-26?18:45??__MACOSX\SouceCode\
?????文件?????????120??2019-05-26?18:43??__MACOSX\SouceCode\._.DS_Store
?????目錄???????????0??2019-05-26?13:26??SouceCode\library\
?????文件????????9628??2019-05-08?19:23??SouceCode\library\library.iml
?????文件?????????422??2019-05-26?13:26??SouceCode\library\build.gradle
?????目錄???????????0??2018-01-03?10:46??SouceCode\library\build\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\res\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\res\pngs\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\res\pngs\androidTest\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\res\pngs\androidTest\debug\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\res\pngs\debug\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\res\rs\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\res\rs\androidTest\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\res\rs\androidTest\debug\
?????目錄???????????0??2018-01-03?10:56??SouceCode\library\build\generated\res\rs\release\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\res\rs\debug\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\res\resValues\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\res\resValues\androidTest\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\res\resValues\androidTest\debug\
?????目錄???????????0??2018-01-03?10:56??SouceCode\library\build\generated\res\resValues\release\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\res\resValues\debug\
?????目錄???????????0??2018-01-03?10:46??SouceCode\library\build\generated\source\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\source\aidl\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\source\aidl\androidTest\
?????目錄???????????0??2019-05-08?19:21??SouceCode\library\build\generated\source\aidl\androidTest\debug\
?????目錄???????????0??2018-01-03?10:56??SouceCode\library\build\generated\source\aidl\release\
?????目錄???????????0??2019-05-08?19:13??SouceCode\library\build\generated\source\aidl\debug\
............此處省略3227個文件信息