?? daofactory.java
字號:
package com.ibm.ta.dao;
import java.sql.Connection;
import java.sql.SQLException;
import javax.sql.DataSource;
import com.ibm.ta.webservice.DBConfig;
import com.ibm.ta.webservice.ServiceLocator;
import com.ibm.ta.webservice.TAServiceException;
import com.ibm.ta.dao.db2.DB2DAOFactory;
import com.ibm.ta.dao.mysql.MySQLDAOFactory;
public abstract class DAOFactory {
private DBConfig dbConfig;
public abstract CourseDAO getCourseDAO();
public abstract StudentDAO getStudentDAO();
public abstract EnrollmentDAO getEnrollmentDAO();
public static DAOFactory getDAOFactory(DBConfig dbConfig) {
switch (dbConfig.getDbType()) {
case DBConfig.DB2:
return new DB2DAOFactory(dbConfig);
case DBConfig.MYSQL:
return new MySQLDAOFactory(dbConfig);
default:
return null;
}
}
public DAOFactory(DBConfig dbConfig) {
this.dbConfig = dbConfig;
}
// Create database connections from the values in dbConfig
public Connection createConnection() throws DAOException {
try {
String str = "java:comp/env/" + dbConfig.getResRef();
DataSource dataSource = (DataSource) ServiceLocator.getInstance()
.getDataSource(str);
return dataSource.getConnection();
} catch (SQLException se) {
throw new DAOException(se.getMessage(), se);
} catch (TAServiceException tase) {
throw new DAOException(tase.getMessage(), tase);
}
}
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -